/* ========================================
   確率クイズ - スタイルシート
   ======================================== */

:root {
    --bg-primary: #0a0a1a;
    --bg-card: #12122a;
    --bg-card-hover: #1a1a3a;
    --text-primary: #e8e8f0;
    --text-secondary: #9a9ab8;
    --accent: #6c5ce7;
    --accent-glow: rgba(108, 92, 231, 0.3);
    --correct: #00b894;
    --correct-glow: rgba(0, 184, 148, 0.25);
    --wrong: #e17055;
    --wrong-glow: rgba(225, 112, 85, 0.25);
    --border: rgba(255, 255, 255, 0.08);
    --radius: 16px;
    --radius-sm: 10px;
    --font: 'Noto Sans JP', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

#app {
    max-width: 640px;
    margin: 0 auto;
    padding: 20px 16px;
    min-height: 100vh;
}

/* ========================================
   共通コンポーネント
   ======================================== */

.screen {
    display: none;
}

.screen.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hidden {
    display: none !important;
}

.primary-btn {
    display: block;
    width: 100%;
    max-width: 320px;
    margin: 24px auto 0;
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    color: #fff;
    font-family: var(--font);
    font-size: 1.05rem;
    font-weight: 700;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.primary-btn:active {
    transform: translateY(0);
}

.secondary-btn {
    display: block;
    width: 100%;
    max-width: 320px;
    margin: 12px auto 0;
    padding: 14px 32px;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 600;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s;
}

.secondary-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-glow);
}

/* ========================================
   スタート画面
   ======================================== */

.start-hero {
    text-align: center;
    padding: 60px 0 40px;
}

.start-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.start-hero h1 {
    font-size: 1.8rem;
    font-weight: 900;
    background: linear-gradient(135deg, #e8e8f0, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.start-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 32px;
}

.start-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    padding: 8px 14px;
    border-radius: 999px;
    border: 1px solid var(--border);
}

.info-icon {
    font-size: 1rem;
}

/* ========================================
   クイズ画面
   ======================================== */

.quiz-header {
    margin-bottom: 20px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

#question-counter {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent);
}

.progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #a78bfa);
    border-radius: 3px;
    transition: width 0.5s ease;
    width: 0%;
}

.score-display {
    display: flex;
    gap: 16px;
    font-size: 0.9rem;
    font-weight: 600;
}

.score-correct {
    color: var(--correct);
}

.score-wrong {
    color: var(--wrong);
}

/* 問題カード */

.question-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    margin-bottom: 16px;
}

.question-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 4px 12px;
    border-radius: 999px;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.question-text {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.7;
    margin-bottom: 24px;
}

/* 選択肢 */

.choices {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.choice-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
}

.choice-btn:hover:not(.disabled) {
    background: var(--bg-card-hover);
    border-color: rgba(108, 92, 231, 0.4);
    transform: translateX(4px);
}

.choice-label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
}

.choice-btn.correct {
    background: var(--correct-glow);
    border-color: var(--correct);
    pointer-events: none;
}

.choice-btn.correct .choice-label {
    background: var(--correct);
    color: #fff;
}

.choice-btn.wrong {
    background: var(--wrong-glow);
    border-color: var(--wrong);
    pointer-events: none;
}

.choice-btn.wrong .choice-label {
    background: var(--wrong);
    color: #fff;
}

.choice-btn.disabled {
    opacity: 0.4;
    pointer-events: none;
}

/* 解説カード */

.explanation-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    animation: slideUp 0.35s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-icon {
    font-size: 2.4rem;
    text-align: center;
    margin-bottom: 4px;
}

.result-label {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 900;
    margin-bottom: 16px;
}

.result-label.correct {
    color: var(--correct);
}

.result-label.wrong {
    color: var(--wrong);
}

.explanation-text {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.02);
    padding: 16px;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent);
}

/* ========================================
   結果画面
   ======================================== */

.result-hero {
    text-align: center;
    padding: 40px 0;
}

.result-rank-icon {
    font-size: 5rem;
    margin-bottom: 12px;
    animation: popIn 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes popIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.result-rank-title {
    font-size: 1.6rem;
    font-weight: 900;
    margin-bottom: 16px;
}

.result-score-big {
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.result-message {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 32px;
}

.result-breakdown {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 400px;
    margin: 0 auto 16px;
    text-align: left;
}

.breakdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.breakdown-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.breakdown-q {
    flex: 1;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.breakdown-result {
    font-weight: 700;
    flex-shrink: 0;
}

.breakdown-result.correct {
    color: var(--correct);
}

.breakdown-result.wrong {
    color: var(--wrong);
}

/* ========================================
   ランク別の色
   ======================================== */

.rank-s .result-rank-title {
    background: linear-gradient(135deg, #ffd700, #ffaa00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.rank-a .result-rank-title {
    color: var(--correct);
}

.rank-b .result-rank-title {
    color: #a78bfa;
}

.rank-c .result-rank-title {
    color: var(--text-secondary);
}

.rank-d .result-rank-title {
    color: var(--wrong);
}

/* ========================================
   レスポンシブ
   ======================================== */

@media (max-width: 480px) {
    #app {
        padding: 16px 12px;
    }

    .start-hero {
        padding: 40px 0 30px;
    }

    .start-hero h1 {
        font-size: 1.5rem;
    }

    .start-info {
        gap: 8px;
    }

    .info-item {
        font-size: 0.8rem;
        padding: 6px 10px;
    }

    .question-card {
        padding: 20px 16px;
    }

    .question-text {
        font-size: 1rem;
    }

    .choice-btn {
        padding: 12px 14px;
        font-size: 0.9rem;
    }

    .result-score-big {
        font-size: 2.4rem;
    }
}