/* --- Keyframe Animations --- */
@keyframes rainbow-text-cycle {
    0%   { color: hsl(0, 90%, 65%); } 16%  { color: hsl(60, 90%, 60%); } 33%  { color: hsl(120, 80%, 60%); }
    50%  { color: hsl(180, 80%, 60%); } 66%  { color: hsl(240, 80%, 65%); } 83%  { color: hsl(300, 80%, 65%); }
    100% { color: hsl(360, 90%, 65%); }
}

@keyframes rotate-segmented-ring {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

@keyframes rainbow-gradient-anim {
   0%   { background-position: 0% 50%; } 50%  { background-position: 100% 50%; } 100% { background-position: 0% 50%; }
}
@keyframes wave {
    from { transform: scale(0.2); opacity: 1; } to { transform: scale(4); opacity: 0; }
}

/* For View Transitions API - Rainbow Circle Reveal */
@keyframes reveal-rainbow-circle {
  from {
    clip-path: circle(0% at var(--x) var(--y));
  }
  to {
    clip-path: circle(150vmax at var(--x) var(--y)); /* Ensures coverage from any point */
  }
}

@keyframes card-entry-animation {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes fadeInView {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}


/* --- CSS Variables (Theme & Layout) --- */
:root {
    /* Light Theme */
    --cor-primaria-claro: #fcfcfd;
    --cor-secundaria-claro: #6c757d;
    --cor-texto-claro: #1f2328;
    --cor-fundo-menu-claro: rgba(255, 255, 255, 0.95);
    --cor-fundo-menu-claro-transparente: rgba(230, 230, 230, 0.6);
    --cor-borda-menu-claro: rgba(0, 0, 0, 0.08);
    --cor-sombra-menu-claro: rgba(0, 0, 0, 0.06); /* Base for top bar shadow */
    --cor-hover-menu-claro: rgba(240, 242, 245, 0.9);
    --cor-fundo-card-claro: #ffffff;
    --cor-ripple-claro: rgba(0, 0, 0, 0.08);
    --cor-borda-menu-claro-sombra: rgba(0, 0, 0, 0.12); /* For 3D edge */
    --cor-sucesso-claro: #28a745;
    --cor-erro-claro: #dc3545;
    --cor-fundo-sucesso-claro: rgba(40, 167, 69, 0.1);
    --cor-fundo-erro-claro: rgba(220, 53, 69, 0.1);
    --cor-borda-sucesso-claro: rgba(40, 167, 69, 0.3);
    --cor-borda-erro-claro: rgba(220, 53, 69, 0.3);

    /* Dark Theme */
    --cor-primaria-escuro: #0d1117;
    --cor-secundaria-escuro: #8b949e;
    --cor-texto-escuro: #c9d1d9;
    --cor-fundo-menu-escuro: rgba(22, 27, 34, 0.95);
    --cor-fundo-menu-escuro-transparente: rgba(30, 36, 44, 0.6);
    --cor-borda-menu-escuro: rgba(255, 255, 255, 0.1);
    --cor-sombra-menu-escuro: rgba(0, 0, 0, 0.3); /* Base for top bar shadow */
    --cor-hover-menu-escuro: rgba(30, 36, 44, 0.9);
    --cor-fundo-card-escuro: #161b22;
    --cor-ripple-escuro: rgba(255, 255, 255, 0.08);
    --cor-borda-menu-escuro-sombra: rgba(35, 42, 51, 0.9); /* For 3D edge - dark */
    --cor-sucesso-escuro: #34c759;
    --cor-erro-escuro: #ff453a;
    --cor-fundo-sucesso-escuro: rgba(52, 199, 89, 0.15);
    --cor-fundo-erro-escuro: rgba(255, 69, 58, 0.15);
    --cor-borda-sucesso-escuro: rgba(52, 199, 89, 0.4);
    --cor-borda-erro-escuro: rgba(255, 69, 58, 0.4);


    /* Specific borders for Module elements */
    --cor-borda-modulecard-claro: rgba(0, 0, 0, 0.035);
    --cor-borda-modulecard-escuro: rgba(255, 255, 255, 0.035);
    --cor-borda-innermodule-claro: rgba(0, 0, 0, 0.04);
    --cor-borda-innermodule-escuro: rgba(255, 255, 255, 0.06);


    /* Fonts */
    --fonte-principal: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --fonte-secundaria: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --fonte-destaque: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    /* Layout & Effects */
    --borda-arredondada: clamp(16px, 1.5vw + 10px, 20px); /* Fluid border radius */
    --borda-arredondada-pequena: clamp(10px, 1vw + 6px, 12px); /* Fluid small border radius */
    --transicao-rapida: all 0.2s ease-out;
    --transicao-media: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    /* Accessibility */
    --cor-foco: #007aff; /* Retained for focus outlines */
    --cor-foco-rgb: 0, 122, 255; /* Retained for focus outlines */

    /* 3D Button Vars - Light Theme */
    --btn-learning-card-light-edge-color: rgba(0, 0, 0, 0.15);
    --btn-learning-card-light-shadow-color: rgba(0, 0, 0, 0.08);
    --btn-learning-card-light-active-inset-shadow: rgba(0,0,0,0.05);

    --btn-module-light-bg: var(--cor-fundo-menu-claro-transparente);
    --btn-module-light-hover-bg: var(--cor-hover-menu-claro);
    --btn-module-light-active-bg: rgba(220, 222, 225, 0.85);
    --btn-module-light-edge-color: rgba(0, 0, 0, 0.12);
    --btn-module-light-shadow-color: rgba(0, 0, 0, 0.06);
    --btn-module-light-active-inset-shadow: rgba(0,0,0,0.1);

    --btn-close-light-bg: rgba(0,0,0,0.03);
    --btn-close-light-hover-bg: rgba(0,0,0,0.06);
    --btn-close-light-active-bg: rgba(0,0,0,0.04);
    --btn-close-light-edge-color: rgba(0,0,0,0.1);
    --btn-close-light-shadow-color: rgba(0,0,0,0.05);
    --btn-close-light-active-inset-shadow: rgba(0,0,0,0.08);

    --btn-quiz-light-bg: var(--btn-module-light-bg);
    --btn-quiz-light-hover-bg: var(--btn-module-light-hover-bg);
    --btn-quiz-light-active-bg: var(--btn-module-light-active-bg);
    --btn-quiz-light-text-color: var(--cor-texto-claro);

    /* Calculator Game Button */
    --btn-calculator-light-bg: var(--cor-fundo-menu-claro-transparente);
    --btn-calculator-light-hover-bg: var(--cor-hover-menu-claro);
    --btn-calculator-light-active-bg: rgba(220, 222, 225, 0.85);
    --btn-calculator-light-text-color: var(--cor-texto-claro);

    --btn-calculator-utility-light-bg: var(--btn-module-light-bg);
    --btn-calculator-utility-light-hover-bg: var(--btn-module-light-hover-bg);
    --btn-calculator-utility-light-active-bg: var(--btn-module-light-active-bg);
    --btn-calculator-utility-light-text-color: var(--cor-texto-claro);

    --btn-calculator-equals-light-bg: var(--cor-texto-claro);
    --btn-calculator-equals-light-hover-bg: #333333;
    --btn-calculator-equals-light-active-bg: #4a4a4a;
    --btn-calculator-equals-light-text-color: var(--cor-primaria-claro);
    --calculator-display-light-bg: rgba(0,0,0,0.025);


    /* Common 3D Button Geometry & Timing */
    --btn-edge-height-static: 3px;
    --btn-edge-height-active: 0px;
    --btn-translate-y-active-press: 1px;
    --btn-transition-duration: 0.15s;
}

/* --- Global Styles & Resets --- */
html {
    font-size: clamp(15px, calc(14px + 0.3125vw), 16px);
    scroll-behavior: smooth;
    box-sizing: border-box;
}
*, *:before, *:after {
     box-sizing: inherit;
     -webkit-tap-highlight-color: transparent;
}
body {
    background-color: var(--cor-primaria-claro);
    color: var(--cor-texto-claro);
    margin: 0;
    font-family: var(--fonte-principal);
    overflow-x: hidden;
    line-height: clamp(1.65, calc(1.55 + 0.03125vw), 1.75);
    padding-top: clamp(1.5rem, calc(0.5rem + 2.5vw), 2.5rem);
    padding-bottom: clamp(6rem, calc(5rem + 2.5vw), 7rem);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    user-select: none;
    -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none;
    transition: background-color 0.4s ease, color 0.4s ease;
    min-height: 100vh;
}
body.dark-mode {
    background-color: var(--cor-primaria-escuro);
    color: var(--cor-texto-escuro);
    --cor-foco: #0a84ff; /* Retained for focus outlines */
    --cor-foco-rgb: 10, 132, 255; /* Retained for focus outlines */

    /* 3D Button Vars - Dark Theme */
    --btn-learning-card-dark-edge-color: rgba(0, 0, 0, 0.3);
    --btn-learning-card-dark-shadow-color: rgba(0, 0, 0, 0.2);
    --btn-learning-card-dark-active-inset-shadow: rgba(0,0,0,0.15);

    --btn-module-dark-bg: var(--cor-fundo-menu-escuro-transparente);
    --btn-module-dark-hover-bg: var(--cor-hover-menu-escuro);
    --btn-module-dark-active-bg: rgba(40, 46, 54, 0.85);
    --btn-module-dark-edge-color: rgba(0, 0, 0, 0.25);
    --btn-module-dark-shadow-color: rgba(0, 0, 0, 0.15);
    --btn-module-dark-active-inset-shadow: rgba(0,0,0,0.2);

    --btn-close-dark-bg: rgba(255,255,255,0.05);
    --btn-close-dark-hover-bg: rgba(255,255,255,0.1);
    --btn-close-dark-active-bg: rgba(255,255,255,0.07);
    --btn-close-dark-edge-color: rgba(0,0,0,0.25);
    --btn-close-dark-shadow-color: rgba(0,0,0,0.15);
    --btn-close-dark-active-inset-shadow: rgba(0,0,0,0.12);

    --btn-quiz-dark-bg: var(--btn-module-dark-bg);
    --btn-quiz-dark-hover-bg: var(--btn-module-dark-hover-bg);
    --btn-quiz-dark-active-bg: var(--btn-module-dark-active-bg);
    --btn-quiz-dark-text-color: var(--cor-texto-escuro);

    /* Calculator Game Button - Dark Theme */
    --btn-calculator-dark-bg: var(--cor-fundo-menu-escuro-transparente);
    --btn-calculator-dark-hover-bg: var(--cor-hover-menu-escuro);
    --btn-calculator-dark-active-bg: rgba(40, 46, 54, 0.85);
    --btn-calculator-dark-text-color: var(--cor-texto-escuro);

    --btn-calculator-utility-dark-bg: var(--btn-module-dark-bg);
    --btn-calculator-utility-dark-hover-bg: var(--btn-module-dark-hover-bg);
    --btn-calculator-utility-dark-active-bg: var(--btn-module-dark-active-bg);
    --btn-calculator-utility-dark-text-color: var(--cor-texto-escuro);

    --btn-calculator-equals-dark-bg: var(--cor-texto-escuro);
    --btn-calculator-equals-dark-hover-bg: #dddddd;
    --btn-calculator-equals-dark-active-bg: #cccccc;
    --btn-calculator-equals-dark-text-color: var(--cor-primaria-escuro);
    --calculator-display-dark-bg: rgba(255,255,255,0.035);
}

/* --- Bottom Bar (Previously Top Bar) --- */
.top-bar {
    position: fixed;
    bottom: clamp(0.8rem, 0.5rem + 1vw, 1.2rem);
    left: 50%;
    opacity: 0;
    transform: translateX(-50%) translateY(100px);
    width: clamp(90%, 88% + 2vw, 92%);
    max-width: 560px;
    border-radius: clamp(20px, 15px + 2vw, 30px);
    z-index: 1000;
    background-color: var(--cor-borda-menu-claro-sombra);
    box-shadow: 0 -1px 2px rgba(0,0,0,0.04), 0 -6px 20px rgba(0,0,0,0.07);
    padding: 4px 3px 2px 3px;
    transition: background-color 0.4s ease,
                box-shadow 0.4s ease,
                transform var(--transicao-media),
                bottom var(--transicao-media),
                opacity var(--transicao-media);
}
body.dark-mode .top-bar {
    background-color: var(--cor-borda-menu-escuro-sombra);
    box-shadow: 0 -1px 2px rgba(0,0,0,0.15), 0 -6px 25px var(--cor-sombra-menu-escuro);
}

.top-bar-inner {
    width: 100%; height: 100%;
    display: flex; justify-content: space-between; align-items: center;
    padding: clamp(0.4rem, 0.2rem + 0.5vw, 0.5rem) clamp(0.6rem, 0.4rem + 0.8vw, 0.8rem);
    border-radius: calc(clamp(20px, 15px + 2vw, 30px) - 3px);
    background-color: var(--cor-fundo-menu-claro);
    backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px);
    box-shadow: inset 0 0.5px 0.5px rgba(0,0,0,0.04),
                inset 0 -0.5px 0.5px rgba(255,255,255,0.6),
                0 -0.5px 1px rgba(0,0,0,0.06);
    transition: background-color 0.4s ease, box-shadow 0.4s ease;
}
body.dark-mode .top-bar-inner {
    background-color: var(--cor-fundo-menu-escuro);
    box-shadow: inset 0 0.5px 0.5px rgba(0,0,0,0.25),
                inset 0 -0.5px 0.5px rgba(255,255,255,0.07),
                0 -0.5px 1px rgba(0,0,0,0.18);
}


.top-bar-left, .top-bar-right {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: clamp(0.2rem, 0.1rem + 0.5vw, 0.3rem);
    min-width: clamp(38px, 30px + 2vw, 42px);
}


.top-bar-center {
    flex-grow: 1;
    text-align: center;
    margin: 0 clamp(0.3rem, 0.1rem + 0.5vw, 0.5rem);
    position: relative;
    height: 1.62em;
    display: flex;
    justify-content: center;
    align-items: center;
}

.site-name-mia, .site-name-flashcards {
    font-size: clamp(1.1rem, calc(0.9rem + 0.625vw), 1.35rem);
    font-weight: 700;
    color: var(--cor-texto-claro);
    font-family: var(--fonte-destaque);
    letter-spacing: -0.5px;
    line-height: 1.2;
    white-space: nowrap;
    position: absolute;
    left: 50%;
    transform: translateX(-50%) translateY(8px) scale(0.95);
    opacity: 0;
    pointer-events: none;
    transition: color 0.4s ease, opacity 0.3s ease-out, transform 0.3s ease-out;
}

.site-name-mia.active, .site-name-flashcards.active {
    opacity: 1;
    transform: translateX(-50%) translateY(0) scale(1);
    pointer-events: auto;
}

.site-name-mia span {
    margin-left: 6px; font-weight: 800;
    background: linear-gradient(90deg, hsl(0, 90%, 65%), hsl(60, 90%, 60%), hsl(120, 80%, 60%), hsl(180, 80%, 60%), hsl(240, 80%, 65%), hsl(300, 80%, 65%), hsl(360, 90%, 65%));
    background-size: 300% 100%;
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: rainbow-gradient-anim 6s linear infinite;
}
body.dark-mode .site-name-mia,
body.dark-mode .site-name-flashcards {
    color: var(--cor-texto-escuro);
}


/* --- General Icon Button Styles (shared) --- */
.icon-button {
    background: none; border: none; color: var(--cor-texto-claro);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: background-color 0.4s ease, color 0.4s ease;
    position: relative; overflow: hidden;
    padding: 0;
}
.icon-button:hover:not(.unlock-slider-handle) {
    background-color: var(--cor-hover-menu-claro);
}
body.dark-mode .icon-button:not(.unlock-slider-handle) { color: var(--cor-texto-escuro); }
body.dark-mode .icon-button:hover:not(.unlock-slider-handle) { background-color: var(--cor-hover-menu-escuro); }

.icon-button.night-mode-switch:hover {
    transform: none;
    background-color: transparent;
}
body.dark-mode .icon-button.night-mode-switch:hover {
    background-color: transparent;
}


.icon-button-circle {
    width: clamp(38px, 30px + 2vw, 42px);
    height: clamp(38px, 30px + 2vw, 42px);
    border-radius: 50%;
}
.icon-button-circle i {
    font-size: clamp(1.15rem, 1rem + 0.5vw, 1.3rem);
    line-height: 1;
}


.night-mode-switch {
    width: clamp(38px, 30px + 2vw, 42px);
    height: clamp(38px, 30px + 2vw, 42px);
}
.night-mode-switch-icon {
    width: clamp(20px, 15px + 1.5vw, 24px);
    height: clamp(20px, 15px + 1.5vw, 24px);
    border-radius: 50%;
    position: relative;
    margin: auto;
    background: conic-gradient(
        hsl(0, 90%, 65%) 0deg, hsl(0, 90%, 65%) 51.43deg,
        hsl(35, 90%, 63%) 51.43deg, hsl(35, 90%, 63%) 102.86deg,
        hsl(60, 90%, 60%) 102.86deg, hsl(60, 90%, 60%) 154.29deg,
        hsl(120, 80%, 60%) 154.29deg, hsl(120, 80%, 60%) 205.72deg,
        hsl(180, 80%, 60%) 205.72deg, hsl(180, 80%, 60%) 257.15deg,
        hsl(240, 80%, 65%) 257.15deg, hsl(240, 80%, 65%) 308.58deg,
        hsl(300, 80%, 65%) 308.58deg, hsl(300, 80%, 65%) 360deg
    );
    animation: rotate-segmented-ring 4s linear infinite;
}

.night-mode-switch-icon::after {
    content: '';
    position: absolute;
    width: calc(100% - 6px);
    height: calc(100% - 6px);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--cor-fundo-menu-claro);
    border-radius: 50%;
    z-index: 1;
    transition: background-color 0.4s ease;
}

body.dark-mode .night-mode-switch-icon::after {
    background-color: var(--cor-fundo-menu-escuro);
}

/* --- Unlock Slider Styles --- */
.unlock-slider-track {
    position: relative;
    width: clamp(55px, 45px + 2.5vw, 70px);
    height: clamp(36px, 30px + 1.5vw, 40px);
    display: flex;
    align-items: center;
    border-radius: clamp(18px, 15px + 1vw, 20px);
    background-color: var(--cor-fundo-menu-claro-transparente);
    transition: background-color 0.4s ease;
}
body.dark-mode .unlock-slider-track {
    background-color: var(--cor-fundo-menu-escuro-transparente);
}

.unlock-slider-handle {
    position: absolute;
    right: 3px;
    top: 50%;
    transform: translateY(-50%);
    width: clamp(28px, 22px + 1.5vw, 34px);
    height: clamp(28px, 22px + 1.5vw, 34px);
    border-radius: 50%;
    background-color: var(--cor-fundo-card-claro);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06), 0 6px 22px rgba(0,0,0,0.09);
    cursor: grab;
    touch-action: none;
    z-index: 1;
    transition: right 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), background-color 0.4s ease, box-shadow 0.4s ease;
}
.unlock-slider-handle i {
    font-size: clamp(0.75rem, 0.6rem + 0.5vw, 0.9rem);
    color: var(--cor-texto-claro);
    transition: color 0.4s ease;
}
body.dark-mode .unlock-slider-handle {
    background-color: var(--cor-fundo-card-escuro);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2), 0 6px 25px rgba(0,0,0,0.3);
}
body.dark-mode .unlock-slider-handle i {
    color: var(--cor-texto-escuro);
}

.unlock-slider-handle.grabbing {
    cursor: grabbing !important;
    transition: none;
}


/* --- Main Content Area --- */
main {
    padding-left: clamp(1rem, 0.5rem + 2vw, 2rem);
    padding-right: clamp(1rem, 0.5rem + 2vw, 2rem);
    padding-top: clamp(1.5rem, 1rem + 1vw, 2.5rem);
    padding-bottom: clamp(0.8rem, 0.5rem + 1vw, 1rem);
    max-width: 800px; margin: 0 auto;
    min-height: calc(100vh - clamp(1.5rem, 0.5rem + 2.5vw, 2.5rem) - clamp(6rem, 5rem + 2.5vw, 7rem));
    position: relative;
    z-index: 1;
}


/* --- Flashcard Container (now for Game Selection and Math Game) --- */
.flashcard-container {
    position: fixed;
    left: 50%;
    width: 90vw;
    max-width: 380px; 
    z-index: 500;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    display: flex;
    justify-content: center;
    align-items: flex-end; /* Keeps content aligned to bottom of container */
    bottom: calc(clamp(0.8rem, 0.5rem + 1vw, 1.2rem) + clamp(56px, 50px + 2vw, 64px) + clamp(0.5rem, 0.2rem + 1vw, 1rem));
    transform: translateX(-50%) translateY(20px);
    transition: opacity 0.4s ease-out, visibility 0s linear 0.4s, transform 0.4s ease-out;
}

.flashcard-container.unlocked {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

/* --- Game Selection View --- */
.game-selection-view {
    background-color: var(--cor-fundo-card-claro);
    color: var(--cor-texto-claro);
    border-radius: var(--borda-arredondada);
    box-shadow: 0 3px 8px rgba(0,0,0,0.04), 0 10px 30px rgba(0,0,0,0.08);
    padding: clamp(1.2rem, 1rem + 1vw, 1.8rem) clamp(1rem, 0.8rem + 1vw, 1.5rem);
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(0.8rem, 0.5rem + 1vw, 1.2rem);
    text-align: center;
    animation: card-entry-animation 0.35s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
    transition: background-color 0.4s ease, color 0.4s ease, box-shadow 0.4s ease;
}
body.dark-mode .game-selection-view {
    background-color: var(--cor-fundo-card-escuro);
    color: var(--cor-texto-escuro);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15), 0 12px 35px rgba(0,0,0,0.25);
}

.game-selection-title {
    font-family: var(--fonte-destaque);
    font-size: clamp(1.3rem, 1.1rem + 1vw, 1.6rem);
    font-weight: 700;
    color: var(--cor-texto-claro);
    margin-bottom: clamp(0.3rem, 0.2rem + 0.5vw, 0.6rem);
}
body.dark-mode .game-selection-title {
    color: var(--cor-texto-escuro);
}

.game-selection-buttons {
    display: flex;
    flex-direction: column;
    gap: clamp(0.7rem, 0.5rem + 0.8vw, 1rem);
    width: 100%;
    max-width: 320px; /* Adjust as needed */
}

.game-selection-button { /* Reusing module-button styles */
    display: flex;
    align-items: center;
    background-color: var(--btn-module-light-bg);
    border: 1px solid transparent;
    border-radius: var(--borda-arredondada-pequena);
    padding: clamp(0.7rem, 0.5rem + 0.8vw, 1rem) clamp(0.8rem, 0.6rem + 0.8vw, 1.2rem);
    text-align: left;
    cursor: pointer;
    width: 100%;
    position: relative;
    overflow: hidden;
    transform: translateY(0);
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-module-light-edge-color),
                0 calc(var(--btn-edge-height-static) + 1px) 3px -1px var(--btn-module-light-shadow-color);
    transition: transform var(--btn-transition-duration) ease-out,
                box-shadow var(--btn-transition-duration) ease-out,
                background-color var(--btn-transition-duration) ease-out;
}
body.dark-mode .game-selection-button {
    background-color: var(--btn-module-dark-bg);
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-module-dark-edge-color),
                0 calc(var(--btn-edge-height-static) + 1px) 3px -1px var(--btn-module-dark-shadow-color);
}

.game-selection-button:hover {
    background-color: var(--btn-module-light-hover-bg);
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-module-light-edge-color),
                0 calc(var(--btn-edge-height-static) + 1px) 5px -1px var(--btn-module-light-shadow-color);
}
body.dark-mode .game-selection-button:hover {
    background-color: var(--btn-module-dark-hover-bg);
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-module-dark-edge-color),
                0 calc(var(--btn-edge-height-static) + 1px) 5px -1px var(--btn-module-dark-shadow-color);
}

.game-selection-button:active {
    background-color: var(--btn-module-light-active-bg);
    transform: translateY(var(--btn-translate-y-active-press));
    box-shadow: 0 var(--btn-edge-height-active) 0 var(--btn-module-light-edge-color),
                inset 0 1px 2px var(--btn-module-light-active-inset-shadow);
}
body.dark-mode .game-selection-button:active {
    background-color: var(--btn-module-dark-active-bg);
    box-shadow: 0 var(--btn-edge-height-active) 0 var(--btn-module-dark-edge-color),
                inset 0 1px 2px var(--btn-module-dark-active-inset-shadow);
}

.game-selection-button .button-icon { 
    font-size: clamp(1rem, 0.9rem + 0.4vw, 1.2rem);
    font-weight: normal; 
    color: var(--cor-texto-claro);
    background-color: rgba(0, 0, 0, 0.04);
    margin-right: clamp(0.7rem, 0.5rem + 0.6vw, 1.1rem);
    flex-shrink: 0;
    width: clamp(28px, 24px + 1.2vw, 32px); 
    height: clamp(28px, 24px + 1.2vw, 32px);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
    line-height: 1;
}
body.dark-mode .game-selection-button .button-icon {
    color: var(--cor-texto-escuro);
    background-color: rgba(255, 255, 255, 0.06);
}
.game-selection-button .button-icon i {
    font-size: clamp(1.1rem, 0.95rem + 0.5vw, 1.3rem); 
}


.game-selection-button .button-text { 
    flex-grow: 1;
}
.game-selection-button .button-text strong {
    display: block;
    font-size: clamp(0.95rem, 0.8rem + 0.4vw, 1.05rem);
    font-weight: 600;
    color: var(--cor-texto-claro);
    margin-bottom: 0.1rem;
}
.game-selection-button .button-text span {
    font-size: clamp(0.75rem, 0.7rem + 0.25vw, 0.85rem);
    color: var(--cor-secundaria-claro);
    line-height: 1.3;
}
body.dark-mode .game-selection-button .button-text strong {
    color: var(--cor-texto-escuro);
}
body.dark-mode .game-selection-button .button-text span {
    color: var(--cor-secundaria-escuro);
}

.game-selection-button .button-arrow { 
    font-size: 0.9rem;
    color: var(--cor-secundaria-claro);
    opacity: 0.7;
    margin-left: 0.8rem;
    transition: transform 0.2s ease;
}
body.dark-mode .game-selection-button .button-arrow {
    color: var(--cor-secundaria-escuro);
}


/* --- Math Game & Calculator Styles --- */
.math-game-content {
    background-color: var(--cor-fundo-card-claro);
    color: var(--cor-texto-claro);
    border-radius: var(--borda-arredondada);
    box-shadow: 0 3px 8px rgba(0,0,0,0.04), 0 10px 30px rgba(0,0,0,0.08);
    padding: clamp(1rem, 0.8rem + 1vw, 1.5rem);
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(0.6rem, 0.4rem + 0.8vw, 1rem); /* Adjusted gap */
    text-align: center;
    animation: card-entry-animation 0.35s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
    transition: background-color 0.4s ease, color 0.4s ease, box-shadow 0.4s ease;
}
body.dark-mode .math-game-content {
    background-color: var(--cor-fundo-card-escuro);
    color: var(--cor-texto-escuro);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15), 0 12px 35px rgba(0,0,0,0.25);
}

.math-game-score {
    font-size: clamp(0.85rem, 0.75rem + 0.4vw, 1rem); /* Slightly smaller */
    font-weight: 600;
    color: var(--cor-secundaria-claro);
}
body.dark-mode .math-game-score {
    color: var(--cor-secundaria-escuro);
}

.math-game-display { /* This is for the QUESTION */
    background-color: var(--cor-fundo-menu-claro-transparente);
    padding: clamp(0.6rem, 0.4rem + 0.8vw, 1rem);
    border-radius: var(--borda-arredondada-pequena);
    width: 100%;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
    margin-bottom: clamp(0.2rem, 0.1rem + 0.3vw, 0.4rem);
}
body.dark-mode .math-game-display {
    background-color: var(--cor-fundo-menu-escuro-transparente);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.15);
}

.math-game-question {
    font-size: clamp(1.3rem, 1rem + 1vw, 1.6rem); /* Adjusted size */
    font-weight: 700;
    font-family: var(--fonte-destaque);
    color: var(--cor-texto-claro);
    letter-spacing: 0.5px;
}
body.dark-mode .math-game-question {
    color: var(--cor-texto-escuro);
}

.calculator-input-display {
    width: 100%;
    background-color: var(--calculator-display-light-bg);
    border: 1px solid var(--cor-borda-menu-claro);
    border-radius: var(--borda-arredondada-pequena);
    padding: clamp(0.6rem, 0.5rem + 0.5vw, 0.9rem) clamp(0.8rem, 0.6rem + 0.5vw, 1rem);
    font-size: clamp(1.2rem, 1rem + 0.8vw, 1.5rem);
    font-family: var(--fonte-destaque);
    color: var(--cor-texto-claro);
    text-align: right;
    margin-bottom: clamp(0.6rem, 0.4rem + 0.8vw, 1rem);
    min-height: 2.5em;
    overflow-x: auto;
    white-space: nowrap;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.03);
}
body.dark-mode .calculator-input-display {
    background-color: var(--calculator-display-dark-bg);
    border-color: var(--cor-borda-menu-escuro);
    color: var(--cor-texto-escuro);
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
}


.calculator-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(0.4rem, 0.2rem + 0.8vw, 0.7rem);
    width: 100%;
    user-select: none;
    -webkit-user-select: none;
}

.calculator-button {
    background-color: var(--btn-calculator-light-bg);
    color: var(--btn-calculator-light-text-color);
    border: 1px solid transparent; 
    border-radius: var(--borda-arredondada-pequena);
    padding: clamp(0.8rem, 0.5rem + 1vw, 1.2rem) 0; 
    font-size: clamp(1.1rem, 0.9rem + 0.6vw, 1.4rem);
    font-weight: 600;
    font-family: var(--fonte-principal);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
    position: relative; 
    overflow: hidden; 
    aspect-ratio: 1 / 0.8; 
    box-shadow: 0 2px 0px rgba(0,0,0,0.05); 
}
body.dark-mode .calculator-button {
    background-color: var(--btn-calculator-dark-bg);
    color: var(--btn-calculator-dark-text-color);
    box-shadow: 0 2px 0px rgba(0,0,0,0.15);
}

.calculator-button:hover {
    background-color: var(--btn-calculator-light-hover-bg);
}
body.dark-mode .calculator-button:hover {
    background-color: var(--btn-calculator-dark-hover-bg);
}

.calculator-button:active {
    background-color: var(--btn-calculator-light-active-bg);
    transform: scale(0.96);
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.05);
}
body.dark-mode .calculator-button:active {
    background-color: var(--btn-calculator-dark-active-bg);
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
}

.calculator-button.operator { 
    background-color: var(--btn-calculator-utility-light-bg); 
    color: var(--btn-calculator-utility-light-text-color);
    font-size: clamp(1.2rem, 1rem + 0.8vw, 1.6rem);
}
body.dark-mode .calculator-button.operator {
    background-color: var(--btn-calculator-utility-dark-bg);
    color: var(--btn-calculator-utility-dark-text-color);
}
.calculator-button.operator:hover {
    background-color: var(--btn-calculator-utility-light-hover-bg);
}
body.dark-mode .calculator-button.operator:hover {
    background-color: var(--btn-calculator-utility-dark-hover-bg);
}
.calculator-button.operator:active {
    background-color: var(--btn-calculator-utility-light-active-bg);
}
body.dark-mode .calculator-button.operator:active {
    background-color: var(--btn-calculator-utility-dark-active-bg);
}


.calculator-button.utility {
    background-color: var(--btn-calculator-utility-light-bg);
    color: var(--btn-calculator-utility-light-text-color);
    font-size: clamp(1.3rem, 1.1rem + 0.8vw, 1.7rem); 
}
body.dark-mode .calculator-button.utility {
    background-color: var(--btn-calculator-utility-dark-bg);
    color: var(--btn-calculator-utility-dark-text-color);
}
.calculator-button.utility:hover {
    background-color: var(--btn-calculator-utility-light-hover-bg);
}
body.dark-mode .calculator-button.utility:hover {
    background-color: var(--btn-calculator-utility-dark-hover-bg);
}
.calculator-button.utility:active {
    background-color: var(--btn-calculator-utility-light-active-bg);
}
body.dark-mode .calculator-button.utility:active {
    background-color: var(--btn-calculator-utility-dark-active-bg);
}


.calculator-button.equals {
    background-color: var(--btn-calculator-equals-light-bg);
    color: var(--btn-calculator-equals-light-text-color);
    font-size: clamp(1.3rem, 1.1rem + 0.8vw, 1.7rem);
    aspect-ratio: auto; 
}
body.dark-mode .calculator-button.equals {
    background-color: var(--btn-calculator-equals-dark-bg);
    color: var(--btn-calculator-equals-dark-text-color);
}
.calculator-button.equals:hover {
    background-color: var(--btn-calculator-equals-light-hover-bg);
}
body.dark-mode .calculator-button.equals:hover {
    background-color: var(--btn-calculator-equals-dark-hover-bg);
}
.calculator-button.equals:active {
    background-color: var(--btn-calculator-equals-light-active-bg);
}
body.dark-mode .calculator-button.equals:active {
    background-color: var(--btn-calculator-equals-dark-active-bg);
}

.math-game-feedback {
    min-height: 1.5em; 
    font-size: clamp(0.8rem, 0.7rem + 0.3vw, 0.9rem);
    font-weight: 500;
    margin-top: 0.2rem;
}
.math-game-feedback.correct {
    color: var(--cor-sucesso-claro);
}
body.dark-mode .math-game-feedback.correct {
    color: var(--cor-sucesso-escuro);
}
.math-game-feedback.incorrect {
    color: var(--cor-erro-claro);
}
body.dark-mode .math-game-feedback.incorrect {
    color: var(--cor-erro-escuro);
}


/* --- Wave Effect (Created by JS) --- */
.wave-effect {
    position: absolute; background-color: var(--cor-ripple-claro);
    border-radius: 50%; transform: scale(0); pointer-events: none;
    animation: wave 0.6s ease-out; z-index: 5;
    transition: background-color 0.4s ease;
}
body.dark-mode .wave-effect { background-color: var(--cor-ripple-escuro); }


/* --- Learning Area Section --- */
.learning-area-section {
    text-align: center;
    margin: clamp(1.5rem, 1rem + 2vw, 2.5rem) auto;
    padding: 0 clamp(0.5rem, 0.2rem + 1vw, 1rem);
    max-width: 550px;
    display: flex;
    flex-direction: column;
    gap: clamp(0.7rem, 0.5rem + 0.8vw, 1rem);
}

.learning-area-title {
    font-family: var(--fonte-destaque);
    font-size: clamp(1.4rem, calc(1.1rem + 1vw), 1.8rem);
    font-weight: 700;
    color: var(--cor-texto-claro);
    margin-bottom: clamp(0.5rem, 0.3rem + 0.5vw, 0.8rem);
}
body.dark-mode .learning-area-title {
    color: var(--cor-texto-escuro);
}

/* --- Learning Module Card --- */
.learning-module-card {
    background-color: var(--cor-fundo-card-claro);
    color: var(--cor-texto-claro);
    border: 1px solid var(--cor-borda-menu-claro);
    border-radius: var(--borda-arredondada);
    padding: clamp(0.8rem, 0.6rem + 1vw, 1rem) clamp(1rem, 0.8rem + 0.8vw, 1.2rem);
    width: 100%;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    display: flex;
    align-items: center;
    text-align: left;
    cursor: pointer;
    position: relative;
    transform: translateY(0);
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-learning-card-light-edge-color),
                0 calc(var(--btn-edge-height-static) + 2px) 5px -2px var(--btn-learning-card-light-shadow-color);
    transition: transform var(--btn-transition-duration) ease-out,
                box-shadow var(--btn-transition-duration) ease-out,
                background-color var(--btn-transition-duration) ease-out,
                border-color var(--btn-transition-duration) ease-out;
}
body.dark-mode .learning-module-card {
    background-color: var(--cor-fundo-card-escuro);
    color: var(--cor-texto-escuro);
    border-color: var(--cor-borda-menu-escuro);
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-learning-card-dark-edge-color),
                0 calc(var(--btn-edge-height-static) + 2px) 5px -2px var(--btn-learning-card-dark-shadow-color);
}

.learning-module-card.biology-learning-card,
.learning-module-card.mathematics-learning-card {
    border-color: var(--cor-borda-modulecard-claro);
}
body.dark-mode .learning-module-card.biology-learning-card,
body.dark-mode .learning-module-card.mathematics-learning-card {
    border-color: var(--cor-borda-modulecard-escuro);
}

.learning-module-card:hover {
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-learning-card-light-edge-color),
                0 calc(var(--btn-edge-height-static) + 2px) 8px -2px var(--btn-learning-card-light-shadow-color);
}
body.dark-mode .learning-module-card:hover {
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-learning-card-dark-edge-color),
                0 calc(var(--btn-edge-height-static) + 2px) 8px -2px var(--btn-learning-card-dark-shadow-color);
}

.learning-module-card:active {
    transform: translateY(var(--btn-translate-y-active-press)) scale(1);
    box-shadow: 0 var(--btn-edge-height-active) 0 var(--btn-learning-card-light-edge-color),
                inset 0 1px 2px var(--btn-learning-card-light-active-inset-shadow);
}
body.dark-mode .learning-module-card:active {
     box-shadow: 0 var(--btn-edge-height-active) 0 var(--btn-learning-card-dark-edge-color),
                inset 0 1px 2px var(--btn-learning-card-dark-active-inset-shadow);
}


.learning-module-card-icon-wrapper {
    margin-right: clamp(0.8rem, 0.5rem + 1vw, 1.2rem);
    font-size: clamp(1.4rem, 1.2rem + 0.8vw, 1.8rem);
    color: var(--cor-texto-claro);
    background-color: rgba(0, 0, 0, 0.04);
    flex-shrink: 0;
    width: clamp(38px, 32px + 2vw, 48px);
    height: clamp(38px, 32px + 2vw, 48px);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: var(--borda-arredondada-pequena);
}
body.dark-mode .learning-module-card-icon-wrapper {
    color: var(--cor-texto-escuro);
    background-color: rgba(255, 255, 255, 0.06);
}

.learning-module-card-icon-wrapper i.fa-dna,
.learning-module-card-icon-wrapper i.fa-calculator {
    font-size: clamp(1.5rem, 1.3rem + 0.8vw, 1.9rem);
}


.learning-module-card-text-wrapper {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.learning-module-card-title {
    font-family: var(--fonte-destaque);
    font-size: clamp(1rem, 0.85rem + 0.5vw, 1.2rem);
    font-weight: 600;
    color: var(--cor-texto-claro);
    margin-bottom: 0.15rem;
    line-height: 1.3;
}
body.dark-mode .learning-module-card-title {
    color: var(--cor-texto-escuro);
}

.learning-module-card-subtitle {
    font-size: clamp(0.75rem, 0.7rem + 0.25vw, 0.85rem);
    color: var(--cor-secundaria-claro);
    line-height: 1.4;
}
body.dark-mode .learning-module-card-subtitle {
    color: var(--cor-secundaria-escuro);
}

.learning-module-card-arrow-wrapper {
    font-size: clamp(0.9rem, 0.8rem + 0.4vw, 1.1rem);
    color: var(--cor-secundaria-claro);
    opacity: 0.7;
    margin-left: clamp(0.6rem, 0.4rem + 0.5vw, 1rem);
    transition: transform 0.2s ease;
}
body.dark-mode .learning-module-card-arrow-wrapper {
    color: var(--cor-secundaria-escuro);
}

/* --- Module Separator --- */
.module-separator {
    width: clamp(60%, 50% + 10vw, 70%);
    height: 1px;
    background-color: var(--cor-borda-menu-claro);
    margin: clamp(0.2rem, 0.1rem + 0.5vw, 0.4rem) auto;
    border-radius: 1px;
    transition: background-color 0.4s ease;
}
body.dark-mode .module-separator {
    background-color: var(--cor-borda-menu-escuro);
}


/* --- Generic Module Card Overlay (e.g., Biology, Mathematics) --- */
.module-card-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    z-index: 1500;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0s linear 0.3s;
    padding:
        clamp(1.5rem, 1rem + 1vw, 2rem)
        clamp(0.8rem, 0.5rem + 1vw, 1.5rem)
        calc(clamp(0.8rem, 0.5rem + 1vw, 1.2rem) + clamp(56px, 50px + 2vw, 64px) + clamp(0.5rem, 0.2rem + 1vw, 1.5rem));
    overflow-y: auto;
}
.module-card-overlay.visible {
    opacity: 1;
    visibility: visible;
    transition-delay: 0s;
}

.module-card-content {
    background-color: var(--cor-fundo-card-claro);
    color: var(--cor-texto-claro);
    border-radius: var(--borda-arredondada);
    box-shadow: 0 3px 8px rgba(0,0,0,0.04), 0 10px 30px rgba(0,0,0,0.08);
    width: 100%;
    height: auto;
    max-width: 700px;
    margin: 0 auto;
    overflow: visible;
    padding: clamp(1rem, 0.8rem + 1vw, 1.5rem);
    position: relative;
    display: flex;
    flex-direction: column;
}
body.dark-mode .module-card-content {
    background-color: var(--cor-fundo-card-escuro);
    color: var(--cor-texto-escuro);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15), 0 12px 35px rgba(0,0,0,0.25);
}

/* Title for the Module Selector View */
.module-card-main-title {
    font-family: var(--fonte-destaque);
    font-size: clamp(1.4rem, 1rem + 2vw, 2rem);
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--cor-texto-claro);
    text-align: center;
    flex-shrink: 0;
}
body.dark-mode .module-card-main-title {
    color: var(--cor-texto-escuro);
}

/* Title for an active Lesson View */
.lesson-view-title {
    font-family: var(--fonte-destaque);
    font-size: clamp(1.2rem, 0.9rem + 1.5vw, 1.8rem);
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--cor-texto-claro);
    text-align: center;
    flex-shrink: 0;
}
body.dark-mode .lesson-view-title {
    color: var(--cor-texto-escuro);
}


.module-section-intro {
    text-align: center;
    font-size: clamp(0.85rem, 0.75rem + 0.3vw, 0.95rem);
    color: var(--cor-secundaria-claro);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    flex-shrink: 0;
}
body.dark-mode .module-section-intro {
    color: var(--cor-secundaria-escuro);
}


/* --- Generic Module Views & Module Buttons --- */
.module-view {
    display: none;
    flex-direction: column;
    flex-grow: 1;
    width: 100%;
    overflow-y: visible;
}
.module-view.active-view {
    display: flex;
    animation: fadeInView 0.35s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

.module-buttons-container {
    display: flex;
    flex-direction: column;
    gap: clamp(0.6rem, 0.4rem + 0.5vw, 0.8rem);
    margin-top: 1rem;
    flex-grow: 1;
    overflow-y: visible;
    padding: 0.25rem;
}

.module-button {
    display: flex;
    align-items: center;
    background-color: var(--btn-module-light-bg);
    border: 1px solid transparent;
    border-radius: var(--borda-arredondada-pequena);
    padding: clamp(0.7rem, 0.5rem + 0.8vw, 1rem) clamp(0.8rem, 0.6rem + 0.8vw, 1.2rem);
    text-align: left;
    cursor: pointer;
    width: 100%;
    position: relative;
    overflow: hidden;
    transform: translateY(0);
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-module-light-edge-color),
                0 calc(var(--btn-edge-height-static) + 1px) 3px -1px var(--btn-module-light-shadow-color);
    transition: transform var(--btn-transition-duration) ease-out,
                box-shadow var(--btn-transition-duration) ease-out,
                background-color var(--btn-transition-duration) ease-out;
}
body.dark-mode .module-button {
    background-color: var(--btn-module-dark-bg);
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-module-dark-edge-color),
                0 calc(var(--btn-edge-height-static) + 1px) 3px -1px var(--btn-module-dark-shadow-color);
}

.module-button:hover {
    background-color: var(--btn-module-light-hover-bg);
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-module-light-edge-color),
                0 calc(var(--btn-edge-height-static) + 1px) 5px -1px var(--btn-module-light-shadow-color);
}
body.dark-mode .module-button:hover {
    background-color: var(--btn-module-dark-hover-bg);
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-module-dark-edge-color),
                0 calc(var(--btn-edge-height-static) + 1px) 5px -1px var(--btn-module-dark-shadow-color);
}

.module-button:active {
    background-color: var(--btn-module-light-active-bg);
    transform: translateY(var(--btn-translate-y-active-press));
    box-shadow: 0 var(--btn-edge-height-active) 0 var(--btn-module-light-edge-color),
                inset 0 1px 2px var(--btn-module-light-active-inset-shadow);
}
body.dark-mode .module-button:active {
    background-color: var(--btn-module-dark-active-bg);
    box-shadow: 0 var(--btn-edge-height-active) 0 var(--btn-module-dark-edge-color),
                inset 0 1px 2px var(--btn-module-dark-active-inset-shadow);
}


.module-button .button-icon {
    font-size: clamp(0.9rem, 0.8rem + 0.3vw, 1.1rem);
    font-weight: 600;
    color: var(--cor-texto-claro);
    background-color: rgba(0, 0, 0, 0.04);
    margin-right: clamp(0.6rem, 0.4rem + 0.5vw, 1rem);
    flex-shrink: 0;
    width: clamp(24px, 20px + 1vw, 28px);
    height: clamp(24px, 20px + 1vw, 28px);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
    line-height: 1;
}
body.dark-mode .module-button .button-icon {
    color: var(--cor-texto-escuro);
    background-color: rgba(255, 255, 255, 0.06);
}

.module-button .button-text {
    flex-grow: 1;
}
.module-button .button-text strong {
    display: block;
    font-size: clamp(0.95rem, 0.8rem + 0.4vw, 1.05rem);
    font-weight: 600;
    color: var(--cor-texto-claro);
    margin-bottom: 0.1rem;
}
.module-button .button-text span {
    font-size: clamp(0.75rem, 0.7rem + 0.25vw, 0.85rem);
    color: var(--cor-secundaria-claro);
    line-height: 1.3;
}
body.dark-mode .module-button .button-text strong {
    color: var(--cor-texto-escuro);
}
body.dark-mode .module-button .button-text span {
    color: var(--cor-secundaria-escuro);
}

.module-button .button-arrow {
    font-size: 0.9rem;
    color: var(--cor-secundaria-claro);
    opacity: 0.7;
    margin-left: 0.8rem;
    transition: transform 0.2s ease;
}
body.dark-mode .module-button .button-arrow {
    color: var(--cor-secundaria-escuro);
}

/* Styles for the new module text content area */
.module-text-content {
    padding: 0.5rem clamp(0.2rem, 0.1rem + 0.3vw, 0.7rem) 0 clamp(0.2rem, 0.1rem + 0.3vw, 0.7rem);
    text-align: left;
    line-height: 1.7;
    color: var(--cor-texto-claro);
    font-size: clamp(0.85rem, 0.75rem + 0.3vw, 0.95rem);
}
body.dark-mode .module-text-content {
    color: var(--cor-texto-escuro);
}
.module-text-content p {
    margin-bottom: 1.1em;
}
.module-text-content p:last-child {
    margin-bottom: 0;
}
.module-text-content ul {
    padding-left: 1.5em;
    margin-bottom: 1.1em;
}
.module-text-content li {
    margin-bottom: 0.5em;
}


/* --- Quiz Styles --- */
.quiz-button {
    background-color: var(--btn-quiz-light-bg);
    color: var(--btn-quiz-light-text-color);
    border: 1px solid var(--cor-borda-menu-claro); /* Added a subtle border */
    padding: clamp(0.5rem, 0.4rem + 0.5vw, 0.7rem) clamp(0.8rem, 0.6rem + 0.8vw, 1.2rem);
    border-radius: var(--borda-arredondada-pequena);
    font-size: clamp(0.85rem, 0.75rem + 0.3vw, 0.95rem);
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.1s ease, border-color 0.2s ease;
    text-align: center;
}
body.dark-mode .quiz-button {
    background-color: var(--btn-quiz-dark-bg);
    color: var(--btn-quiz-dark-text-color);
    border-color: var(--cor-borda-menu-escuro);
}
.quiz-button:hover {
    background-color: var(--btn-quiz-light-hover-bg);
    border-color: var(--cor-texto-claro);
}
body.dark-mode .quiz-button:hover {
    background-color: var(--btn-quiz-dark-hover-bg);
    border-color: var(--cor-texto-escuro);
}
.quiz-button:active {
    background-color: var(--btn-quiz-light-active-bg);
    transform: scale(0.98);
}
body.dark-mode .quiz-button:active {
    background-color: var(--btn-quiz-dark-active-bg);
}
.quiz-button i {
    font-size: 1em;
}

.quiz-container {
    padding-top: 1rem;
    border-top: 1px solid var(--cor-borda-innermodule-claro);
    margin-top: 1.5rem;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-bottom: 1rem;
}
body.dark-mode .quiz-container {
    border-top-color: var(--cor-borda-innermodule-escuro);
}

.quiz-question {
    font-size: clamp(1rem, 0.9rem + 0.4vw, 1.1rem);
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--cor-texto-claro);
    line-height: 1.5;
}
body.dark-mode .quiz-question {
    color: var(--cor-texto-escuro);
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 1rem;
}

.quiz-option-button { /* Specific if needed, mostly inherits from .quiz-button */
    width: 100%;
    justify-content: flex-start; /* Align text to left */
    text-align: left;
}
.quiz-option-button.selected-correct {
    background-color: var(--cor-fundo-sucesso-claro);
    color: var(--cor-sucesso-claro) !important; /* Ensure text color override */
    border-color: var(--cor-borda-sucesso-claro) !important;
}
body.dark-mode .quiz-option-button.selected-correct {
    background-color: var(--cor-fundo-sucesso-escuro);
    color: var(--cor-sucesso-escuro) !important;
    border-color: var(--cor-borda-sucesso-escuro) !important;
}
.quiz-option-button.selected-incorrect {
    background-color: var(--cor-fundo-erro-claro);
    color: var(--cor-erro-claro) !important;
    border-color: var(--cor-borda-erro-claro) !important;
}
body.dark-mode .quiz-option-button.selected-incorrect {
    background-color: var(--cor-fundo-erro-escuro);
    color: var(--cor-erro-escuro) !important;
    border-color: var(--cor-borda-erro-escuro) !important;
}
.quiz-option-button.actually-correct { /* For highlighting the true answer if user was wrong */
    outline: 2px solid var(--cor-sucesso-claro);
    outline-offset: -1px; /* Slight inset for better look */
}
body.dark-mode .quiz-option-button.actually-correct {
   outline-color: var(--cor-sucesso-escuro);
}
.quiz-option-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}
.quiz-option-button.selected-correct:disabled,
.quiz-option-button.selected-incorrect:disabled,
.quiz-option-button.actually-correct:disabled {
    opacity: 1; /* Keep full opacity for selected/actual answers */
}


.quiz-feedback {
    font-size: clamp(0.8rem, 0.7rem + 0.3vw, 0.9rem);
    padding: 0.6rem 0.8rem;
    border-radius: var(--borda-arredondada-pequena);
    margin-top: 0.5rem;
    text-align: center;
    width: 100%;
}
.quiz-feedback.correct-feedback { /* Renamed from .quiz-feedback.correct */
    background-color: var(--cor-fundo-sucesso-claro);
    color: var(--cor-sucesso-claro);
    border: 1px solid var(--cor-borda-sucesso-claro);
}
body.dark-mode .quiz-feedback.correct-feedback {
    background-color: var(--cor-fundo-sucesso-escuro);
    color: var(--cor-sucesso-escuro);
    border: 1px solid var(--cor-borda-sucesso-escuro);
}
.quiz-feedback.incorrect-feedback { /* Renamed from .quiz-feedback.incorrect */
    background-color: var(--cor-fundo-erro-claro);
    color: var(--cor-erro-claro);
    border: 1px solid var(--cor-borda-erro-claro);
}
body.dark-mode .quiz-feedback.incorrect-feedback {
    background-color: var(--cor-fundo-erro-escuro);
    color: var(--cor-erro-escuro); /* Corrected from --cor-erro-claro */
    border: 1px solid var(--cor-borda-erro-escuro);
}

.quiz-explanation {
    font-size: clamp(0.8rem, 0.75rem + 0.2vw, 0.9rem);
    color: var(--cor-secundaria-claro);
    margin-top: 0.8rem;
    padding: 0.6rem;
    background-color: rgba(0,0,0,0.02);
    border-radius: var(--borda-arredondada-pequena);
    border: 1px solid var(--cor-borda-innermodule-claro);
    line-height: 1.6;
}
body.dark-mode .quiz-explanation {
    color: var(--cor-secundaria-escuro);
    background-color: rgba(255,255,255,0.02);
    border-color: var(--cor-borda-innermodule-escuro);
}

.quiz-navigation {
    display: flex;
    justify-content: flex-end;
    gap: 0.8rem;
    margin-top: 1rem;
    padding-bottom: 0.5rem;
    width: 100%;
}


/* --- Fill-in-the-Blanks Game Styles --- */
.fill-in-blanks-game {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    align-items: center; 
}

.fill-in-blanks-instructions {
    font-size: clamp(0.9rem, 0.8rem + 0.4vw, 1rem);
    color: var(--cor-secundaria-claro);
    text-align: center;
    margin-bottom: 0.5rem;
}
body.dark-mode .fill-in-blanks-instructions {
    color: var(--cor-secundaria-escuro);
}

.sentence-display-container {
    display: flex;
    flex-direction: column; 
    gap: 0.8rem;
    padding: clamp(0.5rem, 0.4rem + 0.5vw, 0.8rem);
    background-color: rgba(0,0,0,0.02);
    border-radius: var(--borda-arredondada-pequena);
    border: 1px solid var(--cor-borda-innermodule-claro);
    width: 100%;
    margin-bottom: 1rem; 
}
body.dark-mode .sentence-display-container {
    background-color: rgba(255,255,255,0.02);
    border-color: var(--cor-borda-innermodule-escuro);
}

.sentence-display {
    font-size: clamp(1rem, 0.85rem + 0.5vw, 1.15rem);
    line-height: 1.8; 
    color: var(--cor-texto-claro);
    text-align: left;
    display: flex; 
    flex-wrap: wrap; 
    align-items: center; 
    gap: 0.3em; 
}
body.dark-mode .sentence-display {
    color: var(--cor-texto-escuro);
}
.sentence-display > span { 
    display: inline; 
}

.blank-slot {
    display: inline-flex; 
    align-items: center;
    justify-content: center;
    min-width: clamp(60px, 10vw, 100px); 
    height: calc(1em + clamp(8px, 0.5vw + 4px, 12px)); 
    padding: clamp(4px, 0.2vw + 3px, 6px) clamp(6px, 0.3vw + 4px, 8px);
    border: 1.5px dashed var(--cor-secundaria-claro);
    border-radius: var(--borda-arredondada-pequena);
    background-color: rgba(0,0,0,0.03);
    margin: 0 0.1em; 
    vertical-align: middle; 
    transition: border-color 0.2s ease, background-color 0.2s ease, padding 0.2s ease;
    cursor: pointer; /* Add cursor pointer for click interaction */
}
body.dark-mode .blank-slot {
    border-color: var(--cor-secundaria-escuro);
    background-color: rgba(255,255,255,0.04);
}
.blank-slot.drag-over, .blank-slot:hover:not(:has(.word-token)) { /* Add hover for empty slots */
    border-color: var(--cor-foco);
    background-color: rgba(var(--cor-foco-rgb), 0.1);
}

/* Styles for slot when it has a token */
.blank-slot:has(.word-token.placed-in-slot) {
    padding: 0;
    background-color: transparent; /* Slot's own background becomes transparent */
    /* The dashed border and border-radius remain on the slot */
}


.word-pool-container {
    width: 100%;
    padding: clamp(0.6rem, 0.4rem + 0.8vw, 1rem);
    background-color: var(--cor-fundo-menu-claro-transparente);
    border-radius: var(--borda-arredondada-pequena);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
    margin-bottom: 1rem;
}
body.dark-mode .word-pool-container {
    background-color: var(--cor-fundo-menu-escuro-transparente);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.15);
}

.word-pool {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(0.5rem, 0.3rem + 0.8vw, 0.8rem);
    justify-content: center;
    min-height: 40px; 
}

.word-token {
    padding: clamp(0.3rem, 0.2rem + 0.5vw, 0.5rem) clamp(0.6rem, 0.4rem + 0.8vw, 1rem);
    background-color: var(--cor-fundo-card-claro);
    color: var(--cor-texto-claro);
    border: 1px solid var(--cor-borda-innermodule-claro);
    border-radius: var(--borda-arredondada-pequena);
    font-size: clamp(0.85rem, 0.75rem + 0.3vw, 0.95rem);
    font-weight: 500;
    cursor: grab;
    transition: background-color 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease, border-color 0.2s ease,
                width 0.2s ease, height 0.2s ease, padding 0.2s ease, outline 0.2s ease; /* Added outline transition */
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    user-select: none;
    -webkit-user-select: none;
    text-align: center; /* Ensure text is centered by default */
}
body.dark-mode .word-token {
    background-color: var(--cor-fundo-card-escuro);
    color: var(--cor-texto-escuro);
    border-color: var(--cor-borda-innermodule-escuro);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.word-token:hover:not(.selected) { /* Added :not(.selected) to avoid style override */
    background-color: var(--cor-hover-menu-claro);
    border-color: var(--cor-texto-claro);
}
body.dark-mode .word-token:hover:not(.selected) {
    background-color: var(--cor-hover-menu-escuro);
    border-color: var(--cor-texto-escuro);
}
.word-token.dragging {
    opacity: 0.5;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* Style for selected token (click interaction) */
.word-token.selected {
    outline: 2px solid var(--cor-foco);
    outline-offset: 1px;
    box-shadow: 0 0 0 3px rgba(var(--cor-foco-rgb), 0.25), 0 2px 5px rgba(0,0,0,0.15);
    background-color: var(--cor-hover-menu-claro); /* Use hover color for consistency or a specific selection color */
}
body.dark-mode .word-token.selected {
    background-color: var(--cor-hover-menu-escuro);
    box-shadow: 0 0 0 3px rgba(var(--cor-foco-rgb), 0.35), 0 2px 5px rgba(0,0,0,0.25);
}


/* Styles for the token when it's placed in a slot */
.word-token.placed-in-slot {
    width: 100%; /* Fill the width of the slot */
    height: 100%; /* Fill the height of the slot */
    margin: 0;
    /* Token adopts the padding that the blank-slot originally had */
    padding: clamp(4px, 0.2vw + 3px, 6px) clamp(6px, 0.3vw + 4px, 8px);
    border: none; /* Token's own border is removed */
    box-shadow: none; /* Token's own shadow is removed */
    /* background-color, color, border-radius, font-size are inherited from .word-token */
    /* Ensure text is centered within the token */
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab; /* Still grabbable to move out */
}


.fill-in-blanks-feedback { /* Reuses .quiz-feedback structure but adds specific class for targeting */
    font-size: clamp(0.8rem, 0.7rem + 0.3vw, 0.9rem);
    padding: 0.6rem 0.8rem;
    border-radius: var(--borda-arredondada-pequena);
    margin-top: 0.5rem;
    text-align: center;
    width: 100%;
    max-width: 400px; 
}
.fill-in-blanks-feedback.correct-feedback {
    background-color: var(--cor-fundo-sucesso-claro);
    color: var(--cor-sucesso-claro);
    border: 1px solid var(--cor-borda-sucesso-claro);
}
body.dark-mode .fill-in-blanks-feedback.correct-feedback {
    background-color: var(--cor-fundo-sucesso-escuro);
    color: var(--cor-sucesso-escuro);
    border: 1px solid var(--cor-borda-sucesso-escuro);
}
.fill-in-blanks-feedback.incorrect-feedback {
    background-color: var(--cor-fundo-erro-claro);
    color: var(--cor-erro-claro);
    border: 1px solid var(--cor-borda-erro-claro);
}
body.dark-mode .fill-in-blanks-feedback.incorrect-feedback {
    background-color: var(--cor-fundo-erro-escuro);
    color: var(--cor-erro-escuro); /* Corrected */
    border: 1px solid var(--cor-borda-erro-escuro);
}

.fill-in-blanks-navigation { /* Reuses .quiz-navigation structure */
    display: flex;
    justify-content: flex-end; 
    gap: 0.8rem;
    margin-top: 1rem;
    padding-bottom: 0.5rem;
    width: 100%;
}


/* --- Styles for old quiz elements that are being replaced --- */
/* .quiz-question, .quiz-options, .quiz-explanation in HTML will be populated by JS */


/* --- Styles for the "Close Module" button, generalized --- */
.close-module-card-button {
    background-color: var(--btn-close-light-bg);
    color: var(--cor-secundaria-claro);
    border: none;
    padding: clamp(0.5rem, 0.4rem + 0.5vw, 0.6rem) clamp(1rem, 0.8rem + 0.5vw, 1.2rem);
    border-radius: var(--borda-arredondada-pequena);
    font-size: clamp(0.9rem, 0.8rem + 0.3vw, 0.95rem);
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    align-self: center;
    margin-top: auto;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    transform: translateY(0);
    box-shadow: 0 2px 0 var(--btn-close-light-edge-color),
                0 3px 2px -1px var(--btn-close-light-shadow-color);
    transition: transform var(--btn-transition-duration) ease-out,
                box-shadow var(--btn-transition-duration) ease-out,
                background-color var(--btn-transition-duration) ease-out,
                color var(--btn-transition-duration) ease-out;
}
.close-module-card-button i {
    font-size: 1.1em;
}

body.dark-mode .close-module-card-button {
    background-color: var(--btn-close-dark-bg);
    color: var(--cor-secundaria-escuro);
    box-shadow: 0 2px 0 var(--btn-close-dark-edge-color),
                0 3px 2px -1px var(--btn-close-dark-shadow-color);
}

.close-module-card-button:hover {
    background-color: var(--btn-close-light-hover-bg);
    color: var(--cor-texto-claro);
    box-shadow: 0 2px 0 var(--btn-close-light-edge-color),
                0 3px 3px -1px var(--btn-close-light-shadow-color);
}
body.dark-mode .close-module-card-button:hover {
    background-color: var(--btn-close-dark-hover-bg);
    color: var(--cor-texto-escuro);
    box-shadow: 0 2px 0 var(--btn-close-dark-edge-color),
                0 3px 3px -1px var(--btn-close-dark-shadow-color);
}

.close-module-card-button:active {
    background-color: var(--btn-close-light-active-bg);
    color: var(--cor-texto-claro);
    transform: translateY(var(--btn-translate-y-active-press)) scale(1);
    box-shadow: inset 0 1px 1px var(--btn-close-light-active-inset-shadow);
}
body.dark-mode .close-module-card-button:active {
    background-color: var(--btn-close-dark-active-bg);
    color: var(--cor-texto-escuro);
    box-shadow: inset 0 1px 1px var(--btn-close-dark-active-inset-shadow);
}


/* --- Accessibility: Focus Styles --- */
a:focus-visible, button:focus-visible, [role="button"][tabindex="0"]:focus-visible, input:focus-visible,
textarea:focus-visible, select:focus-visible {
    outline: 2px solid var(--cor-foco);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(var(--cor-foco-rgb), 0.2);
}

.icon-button-circle:focus-visible, .night-mode-switch:focus-visible, .unlock-slider-handle:focus-visible {
     outline: 2px solid var(--cor-foco);
     outline-offset: 1px;
     box-shadow: none;
}
.learning-module-card:focus-visible,
.module-button:focus-visible,
.game-selection-button:focus-visible, 
.close-module-card-button:focus-visible,
.quiz-button:focus-visible,
.quiz-option-button:focus-visible, 
.calculator-button:focus-visible,
.word-token:focus-visible, 
.blank-slot:focus-visible,
.word-token.selected:focus-visible  { /* Ensure selected token focus is clear */
     outline: 2px solid var(--cor-foco) !important; /* Ensure override */
     outline-offset: 1px !important;
     box-shadow: 0 0 0 3px rgba(var(--cor-foco-rgb), 0.3) !important;
}


a:focus:not(:focus-visible), button:focus:not(:focus-visible),
[role="button"][tabindex="0"]:focus:not(:focus-visible),
input:focus:not(:focus-visible), textarea:focus:not(:focus-visible),
select:focus:not(:focus-visible),
.icon-button-circle:focus:not(:focus-visible), .night-mode-switch:focus:not(:focus-visible), .unlock-slider-handle:focus:not(:focus-visible),
.learning-module-card:focus:not(:focus-visible),
.module-button:focus:not(:focus-visible),
.game-selection-button:focus:not(:focus-visible), 
.close-module-card-button:focus:not(:focus-visible),
.quiz-button:focus:not(:focus-visible),
.quiz-option-button:focus:not(:focus-visible), 
.calculator-button:focus:not(:focus-visible),
.word-token:focus:not(:focus-visible),
.blank-slot:focus:not(:focus-visible),
.word-token.selected:focus:not(:focus-visible) {
    outline: none;
    box-shadow: none; /* Default for non-focus-visible */
}
/* Re-apply selected styles if it was selected and focused without :focus-visible */
.word-token.selected:focus:not(:focus-visible) {
    outline: 2px solid var(--cor-foco);
    outline-offset: 1px;
    box-shadow: 0 0 0 3px rgba(var(--cor-foco-rgb), 0.25), 0 2px 5px rgba(0,0,0,0.15);
}
body.dark-mode .word-token.selected:focus:not(:focus-visible) {
    box-shadow: 0 0 0 3px rgba(var(--cor-foco-rgb), 0.35), 0 2px 5px rgba(0,0,0,0.25);
}


/* Re-apply 3D shadows for mouse focus if needed */
.learning-module-card:focus:not(:focus-visible) {
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-learning-card-light-edge-color),
                0 calc(var(--btn-edge-height-static) + 2px) 5px -2px var(--btn-learning-card-light-shadow-color);
}
body.dark-mode .learning-module-card:focus:not(:focus-visible) {
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-learning-card-dark-edge-color),
                0 calc(var(--btn-edge-height-static) + 2px) 5px -2px var(--btn-learning-card-dark-shadow-color);
}
.module-button:focus:not(:focus-visible),
.game-selection-button:focus:not(:focus-visible) { 
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-module-light-edge-color),
                0 calc(var(--btn-edge-height-static) + 1px) 3px -1px var(--btn-module-light-shadow-color);
}
body.dark-mode .module-button:focus:not(:focus-visible),
body.dark-mode .game-selection-button:focus:not(:focus-visible) { 
    box-shadow: 0 var(--btn-edge-height-static) 0 var(--btn-module-dark-edge-color),
                0 calc(var(--btn-edge-height-static) + 1px) 3px -1px var(--btn-module-dark-shadow-color);
}
.close-module-card-button:focus:not(:focus-visible) {
    box-shadow: 0 2px 0 var(--btn-close-light-edge-color),
                0 3px 2px -1px var(--btn-close-light-shadow-color);
}
body.dark-mode .close-module-card-button:focus:not(:focus-visible) {
    box-shadow: 0 2px 0 var(--btn-close-dark-edge-color),
                0 3px 2px -1px var(--btn-close-dark-shadow-color);
}
.calculator-button:focus:not(:focus-visible) {
    box-shadow: 0 2px 0px rgba(0,0,0,0.05); 
}
body.dark-mode .calculator-button:focus:not(:focus-visible) {
    box-shadow: 0 2px 0px rgba(0,0,0,0.15);
}


/* --- Responsive Design --- */
@media (max-width: 768px) {
    /* Most styles are fluid via clamp(), specific overrides are minimal */
}

@media (max-width: 480px) {
    /* Most styles are fluid via clamp() */
     .math-game-content, .game-selection-view { 
        padding: clamp(0.8rem, 0.6rem + 1vw, 1.2rem);
    }
    .calculator-input-display {
        font-size: clamp(1.1rem, 0.9rem + 0.7vw, 1.4rem);
        padding: clamp(0.5rem, 0.4rem + 0.5vw, 0.8rem) clamp(0.7rem, 0.5rem + 0.5vw, 0.9rem);
    }
    .calculator-button {
        font-size: clamp(1rem, 0.8rem + 0.5vw, 1.3rem);
    }
    .calculator-button.operator, .calculator-button.equals { 
        font-size: clamp(1.1rem, 0.9rem + 0.7vw, 1.5rem);
    }
     .calculator-button.utility {
        font-size: clamp(1.1rem, 0.9rem + 0.7vw, 1.5rem); 
    }
    .blank-slot {
        min-width: 50px;
    }
    .word-token {
        padding: 0.25rem 0.5rem;
        font-size: 0.8rem;
    }
}

/* --- View Transitions API Styles --- */
::view-transition-old(root), ::view-transition-new(root) {
  animation: none;
  mix-blend-mode: normal;
  transition: background-color 0.4s ease, color 0.4s ease;
}

::view-transition-new(root) {
  background-image: conic-gradient(
    hsl(0, 100%, 50%),
    hsl(39, 100%, 50%),
    hsl(60, 100%, 50%),
    hsl(120, 100%, 50%),
    hsl(240, 100%, 50%),
    hsl(275, 100%, 50%),
    hsl(300, 100%, 50%),
    hsl(0, 100%, 50%)
  );
  animation: reveal-rainbow-circle 1.2s cubic-bezier(0.65, 0, 0.35, 1) forwards;
  z-index: 9999;
}

::view-transition-old(root) {
  z-index: 1;
}

.dark-mode::view-transition-new(root) {
  z-index: 9999;
}
.dark-mode::view-transition-old(root) {
  z-index: 1;
}