/* theme.css — 统一视觉层
   所有页面在各自样式表之后加载本文件，用于统一历史样式。
   只影响外观，不改变任何页面结构或交互。 */

:root {
    --font-body: 'Microsoft YaHei', 'PingFang SC', sans-serif;

    --color-primary: #007bff;
    --color-primary-dark: #0056b3;
    --color-success: #28a745;
    --color-success-dark: #218838;
    --color-danger: #dc3545;
    --color-danger-dark: #c82333;
    --color-purple: #9c27b0;
    --color-purple-dark: #7b1fa2;
    --color-gray: #6c757d;
    --color-gray-dark: #5a6268;

    --color-text: #333;
    --color-text-body: #555;
    --color-text-secondary: #666;
    --color-muted: #888;
    --color-hint: #999;

    --color-page: #f5f5f5;
    --color-surface: #fff;
    --color-surface-alt: #f8f9fa;
    --color-topbar: #f0f2f5;
    --color-border: #ddd;
    --color-border-light: #eef0f2;

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-pill: 20px;

    --shadow-card: 0 10px 40px rgba(15, 23, 42, 0.08);
}

/* ===== 基础排版 ===== */
body {
    font-family: var(--font-body);
    background: var(--color-page);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    /* 有底部固定导航的页面由 style.css 设置 --bottom-chrome */
    padding-bottom: var(--bottom-chrome, 0px);
}

/* ===== 页面容器：四个页面统一宽度与留白 ===== */
.container,
.training-container,
.profile-container {
    max-width: 720px;
    margin: 0 auto;
    padding: 20px;
    background: var(--color-surface);
    min-height: 100vh;
}

@media (max-width: 600px) {
    .container,
    .training-container,
    .profile-container { padding: 14px; }
}

@media (min-width: 768px) {
    .container,
    .training-container,
    .profile-container {
        max-width: 1000px;
        min-height: auto;
        margin: 28px auto;
        border-radius: var(--radius-xl);
        box-shadow: var(--shadow-card);
        padding: 32px 40px;
    }
}

/* ===== 标题体系统一 ===== */
h2,
.page-title {
    font-size: 22px;
    font-weight: bold;
    color: var(--color-text);
    margin-bottom: 12px;
}

h3 {
    font-size: 18px;
    color: var(--color-text);
    margin: 20px 0 10px;
}

.page-subtitle {
    font-size: 14px;
    color: var(--color-muted);
    margin-bottom: 24px;
    line-height: 1.5;
}

@media (min-width: 768px) {
    h2,
    .page-title { font-size: 26px; }

    .page-subtitle { font-size: 15px; }
}

/* ===== 顶部栏统一 ===== */
.top-bar {
    background: var(--color-topbar);
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 14px;
}

.top-bar .user-info { color: var(--color-text-secondary); }

.top-bar .user-info strong { color: var(--color-text); }

.top-bar .badge {
    display: inline-block;
    background: var(--color-purple);
    color: #fff;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    margin-left: 6px;
}

.top-bar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

@media (min-width: 768px) {
    .top-bar { padding: 14px 20px; font-size: 15px; }
}

/* ===== 表单统一 ===== */
.form-group { margin-bottom: 20px; }

.form-group label {
    display: block;
    font-weight: bold;
    margin-bottom: 8px;
    color: #444;
    font-size: 14px;
}

.form-group label .hint {
    font-weight: normal;
    color: var(--color-hint);
    font-size: 12px;
}

.form-input,
.form-textarea,
.input-area {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.input-area {
    margin-bottom: 20px;
    resize: vertical;
}

.form-input:focus,
.form-textarea:focus,
.input-area:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.15);
}

@media (min-width: 768px) {
    .form-group { margin-bottom: 22px; }
}

/* ===== 按钮统一：完整版旧类向 .btn 体系对齐 ===== */
.start-btn,
.nav-btn,
.copy-btn,
.share-btn,
.restart-btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.2s;
}

.start-btn {
    width: 100%;
    background: var(--color-primary);
    color: #fff;
    font-weight: bold;
    margin-top: 16px;
}

.start-btn:hover { background: var(--color-primary-dark); }

.start-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.nav-btn {
    background: var(--color-gray);
    color: #fff;
    flex: 1;
}

.nav-btn:hover:not(:disabled) { background: var(--color-gray-dark); }

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.nav-btn.primary { background: var(--color-primary); }

.nav-btn.primary:hover { background: var(--color-primary-dark); }

.copy-btn {
    background: var(--color-success);
    color: #fff;
    flex: 1;
}

.copy-btn:hover { background: var(--color-success-dark); }

.share-btn {
    background: var(--color-purple);
    color: #fff;
    flex: 1;
}

.share-btn:hover { background: var(--color-purple-dark); }

.restart-btn {
    background: var(--color-danger);
    color: #fff;
    flex: 1;
}

.restart-btn:hover { background: var(--color-danger-dark); }

.save-image-btn,
.close-modal-btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
}

.save-image-btn {
    background: var(--color-success);
    color: #fff;
}

.save-image-btn:hover { background: var(--color-success-dark); }

.close-modal-btn {
    background: var(--color-gray);
    color: #fff;
}

.close-modal-btn:hover { background: var(--color-gray-dark); }

@media (min-width: 768px) {
    .start-btn,
    .nav-btn,
    .copy-btn,
    .share-btn,
    .restart-btn { padding: 13px 28px; }
}

/* ===== 顶部胶囊按钮 ===== */
.buy-btn,
.logout-btn,
.btn-ghost {
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    transition: all 0.2s;
}

.buy-btn {
    background: var(--color-success);
    color: #fff;
    border: none;
}

.buy-btn:hover { background: var(--color-success-dark); }

.logout-btn {
    background: var(--color-danger);
    color: #fff;
    border: none;
}

.logout-btn:hover { background: var(--color-danger-dark); }

.btn-ghost {
    background: #fff;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.btn-ghost:hover {
    background: var(--color-topbar);
    color: var(--color-text);
}

/* ===== 卡片圆角统一 ===== */
.blueprint { border-radius: var(--radius-md); }

.card,
.question-card,
.level-card,
.record-item,
.trend-section { border-radius: var(--radius-lg); }

.modal-container,
.image-modal-content { border-radius: var(--radius-lg); }

/* ===== 按钮组统一 ===== */
.btn-group,
.action-buttons {
    gap: 10px;
    margin-top: 16px;
}

@media (max-width: 600px) {
    .btn-group,
    .action-buttons { flex-direction: column; }
}

/* ===== 空状态统一 ===== */
.empty-state .empty-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

/* ===== 返回首页链接（三页共用，替代重复内联样式） ===== */
.link-return {
    display: inline-block;
    text-decoration: none;
    color: var(--color-hint);
    font-size: 13px;
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    transition: all 0.2s;
}

.link-return:hover {
    color: var(--color-text-secondary);
    border-color: #bbb;
}

/* ===== 公众号页脚（四页共用）：普通内容，不悬浮、不遮挡 ===== */
.wechat-badge {
    display: block;
    margin: 10px auto 0;
    padding: 12px;
    text-align: center;
    font-size: 12px;
    line-height: 1.4;
    color: #aaa;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    transition: color 0.2s;
}

.wechat-badge:hover { color: #777; }

/* ===== 分享链接区块统一 ===== */
.share-link-box {
    margin-top: 16px;
    padding: 12px;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
}

.share-link-box p,
.share-link-box .share-hint {
    margin: 0 0 8px;
    font-size: 13px;
    color: var(--color-text-secondary);
}

.share-link-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.share-link-input {
    flex: 1;
    min-width: 0;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #f9f9f9;
    font-size: 13px;
    color: var(--color-text-body);
    font-family: inherit;
}

.share-copy-btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--color-primary);
    color: #fff;
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.share-copy-btn:hover { background: var(--color-primary-dark); }