/* ============================================================
   LAYOUT — Header / Footer dùng chung
   Chỉ dùng biến từ tokens.css, không khai báo màu mới ở đây.
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-base) var(--ease-standard), box-shadow var(--duration-base) var(--ease-standard);
}
.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-1);
}
.site-header__inner {
  max-width: 1340px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.site-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-family-display);
  font-weight: 700;
  font-size: var(--text-h4);
  color: var(--color-text);
  white-space: nowrap;
  letter-spacing: -0.02em;
}
.site-header__logo:hover { text-decoration: none; }
.site-header__logo-mark {
  width: 32px; height: 32px; border-radius: 50%;
  object-fit: cover; flex-shrink: 0;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
}
.site-header__right { display: flex; align-items: center; gap: var(--space-2); }
.site-header__auth { display: inline-flex; align-items: center; gap: 8px; }

.site-header__nav {
  display: flex;
  gap: 0;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.site-header__nav::-webkit-scrollbar { display: none; }
.site-header__nav a {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
  white-space: nowrap;
  padding: var(--space-2) 7px;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-standard);
}
.site-header__nav a:hover {
  color: var(--color-text);
  background: var(--color-surface-alt);
  text-decoration: none;
}
.site-header__nav a.is-active {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  font-weight: 600;
  text-decoration: none;
}

/* ---- Icon tìm kiếm ---- */
.site-header__icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  background: none; border: none; border-radius: var(--radius-full);
  font-size: 1.05rem; cursor: pointer; color: var(--color-text-muted);
  transition: background var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
}
.site-header__icon-btn:hover { background: var(--color-surface-alt); color: var(--color-text); }

/* ---- Pill Streak (chuỗi ngày học liên tiếp) ---- */
.site-header__streak {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 10px;
  border-radius: var(--radius-full);
  background: var(--color-accent-soft);
  color: var(--color-accent-hover);
  font-family: var(--font-family-mono);
  font-weight: 700;
  font-size: var(--text-body-sm);
  white-space: nowrap;
  transition: transform var(--duration-fast) var(--ease-standard);
}
.site-header__streak:hover { transform: scale(1.05); text-decoration: none; }
.site-header__streak-fire { font-size: 0.95rem; }
.site-header__streak[hidden] { display: none; }

/* ---- Overlay tìm kiếm nhanh ---- */
.search-overlay {
  position: fixed; inset: 0; z-index: 300;
  background: var(--color-overlay);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 12vh var(--space-3) var(--space-3);
}
.search-overlay[hidden] { display: none; }
.search-overlay__panel {
  width: 100%; max-width: 560px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-4);
  padding: var(--space-3);
}
.search-overlay__form {
  display: flex; align-items: center; gap: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
}
.search-overlay__icon { font-size: 1rem; color: var(--color-text-muted); }
.search-overlay__input {
  flex: 1; border: none; outline: none; background: none;
  font-size: var(--text-body-lg); color: var(--color-text);
  font-family: var(--font-family-base);
}
.search-overlay__close {
  border: none; background: none; cursor: pointer;
  font-size: 1rem; color: var(--color-text-faint); padding: 4px;
}
.search-overlay__hint {
  margin-top: var(--space-2);
  font-size: var(--text-caption);
  color: var(--color-text-faint);
}

@media (max-width: 1260px) {
  .site-header__nav { display: none; }
  .site-header__menu-toggle { display: block; background: none; border: none; font-size: var(--font-size-lg); cursor: pointer; color: var(--color-text); }
  .site-header__nav.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-3);
    box-shadow: var(--shadow-2);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }
  .site-header__streak span:not(.site-header__streak-fire) { display: none; }
}
@media (min-width: 1261px) {
  .site-header__menu-toggle { display: none; }
}
@media (max-width: 480px) {
  .site-header__streak { display: none; }
  /* "Bảng điều khiển" + "Đăng xuất" (2 nút khi đã đăng nhập) không đủ chỗ
     cạnh icon tìm kiếm/theme/hamburger ở màn hình rất hẹp — thu nhỏ chữ/
     khoảng đệm thay vì ẩn bớt nút (ẩn "Bảng điều khiển" sẽ mất chức năng,
     vì đây là đường dẫn DUY NHẤT vào Dashboard trên mobile — menu hamburger
     hiện chỉ có 7 mục điều hướng chính, không có mục Dashboard). */
  .site-header__auth { gap: 4px; }
  .site-header__auth a.btn-secondary,
  .site-header__auth .btn-primary {
    padding: 6px 8px;
    font-size: 12px;
    margin-right: 0 !important;
  }
  .site-header__right { gap: 4px; }
}

.site-footer {
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-6);
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-4);
}
@media (max-width: 980px) {
  .site-footer__inner { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 700px) {
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
}
.site-footer__col h4 {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  margin: 0 0 var(--space-2);
  font-family: var(--font-family-base);
}
.site-footer__col a {
  display: block;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  padding: var(--space-1) 0;
}
.site-footer__desc {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}
.site-footer__bottom {
  border-top: 1px solid var(--color-border);
  padding: var(--space-3) 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  text-align: center;
}

/* --- Banner quảng cáo Tour chạy chữ ngang (marquee), toàn site, nhỏ gọn --- */
.mabu-marquee {
  width: 100%;
  height: 28px;
  overflow: hidden;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  white-space: nowrap;
}
.mabu-marquee__track {
  display: inline-block;
  color: #fff;
  font-size: var(--text-caption);
  font-weight: 600;
  text-decoration: none;
  padding-left: 100%;
  animation-name: mabuMarqueeScroll;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}
@keyframes mabuMarqueeScroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* --- Widget liên hệ nổi (Zalo + TikTok), góc dưới phải, toàn site —
   THIẾT KẾ LẤY ĐÚNG THEO bản web cũ (module "Floating Support Hub") --- */
.sh-live-badge {
  position: fixed; right: 20px; bottom: 120px; z-index: 999; display: flex; align-items: center; gap: 5px;
  background: linear-gradient(120deg, #ff2b54, #7a1fd6); color: #fff; border: none; border-radius: 999px;
  padding: 7px 12px 7px 9px; font-size: 0.68rem; font-weight: 800; cursor: pointer; font-family: inherit;
  box-shadow: 0 8px 18px -6px rgba(122,31,214,0.55);
}
.sh-live-dot { width: 7px; height: 7px; border-radius: 50%; background: #fff; animation: sh-live-pulse 1.4s ease-in-out infinite; }
@keyframes sh-live-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.7); }
}
.sh-fab {
  position: fixed; right: 20px; bottom: 56px; width: 60px; height: 60px; border-radius: 50%;
  background: linear-gradient(135deg, #2196FF, #0068FF);
  box-shadow: 0 10px 28px -8px rgba(0,104,255,0.55);
  border: none; cursor: pointer; z-index: 999; display: flex; align-items: center; justify-content: center;
  padding: 0; transition: box-shadow .25s ease, transform .1s ease;
  animation: sh-glow 2.6s ease-in-out infinite;
}
.sh-fab:hover { box-shadow: 0 14px 32px -8px rgba(0,104,255,0.65), 0 0 0 8px rgba(0,104,255,0.18); }
.sh-fab:active { transform: scale(0.94); }
.sh-fab svg { pointer-events: none; }
@keyframes sh-glow {
  0%, 100% { box-shadow: 0 10px 28px -8px rgba(0,104,255,0.55), 0 0 0 0 rgba(0,104,255,0.45); }
  50% { box-shadow: 0 10px 28px -8px rgba(0,104,255,0.55), 0 0 0 9px rgba(0,104,255,0); }
}
@media (max-width: 640px) {
  /* Trên mobile, App Shell có thanh điều hướng dưới cùng cao var(--bottom-nav-height) = 60px
     (xem shared/layout/app-shell.css) — giữ khoảng hở an toàn phía trên thanh đó. */
  .sh-fab { right: 14px; bottom: 70px; }
  .sh-live-badge { right: 14px; bottom: 134px; }
}