/* ===== 顶部导航 ===== */
.top-nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 24px; background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(16px); border-bottom: 1px solid rgba(255,255,255,0.08);
}
.nav-brand { display: flex; align-items: center; gap: 10px; }
.brand-icon { font-size: 1.5rem; }
.brand-text { font-size: 1.2rem; font-weight: 700; color: #f1f5f9; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-btn {
    width: 38px; height: 38px; border-radius: 10px;
    background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.1);
    color: #e2e8f0; font-size: 1.1rem; cursor: pointer;
    transition: all 0.2s ease; display: flex; align-items: center; justify-content: center;
}
.nav-btn:hover { background: rgba(255,255,255,0.15); transform: scale(1.05); }
.user-menu { display: flex; align-items: center; gap: 8px; }
.user-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    display: flex; align-items: center; justify-content: center;
    color: white; font-weight: 700; font-size: 0.9rem;
}
.logout-btn {
    padding: 6px 14px; border-radius: 8px; font-size: 0.8rem; font-weight: 600;
    background: rgba(239, 68, 68, 0.15); color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3); cursor: pointer; transition: all 0.2s ease;
}

/* ===== 欢迎区域 ===== */
.hero-section { padding: 100px 24px 40px; text-align: center; }
.hero-title { font-size: 2.2rem; font-weight: 800; color: #f1f5f9; margin-bottom: 8px; }
.hero-subtitle { font-size: 1rem; color: #94a3b8; }

/* ===== 工具卡片网格 ===== */
.tools-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px; padding: 0 24px 40px; max-width: 800px; margin: 0 auto;
}
.tool-card {
    position: relative; padding: 24px; border-radius: 16px;
    background: rgba(30, 41, 59, 0.6); backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.08); cursor: pointer;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1); overflow: hidden;
}
.tool-card:hover {
    transform: translateY(-4px) scale(1.02);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 12px 40px rgba(99, 102, 241, 0.15);
}
.tool-card:active { transform: scale(0.98); }
.tool-card.coming-soon { opacity: 0.6; }
.tool-card.coming-soon:hover { transform: none; box-shadow: none; }
.tool-card.add-new { border-style: dashed; border-color: rgba(255,255,255,0.15); }
.tool-card-icon { font-size: 2rem; margin-bottom: 12px; }
.tool-card-title { font-size: 1rem; font-weight: 700; color: #f1f5f9; margin-bottom: 4px; }
.tool-card-desc { font-size: 0.8rem; color: #94a3b8; line-height: 1.4; }
.tool-card-badge {
    position: absolute; top: 12px; right: 12px;
    width: 24px; height: 24px; border-radius: 50%;
    background: #ef4444; color: white; font-size: 0.7rem; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
}
.tool-card-tag {
    position: absolute; top: 12px; right: 12px;
    padding: 4px 10px; border-radius: 20px; font-size: 0.7rem; font-weight: 600;
    background: rgba(245, 158, 11, 0.2); color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* ===== 工具面板 ===== */
.tool-panel {
    position: fixed; inset: 0; z-index: 200;
    background: rgba(15, 23, 42, 0.95); backdrop-filter: blur(20px);
    display: flex; flex-direction: column; animation: slideIn 0.3s ease;
}
@keyframes slideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }
.tool-panel-header {
    display: flex; align-items: center; gap: 16px; padding: 16px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.panel-back-btn {
    padding: 8px 16px; border-radius: 8px; font-size: 0.85rem; font-weight: 600;
    background: rgba(255,255,255,0.08); color: #e2e8f0;
    border: 1px solid rgba(255,255,255,0.1); cursor: pointer; transition: all 0.2s ease;
}
.panel-back-btn:hover { background: rgba(255,255,255,0.15); }
.tool-panel-header h2 { font-size: 1.1rem; color: #f1f5f9; flex: 1; }
.panel-actions { display: flex; gap: 8px; }
.panel-action-btn {
    width: 36px; height: 36px; border-radius: 8px; font-size: 1rem;
    background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.1);
    color: #e2e8f0; cursor: pointer; transition: all 0.2s ease;
}
.panel-action-btn:hover { background: rgba(255,255,255,0.15); }
.tool-panel-body {
    flex: 1; overflow-y: auto; padding: 16px 24px;
    max-width: 800px; margin: 0 auto; width: 100%;
}

/* 待办输入区 */
.todo-input-area { margin-bottom: 16px; }
.todo-input-row { display: flex; gap: 8px; flex-wrap: wrap; }
.todo-input-row input[type="text"] {
    flex: 1; min-width: 150px; padding: 10px 14px; border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.1); background: rgba(255,255,255,0.06);
    color: #e2e8f0; font-size: 0.9rem; outline: none;
}
.todo-input-row input[type="text"]:focus { border-color: #6366f1; }
.todo-input-row select, .todo-input-row input[type="date"] {
    padding: 10px; border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.1); background: rgba(255,255,255,0.06);
    color: #e2e8f0; font-size: 0.85rem;
}
.add-btn {
    width: 40px; border-radius: 10px; background: #6366f1; color: white;
    border: none; font-size: 1.2rem; cursor: pointer; transition: all 0.2s ease;
}
.add-btn:hover { background: #4f46e5; transform: scale(1.05); }

/* 筛选 */
.todo-filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.todo-filters .filter-btn {
    padding: 6px 14px; border-radius: 20px; font-size: 0.8rem;
    background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
    color: #94a3b8; cursor: pointer; transition: all 0.2s ease;
}
.todo-filters .filter-btn.active {
    background: rgba(99, 102, 241, 0.2); border-color: #6366f1; color: #a5b4fc;
}
.todo-filters select {
    padding: 6px 10px; border-radius: 8px;
    background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
    color: #94a3b8; font-size: 0.8rem;
}

/* 统计 */
.stats-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.stat-chip {
    padding: 8px 16px; border-radius: 10px;
    background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.08);
    font-size: 0.85rem; color: #94a3b8;
}
.stat-num { font-weight: 700; color: #f1f5f9; margin-right: 4px; }

/* 分类 */
.category-bar { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.category-list { display: flex; gap: 6px; flex-wrap: wrap; }
.category-tag {
    padding: 5px 12px; border-radius: 20px; font-size: 0.75rem;
    background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
    color: #94a3b8; cursor: pointer; transition: all 0.2s ease;
}
.category-tag.active { background: rgba(99, 102, 241, 0.2); border-color: #6366f1; color: #a5b4fc; }
.category-tag .delete-btn { opacity: 0.6; margin-left: 4px; font-size: 0.7rem; }
.category-add { display: flex; gap: 4px; }
.category-add input {
    width: 80px; padding: 5px 10px; border-radius: 8px;
    background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
    color: #e2e8f0; font-size: 0.75rem;
}
.category-add button {
    width: 28px; border-radius: 8px; background: #6366f1; color: white;
    border: none; cursor: pointer; font-size: 0.9rem;
}

/* 任务列表深色 */
.task-list { display: flex; flex-direction: column; gap: 8px; }
.task-item {
    display: flex; align-items: center; gap: 12px; padding: 14px 16px;
    background: rgba(30, 41, 59, 0.6); border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px; transition: all 0.2s ease;
}
.task-item:hover { border-color: rgba(99, 102, 241, 0.3); background: rgba(30, 41, 59, 0.8); }
.task-item.completed { opacity: 0.5; }
.task-item.completed .task-title { text-decoration: line-through; color: #64748b; }
.task-item.selected { border-color: #6366f1; background: rgba(99, 102, 241, 0.1); }
.task-content { flex: 1; min-width: 0; }
.task-title { font-size: 0.95rem; font-weight: 600; color: #f1f5f9; word-break: break-word; }
.task-meta { display: flex; gap: 8px; flex-wrap: wrap; font-size: 0.75rem; color: #94a3b8; margin-top: 4px; }
.task-actions { display: flex; gap: 6px; }
.task-action-btn {
    width: 32px; height: 32px; border-radius: 8px; font-size: 0.85rem;
    background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
    color: #e2e8f0; cursor: pointer; transition: all 0.2s ease;
}
.task-action-btn:hover { background: rgba(255,255,255, 0.12); }
.task-action-btn.complete-btn:hover { background: rgba(16, 185, 129, 0.2); }
.task-action-btn.delete-btn:hover { background: rgba(239, 68, 68, 0.2); }
.task-checkbox { width: 20px; height: 20px; accent-color: #6366f1; cursor: pointer; }
.task-priority.high { color: #f87171; }
.task-priority.medium { color: #fbbf24; }
.task-priority.low { color: #34d399; }

/* 操作栏 */
.todo-actions {
    display: flex; gap: 8px; margin-top: 16px; padding-top: 16px;
    border-top: 1px solid rgba(255,255,255,0.08);
}
.action-btn {
    padding: 8px 16px; border-radius: 10px; font-size: 0.85rem; font-weight: 600;
    background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
    color: #94a3b8; cursor: pointer; transition: all 0.2s ease;
}
.action-btn:hover { background: rgba(255,255,255,0.12); color: #e2e8f0; }
.action-btn.danger { border-color: rgba(239, 68, 68, 0.3); color: #fca5a5; }
.action-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* 空状态 */
.empty-state { text-align: center; padding: 60px 20px; color: #64748b; }
.empty-icon { font-size: 3rem; margin-bottom: 12px; opacity: 0.5; }
.empty-hint { font-size: 0.85rem; margin-top: 4px; }