/**
 * review.html - AI复习顾问页面专用样式
 * 与 theme.css 变量体系完全对齐，支持 day/night 双模式
 */

/* ═══ 容器与布局 ═══ */
.review-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部区域 */
.review-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding: 24px 28px;
    background: var(--glass-bg, rgba(255,255,255,0.06));
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border, rgba(255,255,255,0.1));
    border-radius: 16px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 18px;
}

.material-icon-large {
    width: 56px; height: 56px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; color: white;
    box-shadow: 0 8px 24px rgba(102,126,234,0.3);
}

.header-info h1 {
    font-size: 22px; font-weight: 700; margin: 0 0 4px;
    color: var(--text-primary, #f0f3ff);
}
.header-info p {
    font-size: 13px; margin: 0; opacity: 0.6;
    color: var(--text-secondary, rgba(240,243,255,0.6));
}

/* 掌握度大数字 */
.mastery-display {
    text-align: center;
    min-width: 140px;
}
.mastery-score-big {
    font-size: 48px; font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.mastery-label {
    font-size: 12px; font-weight: 600; margin-top: 4px;
    color: var(--text-secondary); letter-spacing: 1px;
    text-transform: uppercase;
}
.mastery-ring-container {
    width: 120px; height: 120px; margin-top: 8px;
}

/* 主网格布局 */
.review-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 20px;
}

@media (max-width: 900px) {
    .review-grid { grid-template-columns: 1fr; }
    .review-header { flex-direction: column; gap: 16px; text-align: center; }
}

/* 左列面板 */
.review-panel {
    background: var(--glass-bg, rgba(255,255,255,0.05));
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border, rgba(255,255,255,0.08));
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 16px;
}

.panel-title {
    font-size: 15px; font-weight: 700; margin: 0 0 14px;
    color: var(--text-primary);
    display: flex; align-items: center; gap: 8px;
}
.panel-title i { color: #667eea; }

/* 薄弱知识点标签 */
.weak-tag {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 6px 14px; margin: 4px 4px 4px 0;
    border-radius: 20px; font-size: 13px; font-weight: 500;
    background: rgba(239,68,68,0.08); color: #fca5a5;
    border: 1px solid rgba(239,68,68,0.2);
    cursor: default; transition: all 0.2s;
}
.weak-tag:hover { background: rgba(239,68,68,0.15); }
.weak-tag .tag-icon { font-size: 11px; }

.weak-points-empty {
    text-align: center; padding: 30px; color: rgba(240,243,255,0.35);
    font-size: 13px;
}

/* 复习计划时间线 */
.timeline { position: relative; padding-left: 28px; }
.timeline::before {
    content: ''; position: absolute; left: 8px; top: 4px; bottom: 4px;
    width: 2px; background: linear-gradient(to bottom, #667eea, #764ba2); border-radius: 1px;
}
.timeline-item {
    position: relative; margin-bottom: 18px; padding: 12px 16px;
    background: rgba(102,126,234,0.04); border-radius: 10px;
    border-left: 3px solid #667eea; transition: transform 0.2s;
}
.timeline-item:hover { transform: translateX(4px); }
.timeline-dot {
    position: absolute; left: -25px; top: 14px;
    width: 14px; height: 14px; border-radius: 50%;
    background: #667eea; border: 3px solid var(--bg-primary, #0a0c1a);
}
.timeline-day {
    font-size: 13px; font-weight: 700; color: #667eea; margin-bottom: 4px;
}
.timeline-focus { font-size: 14px; color: var(--text-primary); margin-bottom: 4px; }
.timeline-meta {
    font-size: 11px; color: var(--text-secondary); display: flex; gap: 10px;
}
.timeline-meta span { display: flex; align-items: center; gap: 3px; }

/* 建议操作卡片 */
.action-cards { display: flex; flex-direction: column; gap: 10px; }

.action-card-item {
    display: flex; align-items: center; gap: 12px;
    padding: 12px 16px; border-radius: 10px;
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
    cursor: pointer; transition: all 0.2s;
}
.action-card-item:hover {
    background: rgba(102,126,234,0.08); border-color: rgba(102,126,234,0.2);
    transform: translateX(4px);
}
.action-icon-box {
    width: 38px; height: 38px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 15px; flex-shrink: 0;
}
.action-icon-box.reannotate { background: rgba(245,158,11,0.12); color: #f59e0b; }
.action-icon-box.practice   { background: rgba(59,130,246,0.12); color: #3b82f6; }
.action-icon-box.rewatch   { background: rgba(16,185,129,0.12); color: #10b981; }
.action-icon-box.mistakes  { background: rgba(239,68,68,0.12); color: #ef4444; }

.action-text h4 { font-size: 13px; font-weight: 600; margin: 0; color: var(--text-primary); }
.action-text p  { font-size: 11px; margin: 3px 0 0; color: var(--text-secondary); }

/* 鼓励语 */
.encouragement-banner {
    text-align: center; padding: 18px 24px;
    background: linear-gradient(135deg, rgba(102,126,234,0.08), rgba(118,75,162,0.08));
    border: 1px solid rgba(102,126,234,0.15); border-radius: 12px;
    font-size: 15px; font-style: italic; color: var(--text-primary);
}
.encouragement-banner i { color: #f59e0b; margin-right: 6px; }

/* 右列统计 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}
.stat-card {
    background: var(--glass-bg, rgba(255,255,255,0.04));
    border: 1px solid var(--glass-border, rgba(255,255,255,0.07));
    border-radius: 12px; padding: 14px 10px; text-align: center;
    transition: transform 0.2s, border-color 0.2s;
    position: relative;
}
.stat-card:hover {
    transform: translateY(-2px);
    border-color: rgba(102,126,234,0.2);
}
.stat-card-top {
    border-bottom: 2px solid rgba(102,126,234,0.15);
}
.stat-card-bottom {
    border-top: 2px solid rgba(102,126,234,0.15);
}
.stat-icon {
    width: 32px; height: 32px; border-radius: 10px;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 14px; margin-bottom: 6px;
}
.stat-value {
    font-size: 24px; font-weight: 800; line-height: 1.2;
    color: var(--text-primary);
}
.stat-label {
    font-size: 11px; font-weight: 600;
    color: var(--text-secondary); margin-top: 2px;
}
.stat-desc {
    font-size: 10px; color: var(--text-secondary);
    opacity: 0.5; margin-top: 1px;
}

/* 手机端 2列 */
@media (max-width: 480px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* AI对话面板 */
.chat-panel { height: 320px; display: flex; flex-direction: column; }
.chat-messages {
    flex: 1; overflow-y: auto; padding: 12px;
    display: flex; flex-direction: column; gap: 10px;
}
.chat-bubble {
    max-width: 85%; padding: 10px 14px; border-radius: 12px; font-size: 13px;
    line-height: 1.5;
}
.chat-bubble.ai {
    background: rgba(102,126,234,0.08); border: 1px solid rgba(102,126,234,0.15);
    border-bottom-left-radius: 3px; color: var(--text-primary);
    align-self: flex-start;
}
.chat-bubble.user {
    background: rgba(34,197,94,0.08); border: 1px solid rgba(34,197,94,0.15);
    border-bottom-right-radius: 3px; color: var(--text-primary);
    align-self: flex-end;
}
.chat-input-area {
    display: flex; gap: 8px; padding: 10px;
    border-top: 1px solid rgba(255,255,255,0.06);
}
.chat-input {
    flex: 1; padding: 10px 14px; border-radius: 20px;
    background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
    color: var(--text-primary); font-size: 13px; outline: none;
}
.chat-input::placeholder { color: rgba(240,243,255,0.3); }
.chat-send-btn {
    width: 38px; height: 38px; border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white; border: none; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; transition: opacity 0.2s;
}
[data-theme="day"] .chat-send-btn {
    background: linear-gradient(135deg, #3B82F6, #2563EB);
}
.chat-send-btn:hover { opacity: 0.85; }

/* 加载状态 */
.loading-shimmer {
    animation: shimmer 1.5s ease-in-out infinite;
    background: linear-gradient(90deg,
        rgba(255,255,255,0.03) 25%,
        rgba(255,255,255,0.08) 50%,
        rgba(255,255,255,0.03) 75%);
    background-size: 200% 100%;
    border-radius: 10px; min-height: 80px;
}
@keyframes shimmer { to { background-position: -200% 0; } }

/* 生成按钮 */
.generate-btn {
    width: 100%; padding: 14px 24px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white; border: none; border-radius: 12px;
    font-size: 15px; font-weight: 700; cursor: pointer;
    display: flex; align-items: center; justify-content: center; gap: 8px;
    transition: all 0.25s; box-shadow: 0 4px 16px rgba(102,126,234,0.3);
}
.generate-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(102,126,234,0.4); }
[data-theme="day"] .generate-btn {
    background: linear-gradient(135deg, #3B82F6, #2563EB);
    box-shadow: 0 4px 16px rgba(59,130,246,0.3);
}
[data-theme="day"] .generate-btn:hover {
    box-shadow: 0 8px 24px rgba(59,130,246,0.4);
}
.generate-btn:disabled {
    opacity: 0.6; cursor: not-allowed; transform: none !important;
}
.generate-btn .spinner { animation: spin 1s linear infinite; }


/* 空状态 */
.empty-state {
    text-align: center; padding: 60px 20px; color: rgba(240,243,255,0.35);
}
.empty-state i { font-size: 48px; margin-bottom: 12px; display: block; }
.empty-state p { font-size: 14px; margin: 4px 0; }