/* ═══════════════════════════════════════════
   SỬ KÝ — Landing Page Styles
   Three.js Hero + Glassmorphism + Scroll FX
   ═══════════════════════════════════════════ */

/* ── Base ── */
.landing{font-family:var(--sans);color:var(--ch);overflow-x:hidden}

/* ── Hero Section ── */
.land-hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;background:linear-gradient(135deg,#1a1a2e 0%,#16213e 40%,#0f3460 70%,#1a1a2e 100%);color:var(--white);overflow:hidden}
.land-hero-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:1;pointer-events:all}
.land-hero-content{position:relative;z-index:2;padding:32px 24px;max-width:700px}
.land-hero-badge{display:inline-block;padding:6px 16px;border:1px solid rgba(217,169,56,.35);border-radius:20px;font-size:13px;color:var(--gold);letter-spacing:.04em;margin-bottom:24px;backdrop-filter:blur(8px);background:rgba(217,169,56,.08)}
.land-hero-title{font-family:'Playfair Display',var(--serif);font-size:clamp(56px,12vw,96px);font-weight:800;letter-spacing:.06em;margin-bottom:8px;background:linear-gradient(135deg,#fff 30%,#D9A938 70%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.1}
.land-hero-tagline{font-family:'Playfair Display',var(--serif);font-size:clamp(18px,4vw,28px);font-weight:600;color:rgba(255,255,255,.85);margin-bottom:20px;letter-spacing:.03em}
.land-hero-sub{font-size:15px;line-height:1.8;color:rgba(255,255,255,.55);margin-bottom:32px;max-width:540px;margin-left:auto;margin-right:auto}
.land-hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.land-btn-gv{background:var(--red)!important;border-color:var(--red)!important;min-width:180px;font-size:15px!important;padding:14px 28px!important}
.land-btn-gv:hover{background:#a42727!important;transform:translateY(-2px);box-shadow:0 8px 32px rgba(197,48,48,.35)}
.land-btn-hs{color:var(--gold)!important;border-color:var(--gold)!important;min-width:180px;font-size:15px!important;padding:14px 28px!important}
.land-btn-hs:hover{background:rgba(217,169,56,.12)!important;transform:translateY(-2px)}

/* Scroll indicator */
.land-hero-scroll{position:absolute;bottom:32px;left:50%;transform:translateX(-50%);z-index:2}
.land-scroll-indicator{width:24px;height:40px;border:2px solid rgba(255,255,255,.25);border-radius:12px;position:relative}
.land-scroll-indicator::after{content:'';position:absolute;top:6px;left:50%;transform:translateX(-50%);width:4px;height:8px;background:var(--gold);border-radius:2px;animation:scroll-bounce 2s ease infinite}
@keyframes scroll-bounce{0%,100%{transform:translateX(-50%) translateY(0);opacity:1}50%{transform:translateX(-50%) translateY(12px);opacity:.3}}

/* ── Sections ── */
.land-section{padding:80px 24px}
.land-container{max-width:1100px;margin:0 auto}
.land-section-title{font-family:'Playfair Display',var(--serif);font-size:clamp(28px,5vw,40px);font-weight:700;margin-bottom:12px;color:var(--ch)}
.land-section-sub{font-size:15px;color:var(--ch50);max-width:600px;margin:0 auto;line-height:1.7}

/* ── Mode Cards ── */
.land-modes-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;max-width:700px;margin:0 auto}
.land-mode-card{background:var(--white);border:1px solid var(--ch10);border-radius:16px;padding:32px 24px;text-align:center;transition:all .3s var(--ease);position:relative;overflow:hidden}
.land-mode-card::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(197,48,48,.03),rgba(217,169,56,.05));opacity:0;transition:opacity .3s}
.land-mode-card:hover{transform:translateY(-6px);box-shadow:0 16px 48px rgba(0,0,0,.08);border-color:var(--gold)}
.land-mode-card:hover::before{opacity:1}
.land-mode-icon{font-size:36px;color:var(--red);margin-bottom:16px;position:relative;z-index:1}
.land-mode-card h3{font-size:18px;font-weight:700;margin-bottom:8px;position:relative;z-index:1}
.land-mode-card p{font-size:13px;color:var(--ch50);line-height:1.6;position:relative;z-index:1}

/* ── Steps ── */
.land-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:32px}
.land-step{text-align:center;padding:32px 24px}
.land-step-num{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--red),#a42727);color:var(--white);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:20px;margin:0 auto 16px;box-shadow:0 4px 16px rgba(197,48,48,.25)}
.land-step h3{font-size:16px;font-weight:700;margin-bottom:8px}
.land-step p{font-size:14px;color:var(--ch50);line-height:1.6}

/* ── Stats Section ── */
.land-stats-section{background:linear-gradient(135deg,#1a1a2e,#0f3460);color:var(--white);text-align:center}
.land-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.land-stat{padding:24px}
.land-stat-num{font-family:'Playfair Display',var(--serif);font-size:clamp(36px,6vw,52px);font-weight:800;color:var(--gold);margin-bottom:8px}
.land-stat-label{font-size:14px;color:rgba(255,255,255,.6);text-transform:uppercase;letter-spacing:.05em}

/* ── Footer ── */
.land-footer{padding:32px 24px;background:var(--cream);border-top:1px solid var(--ch10)}

/* ── Scroll Reveal Animation ── */
.scroll-reveal{opacity:0;transform:translateY(24px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.scroll-reveal.visible{opacity:1;transform:translateY(0)}

/* ── Responsive ── */
@media(max-width:768px){
  .land-stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .land-hero-cta{flex-direction:column;align-items:center}
  .land-btn-gv,.land-btn-hs{width:100%;max-width:280px}
  .land-section{padding:60px 20px}
}
@media(max-width:480px){
  .land-stats-grid{grid-template-columns:repeat(2,1fr)}
  .land-hero{min-height:90vh}
  .land-modes-grid{grid-template-columns:1fr;max-width:100%}
  .land-steps{grid-template-columns:1fr}
  .land-section{padding:48px 16px}
  .land-hero-sub{font-size:13px}
  .land-hero-badge{font-size:11px}
}