/* ==========================================================================
   SHI-IP Tam Dương — SHELL DÙNG CHUNG (header, footer/CTA, thẻ ribbon, nút,
   hero banner trang con, tokens, responsive). Dùng cho mọi trang con.
   ⚠️ index.html hiện tự chứa bản CSS tương đương (chưa gộp) — nếu sửa shell,
      nhớ đồng bộ cả 2 nơi (xem readme/CLAUDE.md).
   ========================================================================== */

/* ============ FONTS ============ */
@font-face{
  font-family:'Lunea Sans';
  src:url('fonts/1FTV-VIP-LUNEA-SANS.OTF') format('opentype');
  font-weight:400; font-style:normal; font-display:swap;
}

/* ============ TOKENS ============ */
:root{
  --ink:#1a1814;
  --white:#fff;
  --surface:#f7f5f2;
  --gold:#eec870;
  --gold-soft:#f3d88c;
  --gold-deep:#c29733;
  --gold-link:#b48432;
  --line:#e5e5e5;
  --line-soft:#e7e2d9;

  --font-head:'Lunea Sans','Inter',system-ui,sans-serif;
  --font-body:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;

  --maxw:1440px;
  --pad:80px;

  --grad-gold:
    linear-gradient(270deg,rgba(242,194,111,.7) 0%,rgba(249,216,117,.7) 26.9%,rgba(255,230,159,.7) 51.4%,rgba(249,216,117,.7) 77.4%,rgba(243,197,87,.7) 100%),
    linear-gradient(96.3deg,#f3d88c 0%,#eec870 100%);
}

/* ============ BASE ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font-body);color:var(--ink);background:var(--white);
  font-size:16px;line-height:1.6;text-wrap:pretty;-webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:400;margin:0;text-wrap:balance;line-height:1.2}
p{margin:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.br-desktop{display:inline}

/* ============ HEADER ============ */
.site-header{position:sticky;top:0;z-index:60;background:var(--white);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}
.header-inner{max-width:var(--maxw);margin:0 auto;padding:18px var(--pad);display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo img{width:115.6px;height:64px;object-fit:contain}
.header-right{display:flex;align-items:center;gap:80px}
.main-nav{display:flex;align-items:center;gap:26px}
.main-nav a{font-family:var(--font-head);font-size:15px;line-height:normal;text-transform:uppercase;color:#000;white-space:nowrap;transition:color .18s ease}
.main-nav a:hover{color:var(--gold-deep)}
.main-nav a.is-active{color:var(--gold-deep)}
.lang{display:flex;align-items:center;gap:7px}
.lang img{width:23px;height:18px;border-radius:3px;object-fit:cover}
.lang span{font-family:var(--font-head);font-size:15px;color:#000;white-space:nowrap}
.nav-toggle{display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:44px;height:44px;background:none;border:0;cursor:pointer;padding:0}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);transition:.25s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ THẺ SECTION (ribbon vàng) ============ */
.sec-tag{position:relative;height:80px;width:100%;flex:none;--tag-w:324px;--tag-wc:min(var(--tag-w),76vw)}
.sec-tag__fill{position:absolute;left:0;top:15px;width:var(--tag-wc);height:65px;background:linear-gradient(107.8deg,#f3d88c 0%,#eec870 100%);clip-path:polygon(0 0, calc(100% - 58px) 0, 100% 100%, 0 100%)}
/* đường viền là khung NGOÀI khối vàng (cao hơn, lệch lên) → hở đều quanh mép */
.sec-tag__line{position:absolute;left:0;top:7px;width:100%;height:72.5px}
.sec-tag__label{position:absolute;top:30px;left:calc((var(--tag-wc) - 29px)/2);transform:translateX(-50%);font-family:var(--font-head);font-size:clamp(18px,2.36vw,34px);line-height:1.04;text-transform:uppercase;color:var(--ink);white-space:nowrap}
.sec-tag--right .sec-tag__fill{left:auto;right:0;background:linear-gradient(-107.8deg,#f3d88c 0%,#eec870 100%);clip-path:polygon(58px 0, 100% 0, 100% 100%, 0 100%)}
.sec-tag--right .sec-tag__label{left:calc(100% - var(--tag-wc) + (var(--tag-wc) + 29px)/2)}

/* ============ NÚT ============ */
.btn-gold{position:relative;overflow:hidden;display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:15px 28px;border-radius:50px;font-family:var(--font-head);font-size:16px;color:#161310;background:linear-gradient(270deg,rgba(242,194,111,.7) 0%,rgba(249,216,117,.7) 26.9%,rgba(255,230,159,.7) 51.4%,rgba(249,216,117,.7) 77.4%,rgba(243,197,87,.7) 100%),linear-gradient(113.8deg,#f3d88c 0%,#eec870 100%);box-shadow:0 14px 30px -14px rgba(238,200,112,.8);transition:transform .18s ease,box-shadow .18s ease}
.btn-gold::before{content:"";position:absolute;inset:0;border-radius:50px;background:url('figma/btn-texture.jpg') center/cover;opacity:.1;pointer-events:none}
.btn-gold>*{position:relative;z-index:1}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 18px 34px -14px rgba(238,200,112,.95)}
.btn-gold svg{width:16px;height:16px;flex:none}
.btn-outline{display:inline-flex;align-items:center;gap:7px;padding:15px 28px;border:1px solid #45423b;border-radius:50px;font-size:15px;color:#45423b;background:none;cursor:pointer;transition:background .18s ease,color .18s ease}
.btn-outline:hover{background:#45423b;color:#fff}
.btn-outline img{width:17px;height:17px}
.btn-outline:hover img{filter:invert(1) brightness(2)}
.btn-outline--grey{border-color:#767068;color:#767068;font-size:16px}
.btn-outline--grey:hover{background:#767068;color:#fff}

/* ============ HELPER: pill / stat / section-header trang con ============ */
.cat{display:inline-flex;align-self:flex-start;background:#faf0d9;color:var(--gold-link);border-radius:100px;padding:6px 14px;font-size:12px;font-weight:600;line-height:normal}
.cat--sm{padding:5px 12px}

/* ============ HERO BANNER TRANG CON ============ */
.page-hero{position:relative;overflow:hidden;background:var(--ink);color:#fff;padding:118px 0 92px}
.page-hero__inner{position:relative;z-index:2;display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.page-hero__crumb{font-size:14px;letter-spacing:.5px;color:rgba(255,255,255,.55)}
.page-hero__crumb b{color:#edc972;font-weight:400}
.page-hero__eyebrow{display:inline-flex;align-items:center;gap:12px;font-family:var(--font-body);font-weight:600;font-size:15px;letter-spacing:2px;text-transform:uppercase;color:#edc972}
.page-hero__eyebrow::before{content:"";width:34px;height:3px;background:#edc972;flex:none}
.page-hero h1{font-size:50px;line-height:1.15;color:#fff}
.page-hero__sub{font-size:18px;line-height:1.5;color:rgba(255,255,255,.75);max-width:660px}

/* ============ BREADCRUMB ============ */
.crumb{font-size:15px;color:rgba(26,24,20,.55)}
.crumb a{color:rgba(26,24,20,.55);transition:color .18s ease}
.crumb a:hover{color:var(--gold-deep)}
.crumb b{color:var(--gold-deep);font-weight:400}
.crumb--onhero{margin-bottom:36px}

/* ============ SECTION TRANG CON ============ */
.psec{padding:96px 0}
.psec--soft{background:#f7f6f5}
.sec-head{display:flex;flex-direction:column;align-items:flex-start;gap:18px}
.sec-head h2{font-size:36px;line-height:1.2;color:var(--ink)}
.lead{font-size:16px;line-height:1.6;color:rgba(26,24,20,.82)}

/* ============ CTA / ĐĂNG KÝ TƯ VẤN + CHÂN TRANG ============ */
.sec-cta{position:relative;overflow:hidden;background:#1c1c1e;color:#fff;padding:80px 0}
.sec-cta__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.sec-cta__veil{position:absolute;inset:0;background:rgba(0,0,0,.4);z-index:1}
.sec-cta__glow{position:absolute;top:-30%;right:-10%;width:560px;height:452px;border-radius:280px;z-index:1;background:radial-gradient(closest-side,rgba(238,200,112,.2),rgba(238,200,112,0) 70%);pointer-events:none}
.sec-cta__inner{position:relative;z-index:2;display:flex;flex-direction:column;gap:20px}
.cta-row{display:flex;gap:50px;align-items:center}
.cta-left{flex:1;min-width:0}
.cta-lead{font-size:16px;line-height:22px;max-width:541px}
.cta-contacts{display:flex;flex-direction:column;gap:14px;padding-top:22px}
.cta-item{display:flex;align-items:center;gap:16px}
.gold-box{position:relative;flex:none;width:46px;height:46px;border-radius:12px;overflow:hidden;display:flex;align-items:center;justify-content:center;background:var(--grad-gold)}
.gold-box::before{content:"";position:absolute;inset:0;background:url('figma/btn-texture.jpg') center/cover;opacity:.1}
.gold-box img{position:relative;z-index:1;width:22px;height:22px}
.cta-item__label{font-family:var(--font-head);font-size:12px;line-height:19.2px;letter-spacing:1.44px;text-transform:uppercase;color:#9a9aa3}
.cta-item__value{font-size:16px;line-height:25.6px;color:#fff}
.cta-social{display:flex;flex-direction:column;align-items:flex-start;gap:12px;padding-top:20px}
.cta-social__title,.cta-copyright{font-family:var(--font-head);letter-spacing:1.44px;text-transform:uppercase;color:#fff}
.cta-social__title{font-size:12px;line-height:19.2px}
.cta-copyright{font-size:13px;line-height:20.8px;letter-spacing:normal}
.cta-social__row{display:flex;gap:12px}
.cta-social__row .gold-box img{width:26px;height:26px}
.cta-form{position:relative;flex:1;min-width:0;padding:30px;border-radius:22px;overflow:hidden;background:var(--grad-gold)}
.cta-form::before{content:"";position:absolute;inset:0;background:url('figma/btn-texture.jpg') center/cover;opacity:.1}
.cta-form form{position:relative;z-index:1;display:flex;flex-direction:column}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-size:13px;font-weight:600;line-height:20.8px;color:#45454b}
.field label i{font-style:normal;color:#a37b3a}
.field input,.field textarea{width:100%;background:#fafafa;border:1px solid #e6e6e9;border-radius:11px;padding:15px 17px;font-family:var(--font-body);font-size:15px;color:var(--ink)}
.field input::placeholder,.field textarea::placeholder{color:#d1d1d1}
.field input:focus,.field textarea:focus{outline:2px solid #a37b3a;outline-offset:1px}
.field textarea{height:71px;resize:vertical}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding-top:16px}
.field--msg{padding-top:16px}
.btn-submit{width:100%;margin-top:24px;background:var(--white);border:0;border-radius:50px;padding:15px 28px;display:flex;align-items:center;justify-content:center;gap:10px;font-family:var(--font-body);font-weight:600;font-size:15px;letter-spacing:.15px;color:#2a2410;box-shadow:0 14px 30px -14px rgba(238,200,112,.8);cursor:pointer;transition:transform .18s ease}
.btn-submit:hover{transform:translateY(-2px)}
.btn-submit img{width:16px;height:16px}

/* ==========================================================================
   RESPONSIVE (shell)
   ========================================================================== */
@media (max-width:1265px){ :root{--pad:48px} }
@media (max-width:1024px){
  :root{--pad:32px}
  .page-hero{padding:96px 0 72px}
  .page-hero h1{font-size:42px}
  .sec-cta{padding:64px 0}
  .cta-row{flex-direction:column;align-items:stretch;gap:32px}
  .cta-lead{max-width:none}
  .psec{padding:72px 0}
}
@media (max-width:768px){
  :root{--pad:20px}
  .br-desktop{display:none}
  /* Header → menu xổ */
  .nav-toggle{display:flex}
  .header-inner{padding:12px var(--pad)}
  .logo img{width:92px;height:51px}
  .header-right{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:0;background:var(--white);border-top:1px solid var(--line);padding:6px var(--pad) 18px;box-shadow:0 18px 30px -18px rgba(0,0,0,.35)}
  .header-right.is-open{display:flex}
  .main-nav{flex-direction:column;align-items:stretch;gap:0}
  .main-nav a{padding:13px 0;border-bottom:1px solid #f2eee6;font-size:16px}
  .lang{padding-top:14px}
  /* Thẻ badge nhỏ lại */
  .sec-tag{height:58px}
  .sec-tag__fill{top:11px;height:47px}
  .sec-tag__line{top:5px;height:53px}
  .sec-tag__label{top:22px}
  /* Hero banner trang con */
  .page-hero{padding:64px 0 52px}
  .page-hero h1{font-size:34px}
  .page-hero__sub{font-size:16px}
  /* Section */
  .psec{padding:56px 0}
  .sec-head h2{font-size:26px}
  /* CTA */
  .cta-form{padding:22px}
  .field-row{grid-template-columns:1fr}
  .cta-item__value{font-size:15px}
}