/* ============================================================================
 * Sinh Vũ · Site Header v1.0
 * Header chung cho mọi public page (homepage, dịch vụ, gói, case, lien-he).
 * Cấu trúc 2 luồng rõ rệt: Khám phá (catalog) + Bắt đầu (3 cửa intake).
 * ============================================================================ */

.svh {
  position: sticky;
  top: 0;
  z-index: var(--sv-z-sticky, 100);
  background: color-mix(in srgb, var(--cua2-bg-paper, #FAF7F2) 92%, transparent);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--cua2-border-hair, #ECE7DD);
  font-family: var(--sv-f-label);
}

.svh-inner {
  max-width: 1280px;
  margin-inline: auto;
  padding: 16px clamp(16px, 4vw, 32px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 80px;
}

/* ── Brand ──────────────────────────────────────────── */
.svh-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.svh-brand-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.svh-brand-text {
  font-family: var(--sv-f-label);
  font-weight: var(--sv-fw-semibold);
  font-size: 15px;
  color: var(--cua2-text-ink, #2C2A24);
  line-height: 1.1;
}

.svh-brand-eyebrow {
  font-family: var(--sv-f-label);
  font-size: 10px;
  font-weight: var(--sv-fw-semibold);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sv-color-accent-default);
  line-height: 1.2;
  margin-top: 2px;
}

/* ── Nav ────────────────────────────────────────────── */
.svh-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: nowrap;
}

.svh-nav-item {
  position: relative;
}

.svh-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 0;
  font-family: var(--sv-font-heading);
  font-weight: 500;
  font-size: 14px;
  color: var(--cua2-text-secondary, #5A574E);
  background: transparent;
  border: 0;
  border-bottom: 1.5px solid transparent;
  border-radius: 0;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  min-height: 44px;
  transition: color 180ms, border-color 180ms;
}

.svh-nav-btn:hover,
.svh-nav-btn[aria-expanded="true"] {
  background: transparent;
  color: var(--cua2-text-ink, #2C2A24);
  border-bottom-color: var(--sv-color-accent-default);
}

.svh-nav-btn[data-active="true"] {
  color: var(--cua2-text-ink, #2C2A24);
  border-bottom-color: var(--sv-color-accent-default);
}

.svh-chevron {
  width: 12px;
  height: 12px;
  transition: transform var(--sv-d-fast);
}

.svh-nav-btn[aria-expanded="true"] .svh-chevron {
  transform: rotate(180deg);
}

/* ── Primary CTA ────────────────────────────────────── */
.svh-cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  border-radius: 999px;
  background: var(--sv-color-accent-default);
  color: white;
  font-family: var(--sv-font-heading);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  min-height: 44px;
  transition: background 180ms, transform 180ms;
}

.svh-cta-primary:hover {
  background: var(--sv-color-accent-hover);
  transform: translateY(-1px);
  color: white;
}

/* ── Mega Panel ─────────────────────────────────────── */
.svh-mega {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  background: white;
  border: 1px solid var(--cua2-border-hair, #ECE7DD);
  border-radius: var(--sv-r-xl);
  box-shadow: var(--sv-shadow-xl);
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--sv-d-fast), transform var(--sv-d-fast);
  z-index: 999;
}

.svh-nav-item.open .svh-mega {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* ── Mega: Khám phá ─────────────────────────────────── */
.svh-mega-explore {
  width: min(720px, 90vw);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 28px;
}

.svh-mega-col {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.svh-mega-col-title {
  font-family: var(--sv-f-label);
  font-size: 10px;
  font-weight: var(--sv-fw-bold);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cua2-text-ink, #2C2A24);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--cua2-border-hair, #ECE7DD);
}

.svh-mega-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--sv-r-sm);
  text-decoration: none;
  color: var(--cua2-text-ink, #2C2A24);
  transition: background var(--sv-d-fast), color var(--sv-d-fast);
}

.svh-mega-link:hover {
  background: color-mix(in srgb, var(--sv-color-cream-tint, #FFEAAE) 14%, transparent);
  color: var(--cua2-text-ink, #2C2A24);
}

.svh-mega-code {
  font-family: var(--sv-f-mono);
  font-size: 11px;
  color: var(--sv-color-accent-default);
  font-weight: var(--sv-fw-semibold);
  flex-shrink: 0;
  width: 26px;
}

.svh-mega-name {
  font-family: var(--sv-f-body);
  font-size: 13.5px;
  font-weight: var(--sv-fw-medium);
}

.svh-mega-meta {
  font-family: var(--sv-f-mono);
  font-size: 11px;
  color: var(--cua2-text-ink, #2C2A24);
  margin-left: auto;
  white-space: nowrap;
}

.svh-mega-package {
  display: flex;
  flex-direction: column;
  padding: 10px 12px;
  border-radius: var(--sv-r-md);
  text-decoration: none;
  color: var(--cua2-text-ink, #2C2A24);
  background: var(--sv-paper-sunk);
  margin-bottom: 6px;
  transition: background var(--sv-d-fast);
}

.svh-mega-package:hover {
  background: color-mix(in srgb, var(--sv-color-cream-tint) 18%, var(--cua2-bg-paper));
  color: var(--cua2-text-ink);
}
.svh-mega-package:hover .svh-mega-pkg-price {
  color: var(--sv-color-accent-default);
}

.svh-mega-pkg-name {
  font-family: var(--sv-f-body);
  font-weight: var(--sv-fw-semibold);
  font-size: 13px;
}

.svh-mega-pkg-price {
  font-family: var(--sv-f-mono);
  font-size: 11px;
  color: var(--sv-color-accent-default);
  margin-top: 2px;
}

.svh-mega-case {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding: 12px;
  border-radius: var(--sv-r-md);
  background: linear-gradient(135deg, var(--cua2-text-ink, #2C2A24), var(--cua2-text-ink));
  color: white;
  text-decoration: none;
  transition: transform var(--sv-d-fast);
}

.svh-mega-case:hover {
  transform: translateY(-2px);
}

.svh-mega-case-icon {
  width: 32px;
  height: 32px;
  background: var(--sv-color-accent-default);
  border-radius: var(--sv-r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.svh-mega-case-text {
  display: flex;
  flex-direction: column;
}

.svh-mega-case-label {
  font-family: var(--sv-f-label);
  font-size: 9px;
  font-weight: var(--sv-fw-bold);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sv-color-cream-tint);
}

.svh-mega-case-name {
  font-family: var(--sv-f-body);
  font-weight: var(--sv-fw-semibold);
  font-size: 13.5px;
  margin-top: 2px;
}

/* ── Mega: Bắt đầu (3 cửa) ──────────────────────────── */
.svh-mega-start {
  width: min(720px, 90vw);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.svh-door {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  border-radius: var(--sv-r-lg);
  border: 1px solid var(--cua2-border-hair, #ECE7DD);
  text-decoration: none;
  color: var(--cua2-text-ink, #2C2A24);
  background: white;
  transition: all var(--sv-d-fast);
  position: relative;
  overflow: hidden;
}

.svh-door:hover {
  border-color: var(--sv-color-accent-default);
  background: color-mix(in srgb, var(--sv-color-cream-tint) 14%, var(--cua2-bg-raised));
  transform: translateY(-2px);
  box-shadow: 0 6px 16px color-mix(in srgb, var(--cua2-text-ink) 8%, transparent);
}
.svh-door:hover .svh-door-num,
.svh-door:hover .svh-door-name {
  color: var(--sv-color-text-accent);
}

.svh-door[data-featured="true"] {
  background: var(--cua2-text-ink);
  border-color: var(--cua2-text-ink);
  color: white;
}
.svh-door[data-featured="true"] .svh-door-num {
  color: var(--sv-color-accent-default);
}
.svh-door[data-featured="true"] .svh-door-name {
  color: white;
}
.svh-door[data-featured="true"] .svh-door-desc {
  color: color-mix(in srgb, white 75%, transparent);
}
.svh-door[data-featured="true"] .svh-door-meta {
  color: color-mix(in srgb, white 60%, transparent);
  border-top-color: color-mix(in srgb, white 18%, transparent);
}
.svh-door[data-featured="true"]:hover {
  background: var(--cua2-text-ink);
  border-color: var(--sv-color-accent-default);
  transform: translateY(-2px);
}
.svh-door[data-featured="true"]:hover .svh-door-num,
.svh-door[data-featured="true"]:hover .svh-door-name {
  color: white;
}

.svh-door-num {
  font-family: var(--sv-f-display);
  font-style: italic;
  font-weight: var(--sv-fw-extrabold);
  font-size: 28px;
  color: var(--sv-color-accent-default);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 4px;
}

.svh-door-name {
  font-family: var(--sv-f-display);
  font-weight: var(--sv-fw-bold);
  font-size: 16px;
  color: var(--cua2-text-ink, #2C2A24);
  letter-spacing: -0.015em;
  line-height: 1.2;
}

.svh-door-desc {
  font-family: var(--sv-f-body);
  font-size: 12px;
  line-height: 1.45;
  color: var(--cua2-text-secondary);
  flex: 1;
}

.svh-door-meta {
  font-family: var(--sv-f-mono);
  font-size: 10.5px;
  color: var(--cua2-text-ink, #2C2A24);
  padding-top: 8px;
  border-top: 1px dashed var(--cua2-border-hair, #ECE7DD);
}

/* ── Mobile burger ──────────────────────────────────── */
.svh-burger {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--cua2-border-hair, #ECE7DD);
  border-radius: var(--sv-r-md);
  cursor: pointer;
  color: var(--cua2-text-ink, #2C2A24);
}

.svh-burger svg {
  width: 18px;
  height: 18px;
}

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 820px) {
  .svh-nav,
  .svh-cta-primary {
    display: none;
  }
  .svh-burger {
    display: inline-flex;
  }
  .svh-brand-eyebrow {
    display: none;
  }
}

/* Mobile drawer (when .svh has .svh-open) — refactor 2026-06-15 v2 */
.svh-drawer {
  display: none;
}

.svh-open .svh-drawer {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--cua2-bg-paper, #FAF7F2);
  border-top: 1px solid var(--cua2-border-hair, #ECE7DD);
  border-bottom: 1px solid var(--cua2-border-hair, #ECE7DD);
  padding: clamp(16px, 4vw, 24px);
  max-height: calc(100dvh - 80px);
  overflow-y: auto;
  box-shadow: 0 12px 32px rgba(44, 42, 36, 0.12);
  animation: svhDrawerIn 240ms cubic-bezier(.16, 1, .3, 1) both;
}

@keyframes svhDrawerIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.svh-drawer-group {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--cua2-border-hair, #ECE7DD);
}
.svh-drawer-group:last-of-type {
  border-bottom: 0;
}

.svh-drawer-title {
  font-family: var(--sv-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sv-color-accent-default);
  margin-bottom: 12px;
}

.svh-drawer-link {
  display: block;
  padding: 12px 14px;
  border-radius: 8px;
  font-family: var(--sv-font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--cua2-text-ink, #2C2A24);
  text-decoration: none;
  margin-bottom: 4px;
  transition: background 150ms, color 150ms;
}

.svh-drawer-link:hover,
.svh-drawer-link:active {
  background: color-mix(in srgb, var(--sv-color-accent-default) 10%, transparent);
  color: var(--sv-color-accent-default);
}

.svh-drawer-cta {
  display: block;
  padding: 16px;
  background: var(--sv-color-accent-default);
  color: white;
  border-radius: 12px;
  text-align: center;
  font-family: var(--sv-font-mono);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.04em;
  text-decoration: none;
  margin-top: 8px;
  transition: background 150ms, transform 150ms;
}

.svh-drawer-cta:hover,
.svh-drawer-cta:active {
  background: var(--sv-color-accent-hover, var(--sv-color-accent-default));
  transform: translateY(-1px);
}

/* Burger icon morph khi drawer open (X icon) */
.svh-open .svh-burger {
  background: color-mix(in srgb, var(--sv-color-accent-default) 12%, transparent);
  border-color: var(--sv-color-accent-default);
  color: var(--sv-color-accent-default);
}