/* ========== VARIÁVEIS DE DESIGN ========== */
:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --dark-color-base: #0f172a;
    --light-color-base: #f8fafc;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-600: #4b5563;
    --gray-800: #1f2937;
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    --font-primary: 'Inter', sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    --border-radius: 16px;
    --border-radius-lg: 24px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    --main-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --text-color: var(--dark-color-base);
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-border: rgba(255, 255, 255, 0.2);
    --card-text-color: var(--dark-color-base);
    --card-text-secondary-color: var(--gray-600);
    --card-item-bg: white;
    --card-item-border: var(--gray-200);
}

body.dark-mode {
    --main-bg: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --text-color: var(--light-color-base);
    --card-bg: rgba(30, 41, 59, 0.8);
    --card-border: rgba(255, 255, 255, 0.3);
    --card-text-color: var(--light-color-base);
    --card-text-secondary-color: var(--gray-300);
    --card-item-bg: var(--gray-800);
    --card-item-border: var(--gray-600);
    --gray-600: var(--gray-300);
    --gray-200: var(--gray-800);
}

/* ========== RESET E BASE ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-color);
    background: var(--main-bg);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========== SEÇÕES ========== */
section {
    padding: 5rem 0;
    display: none;
    position: relative;
}

section.active-section {
    display: block;
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

section h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: white;
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    text-shadow: 0 4px 8px rgba(0,0,0,0.3);
    line-height: 1.2;
}

.hidden { display: none !important; }

/* ========== COMPONENTES GLOBAIS ========== */
.btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-lg);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.btn:hover::before { left: 100%; }
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-xl); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-secondary { background: transparent; border: 2px solid white; color: white; }
.btn-secondary:hover { background: white; color: var(--primary-color); }

.centered-container { text-align: center; margin-top: 2rem; }
.button-group { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.result-box { text-align: center; margin-top: 2rem; padding: 2rem; background: var(--card-bg); border-radius: var(--border-radius); backdrop-filter: blur(20px); }

/* ========== NAVEGAÇÃO ========== */
nav {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

nav ul {
    display: flex;
    list-style: none;
    justify-content: center;
    flex-wrap: wrap;
    padding: 0.5rem 0;
}

nav a {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    border-radius: var(--border-radius);
    margin: 0 0.25rem;
}

nav a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
    border-radius: 2px;
}

nav a:hover::before,
nav a.active::before { width: 80%; }
nav a:hover { color: var(--primary-color); background: rgba(99, 102, 241, 0.1); }
nav i { margin-right: 8px; font-size: 1.1rem; }

/* ========== SEÇÃO HOME ========== */
#typing-text {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}
#typing-text::after {
    content: '|';
    position: absolute;
    right: -10px;
    animation: blink 0.7s infinite;
    color: var(--accent-color);
}
@keyframes blink {
    50% { opacity: 0; }
}

.intro-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.intro-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-xl);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.intro-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.8s;
}

.intro-card:hover::before { left: 100%; }
.intro-card:hover { transform: translateY(-10px) scale(1.02); box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); }

.intro-card .icon, .stat-card .icon, .poll-question .icon {
    width: 80px; height: 80px; margin: 0 auto 1.5rem;
    background: var(--gradient-primary); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 2rem; color: white; box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease-out; /* For parallax */
}

.intro-card h3 {
    color: var(--card-text-color); font-family: var(--font-display);
    font-size: 1.5rem; margin-bottom: 1rem; font-weight: 700;
}

.intro-card p { color: var(--card-text-secondary-color); line-height: 1.6; }

/* ========== SEÇÃO SOBRE ========== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: start;
}

.about-text {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-xl);
}

.about-text h3 { font-family: var(--font-display); font-size: 2rem; margin-bottom: 1.5rem; color: var(--card-text-color); }
.about-text p { margin-bottom: 1.5rem; color: var(--card-text-secondary-color); font-size: 1.1rem; line-height: 1.7; }

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    perspective: 1200px;
}

.feature-card {
    background-color: transparent;
    cursor: pointer;
    border-radius: var(--border-radius);
    aspect-ratio: 1/1;
    transform-style: preserve-3d;
    transition: transform 0.7s cubic-bezier(0.4, 0.2, 0.2, 1);
}

.feature-card.flipped {
    transform: rotateY(180deg);
}

.feature-front, .feature-back {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: var(--border-radius);
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
    box-shadow: var(--shadow-xl);
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
}

.feature-front .feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}
.feature-front h4 {
    font-size: 1.2rem;
    font-family: var(--font-display);
    color: var(--card-text-color);
}

.feature-back {
    transform: rotateY(180deg);
    font-size: 0.95rem;
    color: var(--card-text-secondary-color);
}

/* ========== SEÇÃO QUIZZES ========== */
.quiz-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 2rem; margin-bottom: 3rem; }

.quiz-card {
    background: var(--card-bg); backdrop-filter: blur(20px); border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg); padding: 2.5rem; cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); position: relative; overflow: hidden; box-shadow: var(--shadow-xl);
}

.quiz-card::before {
    content: ''; position: absolute; inset: 0;
    background: var(--gradient-primary); opacity: 0; transition: opacity 0.3s ease;
}

.quiz-card:hover::before { opacity: 0.1; }
.quiz-card:hover { transform: translateY(-8px); box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); }

.quiz-card h3, .quiz-card p, .quiz-meta { position: relative; z-index: 2; }
.quiz-card h3 { font-family: var(--font-display); font-size: 1.5rem; margin-bottom: 1rem; color: var(--card-text-color); }
.quiz-card p { color: var(--card-text-secondary-color); margin-bottom: 1.5rem; }

.difficulty {
    position: absolute; top: 20px; right: 20px;
    padding: 6px 12px; border-radius: 20px; font-size: 12px; font-weight: 700;
    color: white; text-transform: uppercase; letter-spacing: 0.5px; z-index: 3;
}

.easy { background-color: var(--success-color); }
.medium { background-color: var(--warning-color); }
.hard { background-color: var(--error-color); }

.quiz-meta { display: flex; justify-content: space-between; align-items: center; }
.quiz-info { display: flex; gap: 1rem; font-size: 0.9rem; color: var(--card-text-secondary-color); }

/* ========== TELA DO QUIZ ========== */
#quiz-screen {
    background: var(--card-bg); backdrop-filter: blur(20px); border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg); padding: 3rem; box-shadow: var(--shadow-xl); max-width: 900px; margin: 2rem auto;
}

.quiz-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 2rem; padding-bottom: 1rem; border-bottom: 2px solid var(--card-item-border);
}

.quiz-progress-container { text-align: right; }
.progress-bar { width: 250px; height: 12px; background-color: var(--card-item-border); border-radius: 6px; margin-top: 8px; overflow: hidden; box-shadow: inset 0 2px 4px rgba(0,0,0,0.1); }
.progress-fill { height: 100%; border-radius: 6px; background: var(--gradient-primary); width: 0%; transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1); }

.quiz-question { font-size: 1.4rem; margin-bottom: 2.5rem; font-weight: 600; color: var(--card-text-color); line-height: 1.6; }
.quiz-options { display: grid; grid-template-columns: 1fr; gap: 1rem; margin-bottom: 2rem; }

.quiz-option {
    padding: 1.5rem; background-color: var(--card-item-bg); border: 2px solid var(--card-item-border);
    border-radius: var(--border-radius); cursor: pointer; transition: all 0.3s ease;
    font-weight: 500; position: relative; overflow: hidden; color: var(--card-text-color);
}

.quiz-option::before {
    content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.5s;
}

.quiz-option:hover::before { left: 100%; }
.quiz-option:hover { border-color: var(--primary-color); background-color: rgba(99, 102, 241, 0.05); transform: translateX(5px); }

.quiz-option.selected { border-color: var(--primary-color); background-color: rgba(99, 102, 241, 0.1); font-weight: 600; }
.quiz-option.correct { background-color: var(--success-color) !important; color: white; border-color: var(--success-color) !important; }
.quiz-option.incorrect { background-color: var(--error-color) !important; color: white; border-color: var(--error-color) !important; }

#quiz-result { text-align: center; margin-top: 3rem; }
#quiz-feedback-icon { font-size: 4rem; margin-bottom: 1rem; }
#quiz-score { font-size: 2.5rem; color: var(--primary-color); font-weight: 800; font-family: var(--font-display); margin-bottom: 1rem; }
#quiz-feedback { font-size: 1.3rem; margin-bottom: 2rem; color: var(--card-text-secondary-color); }

/* ... (Manter todo o CSS até a seção do Jogo da Memória) ... */
/* ========== JOGO DA MEMÓRIA ========== */
.memory-game-container {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-xl);
    max-width: 900px;
    margin: 0 auto;
}
.memory-game-controls {
    text-align: center;
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.difficulty-selector {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.difficulty-selector span {
    font-weight: 600;
    color: var(--card-text-color);
}
.btn-small {
    padding: 8px 16px;
    font-size: 14px;
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}
.btn-small.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}
.memory-stats { 
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}
.memory-stat { text-align: center; }
.memory-stat .label { 
    font-size: 0.9rem;
    color: var(--card-text-secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.memory-stat .value { 
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: var(--font-display);
}
.game-actions {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}
.highscore-display {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--card-text-color);
}
.highscore-display .fa-trophy {
    color: var(--warning-color);
    margin-right: 8px;
}
.btn-peek {
    border-color: var(--accent-color);
    color: var(--accent-color);
}
.btn-peek:hover {
    background: var(--accent-color);
    color: white;
}
.btn-peek:disabled {
    border-color: var(--gray-300);
    color: var(--gray-300);
    background: transparent;
    opacity: 0.6;
    cursor: not-allowed;
}
.btn-peek:disabled:hover {
    transform: none;
    box-shadow: var(--shadow-lg);
}
.memory-board-wrapper {
    position: relative;
}
.memory-board { 
    display: grid;
    grid-template-columns: repeat(var(--grid-cols, 4), 1fr);
    gap: 1rem;
    max-width: 700px;
    margin: 0 auto;
    perspective: 1000px; 
}
.memory-card {
    aspect-ratio: 1;
    border-radius: var(--border-radius);
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-lg);
}
.memory-card.flip { transform: rotateY(180deg); }
.memory-card.shake {
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}
@keyframes shake {
  10%, 90% { transform: translate3d(-1px, 0, 0) rotateY(180deg); }
  20%, 80% { transform: translate3d(2px, 0, 0) rotateY(180deg); }
  30%, 50%, 70% { transform: translate3d(-4px, 0, 0) rotateY(180deg); }
  40%, 60% { transform: translate3d(4px, 0, 0) rotateY(180deg); }
}
.memory-card.matched { 
    opacity: 0.6;
    cursor: default;
    transform: scale(0.95);
}
.memory-card.pulse {
    animation: pulse-match 0.5s ease-in-out;
}
@keyframes pulse-match {
    0% { transform: scale(1) rotateY(180deg); }
    50% { transform: scale(1.1) rotateY(180deg); }
    100% { transform: scale(1) rotateY(180deg); }
}
.memory-card .front-face, .memory-card .back-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    box-shadow: var(--shadow-lg);
}
.memory-card .front-face { 
    background: var(--gradient-primary);
    color: white;
}
.memory-card .back-face {
    background: var(--card-item-bg);
    color: var(--primary-color);
    transform: rotateY(180deg);
    border: 2px solid var(--card-item-border);
}
#memory-result {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10;
}
#memory-result h3 { color: var(--primary-color); font-size: 2rem; margin-bottom: 1rem; }
#memory-final-stats { font-size: 1.2rem; margin-bottom: 2rem; color: var(--card-text-secondary-color); }

/* ========== SEÇÃO ESTATÍSTICAS ========== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; margin-bottom: 4rem; align-items: stretch; }

.stat-card {
    background: var(--card-bg); backdrop-filter: blur(20px); border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg); padding: 2.5rem; text-align: center;
    box-shadow: var(--shadow-xl); transition: all 0.3s ease;
    display: flex; flex-direction: column; justify-content: center;
}

.stat-card:hover { transform: translateY(-5px); }
.stat-card h3 { font-family: var(--font-display); font-size: 3rem; font-weight: 800; color: var(--primary-color); margin-bottom: 0.5rem; }
.stat-card p { color: var(--card-text-secondary-color); font-size: 1.1rem; }

.chart-container {
    background: var(--card-bg); backdrop-filter: blur(20px); border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg); padding: 2rem; margin-top: 3rem;
    position: relative;
}
.chart-container h3 { text-align: center; font-family: var(--font-display); font-size: 1.5rem; margin-bottom: 2rem; color: var(--card-text-color); }
.chart-bar {
    width: var(--bar-value, 0%);
    background-color: var(--bar-color, var(--primary-color));
    margin-bottom: 1rem; padding: 0.8rem; border-radius: 0 var(--border-radius) var(--border-radius) 0;
    color: white; font-weight: 600; white-space: nowrap;
    animation: slideIn 1s ease-out;
    cursor: pointer;
    transition: filter 0.3s ease;
}
.chart-bar:hover {
    filter: brightness(1.2);
}
.chart-bar span { margin-left: 10px; }
@keyframes slideIn { from { width: 0; } }

#chart-tooltip {
    position: absolute;
    background: var(--dark-color-base);
    color: white;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    z-index: 10;
    pointer-events: none;
    opacity: 0;
    transform: translate(-50%, -100%);
    transition: opacity 0.2s ease;
}

/* ========== FOOTER ========== */
footer { background: var(--dark-color-base); color: white; padding: 4rem 0 2rem; margin-top: 5rem; }
.footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 3rem; margin-bottom: 2rem; }
.footer-section h3 { font-family: var(--font-display); font-size: 1.5rem; margin-bottom: 1.5rem; color: var(--primary-color); }
.footer-section p, .footer-section a { color: var(--gray-300); text-decoration: none; line-height: 1.6; transition: color 0.3s ease; }
.footer-section a:hover { color: var(--primary-color); }
.contact-email { margin-top: 1rem; color: var(--primary-color); }
.social-links { display: flex; gap: 1rem; margin-top: 1rem; }
.social-links a {
    width: 50px; height: 50px; background: var(--gradient-primary); border-radius: 50%;
    display: flex; align-items: center; justify-content: center; font-size: 1.5rem; transition: all 0.3s ease; color: white;
}
.social-links a:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.footer-bottom { text-align: center; padding-top: 2rem; border-top: 1px solid var(--gray-800); color: var(--gray-300); }

/* ========== NOVOS ESTILOS INTERATIVOS ========== */
.cursor-follower {
    width: 30px;
    height: 30px;
    background-color: var(--accent-color);
    border-radius: 50%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    mix-blend-mode: overlay;
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), width 0.3s, height 0.3s, opacity 0.3s;
    transform: translate(-50%, -50%);
}
body:hover .cursor-follower { opacity: 0.5; }
.cursor-follower.hover-effect {
    width: 50px;
    height: 50px;
    opacity: 0.3;
}
@media (hover: none) { .cursor-follower { display: none; } }

.stat-poll-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1.5rem;
}
.poll-question h4 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--card-text-color);
    line-height: 1.4;
}
.poll-options {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.poll-option {
    background: var(--gradient-primary);
}
.poll-option.correct {
    background: var(--success-color);
    transform: scale(1.1);
    box-shadow: 0 0 20px var(--success-color);
}
.poll-option.incorrect {
    background: var(--error-color);
    opacity: 0.7;
}
.poll-result h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-family: var(--font-display);
}
.poll-result p {
    color: var(--card-text-secondary-color);
    font-size: 1rem;
}
.confetti {
    position: fixed;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 10000;
    will-change: transform;
}

/* ========== RESPONSIVIDADE ========== */
@media screen and (max-width: 1024px) {
    .about-content { grid-template-columns: 1fr; gap: 2rem; }
}

@media screen and (max-width: 768px) {
    section { padding: 3rem 0; }
    section h2 { font-size: 2.5rem; }
    nav ul { justify-content: space-around; }
    nav a { padding: 0.8rem 1rem; font-size: 0.9rem; }
    .footer-content { grid-template-columns: 1fr; gap: 2rem; }
    .quiz-header { flex-direction: column; gap: 1rem; text-align: center; }
    .progress-bar { width: 100%; }
    .about-features { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
    .memory-board { gap: 0.75rem; }
}

@media screen and (max-width: 600px) {
    .stats-grid { grid-template-columns: 1fr; }
    .memory-board { --grid-cols: 4 !important; } /* Forçar 4 colunas em telas menores para hard/normal */
}

@media screen and (max-width: 480px) {
    .container { width: 95%; padding: 0 10px; }
    section { padding: 2rem 0; }
    .quiz-container, .intro-grid { grid-template-columns: 1fr; }
    #quiz-screen { padding: 2rem; }
    nav ul { gap: 0.5rem; }
    nav a { padding: 0.6rem 0.8rem; font-size: 0.8rem; }
    nav i { display: none; }
}

/* ========== ANIMAÇÕES E ACESSIBILIDADE ========== */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}
.pulse { animation: pulse 2s infinite; }

.theme-toggle {
    position: fixed; top: 20px; right: 20px; z-index: 9999;
    background: var(--card-bg); backdrop-filter: blur(20px); border: 1px solid var(--card-border);
    border-radius: 50px; padding: 10px; cursor: pointer; transition: all 0.3s ease; box-shadow: var(--shadow-lg);
}
.theme-toggle:hover { transform: scale(1.1); }
.theme-toggle i { font-size: 1.2rem; color: var(--primary-color); }

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}