/* ==========================================
   七夕灯谜 · 自由模式 + 计时挑战
   ========================================== */

/* 模式切换 */
.riddle-mode-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin: 0 0 32px;
    flex-wrap: wrap;
}

.riddle-mode-tab {
    background: rgba(255, 215, 0, 0.05);
    border: 1px solid rgba(255, 215, 0, 0.25);
    color: var(--color-cream);
    padding: 14px 24px;
    border-radius: 12px;
    cursor: pointer;
    font-family: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 140px;
    transition: all 0.3s;
}

.riddle-mode-tab:hover {
    border-color: var(--color-gold);
    transform: translateY(-2px);
}

.riddle-mode-tab.active {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(200, 16, 46, 0.2));
    border-color: var(--color-gold);
    color: var(--color-gold);
}

.mode-icon { font-size: 24px; }
.mode-text { font-size: 16px; font-weight: 500; letter-spacing: 2px; }
.mode-desc { font-size: 11px; opacity: 0.7; letter-spacing: 1px; }

.riddle-panel { display: none; animation: fadeIn 0.4s; }
.riddle-panel.active { display: block; }

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

.hidden { display: none !important; }

/* ========== 自由模式 ========== */
.riddles-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 215, 0, 0.15);
    border-radius: 12px;
    padding: 16px 20px;
}

.riddle-counter {
    font-size: 14px;
    color: var(--color-cream);
    letter-spacing: 1px;
}

.riddle-counter strong {
    color: var(--color-gold);
    font-family: var(--font-title);
    font-size: 22px;
    margin: 0 4px;
}

.riddle-filter {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    font-size: 13px;
    color: var(--color-cream);
    opacity: 0.85;
}

.riddle-filter label { letter-spacing: 1px; }

.riddle-filter-btn {
    background: transparent;
    border: 1px solid rgba(255, 215, 0, 0.3);
    color: var(--color-cream);
    padding: 4px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    font-size: 12px;
    letter-spacing: 1px;
    transition: all 0.2s;
}

.riddle-filter-btn:hover,
.riddle-filter-btn.active {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(200, 16, 46, 0.15));
    border-color: var(--color-gold);
    color: var(--color-gold);
}

.riddles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.riddle-search-wrap {
    max-width: 520px;
    margin: 0 auto 28px;
}

.riddle-search {
    width: 100%;
    padding: 12px 18px;
    background: rgba(10, 5, 24, 0.5);
    border: 1px solid rgba(255, 215, 0, 0.3);
    border-radius: 24px;
    color: var(--color-cream);
    font-family: var(--font-body);
    font-size: 14px;
    letter-spacing: 1px;
    transition: all 0.25s;
    outline: none;
}

.riddle-search:focus {
    border-color: var(--color-gold);
    background: rgba(10, 5, 24, 0.7);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.12);
}

.riddle-search::placeholder {
    color: var(--color-gold-soft);
    opacity: 0.55;
}

.riddle-empty {
    text-align: center;
    padding: 60px 20px;
    background: rgba(10, 5, 24, 0.3);
    border: 1px dashed rgba(255, 215, 0, 0.25);
    border-radius: 16px;
    margin-top: 24px;
}

.riddle-empty-icon {
    font-size: 56px;
    margin-bottom: 12px;
    opacity: 0.7;
}

.riddle-empty-text {
    font-size: 16px;
    color: var(--color-gold-soft);
    letter-spacing: 2px;
    margin-bottom: 18px;
    opacity: 0.85;
}

.riddle-card {
    background: linear-gradient(135deg,
        rgba(255, 215, 0, 0.05) 0%,
        rgba(200, 16, 46, 0.04) 100%);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 14px;
    padding: 24px 20px;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    min-height: 200px;
}

.riddle-card:hover {
    border-color: var(--color-gold);
    transform: translateY(-3px);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.3);
}

.riddle-card.dim {
    display: none;
}

.riddle-num {
    font-size: 12px;
    color: var(--color-gold-soft);
    letter-spacing: 2px;
    margin-bottom: 4px;
}

.riddle-difficulty {
    color: var(--color-gold);
    font-size: 14px;
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.riddle-q {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-cream);
    margin-bottom: 16px;
    flex: 1;
    letter-spacing: 1px;
}

.riddle-reveal {
    background: linear-gradient(135deg, #ffd700 0%, #c8102e 100%);
    color: white;
    border: none;
    padding: 8px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: 13px;
    letter-spacing: 2px;
    transition: all 0.3s;
    align-self: flex-start;
}

.riddle-reveal:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(200, 16, 46, 0.4);
}

.riddle-answer {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px dashed rgba(255, 215, 0, 0.3);
    display: none;
    animation: revealAnswer 0.5s;
}

.riddle-card.revealed .riddle-answer { display: block; }

@keyframes revealAnswer {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

.answer-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.answer-label {
    font-size: 12px;
    color: var(--color-gold-soft);
    letter-spacing: 2px;
}

.answer-char {
    font-family: var(--font-calligraphy);
    font-size: 32px;
    color: var(--color-gold);
    font-weight: bold;
    text-shadow: 0 0 12px rgba(255, 215, 0, 0.5);
}

.answer-hint {
    font-size: 13px;
    color: var(--color-cream);
    opacity: 0.8;
    line-height: 1.6;
    letter-spacing: 0.5px;
    text-indent: 0;
}

/* ========== 挑战模式 ========== */
.challenge-intro,
.challenge-result {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: 40px 24px;
    background: linear-gradient(135deg,
        rgba(255, 215, 0, 0.05) 0%,
        rgba(200, 16, 46, 0.04) 100%);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 18px;
}

.challenge-icon {
    font-size: 64px;
    margin-bottom: 16px;
    animation: floatBounce 2s ease-in-out infinite;
}

@keyframes floatBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.challenge-intro h3,
.challenge-result h3 {
    font-family: var(--font-title);
    font-size: 32px;
    color: var(--color-gold);
    letter-spacing: 4px;
    margin-bottom: 12px;
}

.challenge-intro p {
    font-size: 14px;
    color: var(--color-cream);
    opacity: 0.85;
    margin-bottom: 28px;
    letter-spacing: 1px;
    line-height: 1.8;
}

.challenge-best {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 28px;
}

.best-item {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 10px;
    padding: 16px 8px;
}

.best-label {
    font-size: 12px;
    color: var(--color-gold-soft);
    letter-spacing: 1px;
    margin-bottom: 6px;
}

.best-value {
    font-family: var(--font-title);
    font-size: 24px;
    color: var(--color-gold);
    font-weight: bold;
}

.challenge-start-btn {
    background: linear-gradient(135deg, #ffd700 0%, #c8102e 100%);
    color: white;
    border: none;
    padding: 16px 44px;
    border-radius: 12px;
    font-family: var(--font-title);
    font-size: 18px;
    letter-spacing: 4px;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(200, 16, 46, 0.5);
    transition: all 0.3s;
}

.challenge-start-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 28px rgba(200, 16, 46, 0.6);
}

/* 游戏中 */
.challenge-playing {
    max-width: 720px;
    margin: 0 auto;
}

.challenge-hud {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.hud-item {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 12px;
    padding: 14px 8px;
    text-align: center;
}

.hud-timer { border-color: rgba(255, 100, 100, 0.4); }
.hud-timer.warning { animation: timerPulse 0.8s ease-in-out infinite; }

@keyframes timerPulse {
    0%, 100% { border-color: rgba(255, 50, 50, 0.6); box-shadow: 0 0 0 0 rgba(255, 50, 50, 0.4); }
    50% { border-color: rgba(255, 50, 50, 1); box-shadow: 0 0 16px 4px rgba(255, 50, 50, 0.2); }
}

.hud-label {
    display: block;
    font-size: 11px;
    color: var(--color-gold-soft);
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.hud-value {
    display: inline-block;
    font-family: var(--font-title);
    font-size: 28px;
    color: var(--color-gold);
    font-weight: bold;
}

.hud-unit { font-size: 12px; color: var(--color-cream); opacity: 0.7; margin-left: 2px; }

.challenge-progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 24px;
}

.challenge-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #ffd700 0%, #c8102e 100%);
    transition: width 0.4s;
}

.challenge-riddle {
    background: linear-gradient(135deg,
        rgba(255, 215, 0, 0.05) 0%,
        rgba(200, 16, 46, 0.04) 100%);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 14px;
    padding: 32px 24px;
    margin-bottom: 20px;
    text-align: center;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.challenge-riddle-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--color-gold-soft);
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.challenge-diff { color: var(--color-gold); font-size: 16px; letter-spacing: 1px; }

.challenge-riddle-q {
    font-size: 22px;
    line-height: 1.7;
    color: var(--color-cream);
    letter-spacing: 2px;
    font-family: var(--font-poem);
}

.challenge-input-wrap {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.challenge-input {
    flex: 1;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 215, 0, 0.3);
    color: var(--color-cream);
    padding: 14px 18px;
    border-radius: 10px;
    font-family: var(--font-poem);
    font-size: 18px;
    letter-spacing: 4px;
    outline: none;
    transition: border-color 0.3s;
    text-align: center;
}

.challenge-input:focus {
    border-color: var(--color-gold);
    background: rgba(255, 215, 0, 0.05);
}

.challenge-submit {
    background: linear-gradient(135deg, #ffd700 0%, #c8102e 100%);
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: 10px;
    cursor: pointer;
    font-family: inherit;
    font-size: 15px;
    letter-spacing: 2px;
    transition: all 0.3s;
    white-space: nowrap;
}

.challenge-submit:hover { transform: translateY(-2px); }
.challenge-submit:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.challenge-feedback {
    min-height: 28px;
    text-align: center;
    font-size: 15px;
    letter-spacing: 2px;
    color: var(--color-cream);
}

.challenge-feedback.correct { color: #4ade80; font-weight: bold; }
.challenge-feedback.wrong { color: #f87171; }
.challenge-feedback.skip { color: var(--color-gold-soft); }

/* 挑战结果 */
.challenge-result-icon {
    font-size: 80px;
    margin-bottom: 16px;
    animation: floatBounce 2s ease-in-out infinite;
}

.challenge-result-score {
    margin: 20px 0;
}

.result-score-num {
    font-family: var(--font-calligraphy);
    font-size: 72px;
    color: var(--color-gold);
    font-weight: bold;
    text-shadow: 0 0 24px rgba(255, 215, 0, 0.5);
}

.result-score-unit {
    font-size: 24px;
    color: var(--color-gold-soft);
    margin-left: 4px;
    letter-spacing: 4px;
}

.challenge-result-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin: 24px 0;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.result-stat {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 10px;
    padding: 14px 8px;
}

.result-stat-label { font-size: 11px; color: var(--color-gold-soft); letter-spacing: 1px; margin-bottom: 4px; }
.result-stat-value { font-family: var(--font-title); font-size: 22px; color: var(--color-gold); }

.challenge-result-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.challenge-result-actions .riddle-reveal {
    background: rgba(255, 215, 0, 0.1);
    color: var(--color-gold);
    border: 1px solid rgba(255, 215, 0, 0.4);
    padding: 14px 28px;
    border-radius: 10px;
    letter-spacing: 2px;
}

/* 响应式 */
@media (max-width: 568px) {
    .riddle-mode-tab { min-width: 120px; padding: 12px 16px; }
    .mode-text { font-size: 14px; }
    .riddles-grid { grid-template-columns: 1fr; }
    .riddles-toolbar { flex-direction: column; align-items: stretch; }
    .challenge-hud { grid-template-columns: 1fr; }
    .hud-value { font-size: 22px; }
    .challenge-riddle-q { font-size: 18px; }
    .result-score-num { font-size: 56px; }
    .challenge-best, .challenge-result-stats { grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
    .best-value { font-size: 18px; }
}