/* ===== Header / Navbar ===== */
.site-header {
  position: absolute; inset: 16px 0 auto; z-index: 70; /* nằm trên menu mobile để thấy nút đóng */
  padding-inline: var(--gutter);
}
@media (min-width: 1024px) { .site-header { top: 24px; } }
.navbar {
  max-width: var(--container); margin-inline: auto;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 8px 8px 8px 14px; border-radius: 14px;
  background: rgb(20 12 44 / .62);
  border: 1px solid rgb(255 255 255 / .14);
  box-shadow: 0 12px 30px rgb(0 0 0 / .35);
  -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
}
@media (min-width: 1024px) { .navbar { padding: 12px 14px 12px 20px; border-radius: 14px; } }
.navbar__brand { display: inline-flex; align-items: center; }
.navbar__brand .logo-svg { width: 120px; height: auto; }
@media (min-width: 1024px) { .navbar__brand .logo-svg { width: 140px; } }

.nav-links { display: none; }
@media (min-width: 1024px) {
  .nav-links { display: flex; gap: 6px; margin: 0; padding: 0; list-style: none; }
  .nav-links a {
    display: block; padding: 10px 18px; border-radius: var(--r-pill);
    color: var(--text-secondary); font-weight: 500; font-size: .9375rem;
    border: 1px solid transparent; transition: color var(--dur-fast), background var(--dur-fast);
  }
  .nav-links a:hover { color: var(--text-primary); }
  .nav-links .current-menu-item > a, .nav-links a[aria-current="page"] {
    color: var(--text-primary); font-weight: 600;
    background: rgb(255 255 255 / .1); border-color: rgb(255 255 255 / .14);
  }
}
.navbar__actions { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 14px;
  background: var(--glass-strong); border: 1px solid var(--glass-border);
}

/* ===== Bộ chọn ngôn ngữ ===== */
.lang-menu { position: relative; }
.lang-switch {
  display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 12px; border-radius: var(--r-pill);
  background: rgb(255 255 255 / .06); border: 1px solid rgb(255 255 255 / .12); font-size: .875rem; font-weight: 600;
  cursor: pointer; list-style: none; user-select: none; transition: background .2s, border-color .2s;
}
.lang-switch::-webkit-details-marker { display: none; }
.lang-switch:hover, .lang-menu[open] .lang-switch { background: rgb(255 255 255 / .1); border-color: rgb(255 255 255 / .2); }
.lang-switch > svg:last-child { transition: transform .2s; opacity: .7; }
.lang-menu[open] .lang-switch > svg:last-child { transform: rotate(180deg); }
.lang-switch__name { display: none; }
.lang-menu__list {
  position: absolute; right: 0; top: calc(100% + 10px); z-index: 80; min-width: 220px; margin: 0; padding: 6px; list-style: none;
  background: rgb(18 12 38 / .96); border: 1px solid var(--glass-border); border-radius: 12px;
  box-shadow: 0 24px 60px rgb(0 0 0 / .45); backdrop-filter: blur(16px);
  animation: lang-pop .18s var(--ease-out);
}
@keyframes lang-pop { from { opacity: 0; transform: translateY(-6px); } }
.lang-menu__list a {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 10px;
  font-size: .9375rem; font-weight: 500; color: var(--text-body);
}
.lang-menu__list a:hover { background: rgb(255 255 255 / .06); color: var(--text-primary); }
.lang-menu__list a[aria-current] { color: var(--text-primary); background: rgb(168 85 247 / .14); }
.lang-menu__list a > svg { margin-left: auto; color: var(--cyan); }
.lang-menu__code {
  display: inline-grid; place-items: center; min-width: 30px; height: 22px; padding: 0 6px; border-radius: 6px;
  font-size: .6875rem; font-weight: 800; letter-spacing: .04em; background: rgb(255 255 255 / .08); color: var(--text-secondary);
}
@media (min-width: 1024px) {
  .lang-switch { padding: 0 14px; }
  .lang-switch__name { display: inline; }
  .lang-switch__code { display: none; }
  .menu-toggle { display: none; }
}
@media (max-width: 1023px) { .navbar__actions .lang-menu { display: none; } }

/* ===== Menu mobile ===== */
.mobile-menu {
  position: fixed; inset: 0; z-index: 60; overflow: hidden;
  display: flex; flex-direction: column; gap: 16px;
  padding: 96px 16px max(20px, env(safe-area-inset-bottom));
  background: #0B0819; /* nền đặc: không để lộ nội dung trang phía sau */
  opacity: 0; visibility: hidden;
  transition: opacity .25s var(--ease-out), visibility 0s .25s;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; transition-delay: 0s; }
.mobile-menu__glow {
  position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(420px 260px at 85% 0%, rgb(168 85 247 / .22), transparent 70%),
    radial-gradient(360px 240px at 0% 100%, rgb(255 79 216 / .12), transparent 70%);
}
.mobile-menu__scroll { flex: 1; min-height: 0; overflow-y: auto; display: grid; align-content: start; gap: 22px; padding-bottom: 8px; }

/* Danh sách điều hướng: một khối, các dòng mảnh có mũi tên */
.mobile-menu__group {
  border-radius: var(--r-lg); background: rgb(255 255 255 / .035); border: 1px solid var(--glass-border-soft); overflow: hidden;
}
.mobile-menu__list { margin: 0; padding: 0; list-style: none; display: block; }
.mobile-menu__list li + li { border-top: 1px solid rgb(255 255 255 / .06); }
.mobile-menu__list a {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 16px 18px; font-size: 1.0625rem; font-weight: 500; color: var(--text-body);
  background: none; border: 0; border-radius: 0; transition: background .2s, color .2s;
}
.mobile-menu__list a::after {
  content: ""; width: 8px; height: 8px; flex: none; margin-right: 4px;
  border-right: 2px solid currentColor; border-top: 2px solid currentColor; transform: rotate(45deg); opacity: .4;
}
.mobile-menu__list a:active, .mobile-menu__list a:hover { background: rgb(255 255 255 / .04); color: var(--text-primary); }
.mobile-menu__list a[aria-current="page"], .mobile-menu__list .current-menu-item > a {
  color: var(--text-primary); font-weight: 600;
  background: linear-gradient(90deg, rgb(255 79 216 / .16), transparent 80%);
  box-shadow: inset 3px 0 0 var(--pink);
}
.mobile-menu__list a[aria-current="page"]::after { opacity: .9; color: var(--pink); }

/* Ngôn ngữ: tiêu đề nhỏ + lưới 2 cột */
.mobile-menu__label { margin: 0 4px 10px; font-size: .75rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--text-tertiary); }
.mobile-menu .mobile-langs { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.mobile-menu .mobile-langs a {
  display: flex; align-items: center; gap: 10px; min-height: 48px; padding: 10px 12px;
  border-radius: var(--r-md); font-size: .9375rem; font-weight: 500; color: var(--text-body);
  background: rgb(255 255 255 / .035); border: 1px solid var(--glass-border-soft); transition: border-color .2s, background .2s;
}
.mobile-menu .mobile-langs a .st-flag { width: 22px; height: 16px; }
.mobile-langs__name { flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mobile-menu .mobile-langs a > svg { flex: none; color: var(--pink); }
.mobile-menu .mobile-langs a[aria-current] { color: var(--text-primary); border-color: rgb(255 79 216 / .55); background: rgb(255 79 216 / .1); }

/* Nút tải cố định ở đáy */
.mobile-menu__cta { flex: none; width: 100%; justify-content: center; gap: 8px; min-height: 52px; }

/* Mở menu: các khối trượt nhẹ lên lần lượt */
.mobile-menu__group, .mobile-menu__section, .mobile-menu__cta { transform: translateY(8px); opacity: 0; transition: transform .35s var(--ease-out), opacity .35s var(--ease-out); }
.mobile-menu.is-open .mobile-menu__group { transform: none; opacity: 1; transition-delay: .04s; }
.mobile-menu.is-open .mobile-menu__section { transform: none; opacity: 1; transition-delay: .1s; }
.mobile-menu.is-open .mobile-menu__cta { transform: none; opacity: 1; transition-delay: .16s; }
@media (prefers-reduced-motion: reduce) { .mobile-menu__group, .mobile-menu__section, .mobile-menu__cta { transform: none; transition: opacity .2s; } }

body.menu-open { overflow: hidden; }
body.menu-open .site-header { position: fixed; top: 16px; }
@media (min-width: 1024px) { .mobile-menu { display: none; } }

/* ===== Footer ===== */
.site-footer {
  position: relative; overflow: hidden;
  background: var(--bg-footer);
  padding-top: clamp(48px, 6vw, 72px);
}
.site-footer::before {
  content: ""; position: absolute; inset: 0 0 auto; height: 1px;
  background: linear-gradient(90deg, transparent, rgb(168 85 247 / .8), transparent);
}
.footer-grid { display: grid; gap: 32px; grid-template-columns: 1fr 1fr; }
.footer-brand { grid-column: 1 / -1; display: grid; gap: 16px; align-content: start; max-width: 320px; }
@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.4fr repeat(3, 1fr) auto; gap: 40px; }
  .footer-brand { grid-column: auto; }
}
.footer-brand p, .footer-col a { color: var(--text-secondary); font-size: var(--fs-sm); }
.footer-col__title { font-size: .9375rem; font-weight: 700; letter-spacing: 0; margin-bottom: 14px; }
.footer-col ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.footer-col a:hover { color: var(--text-primary); }
.socials { display: flex; gap: 10px; }
.socials a {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px;
  background: rgb(255 255 255 / .06); border: 1px solid rgb(255 255 255 / .12);
}
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between;
  margin-top: 40px; padding-top: 24px; border-top: 1px solid rgb(255 255 255 / .08);
  color: var(--text-tertiary); font-size: var(--fs-xs);
}
.footer-wordmark {
  margin: 24px 0 0; text-align: center; font-weight: 900; line-height: .78; letter-spacing: -0.005em;
  font-size: clamp(6.5rem, 22vw, 18.75rem);
  background: linear-gradient(180deg, rgb(255 255 255 / .14), rgb(255 255 255 / 0));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  user-select: none;
}

/* ===== Trang tạm (giai đoạn 0) ===== */
.page-hero {
  position: relative; isolation: isolate; overflow: hidden;
  min-height: 100svh; display: grid; place-items: center; text-align: center;
  padding: 140px var(--gutter) 80px;
}
.page-hero__bg { position: absolute; inset: 0; z-index: -2; }
.page-hero__bg picture, .page-hero__bg img { width: 100%; height: 100%; object-fit: cover; }
.page-hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgb(10 7 24 / .45), rgb(10 7 24 / .25) 45%, var(--bg-base));
}
.page-hero h1 { font-size: var(--fs-h1); letter-spacing: -0.005em; }
.page-hero .lead { margin-top: 18px; color: var(--text-secondary); font-size: var(--fs-lead); font-weight: 500; }
.page-hero .actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

/* Navbar ở màn 1024–1279px: gọn hơn để menu không xuống dòng */
.nav-links a, .navbar__cta { white-space: nowrap; }
@media (min-width: 1024px) and (max-width: 1279px) {
  .nav-links { gap: 2px; }
  .nav-links a { padding-inline: 12px; }
  .lang-switch__name { display: none; }
  .lang-switch__code { display: inline; }
}

/* Cờ ngôn ngữ (ảnh SVG từ plugin) */
.st-flag { display: inline-block; flex: none; width: 20px; height: 15px; border-radius: 3px; object-fit: cover; box-shadow: 0 0 0 1px rgb(255 255 255 / .12); }
.st-flag--code { display: inline-grid; place-items: center; width: auto; min-width: 22px; padding: 0 4px; font-size: .625rem; font-weight: 700; background: rgb(255 255 255 / .1); color: var(--text-secondary); }
.lang-menu__list a > .lang-menu__name { flex: 1; }
.lang-menu__list a > .lang-menu__code { order: 3; }
.lang-menu__list a > svg { order: 4; margin-left: 0; }
.lang-menu__list { max-height: min(70vh, 420px); overflow: auto; }

/* ===== Ngôn ngữ: thu gọn trên di động + ô tìm khi có nhiều ngôn ngữ ===== */
.mobile-lang { border-radius: var(--r-lg); background: rgb(255 255 255 / .035); border: 1px solid var(--glass-border-soft); overflow: hidden; }
.mobile-lang__toggle { display: flex; align-items: center; gap: 10px; padding: 14px 16px; cursor: pointer; list-style: none; }
.mobile-lang__toggle::-webkit-details-marker { display: none; }
.mobile-lang__toggle .mobile-menu__label { margin: 0; flex: 1; }
.mobile-lang__current { display: inline-flex; align-items: center; gap: 8px; font-size: .9375rem; font-weight: 600; color: var(--text-primary); }
.mobile-lang__current .st-flag { width: 22px; height: 16px; }
.mobile-lang__toggle > svg { flex: none; color: var(--text-tertiary); transition: transform .2s; }
.mobile-lang[open] .mobile-lang__toggle > svg { transform: rotate(180deg); }
.mobile-lang__body { display: grid; gap: 10px; padding: 0 12px 12px; }
.mobile-lang[open] .mobile-lang__body { animation: lang-pop .2s var(--ease-out); }

.lang-search {
  width: 100%; min-height: 42px; padding: 0 14px 0 38px; border-radius: 12px; border: 1px solid var(--glass-border-soft);
  background: rgb(255 255 255 / .05) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238A84AA' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E") no-repeat 13px center;
  color: var(--text-primary); font: inherit; font-size: .9375rem; outline: 0;
}
.lang-search:focus { border-color: rgb(255 79 216 / .55); }
[data-lang-list] li[hidden] { display: none !important; }
[data-lang-list].is-empty::after { content: attr(data-empty); display: block; grid-column: 1 / -1; padding: 10px 4px; color: var(--text-tertiary); font-size: .875rem; }

/* Máy tính: khung chứa ô tìm + danh sách cuộn */
.lang-menu__panel {
  position: absolute; right: 0; top: calc(100% + 10px); z-index: 80; width: 260px; padding: 6px;
  background: rgb(18 12 38 / .97); border: 1px solid var(--glass-border); border-radius: 16px;
  box-shadow: 0 24px 60px rgb(0 0 0 / .45); backdrop-filter: blur(16px); animation: lang-pop .18s var(--ease-out);
}
.lang-menu__panel .lang-search { margin-bottom: 6px; min-height: 38px; }
.lang-menu__panel .lang-menu__list { position: static; width: auto; min-width: 0; padding: 0; border: 0; background: none; box-shadow: none; backdrop-filter: none; animation: none; max-height: min(60vh, 360px); overflow: auto; }