/* marketing.css - bề mặt "vỏ không khí": hero, ambient, grid series, cards. */

@keyframes ca-drift { 0%{transform:translateY(0);opacity:0} 12%{opacity:.7} 88%{opacity:.5} 100%{transform:translateY(-150px);opacity:0} }
@keyframes ca-smoke { 0%{transform:translateY(0) scaleX(1);opacity:0} 22%{opacity:.5} 100%{transform:translateY(-120px) scaleX(1.7);opacity:0} }
@keyframes ca-ember { 0%,100%{opacity:.5;transform:scale(1)} 50%{opacity:.85;transform:scale(1.06)} }
@keyframes sigil-orbit { 0%,100%{transform:rotateY(-24deg) rotateX(9deg)} 50%{transform:rotateY(24deg) rotateX(-7deg)} }
@keyframes sigil-spin { to { transform: rotateZ(360deg); } }

/* HERO */
.hero { position: relative; overflow: hidden; padding: 64px 0 56px; text-align: center; }
.hero-bg { position: absolute; inset: 0; background:
  radial-gradient(70% 50% at 50% 26%, rgba(192,57,43,.12), transparent 66%),
  radial-gradient(90% 70% at 50% 120%, rgba(42,31,61,.30), transparent 60%),
  radial-gradient(100% 80% at 50% 0%, #1a1411 0%, var(--bg-void) 72%); }
.hero-grain { position: absolute; inset: 0; pointer-events: none; opacity: .06; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%22160%22 height=%22160%22%3E%3Cfilter id=%22n%22%3E%3CfeTurbulence type=%22fractalNoise%22 baseFrequency=%220.8%22 numOctaves=%222%22 stitchTiles=%22stitch%22/%3E%3C/filter%3E%3Crect width=%22160%22 height=%22160%22 filter=%22url(%23n)%22/%3E%3C/svg%3E"); }
.hero-smoke span { position: absolute; bottom: 0; width: 60px; height: 170px; pointer-events: none; filter: blur(8px); }
.hero-smoke span:nth-child(1) { left: 34%; background: radial-gradient(50% 55% at 50% 100%, rgba(217,192,137,.12), transparent 72%); animation: ca-smoke 9s ease-in infinite; }
.hero-smoke span:nth-child(2) { left: 60%; height: 140px; background: radial-gradient(50% 55% at 50% 100%, rgba(224,123,60,.10), transparent 72%); animation: ca-smoke 12s ease-in 2.5s infinite; }
.hero-embers i { position: absolute; width: 3px; height: 3px; border-radius: 50%; background: var(--ember); box-shadow: 0 0 7px var(--ember); opacity: 0; }
.hero-embers i:nth-child(1){left:18%;bottom:30px;animation:ca-drift 8s ease-in infinite}
.hero-embers i:nth-child(2){left:36%;bottom:60px;width:2px;height:2px;background:var(--gold-soft);box-shadow:0 0 6px var(--gold);animation:ca-drift 11s ease-in 1.5s infinite}
.hero-embers i:nth-child(3){left:58%;bottom:20px;animation:ca-drift 9.5s ease-in 3s infinite}
.hero-embers i:nth-child(4){left:74%;bottom:80px;width:2px;height:2px;background:var(--gold);box-shadow:0 0 6px var(--gold);animation:ca-drift 12s ease-in .8s infinite}
.hero-embers i:nth-child(5){left:88%;bottom:40px;animation:ca-drift 10s ease-in 2.2s infinite}

.hero-inner { position: relative; z-index: 2; }
.hero-sigil { position: relative; width: 244px; height: 244px; margin: 0 auto 6px; perspective: 1100px; }
.hero-sigil::before { content: ''; position: absolute; inset: 4%; border-radius: 50%; background: radial-gradient(circle, rgba(194,161,77,.20), rgba(192,57,43,.05) 45%, transparent 64%); animation: ca-ember 6.5s ease-in-out infinite; }
.sigil-orbit { position: absolute; inset: 0; transform-style: preserve-3d; animation: sigil-orbit 16s ease-in-out infinite; }
.sigil-layer { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; transform-style: preserve-3d; }
.sigil-far { transform: translateZ(-46px); opacity: .8; }
.sigil-far svg { animation: sigil-spin 100s linear infinite; }
.sigil-main { transform: translateZ(0); }
.sigil-main .emblem-sigil { filter: drop-shadow(0 0 10px rgba(194,161,77,.28)); animation: sigil-spin 140s linear infinite reverse; }
.sigil-near { transform: translateZ(44px); }
.sigil-near svg { animation: sigil-spin 64s linear infinite; }
.hero-eyebrow { color: var(--gold-soft); font-size: 12px; letter-spacing: .24em; text-transform: uppercase; margin: 8px 0 10px; }
.hero-title { font-size: clamp(34px, 6vw, 60px); color: var(--ink-bone); line-height: 1.12; margin: 0 auto; max-width: 16ch; }
.hero-sub { color: var(--ink-ash); font-size: 15px; line-height: 1.65; margin: 16px auto 0; max-width: 46ch; }
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 26px; }

/* SECTION */
.section { padding: 48px 20px 8px; }
.section-head { display: flex; align-items: center; gap: 16px; margin-bottom: 26px; }
.section-head .rule { flex: 1; height: 1px; background: var(--line-gold); }
.section-head h2 { font-size: 22px; color: var(--gold-soft); letter-spacing: .04em; }

/* SERIES GRID */
.series-grid { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; grid-template-columns: repeat(2, 1fr); }
@media (min-width: 560px) { .series-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 860px) { .series-grid { grid-template-columns: repeat(5, 1fr); } }
.scard { display: flex; flex-direction: column; align-items: center; text-align: center; background: var(--bg-surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 20px 14px; transition: transform .18s ease, border-color .2s ease, box-shadow .25s ease; }
.scard:hover { transform: translateY(-4px); border-color: var(--line-gold); box-shadow: 0 18px 40px -24px rgba(0,0,0,.8), 0 0 26px -16px var(--accent, var(--gold)); }
.scard-emblem { margin-bottom: 12px; }
.scard-name { font-family: var(--font-display); font-size: 18px; font-weight: 600; color: var(--ink-bone); line-height: 1.1; }
.scard-pin { color: var(--ink-faint); font-size: 11.5px; letter-spacing: .04em; margin-top: 5px; display: inline-flex; align-items: center; gap: 4px; }
.scard-genre { color: var(--gold-soft); font-size: 11.5px; letter-spacing: .1em; text-transform: uppercase; margin-top: 6px; }
.scard-logline { color: var(--ink-ash); font-size: 12.5px; line-height: 1.5; margin-top: 9px; min-height: 50px; }
.scard--locked { color: var(--ink-faint); }

/* Shelf + rank variants */
.scard--shelf { flex: none; width: 132px; align-items: stretch; background: none; border: none; padding: 0; }
.scard-cover { position: relative; height: 168px; border-radius: var(--radius-md); background: linear-gradient(160deg,#241a16,#0c0a0b); border: 1px solid var(--line); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.scard-cover::after { content:''; position:absolute; inset:0; background: radial-gradient(80% 60% at 50% 30%, rgba(194,161,77,.10), transparent 70%); }
.scard--shelf .scard-name { margin-top: 8px; font-size: 15.5px; }
.scard--shelf .scard-genre { margin-top: 2px; }
.scard--rank { flex-direction: row; align-items: center; gap: 13px; background: none; border: none; border-bottom: 1px solid var(--line); border-radius: 0; padding: 9px 6px; text-align: left; }
.scard-rankno { font-family: var(--font-display); font-weight: 600; width: 24px; text-align: center; color: var(--ink-faint); }
.scard-cover--mini { width: 38px; height: 50px; flex: none; }
.scard-rankmeta { display: flex; flex-direction: column; }
/* Ảnh bìa poster cho thẻ grid + overlay ảnh (fallback emblem nếu chưa có ảnh) */
.scard--grid .scard-cover { width: 100%; height: auto; aspect-ratio: 2 / 3; margin-bottom: 12px; }
.scard-cover .scard-emblem { margin: 0; }
.scard-cover-img { position: absolute; inset: 0; background-size: cover; background-position: center; border-radius: inherit; z-index: 1; }
.scard-cover .seal-badge { z-index: 2; }
/* Rail ngang trang chủ (HOT / Mới cập nhật) */
.series-rail-sec { padding-top: 6px; }
.rail-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 12px; }
.rail-title { font-family: var(--font-display); font-size: 20px; font-weight: 600; color: var(--ink-bone); }
.rail-sub { font-size: 12px; color: var(--ink-faint); letter-spacing: .04em; }
.series-rail { list-style: none; margin: 0; padding: 0 0 8px; display: flex; gap: 14px; overflow-x: auto; scroll-snap-type: x proximity; }
.series-rail > li { scroll-snap-align: start; flex: 0 0 auto; }

/* "Tiếp tục đọc" - return hub (guest + logged-in) */
.continue-sec { padding-top: 8px; }
.continue-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 600px) { .continue-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 920px) { .continue-grid { grid-template-columns: repeat(3, 1fr); } }
.continue-card {
  display: flex; gap: 12px; align-items: center; padding: 10px;
  border: 1px solid var(--line); border-radius: var(--radius-md);
  background: radial-gradient(130% 100% at 0% 0%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 60%), color-mix(in srgb, var(--bg-void) 30%, transparent);
  text-decoration: none; transition: border-color .18s ease, transform .18s ease;
}
.continue-card:hover { border-color: var(--line-gold); transform: translateY(-2px); }
.continue-cover {
  flex: none; width: 48px; aspect-ratio: 2 / 3; position: relative; overflow: hidden;
  border-radius: var(--radius-sm); background: linear-gradient(160deg, #241a16, #0c0a0b);
  display: flex; align-items: center; justify-content: center;
}
.continue-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.continue-eyebrow { font-family: var(--font-ui); font-size: 11px; letter-spacing: .04em; text-transform: uppercase; color: var(--gold-soft); }
.continue-name { font-family: var(--font-display); font-size: 1.02rem; color: var(--ink-bone); line-height: 1.15; }
.continue-ct { font-size: 0.82rem; color: var(--ink-ash); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
/* Arc collapse (gom 20 chương/Arc; Arc 1 mở sẵn) */
.arc-list { display: flex; flex-direction: column; gap: 12px; }
.arc { border: 1px solid var(--line); border-radius: var(--radius-md); overflow: hidden; background: var(--bg-surface); }
.arc-head { display: flex; align-items: center; gap: 10px; padding: 12px 16px; cursor: pointer; list-style: none; user-select: none; }
.arc-head::-webkit-details-marker { display: none; }
.arc-name { font-family: var(--font-display); font-size: 16px; font-weight: 600; color: var(--ink-bone); }
.arc-count { color: var(--ink-faint); font-size: 12px; letter-spacing: .04em; }
.arc-caret { margin-left: auto; color: var(--ink-ash); transition: transform .2s ease; }
.arc[open] .arc-caret { transform: rotate(180deg); }
.arc .chapter-list { margin: 0; padding: 0 8px 8px; }
.arc-head:hover .arc-name { color: var(--gold-soft); }
/* Nội dung server-render (SSR SEO) - style tối thiểu cho crawler/no-JS + đỡ nhấp nháy trước khi client render đè */
.ssr-seo { max-width: 44rem; margin: 0 auto; padding: 2rem 1.1rem; }
.ssr-seo h1 { font-family: var(--font-display); color: var(--ink-bone); }
.ssr-seo h2 { font-family: var(--font-display); color: var(--ink-bone); margin-top: 1.4rem; }
.ssr-seo p { line-height: 1.7; color: var(--ink-ash); }
.ssr-seo a { color: var(--gold-soft); }
.ssr-seo dt { color: var(--ink-faint); font-size: .85rem; margin-top: .5rem; }
.ssr-bc { color: var(--ink-faint); font-size: .85rem; margin-bottom: .6rem; }

/* Dấu triện son (badge) */
.seal-badge { position: absolute; top: 9px; left: 9px; z-index: 2; font-size: 11.5px; font-weight: 600; padding: 3px 8px; border-radius: 3px; letter-spacing: .07em; text-transform: uppercase; border: 1px solid rgba(236,228,214,.22); box-shadow: 0 1px 3px rgba(0,0,0,.4); transform: rotate(-3deg); }
.seal-badge--hot { background: var(--blood); color: var(--ink-bone); }
.seal-badge--new { background: rgba(224,123,60,.18); color: var(--ember); }

/* PROOF */
.proof { display: flex; justify-content: center; gap: 40px; padding: 40px 20px; }
.proof-num { display: block; font-family: var(--font-display); font-size: 28px; color: var(--gold-soft); }
.proof-label { color: var(--ink-faint); font-size: 12px; }

/* Giảm ambient trên mobile / dữ liệu tiết kiệm (PERF).
   SỬA 26/7: trước đây gộp 1 rule -> khói + 3/5 tàn lửa bị TẮT cho MỌI thiết bị cảm ứng = 81% traffic,
   tức đúng nhóm khách được hứa "rùng rợn" lại thấy hero tĩnh nhất. Tách 2 tầng:
   (1) mobile: GIỮ khói/tàn lửa (chạy trên compositor, rẻ), chỉ tắt 3D sigil (perspective + preserve-3d mới đắt);
   (2) reduced-data: tắt HẾT như cũ, tôn trọng ý người dùng đã chủ động xin tiết kiệm dữ liệu. */
@media (hover: none), (pointer: coarse) {
  .sigil-orbit, .sigil-layer svg, .sigil-main .emblem-sigil { animation: none; }
  .hero-sigil::before { animation: none; }
}
@media (prefers-reduced-data: reduce) {
  .hero-smoke, .hero-embers i:nth-child(n+3) { display: none; }
  .sigil-orbit, .sigil-layer svg, .sigil-main .emblem-sigil { animation: none; }
  .hero-sigil::before { animation: none; }
}

/* Blog / bài viết (/bai-viet) */
.blog-bc { font-size: 13px; color: var(--ink-faint); margin-bottom: 14px; }
.blog-bc a { color: var(--gold-soft); }
.blog-intro { color: var(--ink-ash); margin: -6px 0 22px; font-size: 15px; }
.blog-list { list-style: none; display: grid; gap: 14px; padding: 0; }
.blog-card { display: flex; flex-direction: column; gap: 6px; padding: 18px 20px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--bg-surface); transition: border-color .2s ease, transform .15s ease; }
.blog-card:hover { border-color: var(--line-gold); transform: translateY(-2px); }
.blog-card-title { font-family: var(--font-display); font-size: 19px; color: var(--gold-soft); }
.blog-card-desc { font-size: 13.5px; color: var(--ink-faint); line-height: 1.5; }
.blog-cta { margin-top: 28px; padding: 18px 22px; border: 1px solid var(--line-gold); border-radius: var(--radius-lg); background: linear-gradient(180deg, var(--bg-raised), var(--bg-surface)); }
.blog-cta a { color: var(--gold); text-decoration: underline; text-underline-offset: 2px; }