/* =====================================================================
   ToolGamePC — Hextech / Runeterra Design System
   Thương hiệu: ToolGamePC (toolgamepc.net)
   Chuyên: Tool mod skin LOL / Liên Minh Huyền Thoại (LMHT)
   ---------------------------------------------------------------------
   Bảng màu chuẩn client Liên Minh:
   - Gold kim loại:  #C89B3C
   - Gold sáng:      #F0E6D2
   - Xanh Hextech:   #0AC8B9
   - Nền tối:        #010A13 / #091428
   ===================================================================== */

/* ------------------------- 1. Biến hệ thống ------------------------- */
:root {
  --gold:        #C89B3C;
  --gold-bright: #F0E6D2;
  --gold-dark:   #785A28;
  --gold-line:   #463714;
  --teal:        #0AC8B9;
  --teal-dark:   #005A82;
  --blue-hextech:#0397AB;

  --bg-0:  #010A13; /* nền sâu nhất */
  --bg-1:  #091428; /* panel */
  --bg-2:  #0A1428; /* panel xen kẽ */
  --bg-3:  #1E2328; /* card */
  --bg-elev: #0F1A2B;

  --text:      #F0E6D2;
  --text-soft: #A09B8C;
  --text-mute: #5B5A56;

  --border:     #3C3C41;
  --border-gold: #785A28;

  --danger: #E84057;
  --success: #0ACF83;
  --hot:    #C8443C;
  --new:    #0AC8B9;

  --grad-gold: linear-gradient(90deg, #785A28 0%, #C89B3C 25%, #C8AA6E 50%, #C89B3C 75%, #785A28 100%);
  --grad-panel: linear-gradient(180deg, #091428 0%, #0A1428 100%);
  --grad-hero: radial-gradient(ellipse at 50% 0%, #0A323C 0%, #091428 45%, #010A13 100%);

  --shadow-gold: 0 0 18px rgba(200, 155, 60, 0.35);
  --shadow-teal: 0 0 18px rgba(10, 200, 185, 0.35);

  --font-title: "Playfair Display", "Beaufort", Georgia, serif;
  --font-body:  "Inter", "Roboto", "Segoe UI", system-ui, sans-serif;

  --wrap: 1240px;
  --radius: 4px;
  --header-h: 70px;
}

/* ------------------------- 2. Reset & Base -------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--bg-0);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  /* Nền hoa văn Hextech mờ */
  background-image:
    radial-gradient(circle at 15% 10%, rgba(10, 200, 185, 0.05), transparent 35%),
    radial-gradient(circle at 85% 30%, rgba(200, 155, 60, 0.06), transparent 40%),
    linear-gradient(180deg, #010A13 0%, #04121F 100%);
  background-attachment: fixed;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--teal); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--gold-bright); }

h1, h2, h3, h4 {
  font-family: var(--font-title);
  font-weight: 700;
  color: var(--gold-bright);
  line-height: 1.25;
  margin: 0 0 .6em;
  letter-spacing: .5px;
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.3rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); }

p { margin: 0 0 1rem; }

ul, ol { margin: 0 0 1rem; padding-left: 1.4rem; }
li { margin-bottom: .4rem; }

section { position: relative; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

.section-pad { padding: 72px 0; }

/* Tiện ích */
.text-gold  { color: var(--gold); }
.text-teal  { color: var(--teal); }
.text-center{ text-align: center; }
.muted      { color: var(--text-soft); }
.mb-0 { margin-bottom: 0; }

/* Đường viền vàng ánh kim dùng lại nhiều nơi */
.gold-divider {
  height: 2px; border: 0;
  background: var(--grad-gold);
  margin: 0 auto;
  max-width: 240px;
  opacity: .8;
}

/* Nhãn tiêu đề mục có ký hiệu Hextech */
.eyebrow {
  display: inline-block;
  font-family: var(--font-title);
  font-size: .8rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: .5rem;
}

.section-head { text-align: center; margin-bottom: 48px; }
.section-head h2 { position: relative; display: inline-block; }
.section-head p { color: var(--text-soft); max-width: 620px; margin: 12px auto 0; }

/* ------------------------- 3. Nút bấm (Button) --------------------- */
.btn {
  --b: var(--gold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 14px 30px;
  border: 2px solid var(--gold-dark);
  background: linear-gradient(180deg, rgba(200,155,60,.08), rgba(200,155,60,.02));
  color: var(--gold-bright);
  cursor: pointer;
  position: relative;
  transition: all .25s ease;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}
.btn:hover {
  border-color: var(--gold);
  box-shadow: var(--shadow-gold);
  color: #fff;
  background: linear-gradient(180deg, rgba(200,155,60,.22), rgba(200,155,60,.06));
}
.btn-primary {
  background: linear-gradient(180deg, #C8AA6E, #C89B3C 60%, #785A28);
  color: #06131E;
  border-color: #F0E6D2;
}
.btn-primary:hover { color: #010A13; box-shadow: 0 0 26px rgba(200,155,60,.6); filter: brightness(1.08); }
.btn-teal {
  border-color: var(--teal-dark);
  color: var(--teal);
  background: linear-gradient(180deg, rgba(10,200,185,.1), rgba(10,200,185,.02));
}
.btn-teal:hover { border-color: var(--teal); box-shadow: var(--shadow-teal); color: #fff; }
.btn-lg { padding: 18px 40px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* ------------------------- 4. Header / Nav ------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(1, 10, 19, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-gold);
  box-shadow: 0 2px 20px rgba(0,0,0,.6);
}
.site-header .wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand__logo {
  width: 42px; height: 42px; flex-shrink: 0;
  filter: drop-shadow(0 0 6px rgba(200,155,60,.5));
}
.brand__name {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--gold-bright);
  letter-spacing: .5px;
  line-height: 1;
}
.brand__name b { color: var(--gold); }
.brand__tag { display: block; font-size: .62rem; letter-spacing: 2px; color: var(--teal); font-family: var(--font-body); text-transform: uppercase; }

.main-nav ul { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.main-nav a {
  font-family: var(--font-title);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .5px;
  text-transform: uppercase;
  color: var(--text);
  padding: 8px 12px;
  position: relative;
  white-space: nowrap;
}
.main-nav a::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 2px; height: 2px;
  background: var(--gold); transform: scaleX(0); transform-origin: left; transition: transform .25s ease;
}
.main-nav a:hover, .main-nav a.active { color: var(--gold-bright); }
.main-nav a:hover::after, .main-nav a.active::after { transform: scaleX(1); }

.nav-cta { display: flex; align-items: center; gap: 10px; }
.nav-cta .btn { padding: 9px 18px; font-size: .78rem; }

.nav-toggle {
  display: none;
  background: none; border: 1px solid var(--border-gold);
  color: var(--gold); width: 44px; height: 40px; cursor: pointer;
  border-radius: var(--radius);
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--gold); margin: 4px auto; transition: .3s; }

/* Dropdown "Trang khác" */
.has-dropdown { position: relative; }
.dropdown {
  position: absolute; top: 100%; right: 0; left: auto; min-width: 240px;
  background: var(--bg-1); border: 1px solid var(--border-gold);
  padding: 8px; list-style: none; margin: 6px 0 0;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: all .2s ease; box-shadow: 0 10px 30px rgba(0,0,0,.7);
}
.dropdown li { display: block; width: 100%; }
.has-dropdown:hover .dropdown,
.has-dropdown.open .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-toggle { cursor: pointer; }
/* Ép menu con xổ DỌC (đè .main-nav ul{display:flex}) — dùng đặc hiệu vừa đủ, không dính position ở mobile */
.main-nav ul.dropdown { display: block; }
.main-nav ul.dropdown li { display: block; width: 100%; }
.dropdown li { margin: 0; }
.dropdown a { display: block; padding: 10px 14px; }
.dropdown a::after { display: none; }
.dropdown a:hover { background: rgba(200,155,60,.1); }

/* ------------------------- 5. Hero -------------------------------- */
.hero {
  position: relative;
  padding: 90px 0 80px;
  background: var(--grad-hero);
  overflow: hidden;
  border-bottom: 1px solid var(--border-gold);
}
.hero::before { /* lưới hextech */
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(10,200,185,.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(10,200,185,.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 50% 40%, #000 20%, transparent 75%);
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 2; }
.hero-grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--border-gold);
  background: rgba(200,155,60,.08);
  padding: 6px 14px; border-radius: 30px;
  font-size: .78rem; letter-spacing: 1px; color: var(--gold); text-transform: uppercase;
  margin-bottom: 20px;
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 8px var(--teal); animation: pulse 1.8s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.35} }

.hero h1 { margin-bottom: 18px; }
.hero h1 span { color: var(--gold); text-shadow: 0 0 24px rgba(200,155,60,.4); }
.hero-lead { font-size: 1.12rem; color: var(--text-soft); max-width: 560px; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 34px; margin-top: 40px; flex-wrap: wrap; }
.hero-stats .num { font-family: var(--font-title); font-size: 2rem; color: var(--gold-bright); line-height: 1; }
.hero-stats .lbl { font-size: .8rem; color: var(--text-soft); text-transform: uppercase; letter-spacing: 1px; }

.hero-art {
  position: relative;
  aspect-ratio: 4/5;
  border: 2px solid var(--border-gold);
  background: var(--grad-panel);
  clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
  box-shadow: var(--shadow-gold);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.hero-art::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 30%, rgba(10,200,185,.2), transparent 60%);
}
.hero-art .hero-splash { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 20%; z-index: 0; }
.hero-art .glyph {
  font-family: var(--font-title); font-size: clamp(1.6rem,4vw,2.6rem); font-weight: 700;
  color: var(--gold-bright); text-align: center; z-index: 2; position: absolute; bottom: 22px; left: 0; right: 0;
  text-shadow: 0 2px 12px #000, 0 0 30px rgba(0,0,0,.9);
}
.hero-art .glyph span { color: var(--teal) !important; }

/* Particle canvas */
#particles { position: absolute; inset: 0; z-index: 1; pointer-events: none; }

/* ------------------------- 6. Card lưới skin ---------------------- */
.grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
}
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

.skin-card {
  position: relative;
  border: 1px solid var(--border-gold);
  background: var(--grad-panel);
  overflow: hidden;
  transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
  display: flex; flex-direction: column;
}
.skin-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold);
  box-shadow: var(--shadow-gold);
}
.skin-card__img {
  display: block;
  position: relative;
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, #0A2A32, #091428);
  overflow: hidden;
}
.skin-card__name a { color: inherit; }
.skin-card__name a:hover { color: var(--gold); }

/* Ảnh lớn trang chi tiết mod */
.mod-hero {
  border: 2px solid var(--border-gold);
  background: var(--grad-panel);
  overflow: hidden;
  aspect-ratio: 16/9;
  box-shadow: var(--shadow-gold);
  position: relative;
}
.mod-hero-img { width: 100%; height: 100%; object-fit: cover; object-position: top center; }
.skin-card__img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top center; transition: transform .5s ease; z-index: 2; }
.skin-card:hover .skin-card__img img { transform: scale(1.08); }
/* placeholder glyph khi chưa có ảnh thật */
.skin-card__img .ph {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-title); font-size: 1.4rem; color: var(--gold); text-align:center;
  background: repeating-linear-gradient(45deg, #0A1E28, #0A1E28 12px, #0C222C 12px, #0C222C 24px);
  padding: 10px;
}
.skin-card__body { padding: 14px 16px 18px; flex: 1; display: flex; flex-direction: column; }
.skin-card__champ { font-size: .72rem; letter-spacing: 1.5px; text-transform: uppercase; color: var(--teal); margin-bottom: 4px; }
.skin-card__name { font-family: var(--font-title); font-size: 1.08rem; color: var(--gold-bright); margin: 0 0 8px; }
.skin-card__meta { font-size: .82rem; color: var(--text-soft); margin-bottom: 14px; flex:1; }
.skin-card__foot { display: flex; gap: 8px; }
.skin-card__foot .btn { flex: 1; padding: 9px 10px; font-size: .72rem; }

.badge {
  position: absolute; top: 10px; left: 10px; z-index: 3;
  font-family: var(--font-title); font-size: .68rem; font-weight: 700;
  letter-spacing: 1px; padding: 4px 10px; text-transform: uppercase;
  border: 1px solid;
}
.badge--new { color: var(--new); border-color: var(--new); background: rgba(10,200,185,.15); box-shadow: 0 0 10px rgba(10,200,185,.4); }
.badge--hot { color: #FFB4A8; border-color: var(--hot); background: rgba(200,68,60,.2); box-shadow: 0 0 10px rgba(200,68,60,.4); }
.tier-tag {
  position:absolute; bottom:10px; right:10px; z-index:3;
  font-size:.66rem; letter-spacing:1px; padding:3px 8px; text-transform:uppercase;
  background: rgba(1,10,19,.8); border:1px solid var(--border-gold); color: var(--gold);
}

/* ------------------------- 7. Bộ lọc / tìm kiếm ------------------- */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
  padding: 18px; margin-bottom: 32px;
  border: 1px solid var(--border-gold);
  background: var(--grad-panel);
}
.search-box { position: relative; flex: 1; min-width: 220px; }
.search-box input {
  width: 100%; padding: 12px 14px 12px 42px;
  background: var(--bg-0); border: 1px solid var(--border);
  color: var(--text); font-family: var(--font-body); font-size: .95rem;
}
.search-box input:focus { outline: none; border-color: var(--gold); box-shadow: var(--shadow-gold); }
.search-box svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); }
.filter-group { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  font-family: var(--font-body); font-size: .8rem; letter-spacing: .5px;
  padding: 9px 16px; border: 1px solid var(--border); background: var(--bg-0);
  color: var(--text-soft); cursor: pointer; transition: all .2s ease; text-transform: uppercase;
}
.chip:hover { border-color: var(--gold-dark); color: var(--gold); }
.chip.active { background: linear-gradient(180deg,#C89B3C,#785A28); color: #06131E; border-color: var(--gold-bright); font-weight: 600; }
.result-count { color: var(--text-soft); font-size: .9rem; margin-bottom: 18px; }

/* ------------------------- 8. Panel / Card nội dung --------------- */
.panel {
  border: 1px solid var(--border-gold);
  background: var(--grad-panel);
  padding: 28px;
  position: relative;
}
.panel--corner::before, .panel--corner::after {
  content:""; position:absolute; width:14px; height:14px; border:2px solid var(--gold);
}
.panel--corner::before { top:-1px; left:-1px; border-right:0; border-bottom:0; }
.panel--corner::after { bottom:-1px; right:-1px; border-left:0; border-top:0; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px,1fr)); gap: 22px; }
.feature {
  border: 1px solid var(--border); background: var(--bg-1); padding: 26px 24px;
  transition: all .25s ease; text-align: center;
}
.feature:hover { border-color: var(--gold-dark); transform: translateY(-4px); }
.feature .ico {
  width: 58px; height: 58px; margin: 0 auto 16px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border-gold); background: rgba(200,155,60,.08);
  color: var(--gold); font-size: 1.5rem;
}
.feature h3 { font-size: 1.15rem; }
.feature p { color: var(--text-soft); font-size: .92rem; margin: 0; }

/* Bước hướng dẫn */
.steps { counter-reset: step; display: grid; gap: 22px; }
.step {
  display: grid; grid-template-columns: 64px 1fr; gap: 20px; align-items: start;
  border: 1px solid var(--border); background: var(--bg-1); padding: 22px 24px;
}
.step::before {
  counter-increment: step; content: counter(step,decimal-leading-zero);
  grid-column: 1; grid-row: 1 / span 2; align-self: start;
  font-family: var(--font-title); font-size: 1.6rem; color: var(--gold);
  width: 56px; height: 56px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border-gold); background: rgba(200,155,60,.06);
}
.step > * { grid-column: 2; }
.step h3 { margin-bottom: 6px; font-size: 1.15rem; }
.step p { margin: 0; color: var(--text-soft); }

/* ------------------------- 9. FAQ (accordion) -------------------- */
.faq-item { border: 1px solid var(--border); background: var(--bg-1); margin-bottom: 12px; }
.faq-q {
  width: 100%; text-align: left; background: none; border: 0; cursor: pointer;
  padding: 20px 24px; color: var(--gold-bright); font-family: var(--font-title);
  font-size: 1.05rem; display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-q .plus { color: var(--gold); font-size: 1.4rem; transition: transform .3s ease; flex-shrink: 0; }
.faq-item.open .faq-q .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a > div { padding: 0 24px 22px; color: var(--text-soft); }
.faq-item.open .faq-a { max-height: 600px; }

/* ------------------------- 10. Tin tức / Blog -------------------- */
.post-card {
  border: 1px solid var(--border-gold); background: var(--grad-panel);
  overflow: hidden; transition: all .28s ease; display: flex; flex-direction: column;
}
.post-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-gold); border-color: var(--gold); }
.post-card__img { aspect-ratio: 16/9; background: linear-gradient(135deg,#0A2A32,#091428); position: relative; overflow: hidden; }
.post-card__img .ph { position:absolute; inset:0; display:flex; align-items:center; justify-content:center; color:var(--gold); font-family:var(--font-title); text-align:center; padding:10px; background: repeating-linear-gradient(45deg,#0A1E28,#0A1E28 12px,#0C222C 12px,#0C222C 24px); }
.post-card__img img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; object-position:top center; z-index:2; transition: transform .5s ease; }
.post-card:hover .post-card__img img { transform: scale(1.06); }
/* Lớp phủ tối nhẹ để chữ badge/tier nổi trên ảnh */
.skin-card__img::after, .post-card__img::after { content:""; position:absolute; inset:0; z-index:2; pointer-events:none; background: linear-gradient(180deg, rgba(1,10,19,.15) 0%, transparent 30%, transparent 70%, rgba(1,10,19,.35) 100%); }
.post-card__body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.post-card__cat { font-size: .72rem; letter-spacing: 1.5px; text-transform: uppercase; color: var(--teal); margin-bottom: 8px; }
.post-card__title { font-size: 1.2rem; margin-bottom: 10px; }
.post-card__title a { color: var(--gold-bright); }
.post-card__title a:hover { color: var(--gold); }
.post-card__excerpt { color: var(--text-soft); font-size: .92rem; flex: 1; margin-bottom: 14px; }
.post-card__date { font-size: .8rem; color: var(--text-mute); }

/* Bài nổi bật: ảnh trái - nội dung phải trên desktop */
.featured-post { display: grid; grid-template-columns: 1.1fr 1fr; }
.featured-post .post-card__img { aspect-ratio: auto; height: 100%; min-height: 260px; }
.featured-post .post-card__body { padding: 30px 32px; justify-content: center; }
@media (max-width: 720px) { .featured-post { grid-template-columns: 1fr; } .featured-post .post-card__img { min-height: 200px; } }

/* Bài viết đơn */
.article { max-width: 820px; margin: 0 auto; }
.article h2 { margin-top: 2em; }
.article h3 { margin-top: 1.6em; }
.article img { border: 1px solid var(--border-gold); margin: 1.5em 0; }
.article blockquote {
  border-left: 3px solid var(--gold); margin: 1.5em 0; padding: 10px 22px;
  background: rgba(200,155,60,.05); color: var(--gold-bright); font-style: italic;
}

/* ------------------------- 11. Nội dung pháp lý ------------------- */
.legal { max-width: 860px; margin: 0 auto; }
.legal h2 { margin-top: 2em; font-size: 1.5rem; }
.legal h3 { margin-top: 1.5em; font-size: 1.2rem; color: var(--gold); }
.legal ul { color: var(--text-soft); }
.legal .toc {
  border: 1px solid var(--border-gold); background: var(--bg-1); padding: 22px 26px; margin-bottom: 40px;
}
.legal .toc ul { list-style: none; padding: 0; columns: 2; }
.legal .updated { color: var(--text-mute); font-size: .9rem; margin-bottom: 30px; }

/* Alert box (cảnh báo an toàn) */
.alert {
  border-left: 4px solid var(--gold); background: rgba(200,155,60,.07);
  padding: 18px 22px; margin: 24px 0; display: flex; gap: 14px; align-items: flex-start;
}
.alert .ico { font-size: 1.4rem; color: var(--gold); flex-shrink: 0; }
.alert h4 { margin: 0 0 4px; color: var(--gold-bright); font-family: var(--font-title); }
.alert p { margin: 0; color: var(--text-soft); font-size: .92rem; }
.alert--danger { border-color: var(--danger); background: rgba(232,64,87,.08); }
.alert--danger .ico, .alert--danger h4 { color: #FF8A98; }
.alert--info { border-color: var(--teal); background: rgba(10,200,185,.07); }
.alert--info .ico, .alert--info h4 { color: var(--teal); }

/* ------------------------- 12. Download page --------------------- */
.dl-hero {
  border: 2px solid var(--border-gold); background: var(--grad-panel);
  padding: 44px; text-align: center; box-shadow: var(--shadow-gold); position: relative;
  clip-path: polygon(24px 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%, 0 24px);
}
.dl-version { display: inline-flex; gap: 20px; flex-wrap: wrap; justify-content: center; margin: 20px 0 8px; color: var(--text-soft); font-size: .9rem; }
.dl-version b { color: var(--gold-bright); }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table th, .spec-table td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.spec-table th { color: var(--gold); font-family: var(--font-title); font-weight: 600; width: 40%; }
.spec-table td { color: var(--text-soft); }

/* ------------------------- 13. Contact form --------------------- */
.contact-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 36px; }
.form-field { margin-bottom: 18px; }
.form-field label { display: block; margin-bottom: 6px; color: var(--gold); font-size: .88rem; font-family: var(--font-title); letter-spacing: .5px; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 12px 14px; background: var(--bg-0);
  border: 1px solid var(--border); color: var(--text); font-family: var(--font-body); font-size: .95rem;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { outline: none; border-color: var(--gold); box-shadow: var(--shadow-gold); }
.form-field textarea { resize: vertical; min-height: 130px; }
.contact-info { display: grid; gap: 14px; }
.contact-info a.card-link {
  display: flex; gap: 14px; align-items: center; padding: 16px 18px;
  border: 1px solid var(--border-gold); background: var(--bg-1); transition: all .25s ease;
}
.contact-info a.card-link:hover { border-color: var(--gold); background: rgba(200,155,60,.08); transform: translateX(4px); }
.contact-info .ci-ico { width: 44px; height: 44px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: rgba(10,200,185,.1); border: 1px solid var(--border-gold); font-size: 1.2rem; }
.contact-info .ci-label { font-size: .78rem; color: var(--text-soft); text-transform: uppercase; letter-spacing: 1px; }
.contact-info .ci-value { color: var(--gold-bright); font-family: var(--font-title); }
.form-note { font-size: .82rem; color: var(--text-mute); margin-top: 12px; }
.form-success { display:none; padding:16px 20px; border:1px solid var(--success); background: rgba(10,207,131,.1); color: var(--success); margin-bottom:18px; }

/* ------------------------- 14. Page hero (nội trang) ------------- */
.page-hero {
  padding: 60px 0 46px; text-align: center;
  background: var(--grad-hero); border-bottom: 1px solid var(--border-gold); position: relative;
}
.page-hero h1 { margin-bottom: 12px; }
.page-hero p { color: var(--text-soft); max-width: 640px; margin: 0 auto; }
.breadcrumb { font-size: .82rem; color: var(--text-mute); margin-bottom: 16px; }
.breadcrumb a { color: var(--text-soft); }
.breadcrumb span { color: var(--gold); }

/* ------------------------- 15. CTA band -------------------------- */
.cta-band {
  border: 2px solid var(--border-gold); background: var(--grad-hero);
  padding: 50px 40px; text-align: center; position: relative; overflow: hidden;
  clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}
.cta-band h2 { margin-bottom: 14px; }
.cta-band p { color: var(--text-soft); max-width: 560px; margin: 0 auto 26px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ------------------------- 16. Footer ---------------------------- */
.site-footer {
  border-top: 2px solid var(--border-gold);
  background: linear-gradient(180deg, #04121F, #010A13);
  padding: 56px 0 0; margin-top: 40px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 40px;
}
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand p { color: var(--text-soft); font-size: .9rem; max-width: 340px; }
.footer-social { display: flex; gap: 10px; margin-top: 18px; }
.footer-social a {
  width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border-gold); color: var(--gold); border-radius: 50%; transition: all .25s ease;
}
.footer-social a:hover { background: var(--gold); color: #010A13; box-shadow: var(--shadow-gold); }
.footer-col h4 { font-size: .95rem; color: var(--gold); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 16px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--text-soft); font-size: .9rem; }
.footer-col a:hover { color: var(--gold-bright); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border); padding: 20px 0; text-align: center;
  color: var(--text-mute); font-size: .84rem;
}
.footer-bottom .kw { color: var(--text-soft); }

/* ------------------------- 17. Floating CTA + Cookie ------------- */
.float-cta {
  position: fixed; right: 20px; bottom: 20px; z-index: 90;
  display: flex; flex-direction: column; gap: 12px; align-items: flex-end;
}
.float-btn {
  display: flex; align-items: center; gap: 10px; padding: 12px 18px;
  border-radius: 40px; font-family: var(--font-title); font-weight: 700; font-size: .85rem;
  border: 2px solid; box-shadow: 0 6px 20px rgba(0,0,0,.5); transition: all .25s ease;
  text-transform: uppercase; letter-spacing: .5px;
}
.float-btn:hover { transform: translateY(-3px) scale(1.03); }
.float-btn--dl { background: linear-gradient(180deg,#C8AA6E,#785A28); color: #06131E; border-color: #F0E6D2; }
.float-btn--dl:hover { box-shadow: 0 0 26px rgba(200,155,60,.7); color:#010A13; }
.float-btn--fb { background: #1877F2; color: #fff; border-color: #4a94ff; }
.float-btn--fb:hover { box-shadow: 0 0 22px rgba(24,119,242,.7); color:#fff; }
.float-icon { font-size: 1.1rem; }

.cookie-banner {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 200;
  background: rgba(1,10,19,.97); border-top: 2px solid var(--border-gold);
  padding: 18px 20px; transform: translateY(120%); transition: transform .4s ease;
  backdrop-filter: blur(6px);
}
.cookie-banner.show { transform: translateY(0); }
.cookie-inner { max-width: var(--wrap); margin: 0 auto; display: flex; align-items: center; gap: 24px; flex-wrap: wrap; justify-content: space-between; }
.cookie-inner p { margin: 0; font-size: .9rem; color: var(--text-soft); flex: 1; min-width: 260px; }
.cookie-inner p b { color: var(--gold); }
.cookie-actions { display: flex; gap: 10px; }
.cookie-actions .btn { padding: 10px 20px; font-size: .78rem; }

/* ------------------------- 18. Animations ------------------------ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* Lazy image fade */
img.lazy { opacity: 0; transition: opacity .5s ease; }
img.lazy.loaded { opacity: 1; }

/* ------------------------- 19. Responsive ------------------------ */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { max-width: 380px; margin: 10px auto 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .main-nav {
    position: fixed; top: var(--header-h); right: 0; width: min(320px, 85vw);
    height: calc(100vh - var(--header-h)); background: var(--bg-1);
    border-left: 1px solid var(--border-gold); padding: 20px;
    transform: translateX(110%); transition: transform .3s ease; overflow-y: auto;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav ul { flex-direction: column; align-items: stretch; gap: 2px; }
  .main-nav a { padding: 14px 12px; border-bottom: 1px solid var(--border); }
  .main-nav a::after { display: none; }
  .has-dropdown .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; padding-left: 16px; margin: 0; }
  .nav-toggle { display: block; }
  .nav-cta .btn-download-nav { display: none; }
}
@media (max-width: 640px) {
  .section-pad { padding: 52px 0; }
  .hero { padding: 60px 0 56px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .dl-hero { padding: 30px 22px; }
  .cta-band { padding: 36px 22px; }
  .legal .toc ul { columns: 1; }
  .hero-stats { gap: 24px; }
  .float-btn span.txt { display: none; }
  .float-btn { padding: 14px; border-radius: 50%; }
}

/* Giảm chuyển động cho người dùng cần */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}