/* ============================================
   ことわざクイズ - style.css
   📜 和風×知的テーマ
   ============================================ */

:root {
    --primary: #6B4423;
    --primary-dark: #4A2F18;
    --secondary: #D4AF37;
    --accent: #8B4513;
    --bg-dark: #1A1510;
    --bg-card: rgba(30, 25, 20, 0.95);
    --bg-gradient: radial-gradient(ellipse at center, #2D2520 0%, #1A1510 60%, #0D0A08 100%);
    --text: #FFF8E7;
    --text-muted: #B8A890;
    --shadow: 0 8px 32px rgba(107, 68, 35, 0.3);
    --glow: 0 0 20px rgba(212, 175, 55, 0.3);
    --radius: 12px;
    --font: 'M PLUS Rounded 1c', sans-serif;

    /* 正解・不正解 */
    --correct: #4CAF50;
    --wrong: #f44336;
}

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

body {
    font-family: var(--font);
    background: var(--bg-gradient);
    min-height: 100vh;
    min-height: 100dvh;
    color: var(--text);
    overflow-x: hidden;
    touch-action: manipulation;
}

/* 和紙テクスチャ風背景 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(212, 175, 55, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 69, 19, 0.05) 0%, transparent 40%);
    pointer-events: none;
    z-index: 0;
}

/* ============ 共通コンポーネント ============ */
.screen {
    display: none;
    min-height: 100vh;
    min-height: 100dvh;
    padding: 2rem 1rem;
    position: relative;
    z-index: 1;
}

.screen.active {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.5s ease;
    padding-bottom: max(2rem, env(safe-area-inset-bottom));
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.container {
    background: var(--bg-card);
    border: 2px solid var(--primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    width: 100%;
    max-width: 500px;
    text-align: center;
    position: relative;
}

.btn-mode:focus-visible,
.btn-config:focus-visible,
.btn-count:focus-visible,
.choice-btn:focus-visible,
.fillin-input:focus-visible,
.btn-hint:focus-visible,
.btn-submit:focus-visible,
.btn-quit:focus-visible,
.btn-review:focus-visible,
.btn-retry:focus-visible,
.btn-home:focus-visible,
.back-link:focus-visible {
    outline: 3px solid var(--secondary);
    outline-offset: 3px;
}

/* ============ タイトル ============ */
.title {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--secondary);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* ============ モード選択 ============ */
.mode-select h2 {
    font-size: 1.2rem;
    color: var(--text);
    margin-bottom: 1rem;
}

.btn-mode {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    padding: 1.2rem;
    margin-bottom: 1rem;
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: 2px solid var(--secondary);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-mode:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow);
}

.mode-icon {
    font-size: 2rem;
    margin-bottom: 0.3rem;
}

.mode-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
}

.mode-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============ 問題数選択 ============ */
/* ============ 設定エリア (Phase 2.3) ============ */
.config-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(212, 175, 55, 0.2);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.config-group h3 {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
}

.config-buttons {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-config,
.btn-count {
    padding: 0.4rem 0.8rem;
    background: transparent;
    border: 1px solid var(--primary);
    border-radius: 20px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font);
    font-size: 0.85rem;
}

.btn-config:hover,
.btn-count:hover,
.btn-config.active,
.btn-count.active {
    background: var(--primary);
    border-color: var(--secondary);
    color: var(--text);
    box-shadow: 0 0 8px rgba(212, 175, 55, 0.2);
}

/* ============ 戻るリンク ============ */
.back-link {
    display: inline-block;
    margin-top: 1.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: var(--secondary);
}

/* ============ ゲーム画面 ============ */
.game-container {
    max-width: 600px;
    position: relative;
}

/* 中断ボタン */
.btn-quit {
    position: absolute;
    top: -40px;
    right: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid var(--text-muted);
    color: var(--text-muted);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-quit:hover {
    background: var(--wrong);
    border-color: var(--wrong);
    color: white;
    transform: rotate(90deg);
}

/* 進捗バー */
.progress-bar {
    position: relative;
    height: 30px;
    background: rgba(107, 68, 35, 0.3);
    border-radius: 15px;
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 15px;
    transition: width 0.5s ease;
    width: 5%;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* 問題エリア */
.question-area {
    background: rgba(212, 175, 55, 0.1);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

/* 問題ヘッダー（難易度バッジ＋キーボードヒント） */
.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.8rem;
}

.difficulty-badge {
    font-size: 0.8rem;
    font-weight: 700;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    background: var(--primary);
    color: var(--secondary);
    border: 1px solid var(--secondary);
}

.difficulty-badge.level-1 {
    background: rgba(76, 175, 80, 0.2);
    border-color: #4CAF50;
    color: #4CAF50;
}

.difficulty-badge.level-2 {
    background: rgba(255, 193, 7, 0.2);
    border-color: #FFC107;
    color: #FFC107;
}

.difficulty-badge.level-3 {
    background: rgba(244, 67, 54, 0.2);
    border-color: #f44336;
    color: #f44336;
}

.keyboard-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    opacity: 0.7;
}

.question-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
}

.question-text {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--secondary);
    line-height: 1.4;
    overflow-wrap: anywhere;
    word-break: break-word;
}

/* 穴埋め用 */
.question-text .blank {
    display: inline-block;
    min-width: 3em;
    border-bottom: 3px solid var(--secondary);
    margin: 0 0.2em;
}

/* ============ 4択グリッド ============ */
.choices-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.choice-btn {
    padding: 1rem 0.8rem;
    background: var(--bg-card);
    border: 2px solid var(--primary);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.95rem;
    line-height: 1.4;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.choice-btn:hover:not(:disabled) {
    background: var(--primary);
    border-color: var(--secondary);
    transform: translateY(-2px);
}

.choice-btn.correct {
    background: var(--correct) !important;
    border-color: var(--correct) !important;
    color: white !important;
}

.choice-btn.wrong {
    background: var(--wrong) !important;
    border-color: var(--wrong) !important;
    color: white !important;
}

.choice-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* ============ 穴埋めエリア ============ */
.fillin-area {
    margin-bottom: 1rem;
}

.fillin-input {
    width: 100%;
    padding: 1rem;
    font-size: 1.3rem;
    font-family: var(--font);
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid var(--primary);
    border-radius: var(--radius);
    color: var(--text);
    text-align: center;
    margin-bottom: 1rem;
}

.fillin-input:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: var(--glow);
}

.fillin-input::placeholder {
    color: var(--text-muted);
}

.fillin-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn-hint {
    background: transparent;
    border: 2px solid var(--text-muted);
    color: var(--text-muted);
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.btn-hint:hover {
    border-color: var(--secondary);
    color: var(--secondary);
}

.btn-submit {
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: 2px solid var(--secondary);
    color: var(--text);
    padding: 0.8rem 2rem;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font);
    font-size: 1rem;
    font-weight: 700;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow);
}

/* ============ フィードバック ============ */
.feedback {
    min-height: 60px;
    padding: 1rem;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feedback.show {
    opacity: 1;
}

.feedback.correct {
    background: rgba(76, 175, 80, 0.2);
    border: 1px solid var(--correct);
    color: var(--correct);
}

.feedback.wrong {
    background: rgba(244, 67, 54, 0.2);
    border: 1px solid var(--wrong);
    color: var(--wrong);
}

/* ============ スコア表示 ============ */
.score-display {
    display: flex;
    justify-content: center;
    gap: 2rem;
    font-size: 1.2rem;
}

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

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

.score-accuracy {
    color: var(--secondary);
}

/* ============ リザルト画面 ============ */
.result-title {
    font-size: 2rem;
    color: var(--secondary);
    margin-bottom: 1.5rem;
}

.result-card {
    background: rgba(212, 175, 55, 0.1);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.result-row {
    display: flex;
    justify-content: space-between;
    padding: 0.8rem 0;
    border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.result-row:last-child {
    border-bottom: none;
}

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

.result-value {
    font-weight: 700;
    color: var(--text);
}

.result-value.new-record {
    color: var(--secondary);
    animation: pulse 1s ease infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

/* ============ 評価 ============ */
.result-grade {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

/* ============ リザルトボタン ============ */
.result-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn-retry,
.btn-home {
    padding: 1rem 2rem;
    border-radius: var(--radius);
    font-family: var(--font);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-retry {
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: 2px solid var(--secondary);
    color: var(--text);
}

.btn-retry:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow);
}

.btn-home {
    background: transparent;
    border: 2px solid var(--text-muted);
    color: var(--text-muted);
}

.btn-home:hover {
    border-color: var(--secondary);
    color: var(--secondary);
}

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

/* タブレット */
@media (max-width: 768px) {
    .question-text {
        font-size: 1.5rem;
    }

    .choice-btn {
        font-size: 0.9rem;
        padding: 0.8rem 0.6rem;
        min-height: 60px;
    }
}

/* モバイル */
@media (max-width: 480px) {
    .container {
        padding: 1.5rem 1rem;
        margin: 0.5rem;
    }

    .title {
        font-size: 2rem;
    }

    .btn-mode {
        padding: 1rem;
    }

    .mode-icon {
        font-size: 1.5rem;
    }

    .mode-name {
        font-size: 1.1rem;
    }

    .question-area {
        padding: 1rem;
    }

    .question-text {
        font-size: 1.3rem;
    }

    .choices-grid {
        gap: 0.5rem;
    }

    .choice-btn {
        font-size: 0.85rem;
        padding: 0.7rem 0.5rem;
        min-height: 55px;
    }

    .fillin-input {
        font-size: 1.1rem;
        padding: 0.8rem;
    }

    .fillin-buttons {
        flex-direction: column;
    }

    .score-display {
        gap: 1.5rem;
        font-size: 1rem;
    }

    .result-buttons {
        flex-direction: column;
    }

    .btn-retry,
    .btn-home {
        width: 100%;
    }

    .btn-count {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }

    .keyboard-hint {
        display: none;
    }
}

@media (max-width: 360px) {
    .container {
        padding: 1rem 0.75rem;
    }

    .question-text {
        font-size: 1.15rem;
    }

    .choices-grid {
        grid-template-columns: 1fr;
    }

    .choice-btn {
        min-height: 48px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============ 演出 ============ */
.combo-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    font-weight: 900;
    color: var(--secondary);
    text-shadow: 0 0 20px rgba(255, 165, 0, 0.8);
    pointer-events: none;
    z-index: 1000;
    animation: popupFade 1.2s ease-out forwards;
}

@keyframes popupFade {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.5);
    }

    20% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.2);
    }

    100% {
        opacity: 0;
        transform: translate(-50%, -150%) scale(1);
    }
}

.confetti {
    position: fixed;
    width: 10px;
    height: 10px;
    top: -10px;
    z-index: 999;
    animation: confettiFall 3s linear forwards;
}

@keyframes confettiFall {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }

    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

/* ============ Phase 2.4: 高度な機能 ============ */

/* 称号バッジ */
.result-title-badge {
    margin: 1rem 0;
    padding: 0.8rem 2rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    background: linear-gradient(135deg, #FFD700, #FFA500);
    border-radius: 50px;
    display: inline-block;
    box-shadow: 0 4px 15px rgba(255, 165, 0, 0.4);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    animation: badgePop 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.result-title-badge.rank-s {
    background: linear-gradient(135deg, #FFD700, #FDB931);
}

/* Gold */
.result-title-badge.rank-a {
    background: linear-gradient(135deg, #C0C0C0, #E0E0E0);
}

/* Silver */
.result-title-badge.rank-b {
    background: linear-gradient(135deg, #CD7F32, #B87333);
}

/* Bronze */
.result-title-badge.rank-c {
    background: linear-gradient(135deg, #8BC34A, #4CAF50);
}

/* Green */

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

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

/* 復習セクション */
.review-section {
    margin: 2rem 0;
    padding-top: 2rem;
    border-top: 1px dashed rgba(255, 255, 255, 0.2);
    animation: fadeIn 0.5s ease 0.5s both;
}

.btn-review {
    background: var(--accent);
    color: white;
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 4px 0 #d35400;
    transition: all 0.2s;
    margin-bottom: 1.5rem;
}

.btn-review:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 0 #d35400;
}

.btn-review:active {
    transform: translateY(2px);
    box-shadow: 0 2px 0 #d35400;
}

/* 間違えた問題リスト */
.wrong-list-container {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

.wrong-list-container h3 {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.wrong-answer-list {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
    max-height: 200px;
    overflow-y: auto;
}

.wrong-answer-item {
    padding: 0.8rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.wrong-answer-item:last-child {
    border-bottom: none;
}

.wrong-q {
    font-weight: bold;
    color: var(--text);
    margin-bottom: 0.3rem;
    display: block;
}

.wrong-a {
    color: var(--correct);
    font-size: 0.85rem;
}

.wrong-a::before {
    content: "正解: ";
    opacity: 0.7;
}