/* ==========================================================================
   Tàu Hũ Tươi Phúc An — components.css
   Các thành phần tái sử dụng: logo, button, toggle, card, icon...
   ========================================================================== */

/* ---------- "Ánh nước" — dải sóng chữ ký (2026-08-21, làm mới giao diện) ----------
   Divider trang trí thuần tuý (aria-hidden), không mang nội dung. Gợi cảm giác
   "thanh mát" của tàu hũ tươi bằng 2 màu ngọc bích + xanh dương nhạt — điểm
   nhấn RIÊNG, tách khỏi vàng gold vốn dành cho khu Menu/Đặt hàng. */
.water-divider {
  width: 100%;
  padding: 18px 0;
  overflow: hidden;
  line-height: 0;
}

.water-divider svg {
  display: block;
  width: 100%;
  height: 28px;
}

.water-divider__path {
  fill: none;
  stroke: var(--color-jade);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 14 10;
  opacity: 0.75;
  animation: water-divider-flow 7s linear infinite;
}

[data-theme='dark'] .water-divider__path {
  stroke: var(--color-sky);
}

@keyframes water-divider-flow {
  to { stroke-dashoffset: -240; }
}

@media (prefers-reduced-motion: reduce) {
  .water-divider__path { animation: none; }
}

/* ---------- Banner khuyến mãi (đầu trang, Admin bật/tắt) ---------- */
.promo-banner {
  margin: 0;
  padding: 10px 20px;
  text-align: center;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-on-gold);
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-strong));
}

/* ---------- Logo ---------- */
.logo-link {
  display: inline-flex;
  flex-shrink: 0;
  min-width: 0;
}

.logo-badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  padding: 6px 14px;
  border-radius: var(--radius-md);
  background-color: var(--logo-badge-bg);
  border: 1px solid var(--logo-badge-border);
  transition: background-color var(--transition-theme), border-color var(--transition-theme), backdrop-filter var(--transition-theme);
}

/* Glass effect: chỉ áp dụng khi ở Dark Mode (logo nền sáng cần khung kính mờ để nổi bật) */
[data-theme='dark'] .logo-badge {
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12), var(--shadow-sm);
}

.logo-badge::before {
  content: '';
  position: absolute;
  inset: -14px;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle, var(--logo-badge-glow) 0%, transparent 72%);
  z-index: -1;
}

.logo-badge img {
  height: 46px;
  width: auto;
  flex-shrink: 0;
  max-width: none;
}

@media (min-width: 1024px) {
  .logo-badge img {
    height: 52px;
  }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-primary);
  filter: brightness(0.93);
  transform: translateY(-2px) scale(1.015);
  box-shadow: var(--shadow-md);
}

[data-theme='dark'] .btn--primary:hover,
[data-theme='dark'] .btn--primary:focus-visible {
  filter: brightness(1.1);
}

/* NÚT CAM GỪNG — MÀU HÀNH ĐỘNG MUA. Dùng nhất quán cho: đặt tàu hũ, chọn vị,
   đặt combo, tiếp tục đặt hàng, xác nhận đơn. Không dùng cho nút thông tin. */
.btn--cta {
  background-color: var(--color-cta);
  color: var(--color-on-cta);
  box-shadow: 0 4px 14px rgba(var(--color-cta-rgb), 0.32);
}

.btn--cta:hover,
.btn--cta:focus-visible {
  background-color: var(--color-cta-hover);
  transform: translateY(-2px) scale(1.015);
  box-shadow: 0 8px 22px rgba(var(--color-cta-rgb), 0.4);
}

/* Nút vàng gold — dành cho điểm nhấn phụ (giữ lại tông vàng thương hiệu ở
   những chỗ KHÔNG phải hành động mua chính). */
.btn--gold {
  background-color: var(--color-gold);
  color: var(--color-on-gold);
  box-shadow: var(--shadow-sm);
}

.btn--gold:hover,
.btn--gold:focus-visible {
  background-color: var(--color-gold-strong);
  transform: translateY(-2px) scale(1.015);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-heading);
  border: 1.5px solid var(--color-border);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  border-color: var(--color-gold);
  color: var(--color-gold-strong);
  background-color: rgba(var(--color-gold-rgb), 0.06);
  transform: translateY(-2px);
}

[data-theme='dark'] .btn--secondary:hover,
[data-theme='dark'] .btn--secondary:focus-visible {
  color: var(--color-gold);
}

.btn--block {
  width: 100%;
}

/* .btn luôn set display, nên thuộc tính [hidden] cần được nhắc lại tường minh để thắng */
.btn[hidden] {
  display: none;
}

.btn--on-dark {
  border-color: rgba(243, 236, 221, 0.35);
  color: #f3ecdd;
}

.btn--on-dark:hover,
.btn--on-dark:focus-visible {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

/* ---------- Theme toggle ---------- */
.theme-toggle,
.theme-fab {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle:hover,
.theme-toggle:focus-visible,
.theme-fab:hover,
.theme-fab:focus-visible {
  border-color: var(--color-gold);
  background-color: var(--color-bg-soft);
}

.theme-toggle svg,
.theme-fab svg {
  position: absolute;
  width: 20px;
  height: 20px;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.theme-toggle .icon-sun,
.theme-fab .icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-toggle .icon-moon,
.theme-fab .icon-moon {
  opacity: 0;
  transform: rotate(-60deg) scale(0.6);
}

[data-theme='dark'] .theme-toggle .icon-sun,
[data-theme='dark'] .theme-fab .icon-sun {
  opacity: 0;
  transform: rotate(60deg) scale(0.6);
}

[data-theme='dark'] .theme-toggle .icon-moon,
[data-theme='dark'] .theme-fab .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ---------- Nút nổi đổi Chế độ tối/sáng — chỉ hiện ở mobile/tablet (<768px);
   desktop đã có icon này ngay trong header, không cần thêm nút nổi. Đặt CÙNG
   bên phải với nút Chat nổi, xếp ngay phía trên — không còn đối xứng trái/phải
   như trước (theo yêu cầu gom 2 nút nổi về cùng 1 bên). */
.theme-fab {
  position: fixed;
  right: 18px;
  bottom: 84px;
  z-index: 150;
  width: 50px;
  height: 50px;
  background-color: var(--color-surface);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  box-shadow: var(--shadow-lg);
}

.theme-fab:hover,
.theme-fab:focus-visible {
  transform: translateY(-3px);
}

@media (min-width: 768px) {
  .theme-fab {
    display: none;
  }
}

/* ---------- Hamburger ---------- */
.hamburger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
}

.hamburger span {
  width: 18px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.hamburger[aria-expanded='true'] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded='true'] span:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded='true'] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Nav link (desktop) ---------- */
.nav-link {
  position: relative;
  font-weight: 500;
  color: var(--color-text);
  padding-block: 6px;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-gold);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-gold-strong);
}

[data-theme='dark'] .nav-link:hover,
[data-theme='dark'] .nav-link:focus-visible {
  color: var(--color-gold);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  width: 100%;
}

/* ---------- Card chung ---------- */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-theme),
    border-color var(--transition-theme);
}

/* ---------- Product card — thẻ hương vị cao cấp: ảnh lớn trên nền tông hương vị,
   thông tin gọn, nút "Đặt" rõ ràng. Giữ nguyên các hook data-* cho order.js /
   site-sync.js. ---------- */
.product-card {
  --flavor: var(--color-bg-soft);
  --flavor-ink: var(--color-gold-strong);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.product-card[data-product-id='truyen-thong'] { --flavor: var(--flavor-truyenthong); --flavor-ink: var(--flavor-truyenthong-ink); }
.product-card[data-product-id='matcha']       { --flavor: var(--flavor-matcha);       --flavor-ink: var(--flavor-matcha-ink); }
.product-card[data-product-id='me-den']       { --flavor: var(--flavor-meden);        --flavor-ink: var(--flavor-meden-ink); }
.product-card[data-product-id='khoai-mon']    { --flavor: var(--flavor-khoaimon);     --flavor-ink: var(--flavor-khoaimon-ink); }

.product-card {
  border-top: 3px solid var(--flavor-ink);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--flavor-ink) 45%, transparent);
}

.product-card__media {
  width: 100%;
}

.product-card__media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  padding: 0;
  border-radius: 0;
  background:
    radial-gradient(120% 100% at 50% 0%, color-mix(in srgb, var(--flavor) 22%, #fff) 0%, #ffffff 62%);
  overflow: hidden;
}

.product-card__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 6% 8%;
  display: block;
  transition: transform var(--transition-base);
}

.product-card:hover .product-card__media img {
  transform: scale(1.05) rotate(-1deg);
}

.product-card__info {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-md) var(--space-md) 0;
}

.product-card__name {
  font-size: 1.2rem;
  margin: 0;
}

.product-card__price {
  order: -1;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--flavor-ink);
  white-space: nowrap;
}

.product-card__desc {
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 2px 0 0;
  color: var(--color-text-muted);
}

.product-card__cta {
  margin: var(--space-md);
  padding: 12px 20px;
  gap: 8px;
  align-self: stretch;
  justify-content: center;
  background: var(--color-cta);
  color: var(--color-on-cta);
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  box-shadow: 0 4px 14px rgba(var(--color-cta-rgb), 0.32);
  transition: filter var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.product-card__cta:hover,
.product-card__cta:focus-visible {
  filter: brightness(0.93);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

[data-theme='dark'] .product-card__cta:hover,
[data-theme='dark'] .product-card__cta:focus-visible {
  filter: brightness(1.1);
}

.cta-bag-icon {
  width: 18px;
  height: 18px;
  overflow: visible;
  color: currentColor;
}

/* ---------- Feature card (Vì sao chọn Phúc An) ---------- */
.feature-card {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-jade);
}

.feature-card__icon {
  width: 56px;
  height: 56px;
  margin-inline: auto;
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  transition: background-color var(--transition-base), color var(--transition-base), transform var(--transition-base);
}

[data-theme='dark'] .feature-card__icon {
  color: var(--color-jade);
}

.feature-card:hover .feature-card__icon {
  background-color: var(--color-jade);
  color: var(--color-on-jade);
  transform: scale(1.1) rotate(-4deg);
}

.feature-card__icon svg {
  width: 26px;
  height: 26px;
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.feature-card p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ---------- Chat FAB (Messenger) ---------- */
.chat-fab {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 150;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.chat-fab svg {
  width: 30px;
  height: 30px;
}

.chat-fab:focus-visible {
  transform: translateY(-3px) scale(1.05);
  filter: brightness(0.94);
}

/* Hover chỉ cho thiết bị có chuột thật — tránh hiệu ứng "dính" hover khi chạm trên mobile */
@media (hover: hover) and (pointer: fine) {
  .chat-fab:hover {
    transform: translateY(-3px) scale(1.05);
    filter: brightness(0.94);
  }

  [data-theme='dark'] .chat-fab:hover,
  [data-theme='dark'] .chat-fab:focus-visible {
    filter: brightness(1.1);
  }
}

@media (min-width: 768px) {
  .chat-fab {
    right: 28px;
    bottom: 28px;
  }
}

/* ---------- Account toggle button (dùng chung style theme-toggle) ---------- */
/* Hiện ở MỌI khổ màn hình (kể cả mobile) — trên mobile đây là icon thay chỗ cho
   nút "Đặt hàng" cũ ngay cạnh logo, để khách (đặc biệt lớn tuổi) bấm vào điền
   thông tin 1 lần dùng lâu dài. Xem responsive.css để biết chỗ ẩn header__order-btn. */
.account-toggle {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  flex-shrink: 0;
}

.account-toggle svg {
  width: 19px;
  height: 19px;
}

.account-toggle:hover,
.account-toggle:focus-visible {
  border-color: var(--color-gold);
  background-color: var(--color-bg-soft);
}

/* ---------- Pill / badge ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

[data-theme='dark'] .pill {
  color: var(--color-gold);
}