/* ═══════════════════════════════════════
   MAGICTRIP — Essentials Survival Guide
   ═══════════════════════════════════════ */

/* ── Chapter Hero (overrides page-hero for chapter pages) ── */
.page-hero.chapter-hero {
    height: 44vh;
    min-height: 420px;
    max-height: 520px;
}
.page-hero.chapter-hero h1 { font-size: 2.4rem; }
.page-hero.chapter-hero .ch-num { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 3px; opacity: 0.6; margin-bottom: 8px; }
.page-hero.chapter-hero .btn-outline { color: #fff !important; border-color: rgba(255,255,255,0.3); background: transparent !important; }
.page-hero.chapter-hero .btn-outline:hover { color: #fff !important; background: var(--c-primary) !important; border-color: var(--c-primary) !important; }
.page-hero.chapter-hero .btn-outline svg { transition: transform 0.3s ease; vertical-align: middle; }
.page-hero.chapter-hero .btn-outline svg:first-child { transform: scaleX(-1); }
.page-hero.chapter-hero .btn-outline:hover svg:first-child { transform: scaleX(-1) translateX(3px); }
.page-hero-bg { object-position: center; }

/* ── Visa Checker Modal ── */
.visa-checker-btn { text-align: center; margin-top: 24px; }
.visa-modal-overlay {
    position: fixed; inset: 0; z-index: 9999;
    background: rgba(0,0,0,0.5); display: none;
    align-items: center; justify-content: center;
    backdrop-filter: blur(4px);
}
.visa-modal-overlay.show { display: flex; }
.visa-modal {
    background: #fff; border-radius: var(--radius-lg);
    max-width: 520px; width: 90%; max-height: 90vh; overflow-y: auto;
    padding: 36px 32px 28px; box-shadow: 0 25px 60px rgba(0,0,0,0.3);
    position: relative; animation: modalIn 0.25s ease;
}
@keyframes modalIn { from { opacity:0; transform:translateY(20px) scale(0.96); } to { opacity:1; transform:translateY(0) scale(1); } }
.visa-modal-close {
    position: absolute; top: 12px; right: 16px; font-size: 24px;
    cursor: pointer; color: var(--c-text-muted); background: none; border: none;
    line-height: 1; padding: 4px;
}
.visa-modal-close:hover { color: var(--c-text); }
.visa-modal h2 { font-size: 1.3rem; font-weight: 700; margin-bottom: 4px; }
.visa-modal .vm-sub { font-size: 0.85rem; color: var(--c-text-dim); margin-bottom: 20px; }
.visa-modal label { display: block; font-size: 0.82rem; font-weight: 600; margin-bottom: 4px; color: var(--c-text-secondary); }
.visa-modal select, .visa-modal input[type="checkbox"] { margin-bottom: 14px; }
.visa-modal select {
    width: 100%; padding: 10px 14px; border: 1px solid var(--c-border);
    border-radius: var(--radius-md); font-size: 0.9rem; font-family: var(--font-body);
    background: #fff; appearance: auto; color: var(--c-text);
}
.visa-modal .vm-check { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.visa-modal .vm-check label { margin-bottom: 0; cursor: pointer; }
.visa-modal .vm-check input { width: 18px; height: 18px; cursor: pointer; }
.visa-result {
    margin-top: 16px; padding: 16px 20px; border-radius: var(--radius-md);
    display: none; line-height: 1.6;
}
.visa-result.show { display: block; }
.visa-result.vr-ok { background: #f0fdf4; border: 1px solid #86efac; }
.visa-result.vr-warn { background: #fffbeb; border: 1px solid #fcd34d; }
.visa-result.vr-no { background: #fef2f2; border: 1px solid #fca5a5; }
.visa-result h3 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.visa-result p { font-size: 0.88rem; color: var(--c-text-secondary); }
.visa-result .vr-note { margin-top: 8px; font-size: 0.78rem; color: var(--c-text-muted); }

/* ── Chapter Sub-Nav (sticky chapter switcher) ── */
.chapter-nav-wrap {
    position: relative; z-index: 99;
}
.chapter-nav {
    display: flex; align-items: center; gap: 2px;
    background: #1a1a2e; padding: 8px 16px;
    overflow-x: auto; scrollbar-width: none;
    justify-content: center;
    width: 100%;
    transition: box-shadow 0.3s;
    -webkit-overflow-scrolling: touch;
}
@media (max-width: 768px) {
    .chapter-nav { justify-content: flex-start; padding: 8px 12px; }
    .chapter-nav-item { padding: 6px 12px; font-size: 0.78rem; }
}
.chapter-nav::-webkit-scrollbar { display: none; }
.chapter-nav.sticky {
    position: fixed; top: var(--nav-height); left: 0; right: 0;
    z-index: 999; box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.chapter-nav-item {
    color: rgba(255,255,255,0.55); text-decoration: none !important;
    padding: 6px 14px; font-size: 0.8rem; font-weight: 500;
    white-space: nowrap; border-radius: 6px;
    transition: all 0.2s; font-family: var(--font-display);
}
.chapter-nav-item:hover { color: #fff; background: rgba(255,255,255,0.1); }
.chapter-nav-item.active { color: #fff; background: var(--c-primary); }

/* ── Guide Card (Q&A format) ── */
.guide-card {
    background: #fff; border: 1px solid var(--c-border);
    border-radius: var(--radius-lg); padding: 28px 32px;
    margin-bottom: 20px; box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s;
}
.guide-card:hover { box-shadow: var(--shadow-md); }
.guide-card .q {
    font-size: 1.05rem; font-weight: 700; color: var(--c-primary);
    margin-bottom: 12px; display: flex; align-items: center; gap: 8px;
}
.guide-card .a { font-size: 0.95rem; line-height: 1.8; color: var(--c-text-secondary); }
.guide-card .a p { margin-bottom: 10px; }

/* ── Tips & Warnings ── */
.guide-tip, .guide-warn {
    padding: 14px 18px; border-radius: var(--radius-md);
    margin: 14px 0 0; font-size: 0.88rem; line-height: 1.7;
}
.guide-tip { background: #f0f7f0; border-left: 4px solid #86efac; }
.guide-warn { background: #fffbeb; border-left: 4px solid #fcd34d; }
.guide-tip strong, .guide-warn strong { display: block; margin-bottom: 4px; color: var(--c-text); }

/* ── Image Placeholder ── */
.guide-img {
    background: var(--c-bg-alt); border: 2px dashed var(--c-border);
    border-radius: var(--radius-md); padding: 24px;
    text-align: center; color: var(--c-text-muted); font-size: 0.85rem;
    margin: 14px 0;
}
.guide-img .img-label { font-weight: 600; color: var(--c-text-dim); margin-bottom: 4px; }
.guide-img .img-desc { font-size: 0.78rem; color: var(--c-text-muted); }

/* ── Audio Button ── */
.audio-btn {
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--c-primary); color: #fff; border: none;
    width: 24px; height: 24px; border-radius: 50%; cursor: pointer;
    font-size: 12px; flex-shrink: 0; transition: background 0.2s;
    vertical-align: middle; line-height: 1;
}
.audio-btn:hover { background: var(--c-primary-dark); }
.audio-btn.playing { background: #d94f4f; animation: pulse 0.6s infinite; }
@keyframes pulse { 0%,100%{transform:scale(1)} 50%{transform:scale(1.15)} }

/* ── Phrase Table ── */
.guide-phrases {
    background: var(--c-bg-alt); border: 1px solid var(--c-border);
    border-radius: var(--radius-lg); padding: 28px 32px; margin-top: 40px;
}
.guide-phrases h3 { font-size: 1.1rem; margin-bottom: 4px; color: var(--c-text); }
.guide-phrases .ph-sub { font-size: 0.82rem; color: var(--c-text-muted); margin-bottom: 16px; }
.ph-table { width: 100%; border-collapse: collapse; }
.ph-table td {
    padding: 10px 12px; border-bottom: 1px solid var(--c-border);
    vertical-align: middle; font-size: 0.88rem;
}
.ph-table tr:last-child td { border-bottom: none; }
.ph-table .ph-hanzi { font-size: 1.1rem; font-weight: 700; color: var(--c-text); white-space: nowrap; }
.ph-table .ph-pinyin { font-size: 0.78rem; color: var(--c-text-muted); }
.ph-table .ph-meaning { font-size: 0.82rem; color: var(--c-text-dim); text-align: right; }

/* ── App Grid ── */
.app-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px; margin: 14px 0;
}
.app-item {
    background: var(--c-bg-alt); border: 1px solid var(--c-border);
    border-radius: var(--radius-md); padding: 16px; text-align: center;
}
.app-item .app-icon {
    font-size: 28px; margin-bottom: 8px;
    background: #fff; border-radius: var(--radius-sm);
    padding: 10px;
}
.app-item .app-icon .ph { height: 40px; display: flex; align-items: center; justify-content: center; }
.app-item .app-name { font-weight: 600; font-size: 0.88rem; }
.app-item .app-desc { font-size: 0.75rem; color: var(--c-text-muted); margin-top: 2px; }

/* ── Quick Word Grid ── */
.quick-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px; margin-top: 14px;
}
.quick-item {
    background: var(--c-bg-alt); border: 1px solid var(--c-border);
    border-radius: var(--radius-md); padding: 12px 16px;
}
.quick-item .qw-hanzi { font-size: 1.1rem; font-weight: 700; color: var(--c-text); }

/* ── Essentials Hero (landing) ── */
.essentials-hero {
    position: relative; min-height: 55vh;
    display: flex; align-items: center; justify-content: center;
    text-align: center; color: #fff; overflow: hidden;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f3460 100%);
    margin-top: var(--nav-height);
}
.essentials-hero::after {
    content: ""; position: absolute; inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(138,93,225,0.15), transparent 60%);
}
.essentials-hero .container { position: relative; z-index: 2; padding: 60px 32px; }
.essentials-hero h1 { font-size: 3.2rem; font-weight: 800; margin-bottom: 12px; }
.essentials-hero .hero-sub { font-family: var(--font-serif); font-size: 1.2rem; opacity: 0.85; margin-bottom: 8px; }
.essentials-hero .hero-desc { font-size: 1.05rem; max-width: 640px; margin: 0 auto 24px; opacity: 0.75; line-height: 1.7; }

/* ── Chapter Grid (Pearson-style cards) ── */
.chapter-grid {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 24px; max-width: var(--max-width); margin: 40px auto 0;
    padding: 0 32px;
}
.chapter-card {
    background: #fff; border: 1px solid var(--c-border);
    border-radius: var(--radius-lg); overflow: hidden;
    text-decoration: none; color: inherit !important;
    display: flex; flex-direction: column; min-height: 420px;
    transition: transform 0.4s cubic-bezier(0.4,0,0.2,1), box-shadow 0.4s ease;
}
.chapter-card:hover { transform: translateY(-6px); box-shadow: 0 20px 40px rgba(0,0,0,0.12); border-color: transparent; }
.chapter-card:hover h2 { color: var(--c-primary); }
.chapter-card-top {
    flex: 1; padding: 28px 24px 18px;
    display: flex; flex-direction: column;
}
.chapter-card .num { font-size: 0.72rem; color: var(--c-primary); font-weight: 700; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 1.5px; }
.chapter-card h2 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; line-height: 1.3; }
.chapter-card p { font-size: 0.82rem; color: var(--c-text-dim); line-height: 1.65; flex: 1; }
.chapter-card-cta {
    font-size: 0.85rem; font-weight: 600; color: var(--c-primary);
    margin-top: 12px; display: flex; align-items: center; gap: 4px;
    transition: gap 0.3s ease;
}
.chapter-card:hover .chapter-card-cta { gap: 10px; }
.chapter-card:hover .chapter-card-cta svg { transform: translateX(2px); }
.chapter-card-cta svg { transition: transform 0.3s ease; }
.chapter-card-img {
    height: 200px; overflow: hidden; flex-shrink: 0;
    background: var(--c-bg-alt);
}
.chapter-card-img img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4,0,0.2,1);
}
.chapter-card:hover .chapter-card-img img { transform: scale(1.08); }

/* ── CTA section overrides for essentials page ── */
.essentials-page .cta-section { margin-top: 80px; }

/* ── Responsive ── */
@media (max-width: 1024px) {
    .chapter-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .essentials-hero h1 { font-size: 2rem; }
    .chapter-hero h1 { font-size: 1.8rem; }
    .guide-card { padding: 20px; }
    .guide-phrases { padding: 20px; }
    .ph-table td { display: block; text-align: left !important; padding: 4px 0; border-bottom: none; }
    .ph-table tr { border-bottom: 1px solid var(--c-border); padding: 8px 0; display: block; }
    .ph-table .ph-meaning { text-align: left !important; }
    .app-grid { grid-template-columns: repeat(3, 1fr); }
    .chapter-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .app-grid { grid-template-columns: repeat(2, 1fr); }
    .quick-grid { grid-template-columns: 1fr; }
    .chapter-grid { grid-template-columns: 1fr; }
    .chapter-card { aspect-ratio: auto; max-height: none; }
}