/* ============================================================
   INAFESA — Shared stylesheet (Á Đông Hoàng Kim)
   Used by all pages in /site/. Per-page styles inline in <style>.
   ============================================================ */

:root{
  --bg:#F8F2E4; --bg-2:#F1E8D2; --bg-3:#FCF6E6; --paper:#FDFAF0;
  --dark:#120A07; --dark-2:#1F140E; --dark-3:#2E1F16;
  --lacquer:#5C0E0E; --lacquer-2:#7A1A1A; --lacquer-3:#3D0808;
  --gold:#9C7E2A; --gold-2:#7E6420;
  --gold-bright:#D4AF37; --gold-bright-2:#E8C76B;
  --ink:#1F1410; --ink-2:#3D2A1E; --body:#46352B; --mut:#8B7560;
  --cream:#F5E8C4; --cream-2:#E0D2A8; --mut-dark:#9C8A6E;
  --line:#D6CDB5; --line-dark:#3A2620;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:'Be Vietnam Pro',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--body);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg{max-width:100%;display:block}
a{color:var(--lacquer);text-decoration:none;transition:color .15s}
.mono{font-family:'JetBrains Mono',ui-monospace,Menlo,monospace;letter-spacing:.02em}
.serif{font-family:'Noto Serif',Georgia,serif}
.wrap{max-width:1240px;margin:0 auto;padding:0 32px}
.narrow{max-width:880px;margin:0 auto;padding:0 32px}

/* ============ FLOATING CONTACT ============ */
.floating-actions{position:fixed;right:20px;bottom:20px;z-index:60;display:flex;flex-direction:column;gap:12px;align-items:flex-end}
.floating-btn{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;text-decoration:none;box-shadow:0 8px 24px rgba(31,20,16,.25);transition:all .25s;position:relative;color:#fff;border:none;cursor:pointer}
.floating-btn:hover{transform:translateY(-3px);box-shadow:0 14px 32px rgba(31,20,16,.35)}
.floating-btn svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.floating-btn.phone{background:var(--lacquer)}
.floating-btn.phone:hover{background:var(--lacquer-2)}
.floating-btn.zalo{background:#0068ff}
.floating-btn.zalo:hover{background:#005ce0}
.floating-btn.zalo .label{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:13px;color:#fff;letter-spacing:-.01em}
.floating-btn .pulse{position:absolute;inset:-4px;border-radius:50%;border:2px solid var(--lacquer);animation:pulseRing 2s ease-out infinite;opacity:0;pointer-events:none}
.floating-btn.zalo .pulse{border-color:#0068ff}
@keyframes pulseRing{0%{transform:scale(.95);opacity:.7}80%,100%{transform:scale(1.4);opacity:0}}
.floating-btn .tooltip{position:absolute;right:calc(100% + 12px);top:50%;transform:translateY(-50%);background:var(--ink);color:var(--cream);font-family:'Be Vietnam Pro',sans-serif;font-size:12.5px;padding:8px 14px;border-radius:6px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .2s;letter-spacing:.01em;font-weight:500}
.floating-btn .tooltip::after{content:"";position:absolute;left:100%;top:50%;transform:translateY(-50%);border:6px solid transparent;border-left-color:var(--ink)}
.floating-btn:hover .tooltip{opacity:1}
.floating-btn.back-top{background:var(--bg-3);color:var(--lacquer);border:1px solid var(--line);box-shadow:0 6px 18px rgba(31,20,16,.15);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .3s,transform .3s,visibility .3s,box-shadow .3s,background .25s}
.floating-btn.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.floating-btn.back-top:hover{background:var(--bg);transform:translateY(-3px)}
@media (max-width:540px){.floating-actions{right:14px;bottom:14px;gap:10px}.floating-btn{width:48px;height:48px}.floating-btn svg{width:20px;height:20px}.floating-btn .tooltip{display:none}}

/* ============ MOBILE MENU OVERLAY ============ */
.mobile-toggle{display:none;width:42px;height:42px;background:transparent;border:1px solid var(--line);border-radius:6px;cursor:pointer;align-items:center;justify-content:center;color:var(--ink);transition:all .2s;padding:0}
.mobile-toggle:hover{background:var(--bg-3);border-color:var(--lacquer)}
.mobile-toggle svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
.mobile-menu{position:fixed;inset:0;background:rgba(18,10,7,.96);backdrop-filter:blur(18px);z-index:200;display:flex;flex-direction:column;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s}
.mobile-menu.open{opacity:1;visibility:visible}
.mobile-menu .close{position:absolute;top:20px;right:20px;width:44px;height:44px;background:transparent;border:1px solid var(--gold-bright);border-radius:6px;color:var(--gold-bright);cursor:pointer;display:grid;place-items:center;transition:all .2s}
.mobile-menu .close:hover{background:var(--lacquer);border-color:var(--lacquer)}
.mobile-menu .close svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
.mobile-menu ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;text-align:center}
.mobile-menu ul li{border-bottom:1px solid rgba(212,175,55,.18)}
.mobile-menu ul li:last-child{border-bottom:none}
.mobile-menu ul a{display:block;padding:14px 60px;font-family:'Noto Serif',serif;font-size:18px;color:var(--cream);font-weight:500;letter-spacing:.04em;transition:color .2s,background .2s;text-decoration:none}
.mobile-menu ul a:hover{color:var(--gold-bright);background:rgba(212,175,55,.05)}
.mobile-menu .mm-scroll{max-height:100vh;overflow-y:auto;width:100%;padding:24px 0}
.mobile-menu details{border-bottom:1px solid rgba(212,175,55,.15);width:100%;max-width:480px;margin:0 auto}
.mobile-menu details:last-child{border-bottom:none}
.mobile-menu summary{list-style:none;cursor:pointer;padding:14px 22px;font-family:'Noto Serif',serif;font-size:18px;color:var(--cream);font-weight:500;letter-spacing:.04em;display:flex;justify-content:space-between;align-items:center}
.mobile-menu summary::-webkit-details-marker{display:none}
.mobile-menu summary::after{content:"+";color:var(--gold-bright);font-family:'Noto Serif',serif;font-size:22px;transition:transform .2s}
.mobile-menu details[open] summary::after{content:"−"}
.mobile-menu details a{padding:8px 22px 8px 40px;font-size:14.5px;color:var(--cream-2);font-family:'Be Vietnam Pro',sans-serif;font-weight:500;letter-spacing:.02em}
.mobile-menu details a .code{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--gold-bright);margin-right:8px}
.mobile-menu details h6{font-family:'Noto Serif',serif;font-style:italic;color:var(--gold-bright);font-size:12px;letter-spacing:.2em;text-transform:uppercase;padding:10px 22px 4px 30px;margin:6px 0 0;font-weight:500}
@media (max-width:880px){.mobile-toggle{display:inline-flex}}

/* ============ TOP UTIL STRIP ============ */
.top-util{background:var(--dark);color:var(--cream);font-size:13.5px;border-bottom:1px solid var(--line-dark);letter-spacing:.03em;font-weight:500}
.top-util .wrap{display:flex;justify-content:space-between;padding:10px 32px;flex-wrap:wrap;gap:8px}
.top-util .left{display:flex;align-items:center;gap:14px}
.top-util .left::before{content:"●";color:var(--gold-bright);font-size:10px}
.top-util .right{display:flex;gap:20px}
.top-util a{color:var(--cream-2);transition:color .15s;text-decoration:none}
.top-util a:hover{color:var(--gold-bright)}

/* ============ MAIN NAVBAR + MEGA MENU ============ */
nav.top{background:var(--bg);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30;backdrop-filter:blur(10px);box-shadow:0 1px 0 rgba(31,20,16,.04)}
nav.top .wrap{display:flex;justify-content:space-between;align-items:center;padding:14px 32px;gap:24px;max-width:1320px;margin:0 auto}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none;flex-shrink:0}
.brand .seal{width:48px;height:48px;background:var(--lacquer);position:relative;display:grid;place-items:center;color:var(--gold-bright);font-family:'Noto Serif',serif;font-size:24px;font-weight:600;border:1px solid var(--gold-bright);flex-shrink:0;padding:5px}
.brand .seal::after{content:"";position:absolute;inset:3px;border:1px solid var(--gold-bright);opacity:.5;pointer-events:none}
.brand .seal img{width:100%;height:100%;object-fit:contain;display:block;position:relative;z-index:1}
.brand-text{font-family:'Noto Serif',serif;line-height:1.1}
.brand-text strong{display:block;color:var(--ink);font-size:20px;font-weight:600;letter-spacing:.04em}
.brand-text small{font-size:9.5px;color:var(--mut);letter-spacing:.3em;text-transform:uppercase;font-family:'Be Vietnam Pro',sans-serif;font-weight:500}

/* Top-level nav menu */
.nav-main{display:flex;gap:0;list-style:none;padding:0;margin:0;flex:1;justify-content:center;align-items:stretch}
.nav-main > li{position:relative}
.nav-main > li > a{display:flex;align-items:center;gap:6px;padding:18px 18px;color:var(--ink);font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;position:relative;transition:color .15s;text-decoration:none;cursor:pointer;font-family:'Be Vietnam Pro',sans-serif}
.nav-main > li > a:hover,.nav-main > li.active > a,.nav-main > li:hover > a{color:var(--lacquer)}
.nav-main > li.active > a::after,.nav-main > li:hover > a::after{content:"";position:absolute;left:18px;right:18px;bottom:6px;height:1px;background:var(--lacquer)}
.nav-main .caret{display:inline-block;width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;opacity:.6;transition:transform .2s}
.nav-main > li:hover .caret{transform:rotate(180deg);opacity:1}

/* Standard dropdown (single column) */
.submenu{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);background:var(--paper);border:1px solid var(--gold);box-shadow:0 18px 42px rgba(31,20,16,.15);min-width:240px;padding:14px 0;opacity:0;visibility:hidden;transition:opacity .25s,transform .25s,visibility .25s;z-index:40}
.submenu::before{content:"";position:absolute;inset:4px;border:1px dashed var(--gold);opacity:.3;pointer-events:none}
.nav-main > li:hover .submenu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.submenu a{display:flex;align-items:baseline;justify-content:space-between;gap:14px;padding:9px 22px;color:var(--ink);font-family:'Noto Serif',serif;font-size:14px;font-weight:500;text-decoration:none;transition:all .15s;position:relative;letter-spacing:.02em}
.submenu a:hover{background:rgba(92,14,14,.06);color:var(--lacquer);padding-left:28px}
.submenu a .code{font-family:'JetBrains Mono',monospace;font-size:10.5px;color:var(--gold);font-weight:600;letter-spacing:.04em;text-transform:uppercase}
.submenu a:hover .code{color:var(--lacquer)}

/* Mega panel (multi-column for Chương trình) */
.mega-panel{left:50%;transform:translateX(-50%) translateY(8px);min-width:auto;width:1080px;max-width:calc(100vw - 40px);padding:28px 32px;display:grid;grid-template-columns:repeat(6,1fr);gap:24px}
.nav-main > li:hover .mega-panel{transform:translateX(-50%) translateY(0)}
.mega-col{position:relative;z-index:2}
.mega-col h5{font-family:'Noto Serif',serif;font-style:italic;color:var(--lacquer);font-size:13px;letter-spacing:.18em;text-transform:uppercase;font-weight:600;margin:0 0 12px;padding-bottom:8px;border-bottom:1px solid var(--gold);display:flex;align-items:baseline;gap:8px}
.mega-col h5 .pill{font-family:'JetBrains Mono',monospace;font-size:9.5px;color:var(--gold-bright);background:var(--lacquer);padding:2px 6px;border-radius:3px;font-weight:700;letter-spacing:.04em;text-transform:none}
.mega-col a{display:flex;align-items:baseline;gap:8px;padding:6px 0;color:var(--ink);font-family:'Be Vietnam Pro',sans-serif;font-size:12.5px;font-weight:500;text-decoration:none;transition:all .15s;letter-spacing:.01em;border-bottom:1px dashed transparent}
.mega-col a:hover{color:var(--lacquer);padding-left:6px;border-bottom-color:var(--line)}
.mega-col a .code{font-family:'JetBrains Mono',monospace;font-size:9.5px;color:var(--gold);font-weight:700;letter-spacing:.02em;flex-shrink:0}
.mega-col a:hover .code{color:var(--lacquer)}
.mega-col .all{margin-top:8px;padding:6px 0;font-family:'Noto Serif',serif;font-style:italic;color:var(--gold);font-size:11.5px;letter-spacing:.04em;border-top:1px dashed var(--line)}
.mega-col .all:hover{color:var(--lacquer)}

nav.top .cta{background:linear-gradient(135deg,var(--lacquer) 0%,var(--lacquer-2) 100%);color:var(--gold-bright);padding:11px 22px;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;border:1px solid var(--lacquer);transition:all .25s;white-space:nowrap;text-decoration:none;flex-shrink:0}
nav.top .cta:hover{background:var(--lacquer-2);border-color:var(--gold-bright)}

@media (max-width:1100px){.nav-main > li > a{padding:18px 12px;font-size:12px}.mega-panel{width:calc(100vw - 40px);grid-template-columns:repeat(3,1fr)}}
@media (max-width:880px){.nav-main{display:none}nav.top .wrap{padding:12px 20px}nav.top .cta{display:none}.brand-text strong{font-size:18px}}

/* ============ BREADCRUMB ============ */
.breadcrumb{background:var(--bg-2);border-bottom:1px solid var(--line);padding:14px 32px;font-family:'Be Vietnam Pro',sans-serif;font-size:12.5px;color:var(--mut);letter-spacing:.04em}
.breadcrumb .wrap{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:0 0}
.breadcrumb a{color:var(--lacquer);text-decoration:none;font-weight:500;transition:color .2s}
.breadcrumb a:hover{color:var(--lacquer-2);text-decoration:underline}
.breadcrumb .sep{color:var(--gold);font-family:'Noto Serif',serif;font-style:italic;font-size:14px}
.breadcrumb .current{color:var(--ink);font-weight:600}

/* ============ PAGE HERO (sub-page header, light) ============ */
.page-hero{position:relative;background:linear-gradient(180deg,var(--bg-3) 0%,var(--bg) 100%);padding:72px 0 56px;border-bottom:1px solid var(--line);overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 90% 10%,rgba(156,126,42,.08) 0%,transparent 50%);pointer-events:none}
.page-hero .wrap{position:relative;z-index:2;text-align:center}
.page-hero .kicker{display:inline-flex;align-items:center;gap:12px;color:var(--lacquer);font-family:'Be Vietnam Pro',sans-serif;font-size:12px;letter-spacing:.28em;text-transform:uppercase;font-weight:700;margin-bottom:16px}
.page-hero .kicker::before,.page-hero .kicker::after{content:"";display:block;width:32px;height:1px;background:var(--lacquer)}
.page-hero h1{font-family:'Noto Serif',serif;font-size:clamp(36px,5vw,54px);color:var(--ink);margin:0 0 16px;font-weight:600;line-height:1.1;letter-spacing:-.005em}
.page-hero h1 em{font-style:italic;color:var(--lacquer);font-weight:500}
.page-hero .lede{font-family:'Be Vietnam Pro',sans-serif;color:var(--ink-2);font-size:17px;max-width:720px;margin:0 auto;line-height:1.75;font-weight:400}

/* ============ SECTION BASE ============ */
section.s{padding:88px 0;position:relative;background:var(--bg)}
section.s.alt{background:var(--bg-3)}
section.s.dark{background:linear-gradient(180deg,var(--dark) 0%,var(--dark-2) 100%);color:var(--cream)}
section.s.dark .s-h{color:var(--cream)}
section.s.dark .s-h em{color:var(--gold-bright)}
section.s.dark .s-eyebrow{color:var(--gold-bright)}
section.s.dark .s-eyebrow::before,section.s.dark .s-eyebrow::after{background:var(--gold-bright)}
section.s.dark .s-sub{color:var(--cream-2)}
.s-head{text-align:center;margin-bottom:56px}
.s-eyebrow{display:inline-flex;align-items:center;gap:12px;color:var(--lacquer);font-family:'Be Vietnam Pro',sans-serif;font-size:12px;letter-spacing:.28em;text-transform:uppercase;font-weight:700;margin-bottom:16px}
.s-eyebrow::before,.s-eyebrow::after{content:"";display:block;width:32px;height:1px;background:var(--lacquer)}
.s-h{font-family:'Noto Serif',serif;font-weight:600;font-size:clamp(32px,4.5vw,46px);line-height:1.15;margin:0;color:var(--ink);letter-spacing:-.005em}
.s-h em{font-style:italic;color:var(--lacquer);font-weight:500}
.s-sub{font-family:'Be Vietnam Pro',sans-serif;color:var(--ink-2);font-size:16px;margin:16px auto 0;max-width:720px;line-height:1.75;font-weight:400}

/* ============ BUTTONS ============ */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 30px;font-family:'Be Vietnam Pro',sans-serif;font-size:13px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;border:1px solid transparent;cursor:pointer;transition:all .25s;text-decoration:none}
.btn-gold{background:var(--gold-bright);color:var(--lacquer-3);border-color:var(--gold-bright)}
.btn-gold:hover{background:transparent;color:var(--lacquer)}
.btn-lacquer{background:linear-gradient(135deg,var(--lacquer) 0%,var(--lacquer-2) 100%);color:var(--gold-bright);border-color:var(--lacquer);box-shadow:0 8px 22px rgba(92,14,14,.25)}
.btn-lacquer:hover{background:var(--lacquer-2);transform:translateY(-2px);box-shadow:0 14px 32px rgba(92,14,14,.35)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--lacquer);color:var(--lacquer)}

/* ============ COMMON CARDS ============ */
.card{position:relative;background:var(--paper);border:1px solid var(--line);padding:28px 26px;transition:all .3s}
.card:hover{border-color:var(--lacquer);transform:translateY(-3px);box-shadow:0 12px 28px rgba(92,14,14,.12)}
.card.dark{background:linear-gradient(135deg,var(--dark-2) 0%,var(--dark) 100%);border-color:var(--gold-bright);color:var(--cream)}
.card.frame::before{content:"";position:absolute;inset:5px;border:1px solid var(--gold);opacity:.3;pointer-events:none}
.card.dark.frame::before{border-color:var(--gold-bright);opacity:.4}

/* ============ FOOTER ============ */
footer.site{background:var(--dark);padding:56px 0 28px;color:var(--mut-dark);font-size:13px;border-top:1px solid rgba(212,175,55,.4)}
footer.site .grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:32px}
footer.site h6{font-family:'Noto Serif',serif;font-style:italic;color:var(--gold-bright);font-size:14px;letter-spacing:.2em;text-transform:uppercase;margin:0 0 14px;font-weight:500}
footer.site ul{list-style:none;padding:0;margin:0}
footer.site ul li{padding:5px 0}
footer.site a{color:var(--cream-2);transition:color .15s;text-decoration:none}
footer.site a:hover{color:var(--gold-bright)}
footer.site .bottom{padding-top:24px;border-top:1px solid var(--line-dark);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-family:'Noto Serif',serif;font-style:italic;font-size:12.5px}
footer.site .brand{margin-bottom:14px;text-decoration:none}
footer.site .brand-text strong{color:var(--cream)}
footer.site .brand-text small{color:var(--cream-2)}
footer.site .about{margin:0;color:var(--mut);font-family:'Noto Serif',serif;font-style:italic;font-size:14px;line-height:1.7;max-width:340px}
@media (max-width:780px){footer.site .grid{grid-template-columns:1fr 1fr}}

/* ============ REVEAL ON SCROLL ============ */
@media (prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.16,.84,.44,1),transform .8s cubic-bezier(.16,.84,.44,1);will-change:opacity,transform}
  .reveal.is-visible{opacity:1;transform:translateY(0)}
}