/* =========================================================
   爛泥的生存祕笈 — 共用基礎樣式（與其他頁面一致）
   ========================================================= */
:root {
    --primary-color: #4a6fa5;
    --secondary-color: #166088;
    --accent-color: #f47c7c;
    --light-bg: #f8f9fa;
    --dark-bg: #343a40;
    --text-color: #212529;
    --text-secondary: #6c757d;
    --light-text: #f8f9fa;

    --border-color: #e1e4e8;
    --nav-height: 60px;
    --font-stack: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

* { box-sizing: border-box; }

body {
    font-family: var(--font-stack);
    line-height: 1.8;
    color: var(--text-color);
    background-color: white;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    padding-top: var(--nav-height);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-height);
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 1000;
}

.site-logo {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--dark-bg);
    text-decoration: none;
    letter-spacing: 0.5px;
    transition: color 0.2s;
    -webkit-tap-highlight-color: transparent;
}
@media (hover: hover) {
    .site-logo:hover { color: var(--primary-color); }
}
.site-logo:active { color: var(--primary-color); }

.site-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
    -webkit-tap-highlight-color: transparent;
}
@media (hover: hover) {
    .site-nav a:hover { color: var(--primary-color); }
}
.site-nav a:active { color: var(--primary-color); }

.site-footer {
    background-color: var(--dark-bg);
    color: var(--light-text);
    padding: 1.5rem;
    margin-top: 4rem;
    text-align: center;
    font-size: 0.9rem;
}
.site-footer p { color: var(--light-text); font-size: 0.9rem; margin-bottom: 0.5rem; }
.site-footer a { color: var(--light-text); margin: 0 0.5rem; text-decoration: none; opacity: 0.8; transition: opacity 0.2s; }
.site-footer a:hover { color: white; opacity: 1; text-decoration: none; }

code {
    font-family: inherit;
    font-weight: 700;
    color: var(--secondary-color);
    background-color: rgba(74, 111, 165, 0.1);
    padding: 0.1em 0.4em;
    border-radius: 4px;
    font-size: 0.95em;
}

hr {
    border: 0;
    height: 3px;
    background-color: var(--accent-color);
    width: 70px;
    margin: 0.5rem 0 1rem 0;
    border-radius: 2px;
}

a { color: var(--secondary-color); }

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-in { opacity: 0; animation: fadeInUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.5s; }
.delay-4 { animation-delay: 0.6s; }

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    .animate-in { animation: none; opacity: 1; }
    html { scroll-behavior: auto; }
}

/* =========================================================
   本頁專屬樣式：推薦碼統整頁
   ========================================================= */

.container {
    max-width: 1040px;
    margin: 0 auto;
    padding: 4rem 1.5rem 2rem 1.5rem;
    flex: 1;
    width: 100%;
}

.page-intro { padding-bottom: 0.5rem; }
.page-title { font-size: 2rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--text-color); }
.page-subtitle { color: var(--text-secondary); font-size: 1.1rem; margin: 0; }

/* --- 版面：側邊分類選單 + 內容 --- */
.hub-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2.5rem;
    align-items: start;
}

/* 分類選單（桌機：側邊直立；手機：頂部橫向可滑動） */
.category-nav {
    position: sticky;
    top: calc(var(--nav-height) + 1.5rem);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.category-nav a {
    display: block;
    padding: 0.6rem 0.9rem;
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    transition: background-color 0.2s, color 0.2s;
    -webkit-tap-highlight-color: transparent;
}
.category-nav a .count {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 0.85em;
    margin-left: 0.3em;
}
@media (hover: hover) {
    .category-nav a:hover { background-color: var(--light-bg); color: var(--primary-color); }
}
.category-nav a.is-active {
    background-color: rgba(74, 111, 165, 0.1);
    color: var(--secondary-color);
}

.hub-sections { display: flex; flex-direction: column; gap: 4rem; min-width: 0; }

.category-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin: 0 0 0.4rem 0;
    scroll-margin-top: calc(var(--nav-height) + 1rem);
}
.category-section .category-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    margin: 0 0 1.5rem 0;
    max-width: 62ch;
}

/* 推薦碼卡片 */
.code-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
}

.code-card {
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}
.code-card-name { color: var(--text-color); }

.code-card-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0;
}
.code-card-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

.code-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    background-color: var(--light-bg);
    border-radius: 10px;
    padding: 0.5rem 0.5rem 0.5rem 0.9rem;
}
.code-row .code-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    font-weight: 600;
    margin-right: 0.5rem;
}
.code-row code {
    background: none;
    padding: 0;
    font-size: 1rem;
}
.copy-btn {
    border: 1px solid var(--border-color);
    background-color: white;
    color: var(--secondary-color);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.35rem 0.7rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s;
    flex-shrink: 0;
}
.copy-btn:hover { background-color: white; border-color: var(--primary-color); color: var(--primary-color); }
.copy-btn.is-copied { background-color: var(--secondary-color); border-color: var(--secondary-color); color: white; }

.code-card-link {
    align-self: flex-end;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    padding: 0.5rem 0.9rem;
    border-radius: 10px;
    transition: background-color 0.2s ease;
    -webkit-tap-highlight-color: transparent;
}
@media (hover: hover) {
    .code-card-link:hover {
        background-color: var(--light-bg);
        text-decoration: none;
    }
    .code-card-link:hover i { transform: translateX(3px); }
}
.code-card-link:active { background-color: #e9ecef; }
.code-card-link i { transition: transform 0.2s; }

/* 免責聲明 */
.disclaimer-box {
    background-color: var(--light-bg);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent-color);
    border-radius: 16px;
    padding: 1.1rem 1.4rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}
.disclaimer-box strong { color: var(--text-color); }

/* 分類內的子群組（例如「國際交易所」「國內交易所」） */
.subgroup-heading {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0 0 1rem 0;
}
.subgroup-heading .subgroup-note {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-left: 0.4em;
}
.category-section .code-grid + .subgroup-heading { margin-top: 2.5rem; }

/* 尚未填入推薦碼的卡片（結構先排好，等資料補上） */
.code-card.is-pending {
    border-style: dashed;
    color: var(--text-secondary);
}
.code-card.is-pending .pending-note {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
    margin: 0;
}

/* 空狀態（分類尚未整理完成） */
.empty-state {
    border: 1px dashed var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}
.empty-state strong { color: var(--text-color); }

/* --- RWD --- */
@media (max-width: 760px) {
    .container { padding: 2rem 1.25rem; }
    .hub-layout { grid-template-columns: 1fr; gap: 1.5rem; }
    .category-nav {
        position: sticky;
        top: var(--nav-height);
        flex-direction: row;
        overflow-x: auto;
        gap: 0.5rem;
        padding: 0.75rem 0;
        background: rgba(255,255,255,0.98);
        border-bottom: 1px solid var(--border-color);
        -webkit-overflow-scrolling: touch;
        z-index: 10;
    }
    .category-nav a { white-space: nowrap; flex-shrink: 0; }
    .hub-sections { gap: 3rem; }
    .site-header { padding: 0 1rem; }
}