/* ============================================================
   QIAN Lighting — Custom Ceiling LED Strip Lighting
   Design system: warm light theme + amber glow accent
   ============================================================ */
:root {
  --bg: #FAFAF7;
  --surface: #FFFFFF;
  --text: #1A2332;
  --muted: #5A6472;
  --border: #E8E6E0;
  --accent: #E8A33D;
  --accent-dark: #C77F1B;
  --accent-soft: #FDF3E3;
  --dark: #101828;
  --dark-2: #1A2332;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 6px 24px rgba(26, 35, 50, 0.08);
  --shadow-lg: 0 16px 48px rgba(26, 35, 50, 0.14);
  --glow: 0 0 24px rgba(232, 163, 61, 0.45);
  --maxw: 1180px;
  --font: "Segoe UI", "Helvetica Neue", "Noto Sans", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 15px; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 84px 0; }
.section-dark { background: var(--dark); color: #F5F2EA; }
.section-dark .muted { color: #B8BFC9; }

h2.section-title { font-size: 34px; font-weight: 700; letter-spacing: -0.5px; }
p.section-sub { color: var(--muted); margin-top: 10px; font-size: 17px; max-width: 640px; }
.section-dark h2.section-title { color: #fff; }
.section-head { margin-bottom: 44px; }
.section-head.center { text-align: center; }
.section-head.center p.section-sub { margin-left: auto; margin-right: auto; }
.kicker {
  display: inline-block; color: var(--accent-dark); font-weight: 700;
  text-transform: uppercase; letter-spacing: 2px; font-size: 13px; margin-bottom: 10px;
}
.section-dark .kicker { color: var(--accent); }
.muted { color: var(--muted); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  padding: 13px 28px; border-radius: 999px; font-size: 15px; font-weight: 600;
  border: none; transition: all .2s ease; white-space: nowrap;
}
.btn-primary { background: linear-gradient(135deg, #F0B453, var(--accent-dark)); color: #fff; box-shadow: 0 4px 14px rgba(232,163,61,.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--glow); }
.btn-outline { background: transparent; color: var(--text); border: 1.5px solid var(--text); }
.btn-outline:hover { background: var(--text); color: #fff; }
.btn-ghost-light { background: rgba(255,255,255,.12); color: #fff; border: 1.5px solid rgba(255,255,255,.5); }
.btn-ghost-light:hover { background: rgba(255,255,255,.25); }
.btn-sm { padding: 9px 18px; font-size: 14px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 28px; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: .5px; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, #F0B453, var(--accent-dark));
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--glow);
}
.logo-mark svg { width: 20px; height: 20px; }
.logo small { font-weight: 500; color: var(--muted); font-size: 12px; display: block; letter-spacing: 2px; }
.main-nav { display: flex; gap: 26px; margin-inline-start: 12px; flex: 1; }
.main-nav a { font-size: 15px; font-weight: 500; color: var(--muted); padding: 6px 0; border-bottom: 2px solid transparent; }
.main-nav a:hover, .main-nav a.active { color: var(--text); border-bottom-color: var(--accent); }
.header-actions { display: flex; align-items: center; gap: 12px; }

.lang-switch { position: relative; }
.lang-btn {
  display: flex; align-items: center; gap: 6px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 999px; padding: 8px 14px; font-size: 14px; font-weight: 600;
}
.lang-btn:hover { border-color: var(--accent); }
.lang-menu {
  position: absolute; top: calc(100% + 8px); inset-inline-end: 0; background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow-lg);
  min-width: 160px; padding: 6px; display: none; z-index: 200;
}
.lang-menu.open { display: block; }
.lang-menu button {
  display: flex; width: 100%; text-align: start; padding: 9px 12px; background: none;
  border: none; border-radius: 8px; font-size: 14px; gap: 10px; align-items: center;
}
.lang-menu button:hover { background: var(--accent-soft); }
.lang-menu button.active { background: var(--accent-soft); font-weight: 700; }

.nav-toggle { display: none; background: none; border: none; width: 40px; height: 40px; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 22px; height: 2px; background: var(--text); position: relative; content: ""; margin: 0 auto;
}
.nav-toggle span::before { top: -7px; } .nav-toggle span::after { top: 5px; }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 640px; display: flex; align-items: center; color: #fff; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(10,16,28,.82) 0%, rgba(10,16,28,.55) 45%, rgba(10,16,28,.25) 100%);
}
.hero-content { position: relative; z-index: 2; max-width: 640px; padding: 90px 0; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(232,163,61,.18);
  border: 1px solid rgba(232,163,61,.5); color: #FFD9A0; border-radius: 999px;
  padding: 7px 16px; font-size: 13.5px; font-weight: 600; margin-bottom: 22px;
}
.hero h1 { font-size: 52px; line-height: 1.15; font-weight: 800; letter-spacing: -1px; }
.hero h1 .hl { color: var(--accent); }
.hero p { margin-top: 18px; font-size: 18.5px; color: #D7DCE4; max-width: 540px; }
.hero-cta { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }

/* ---------- Trust bar ---------- */
.trust-bar { background: var(--dark-2); color: #E8EBF0; }
.trust-inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding: 22px 0; }
.trust-item { display: flex; align-items: center; gap: 12px; justify-content: center; font-size: 15px; font-weight: 600; }
.trust-item svg { width: 22px; height: 22px; color: var(--accent); flex-shrink: 0; }

/* ---------- Category cards ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cat-card {
  position: relative; border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 4/3;
  display: flex; align-items: flex-end; box-shadow: var(--shadow); transition: transform .25s ease;
}
.cat-card:hover { transform: translateY(-6px); }
.cat-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.cat-card:hover img { transform: scale(1.05); }
.cat-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(10,16,28,.85)); }
.cat-card-body { position: relative; z-index: 2; padding: 24px; color: #fff; }
.cat-card-body h3 { font-size: 22px; }
.cat-card-body p { font-size: 14px; opacity: .85; margin-top: 4px; }

/* ---------- Product cards ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.product-card {
  background: var(--surface); border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid var(--border);
  display: flex; flex-direction: column; transition: transform .25s ease, box-shadow .25s ease;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.product-card-img { aspect-ratio: 4/3; overflow: hidden; position: relative; }
.product-card-img img { width: 100%; height: 100%; object-fit: cover; }
.product-card-cat {
  position: absolute; top: 14px; inset-inline-start: 14px; background: rgba(16,24,40,.72);
  color: #fff; font-size: 12px; font-weight: 600; padding: 5px 12px; border-radius: 999px;
  backdrop-filter: blur(4px);
}
.product-card-body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.product-card-body h3 { font-size: 19px; }
.product-card-body p { font-size: 14px; color: var(--muted); margin-top: 8px; flex: 1; }
.product-card-actions { display: flex; gap: 10px; margin-top: 18px; }
.product-card-actions .btn { flex: 1; }
.filter-pills { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 34px; }
.pill {
  padding: 9px 20px; border-radius: 999px; border: 1.5px solid var(--border);
  background: var(--surface); font-size: 14px; font-weight: 600; color: var(--muted);
}
.pill.active { background: var(--dark); border-color: var(--dark); color: #fff; }

/* ---------- Process ---------- */
.process-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.process-step {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-lg); padding: 28px;
}
.step-num {
  width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #F0B453, var(--accent-dark)); color: #fff; font-weight: 800; font-size: 18px;
  margin-bottom: 18px;
}
.process-step h3 { font-size: 18px; color: #fff; }
.process-step p { font-size: 14.5px; color: #B8BFC9; margin-top: 8px; }

/* ---------- Cases ---------- */
.case-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.case-card { border-radius: var(--radius-lg); overflow: hidden; position: relative; aspect-ratio: 3/4; box-shadow: var(--shadow); }
.case-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.case-card:hover img { transform: scale(1.06); }
.case-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(10,16,28,.88)); }
.case-body { position: relative; z-index: 2; padding: 22px; color: #fff; align-self: flex-end; height: 100%; display: flex; flex-direction: column; justify-content: flex-end; }
.case-body .case-tag { font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.case-body h3 { font-size: 18px; margin-top: 6px; }
.case-body p { font-size: 13.5px; opacity: .85; margin-top: 4px; }

/* ---------- About split ---------- */
.about-split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-split img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.about-split p { color: var(--muted); margin-top: 14px; }
.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px; }
.value-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; }
.value-item .v-icon { width: 42px; height: 42px; border-radius: 12px; background: var(--accent-soft); display: flex; align-items: center; justify-content: center; color: var(--accent-dark); margin-bottom: 14px; }
.value-item .v-icon svg { width: 22px; height: 22px; }
.value-item h3 { font-size: 16.5px; }
.value-item p { font-size: 13.5px; color: var(--muted); margin-top: 6px; }

/* ---------- CTA band ---------- */
.cta-band { text-align: center; position: relative; overflow: hidden; }
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 120%, rgba(232,163,61,.28), transparent 60%);
}
.cta-band h2 { font-size: 36px; color: #fff; }
.cta-band p { color: #B8BFC9; margin-top: 12px; max-width: 560px; margin-inline: auto; }
.cta-band .btn { margin-top: 28px; position: relative; }

/* ---------- Forms ---------- */
.form-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 36px; box-shadow: var(--shadow); max-width: 760px; margin: 0 auto;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 14px; font-weight: 600; }
.form-group label .opt { color: var(--muted); font-weight: 400; font-size: 12.5px; }
.form-group input, .form-group select, .form-group textarea {
  border: 1.5px solid var(--border); border-radius: 10px; padding: 12px 14px; background: #FCFCFA;
  transition: border-color .2s; width: 100%;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--accent); }
.form-group textarea { min-height: 110px; resize: vertical; }
.field-error { color: #C0392B; font-size: 13px; display: none; }
.form-group.invalid input, .form-group.invalid select, .form-group.invalid textarea { border-color: #C0392B; }
.form-group.invalid .field-error { display: block; }
.form-submit { margin-top: 24px; display: flex; justify-content: center; }
.form-success {
  display: none; text-align: center; padding: 40px 20px;
}
.form-success .ok-icon { width: 64px; height: 64px; border-radius: 50%; background: #E8F6EC; color: #1E8E4E; display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; }
.form-success .ok-icon svg { width: 30px; height: 30px; }
.form-success h3 { font-size: 22px; }
.form-success p { color: var(--muted); margin-top: 8px; }
.form-msg { text-align: center; margin-top: 14px; font-size: 14px; color: #C0392B; display: none; }

/* ---------- Contact info ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.3fr; gap: 48px; align-items: start; }
.info-list { display: flex; flex-direction: column; gap: 20px; }
.info-item { display: flex; gap: 14px; align-items: flex-start; }
.info-item .i-icon { width: 42px; height: 42px; border-radius: 12px; background: var(--accent-soft); color: var(--accent-dark); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.info-item .i-icon svg { width: 20px; height: 20px; }
.info-item h4 { font-size: 15px; }
.info-item p { font-size: 14.5px; color: var(--muted); margin-top: 2px; }

/* ---------- Booking page ---------- */
.booking-layout { display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px; align-items: start; }
.booking-points { display: flex; flex-direction: column; gap: 18px; margin-top: 28px; }
.booking-point { display: flex; gap: 14px; }
.bp-check { width: 26px; height: 26px; border-radius: 50%; background: var(--accent-soft); color: var(--accent-dark); display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-weight: 800; font-size: 14px; }
.booking-point p { font-size: 15px; color: var(--muted); }
.booking-point p b { color: var(--text); }

/* ---------- Page hero (inner pages) ---------- */
.page-hero { background: var(--dark); color: #fff; padding: 72px 0; position: relative; overflow: hidden; }
.page-hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse at 15% 0%, rgba(232,163,61,.22), transparent 55%); }
.page-hero h1 { font-size: 42px; position: relative; letter-spacing: -0.5px; }
.page-hero p { position: relative; color: #B8BFC9; margin-top: 10px; max-width: 620px; font-size: 17px; }

/* ---------- Product detail ---------- */
.product-detail { display: grid; grid-template-columns: 1.05fr 1fr; gap: 52px; align-items: start; }
.pd-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.pd-cat { color: var(--accent-dark); font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px; font-size: 13px; }
.pd-title { font-size: 34px; margin-top: 8px; letter-spacing: -0.5px; }
.pd-desc { color: var(--muted); margin-top: 14px; font-size: 16.5px; }
.pd-features { margin-top: 22px; display: flex; flex-direction: column; gap: 10px; }
.pd-features li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; }
.pd-features li::before { content: "✓"; color: var(--accent-dark); font-weight: 800; }
.pd-actions { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.specs-table { width: 100%; border-collapse: collapse; margin-top: 26px; background: var(--surface); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); }
.specs-table td { padding: 13px 18px; border-bottom: 1px solid var(--border); font-size: 14.5px; }
.specs-table tr:last-child td { border-bottom: none; }
.specs-table td:first-child { font-weight: 600; width: 40%; color: var(--text); background: #FCFBF8; }
.specs-table td:last-child { color: var(--muted); }

/* ---------- Footer ---------- */
.site-footer { background: var(--dark); color: #AEB5C0; padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 40px; padding-bottom: 48px; }
.site-footer h4 { color: #fff; font-size: 15.5px; margin-bottom: 18px; }
.site-footer ul { display: flex; flex-direction: column; gap: 10px; }
.site-footer a:hover { color: var(--accent); }
.footer-logo { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 800; font-size: 20px; margin-bottom: 16px; }
.footer-desc { font-size: 14px; max-width: 300px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; font-size: 13.5px; text-align: center; }

/* ---------- Floating booking button ---------- */
.float-cta {
  position: fixed; bottom: 26px; inset-inline-end: 26px; z-index: 90;
  padding: 14px 24px; border-radius: 999px; box-shadow: var(--shadow-lg), var(--glow);
}

/* ---------- Admin ---------- */
.admin-body { background: #F2F4F7; }
.admin-topbar { background: var(--dark); color: #fff; padding: 14px 0; }
.admin-topbar .container { display: flex; align-items: center; justify-content: space-between; }
.admin-user { display: flex; align-items: center; gap: 14px; font-size: 14px; color: #C6CBD4; }
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; background: linear-gradient(160deg, #F2F4F7 0%, #E8EBF0 100%); }
.login-card { background: #fff; border-radius: 20px; padding: 44px; width: 100%; max-width: 420px; box-shadow: var(--shadow-lg); }
.login-card h1 { font-size: 24px; }
.login-card .sub { color: var(--muted); font-size: 14px; margin: 8px 0 26px; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin: 28px 0; }
.stat-card { background: #fff; border-radius: 16px; padding: 22px; border: 1px solid var(--border); }
.stat-card .num { font-size: 32px; font-weight: 800; }
.stat-card .lbl { color: var(--muted); font-size: 13.5px; margin-top: 2px; }
.stat-card.hl { background: linear-gradient(135deg, #FFF7EA, #FFF); border-color: #F0DDB8; }
.leads-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 16px; overflow: hidden; border: 1px solid var(--border); font-size: 14px; }
.leads-table th { text-align: start; padding: 13px 16px; background: #F7F8FA; font-size: 13px; color: var(--muted); font-weight: 600; white-space: nowrap; }
.leads-table td { padding: 13px 16px; border-top: 1px solid var(--border); vertical-align: top; }
.badge { display: inline-block; padding: 4px 11px; border-radius: 999px; font-size: 12.5px; font-weight: 600; }
.badge-new { background: #FDF3E3; color: #B26B00; }
.badge-contacted { background: #E8F0FE; color: #1A56C4; }
.badge-won { background: #E8F6EC; color: #1E8E4E; }
.badge-closed { background: #EEF0F3; color: #6B7280; }
.badge-booking { background: #F3E8FD; color: #7C3AED; }
.badge-inquiry { background: #E0F2F1; color: #00695C; }
.admin-toolbar { display: flex; gap: 12px; align-items: center; margin: 20px 0; flex-wrap: wrap; }
.admin-toolbar select { padding: 9px 14px; border-radius: 10px; border: 1.5px solid var(--border); background: #fff; }
.admin-toolbar .spacer { flex: 1; }
.modal-mask { position: fixed; inset: 0; background: rgba(16,24,40,.5); display: none; align-items: center; justify-content: center; z-index: 300; padding: 24px; }
.modal-mask.open { display: flex; }
.modal { background: #fff; border-radius: 18px; max-width: 640px; width: 100%; max-height: 86vh; overflow: auto; padding: 32px; }
.modal h3 { font-size: 20px; margin-bottom: 18px; }
.lead-detail-row { display: grid; grid-template-columns: 110px 1fr; gap: 10px; padding: 9px 0; border-bottom: 1px dashed var(--border); font-size: 14.5px; }
.lead-detail-row .k { color: var(--muted); }
.btn-danger { background: #FDECEA; color: #C0392B; }
.btn-danger:hover { background: #C0392B; color: #fff; }
.admin-note-area { margin-top: 16px; }

/* ---------- RTL ---------- */
[dir="rtl"] { letter-spacing: 0 !important; }
[dir="rtl"] .hero h1, [dir="rtl"] h2.section-title, [dir="rtl"] .page-hero h1 { letter-spacing: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .cat-grid, .process-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .main-nav {
    display: none; position: absolute; top: 72px; inset-inline: 0; background: #fff;
    flex-direction: column; gap: 0; padding: 12px 24px 20px; border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg); margin: 0;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-toggle { display: block; }
  .header-cta-desktop { display: none; }
  .hero h1 { font-size: 36px; }
  .hero { min-height: 540px; }
  .trust-inner { grid-template-columns: repeat(2, 1fr); }
  .cat-grid, .product-grid, .process-grid, .about-split, .contact-layout, .booking-layout, .product-detail { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  h2.section-title { font-size: 27px; }
  .footer-grid { grid-template-columns: 1fr; }
  .leads-table { display: block; overflow-x: auto; }
}

/* ===== Admin: tabs & product editor ===== */
.admin-tabs { display: flex; gap: 8px; margin: 18px auto 0; border-bottom: 1px solid var(--border); padding-bottom: 0; }
.tab-btn { appearance: none; border: none; background: none; font: inherit; font-weight: 600; font-size: 15px; color: var(--muted); padding: 10px 16px; cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tab-btn.active { color: var(--text); border-bottom-color: var(--accent); }
.lang-tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 18px 0 14px; }
.lang-tab { appearance: none; border: 1px solid var(--border); background: var(--surface); border-radius: 999px; font: inherit; font-size: 13px; padding: 5px 14px; cursor: pointer; color: var(--text); }
.lang-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }