/* ============================================
   百宝箱 - 实用小工具集合
   ============================================ */

:root {
    --bg: #f6f4f0;
    --surface: #fdfcfa;
    --fg: #333028;
    --muted: #7a7568;
    --border: #e0ddd6;
    --accent: #a07840;
    --accent-light: #f0e8da;
    --font-display: 'Georgia', serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--fg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
    max-width: 760px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Masthead
   ============================================ */
.masthead {
    max-width: 760px;
    margin: 0 auto;
    padding: 24px 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.wordmark {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--fg);
}

.wordmark span { color: var(--accent); }

.masthead-nav a {
    font-size: 0.85rem;
    color: var(--muted);
    transition: color 0.15s;
}

.masthead-nav a:hover { color: var(--fg); }

/* ============================================
   Homepage Hero
   ============================================ */
.home-hero {
    max-width: 760px;
    margin: 0 auto;
    padding: 64px 24px 48px;
    text-align: center;
}

.home-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 500;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.home-hero p {
    font-size: 1rem;
    color: var(--muted);
}

/* ============================================
   Tool Cards (Homepage)
   ============================================ */
.tools-section {
    max-width: 760px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

.tools-grid {
    display: grid;
    gap: 16px;
}

.tool-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: all 0.2s ease;
}

.tool-card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transform: translateY(-2px);
}

.tool-icon {
    font-size: 1.75rem;
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-light);
    border-radius: 12px;
}

.tool-info h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.tool-info p {
    font-size: 0.875rem;
    color: var(--muted);
    line-height: 1.6;
    margin-bottom: 10px;
}

.tool-tag {
    font-size: 0.7rem;
    letter-spacing: 0.04em;
    color: var(--accent);
    background: var(--accent-light);
    padding: 3px 10px;
    border-radius: 20px;
}

/* ============================================
   Page Header (Tool Pages)
   ============================================ */
.page-header {
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 24px 40px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 32px;
    font-size: 0.85rem;
    color: var(--muted);
    transition: color 0.15s;
}

.back-link:hover { color: var(--fg); }

.page-header h1 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 500;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.page-header > p {
    font-size: 1rem;
    color: var(--muted);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    padding: 10px 20px;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover { opacity: 0.85; }

.btn-outline {
    background: transparent;
    color: var(--fg);
    border: 1px solid var(--border);
}

.btn-outline:hover { border-color: var(--fg); }

/* ============================================
   Checklist Tool
   ============================================ */
.tool-wrap {
    max-width: 760px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

.input-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 10px;
}

.paste-area {
    width: 100%;
    min-height: 200px;
    padding: 16px 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--fg);
    font-family: var(--font-body);
    font-size: 0.9rem;
    line-height: 1.8;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s;
}

.paste-area:focus { border-color: var(--accent); }
.paste-area::placeholder { color: var(--muted); }

.input-actions {
    display: flex;
    gap: 12px;
    margin-top: 14px;
    flex-wrap: wrap;
}

/* Summary */
.summary {
    display: flex;
    gap: 32px;
    margin-bottom: 28px;
    padding: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.summary-item { display: flex; flex-direction: column; }

.summary-num {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 500;
    color: var(--accent);
    line-height: 1.2;
}

.summary-label {
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    margin-top: 4px;
}

/* Table */
.table-wrapper {
    overflow-x: auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 4px;
}

.result-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    min-width: 400px;
}

.result-table caption {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--fg);
    padding: 16px 16px 10px;
    text-align: left;
    border-bottom: 2px solid var(--accent);
    caption-side: top;
}

.result-table th,
.result-table td {
    padding: 11px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.result-table th {
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    font-weight: 500;
}

.result-table td { color: var(--muted); }

.result-table tbody tr:hover td { background: var(--bg); }

.count-cell { color: var(--accent) !important; font-weight: 500; }

.group-row td {
    font-weight: 500;
    color: var(--fg) !important;
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    background: var(--bg);
}

.extra-cell { color: var(--accent) !important; }

.total-row td {
    border-top: 2px solid var(--accent);
    color: var(--fg) !important;
    font-weight: 500;
}

/* Export Actions */
.export-actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    max-width: 760px;
    margin: 0 auto;
    padding: 24px;
    border-top: 1px solid var(--border);
}

.footer p {
    color: var(--muted);
    font-size: 0.8rem;
    text-align: center;
}

/* ============================================
   Mobile Responsive
   ============================================ */
@media (max-width: 600px) {
    .summary { flex-direction: column; gap: 16px; }
    .input-actions, .export-actions { flex-direction: column; }
    .input-actions .btn, .export-actions .btn { width: 100%; text-align: center; }
    .tool-card { flex-direction: column; align-items: flex-start; }
}