:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --text-primary: #ecf0f1;
    --accent-color: #27ae60;
    --panel-bg: #0f1720;
    --button-bg: #21262d;
    --button-hover: #30363d;
}

body.theme-light {
    --bg-color: #f6f7fb;
    --card-bg: #ffffff;
    --text-primary: #111827;
    --accent-color: #2563eb;
    --panel-bg: #f8fafc;
    --button-bg: #e2e8f0;
    --button-hover: #cbd5e1;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.screen {
    display: none;
    width: 100%;
    max-width: 540px;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    text-align: center;
}

.screen.active { display: flex; }

/* Loader */
.main-logo { width: 180px; margin-bottom: 20px; }
.anim-pulse { animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }
.charging-bar { width: 200px; height: 6px; background: #21262d; border-radius: 10px; overflow: hidden; }
.progress { width: 0%; height: 100%; background: var(--accent-color); animation: fill 3s forwards; }
@keyframes fill { to { width: 100%; } }

/* Start screen */
.intro-text, .hint-text { max-width: 420px; margin: 0 auto 20px; line-height: 1.6; color: rgba(236, 240, 241, 0.85); }
.mode-row { display: flex; gap: 12px; width: 100%; flex-wrap: wrap; justify-content: center; margin-bottom: 15px; }
.mode-button, .select-theme {
    flex: 1 1 180px;
    border: none;
    border-radius: 14px;
    padding: 14px 18px;
    cursor: pointer;
    background: var(--button-bg);
    color: var(--text-primary);
    font-size: 16px;
    transition: transform 0.2s, background 0.2s;
}
.mode-button:hover, .select-theme:hover { transform: translateY(-2px); background: var(--button-hover); }

/* Cards */
.mini-logo { width: 70px; margin-bottom: 10px; }
.highlight { color: var(--accent-color); }
.grid-languages { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; width: 100%; }
.card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 15px;
    cursor: pointer;
    border: 2px solid #30363d;
    transition: 0.3s;
}
.card:hover { transform: translateY(-5px); border-color: var(--lang-color); }
.card img { width: 50px; margin-bottom: 10px; }

/* Quiz */
.quiz-header { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; width: 100%; margin-bottom: 15px; align-items: center; }
.quiz-header .timer-box, .quiz-header .score-badge { justify-self: stretch; }
.timer-box { background: #e74c3c; padding: 10px 16px; border-radius: 20px; font-weight: bold; }
.score-badge { background: var(--accent-color); padding: 10px 16px; border-radius: 20px; font-weight: bold; }
.game-mode-box { background: var(--panel-bg); padding: 10px 16px; border-radius: 20px; font-weight: 600; justify-self: stretch; }
.question-box { background: var(--card-bg); width: 100%; padding: 25px; border-radius: 20px; }
.options-grid { display: grid; gap: 14px; margin-top: 20px; }
.option-btn {
    background: var(--button-bg);
    border: 1px solid #3f4954;
    color: var(--text-primary);
    padding: 15px;
    border-radius: 14px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}
.option-btn:hover { background: var(--button-hover); }
.option-btn.correct-answer { background: #27ae60; color: white; border-color: #2ecc71; }
.option-btn.wrong-answer { background: #e74c3c; color: white; border-color: #c0392b; }

.duel-container { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.player-panel { background: var(--panel-bg); border-radius: 18px; padding: 18px; display: flex; flex-direction: column; gap: 10px; }
.player-title { font-size: 16px; font-weight: 700; margin-bottom: 4px; color: var(--accent-color); }
.player-score { background: var(--accent-color); color: white; padding: 8px 14px; border-radius: 16px; font-weight: bold; }

/* Resultat */
.final-score-box { font-size: 44px; font-weight: bold; color: var(--accent-color); margin: 20px 0; }
.result-actions { display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; margin-top: 20px; }
.retry-btn, .back-btn { border: none; color: white; padding: 14px 24px; border-radius: 12px; cursor: pointer; font-size: 18px; }
.retry-btn { background: var(--accent-color); }
.back-btn { background: #495057; }

@keyframes shake {
    0% { transform: translateX(0); }
    25% { transform: translateX(5px); }
    50% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
    100% { transform: translateX(0); }
}

.timer-low {
    animation: shake 0.2s infinite;
    background: #ff0000 !important;
}
.install-banner {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--panel-bg);
    border: 2px solid var(--accent-color);
    padding: 15px 20px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
    width: 90%;
    max-width: 400px;
}

.install-banner p { margin: 0; font-size: 14px; }

#btn-install {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
}

.hidden { display: none !important; }

.brandon{
    position: absolute;
    left: 50%;
    bottom: 20px;
    transform: translateX(-50%);
    width: calc(100% - 40px);
    max-width: 500px;
    margin: 0;
    text-align: center;
    color: rgba(148, 163, 184, 0.8);
}
.card:hover { transform: translateY(-5px); border-color: var(--lang-color); }
.card img { width: 50px; margin-bottom: 10px; }

/* Quiz */
.quiz-header { display: flex; justify-content: space-between; width: 100%; margin-bottom: 15px; }
.timer-box { background: #e74c3c; padding: 8px 15px; border-radius: 20px; font-weight: bold; }
.score-badge { background: var(--accent-color); padding: 8px 15px; border-radius: 20px; font-weight: bold; }
.question-box { background: var(--card-bg); width: 100%; padding: 25px; border-radius: 20px; }
.options-grid { display: grid; gap: 10px; margin-top: 20px; }
.option-btn {
    background: #21262d; border: 1px solid #30363d; color: white;
    padding: 15px; border-radius: 10px; cursor: pointer; text-align: left;
}
.option-btn:hover { background: #30363d; }

/* Resultat */
.final-score-box { font-size: 48px; font-weight: bold; color: var(--accent-color); margin: 20px 0; }
.result-actions { display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; margin-top: 20px; }
.retry-btn, .back-btn { border: none; color: white; padding: 12px 24px; border-radius: 10px; cursor: pointer; font-size: 18px; }
.retry-btn { background: var(--accent-color); }
.back-btn { background: #495057; }
/* Dans style.css */
@keyframes shake {
    0% { transform: translateX(0); }
    25% { transform: translateX(5px); }
    50% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
    100% { transform: translateX(0); }
}

.timer-low {
    animation: shake 0.2s infinite;
    background: #ff0000 !important;
}
.install-banner {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: #1c2128;
    border: 2px solid var(--accent-color);
    padding: 15px 20px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    width: 90%;
    max-width: 400px;
}

.install-banner p { margin: 0; font-size: 14px; }

#btn-install {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
}

.hidden { display: none !important; }

.brandon{
    position: absolute;
    left: 50%;
    bottom: 20px;
    transform: translateX(-50%);
    width: calc(100% - 40px);
    max-width: 500px;
    margin: 0;
    text-align: center;
    color: #94a3b8;
}