/* ══════════════════════════════════════
   main.css – Shared styles · EnglishWithDan
   Import font before this file:
   https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800;900&display=swap
══════════════════════════════════════ */

/* ── TOKENS ── */
:root {
  --blue:#3d8bff; --blue-dark:#2c78f0; --blue-light:#eff6ff;
  --red:#e53935;  --red-light:#fef2f2;
  --dark:#0f172a; --gray:#64748b; --border:#e5e7eb;
  --bg:#f8fafc;   --white:#fff;
  --radius:14px;  --radius-sm:9px;
  --shadow:0 2px 16px rgba(0,0,0,.07);
  --shadow-lg:0 8px 40px rgba(0,0,0,.12);
  --font:'Plus Jakarta Sans',sans-serif;
}

/* ── RESET ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--dark);background:var(--white);line-height:1.6;font-size:15px}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font-family:inherit;cursor:pointer}

/* ── NAVBAR ── */
.navbar{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  padding:0 24px;height:64px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:21px;font-weight:900;letter-spacing:-.5px;text-decoration:none}
.nav-logo .d{color:var(--blue)}.nav-logo .h{color:var(--red)}
.nav-logo-sub{font-size:11px;font-weight:600;color:var(--gray);letter-spacing:.5px;line-height:1}
.nav-logo-img{height:46px;width:auto;display:block}
.footer-logo-img{height:54px;width:auto;display:block;margin-bottom:12px;background:rgba(255,255,255,.08);border-radius:10px;padding:6px 10px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  padding:8px 14px;border-radius:var(--radius-sm);
  font-size:14px;font-weight:600;color:var(--gray);
  transition:all .15s;white-space:nowrap;
}
.nav-links a:hover{color:var(--dark);background:var(--bg)}
.nav-links a.active{color:var(--blue);background:var(--blue-light)}
.nav-cta{display:flex;align-items:center;gap:8px}

/* ── BUTTONS ── */
.btn{display:inline-flex;align-items:center;gap:7px;padding:9px 20px;border-radius:var(--radius-sm);font-size:14px;font-weight:700;border:none;transition:all .17s;white-space:nowrap;cursor:pointer}
.btn-outline{background:none;border:1.5px solid var(--border);color:var(--dark)}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark);transform:translateY(-1px)}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:#c62828;transform:translateY(-1px)}
.btn-lg{padding:13px 28px;font-size:16px;border-radius:12px}
.btn-xl{padding:16px 36px;font-size:17px;border-radius:14px}

/* ── HAMBURGER / MOBILE MENU ── */
.nav-hamburger{display:none;background:none;border:none;font-size:22px;color:var(--dark);padding:4px}
.mobile-menu{
  display:none;position:fixed;inset:64px 0 0 0;z-index:99;
  background:var(--white);border-top:1px solid var(--border);
  flex-direction:column;padding:24px;gap:8px;
  overflow-y:auto;
}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:14px 16px;border-radius:var(--radius-sm);font-weight:600;font-size:16px;color:var(--dark);border-bottom:1px solid var(--border)}

/* ── SECTION COMMON ── */
.section-tag{
  display:inline-block;background:var(--blue-light);
  color:var(--blue);font-size:12px;font-weight:700;
  padding:5px 13px;border-radius:20px;letter-spacing:.5px;
  text-transform:uppercase;margin-bottom:14px;
}
.section-title{font-size:clamp(26px,3vw,38px);font-weight:900;letter-spacing:-.5px;margin-bottom:10px}
.section-sub{font-size:16px;color:var(--gray);max-width:560px}
.section-head{margin-bottom:48px}

/* ── PAGE HERO (breadcrumb banner) ── */
.page-hero{
  background:linear-gradient(135deg,#0f172a 0%,#1e3a5f 100%);
  padding:56px 80px 48px;
  color:var(--white);
}
.page-hero-inner{max-width:640px}
.page-hero .breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:rgba(255,255,255,.5);margin-bottom:16px;
}
.page-hero .breadcrumb a{color:rgba(255,255,255,.5);transition:color .15s}
.page-hero .breadcrumb a:hover{color:var(--white)}
.page-hero .breadcrumb span{color:var(--white);font-weight:600}
.page-hero h1{font-size:clamp(28px,3.5vw,48px);font-weight:900;letter-spacing:-.5px;margin-bottom:12px}
.page-hero p{font-size:16px;color:rgba(255,255,255,.7);max-width:520px;line-height:1.75}

/* ── FOOTER ── */
.footer{
  background:#0f172a;padding:48px 80px 28px;
  border-top:1px solid rgba(255,255,255,.06);
}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand .nav-logo{margin-bottom:14px}
.footer-brand p{font-size:13px;color:rgba(255,255,255,.5);line-height:1.75;max-width:280px}
.footer-col h4{font-size:13px;font-weight:700;color:var(--white);text-transform:uppercase;letter-spacing:.7px;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul li a{font-size:13px;color:rgba(255,255,255,.5);transition:color .15s}
.footer-col ul li a:hover{color:var(--white)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:22px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer-bottom p{font-size:12px;color:rgba(255,255,255,.35)}
.footer-socials{display:flex;gap:12px}
.social-btn{
  width:34px;height:34px;border-radius:8px;
  background:rgba(255,255,255,.07);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;color:rgba(255,255,255,.5);
  transition:all .15s;
}
.social-btn:hover{background:var(--blue);color:#fff}

/* ── CONTACT FORM (shared) ── */
.contact-section{
  background:linear-gradient(135deg,#0f172a 0%,#1e3a5f 100%);
  color:var(--white);
  padding:80px 80px;
}
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
.contact-left h2{font-size:clamp(26px,3vw,38px);font-weight:900;margin-bottom:14px}
.contact-left p{font-size:16px;color:rgba(255,255,255,.7);line-height:1.75;margin-bottom:28px}
.contact-info-list{display:flex;flex-direction:column;gap:16px}
.contact-info-item{display:flex;align-items:center;gap:14px}
.contact-info-item .ci-icon{
  width:44px;height:44px;border-radius:10px;
  background:rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;flex-shrink:0;
}
.contact-info-item div{font-size:14px;color:rgba(255,255,255,.6)}
.contact-info-item strong{display:block;font-size:15px;color:var(--white);font-weight:700}
.form-card{
  background:var(--white);border-radius:20px;
  padding:36px;box-shadow:var(--shadow-lg);
}
.form-card h3{font-size:20px;font-weight:800;color:var(--dark);margin-bottom:22px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-group{margin-bottom:14px}
.form-group label{display:block;font-size:13px;font-weight:700;color:var(--dark);margin-bottom:6px}
.form-group input,
.form-group select,
.form-group textarea{
  width:100%;padding:11px 14px;
  border:1.5px solid var(--border);border-radius:var(--radius-sm);
  font-size:14px;font-family:inherit;outline:none;
  background:var(--bg);color:var(--dark);
  transition:border-color .15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus{border-color:var(--blue);background:#fff}
.form-group textarea{resize:vertical;min-height:90px}
.form-submit{width:100%;padding:14px;font-size:15px;font-weight:800;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--red));color:#fff;border:none;cursor:pointer;transition:opacity .15s}
.form-submit:hover{opacity:.9}
.form-submit:disabled{opacity:.6;cursor:not-allowed}
#form-msg{margin-top:12px;font-size:14px;font-weight:600;text-align:center}
#form-msg.success{color:#16a34a}
#form-msg.error{color:var(--red)}

/* ── FLOATING ZALO ── */
.zalo-float{position:fixed;bottom:28px;right:28px;z-index:9999;display:flex;flex-direction:column;align-items:center;gap:6px;text-decoration:none}
.zalo-float img{width:56px;height:56px;border-radius:50%;box-shadow:0 4px 16px rgba(0,104,255,.45);animation:zalo-pulse 2.2s infinite;transition:transform .2s}
.zalo-float:hover img{transform:scale(1.1);animation:none}
.zalo-float-label{background:#0068FF;color:#fff;font-size:11px;font-weight:700;padding:2px 8px;border-radius:10px;opacity:0;transform:translateY(4px);transition:opacity .2s,transform .2s;white-space:nowrap}
.zalo-float:hover .zalo-float-label{opacity:1;transform:translateY(0)}
@keyframes zalo-pulse{0%,100%{box-shadow:0 4px 16px rgba(0,104,255,.45)}50%{box-shadow:0 4px 28px rgba(0,104,255,.8),0 0 0 8px rgba(0,104,255,.12)}}
@media(max-width:600px){.zalo-float{bottom:18px;right:16px}.zalo-float img{width:48px;height:48px}}

/* ── RESPONSIVE ── */
@media(max-width:1024px){
  .navbar{padding:0 20px}
  .footer-top{grid-template-columns:1fr 1fr}
  .footer{padding:40px 40px 24px}
  .contact-section{padding:60px 40px}
  .page-hero{padding:40px 40px 36px}
}
@media(max-width:768px){
  .navbar{padding:0 18px}
  .nav-links,.nav-cta{display:none}
  .nav-hamburger{display:block}
  .contact-wrap{grid-template-columns:1fr;gap:36px}
  .form-row{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .footer{padding:40px 20px 20px}
  .footer-bottom{flex-direction:column;text-align:center}
  .contact-section{padding:48px 20px}
  .page-hero{padding:36px 20px 28px}
}