/* 1. 颜色变量 (支持白天/夜间) */
:root {
    --c-primary: #005a9c;
    --c-primary-dark: #004a80;
    --c-primary-light: #e6f0f7;
    --c-bg: #f7f9fa;
    --c-card-bg: #ffffff;
    --c-text-primary: #333333;
    --c-text-secondary: #555555;
    --c-border: #e4e7eb;
    --c-shadow: rgba(0, 0, 0, 0.08);
    --c-accent-red: #d9534f;
    --c-accent-green: #5cb85c;
    --c-accent-orange: #f0ad4e;
    --c-note-bg: #e9e9e9;
    --c-note-text: #333;
    --c-btn-bg: #f0f0f0;
    --c-btn-text: var(--c-text-primary);
}

/* 1b. 夜间模式变量 */
body.dark-mode {
    --c-bg: #121212;
    --c-card-bg: #1e1e1e;
    --c-text-primary: #e0e0e0;
    --c-text-secondary: #b0b0b0;
    --c-border: #3a3a3a;
    --c-shadow: rgba(0, 0, 0, 0.2);
    --c-primary-light: #2a3b4c;
    --c-note-bg: #4a4a4a;
    --c-note-text: #e0e0e0;
    --c-btn-bg: #333333;
    --c-btn-text: var(--c-text-primary);
}

/* 2. 基础重置和设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    overflow-y: scroll; /* 始终显示滚动条，防止页面跳动 */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    background-color: var(--c-bg);
    color: var(--c-text-primary);
    margin: 0;
    padding: 20px 10px;
    /* 电脑版上下留白 */
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    transition: background-color 0.3s, color 0.3s;
}

/* 3. 主应用容器 */
#app-container {
    width: 100%;
    max-width: 500px;
    background-color: var(--c-card-bg);
    border-radius: 16px;
    box-shadow: 0 8px 24px var(--c-shadow);
    overflow: hidden;
    border: 1px solid var(--c-border);
    transition: background-color 0.3s, border-color 0.3s;
}

/* 4. 头部 */
header {
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
    color: white;
    padding: 25px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    margin: 0;
    font-size: 1.6em;
    font-weight: 600;
}

.time-display {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

#clock {
    font-size: 1.4em;
    font-weight: 600;
    margin: 0;
}

#date-display,
#weekday-display {
    font-size: 0.9em;
    opacity: 0.8;
    font-weight: 300;
    line-height: 1.4;
}

/* 5. 控制区域 */
.controls {
    padding: 20px 25px;
    background-color: var(--c-card-bg);
    border-bottom: 1px solid var(--c-border);
    transition: background-color 0.3s, border-color 0.3s;
}

.control-group {
    margin-bottom: 18px;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--c-text-secondary);
    font-size: 1.1em;
}

select {
    width: 100%;
    padding: 12px;
    font-size: 1.1em;
    border-radius: 8px;
    border: 1px solid var(--c-border);
    background-color: var(--c-bg);
    color: var(--c-text-primary);
    appearance: none;
    /* 适配夜间模式的SVG箭头 */
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23005a9c%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-13%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2013l128%20128c3.6%203.6%207.8%205.4%2013%205.4s9.4-1.8%2013-5.4l128-128c3.6-3.6%205.4-7.8%205.4-13%200-5-1.8-9.2-5.4-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 12px;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

body.dark-mode select {
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23b0b0b0%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-13%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2013l128%20128c3.6%203.6%207.8%205.4%2013%205.4s9.4-1.8%2013-5.4l128-128c3.6-3.6%205.4-7.8%205.4-13%200-5-1.8-9.2-5.4-12.8z%22%2F%3E%3C%2Fsvg%3E");
}

/* 6. 日期切换开关 & 模式切换开关（共用样式）*/
.toggle-switch {
    display: flex;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--c-primary);
}

/* 模式切换优化：在较大屏幕上水平排列 */
.toggle-switch.mode-switch {
    flex-wrap: nowrap;
    /* 保持一行 */
}

.toggle-switch input {
    display: none;
}

.toggle-switch label {
    flex: 1;
    text-align: center;
    padding: 10px 8px;
    /* 减少垂直和水平内边距 */
    margin: 0;
    cursor: pointer;
    font-weight: 600;
    font-size: 1em;
    /* 减小字号 */
    color: var(--c-primary);
    background-color: var(--c-card-bg);
    transition: all 0.2s ease-in-out;
    min-width: 0;
    /* 允许收缩 */
}

/* 模式切换标签在小屏幕上的特殊调整 */
.toggle-switch.mode-switch label {
    font-size: 0.9em;
    padding: 10px 5px;
}

body.dark-mode .toggle-switch label {
    color: var(--c-text-primary);
}

.toggle-switch label:hover {
    background-color: var(--c-primary-light);
}

.toggle-switch input:checked+label {
    background-color: var(--c-primary);
    color: white;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

body.dark-mode .toggle-switch input:checked+label {
    color: white;
}

/* 7. 结果区域 */
#results {
    padding: 10px 25px 25px 25px;
}

#results h2 {
    margin: 10px 0 20px 0;
    color: var(--c-text-secondary);
    border-bottom: 2px solid var(--c-border);
    padding-bottom: 10px;
    font-weight: 600;
    transition: color 0.3s, border-color 0.3s;
}

/* 8. 班车卡片 (v3 紧凑布局) */
.bus-card {
    background-color: var(--c-card-bg);
    border: 1px solid var(--c-border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
    box-shadow: 0 4px 12px var(--c-shadow);
    transition: all 0.3s ease;
    position: relative;
}

.bus-card.no-bus {
    text-align: center;
    padding: 30px;
    font-size: 1.1em;
    background-color: var(--c-primary-light);
    border-color: var(--c-primary);
    color: var(--c-primary-dark);
}

body.dark-mode .bus-card.no-bus {
    color: var(--c-text-primary);
}

.bus-time {
    float: right;
    font-size: 1.6em;
    font-weight: 700;
    color: var(--c-primary);
}

.wait-time {
    font-size: 1.2em;
    margin: 5px 0 15px 0 !important;
    font-weight: 500;
}

.wait-time strong {
    color: var(--c-accent-red);
    font-size: 1.5em;
    font-weight: 700;
}

.bus-details {
    clear: both;
    padding-top: 15px;
    color: var(--c-text-secondary);
}

.bus-details p {
    font-size: 1.1em;
    margin-bottom: 12px;
    font-weight: 500;
}

.notes-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    /* 标签间距 */
}

/* 8b. 突出的备注徽章 (v3) */
.bus-details .note {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.9em;
    font-weight: 600;
    background-color: var(--c-note-bg);
    color: var(--c-note-text);
}

/* 特殊备注高亮 */
.bus-details .note.highlight {
    /* 途径纪忠楼 */
    background-color: var(--c-accent-orange);
    color: white;
}

.bus-details .note.important {
    /* 大巴 */
    background-color: var(--c-accent-green);
    color: white;
}

.note-placeholder {
    font-style: italic;
    color: #aaa;
    font-size: 0.9em;
}

/* 9. 底部 */
footer {
    text-align: center;
    padding: 20px;
    font-size: 0.9em;
    color: #aaa;
    background-color: var(--c-bg);
    border-top: 1px solid var(--c-border);
    transition: background-color 0.3s, border-color 0.3s;
}

/* 10. 路线总览表样式 */
#all-schedules-container {
    padding: 20px 25px;
}

.schedule-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 25px;
}

.schedule-table th,
.schedule-table td {
    padding: 10px;
    border: 1px solid var(--c-border);
    text-align: left;
    font-size: 0.95em;
}

.schedule-table th {
    background-color: var(--c-primary-light);
    color: var(--c-primary-dark);
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 10;
}

.schedule-table tr:nth-child(even) {
    background-color: var(--c-bg);
}

.schedule-table td:first-child {
    font-weight: 600;
    color: var(--c-primary);
}

/* 11. 提醒按钮样式 (已优化位置) */
.alarm-area {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    margin-top: 15px;
    /* 移到卡片底部 */
    padding-top: 15px;
    border-top: 1px dashed var(--c-border);
}

.set-alarm-btn {
    padding: 8px 12px;
    background-color: var(--c-btn-bg);
    color: var(--c-btn-text);
    border: 1px solid var(--c-border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95em;
    font-weight: 500;
    transition: background-color 0.2s;
    margin-right: 15px;
}

.set-alarm-btn:hover {
    background-color: var(--c-primary-light);
}

.set-alarm-btn.is-set {
    background-color: var(--c-accent-red);
    color: white;
    border-color: var(--c-accent-red);
}

.alarm-input-group {
    /* 调整为内联显示，不再绝对定位 */
    display: flex;
    align-items: center;
    background: var(--c-card-bg);
    padding: 5px 0;
    font-size: 1em;
    color: var(--c-text-secondary);
}

.alarm-input-group input {
    width: 45px;
    padding: 5px;
    border: 1px solid var(--c-border);
    border-radius: 4px;
    text-align: center;
    margin: 0 5px;
    color: var(--c-text-primary);
    background-color: var(--c-bg);
}

.alarm-input-group button {
    margin-left: 8px;
    padding: 5px 10px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background-color: var(--c-primary);
    color: white;
    transition: background-color 0.2s;
}

.alarm-input-group button:hover {
    background-color: var(--c-primary-dark);
}

/* 12. 手机响应式适配 (优化模式切换) */
@media (max-width: 480px) {
    body {
        padding: 0;
    }

    #app-container {
        border-radius: 0;
        border: none;
        min-height: 100vh;
        box-shadow: none;
    }

    .controls,
    #results,
    #all-schedules-container {
        padding: 20px;
    }

    /* 模式切换在手机上垂直堆叠，避免拥挤 */
    .toggle-switch.mode-switch {
        flex-direction: column;
        flex-wrap: wrap;
        height: auto;
    }

    .toggle-switch.mode-switch label {
        padding: 10px;
        border-radius: 0 !important;
        border-bottom: 1px solid var(--c-primary);
    }

    .toggle-switch.mode-switch label:last-child {
        border-bottom: none;
    }

    /* 保持边框圆角 */
    .toggle-switch.mode-switch input:first-child+label {
        border-top-left-radius: 8px;
        border-top-right-radius: 8px;
    }

    .toggle-switch.mode-switch input:last-child+label {
        border-bottom-left-radius: 8px;
        border-bottom-right-radius: 8px;
    }

    .bus-card {
        padding: 15px;
        border-radius: 10px;
    }

    .bus-time {
        font-size: 1.4em;
    }

    .wait-time {
        font-size: 1.1em;
    }

    .wait-time strong {
        font-size: 1.4em;
    }

    .bus-details p {
        font-size: 1em;
    }

    .bus-details .note {
        font-size: 0.85em;
    }

    .alarm-area {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .set-alarm-btn {
        margin-right: 0;
        width: 100%;
        text-align: center;
        box-sizing: border-box;
    }
}