/* ==========================================================================
   Yash Engineering — Storefront Design System
   Clean SaaS style: neutral surface, single accent, generous whitespace.
   ========================================================================== */

:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-faint: #94a3b8;

  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-primary-text: #1e40af;

  --color-success: #16a34a;
  --color-success-bg: #f0fdf4;
  --color-success-border: #bbf7d0;
  --color-danger: #dc2626;
  --color-danger-bg: #fef2f2;
  --color-danger-border: #fecaca;
  --color-warning: #d97706;
  --color-warning-bg: #fffbeb;
  --color-warning-border: #fde68a;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 999px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, .08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, .12);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1160px;
}

* { box-sizing: border-box; }

html { -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-sans);
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-size: 15px;
  line-height: 1.55;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }

h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: 28px; font-weight: 700; }
h2 { font-size: 20px; font-weight: 700; }
h3 { font-size: 15px; font-weight: 600; }

/* ---------- Header ---------- */
header.site {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  font-weight: 800;
  font-size: 18px;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -.02em;
}

.brand .brand-mark {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  flex-shrink: 0;
}

.topbar nav { display: flex; gap: 4px; flex: 1; }
.topbar nav a {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 14px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}
.topbar nav a:hover { color: var(--color-text); background: var(--color-bg); }

.topbar .right { display: flex; gap: 4px; align-items: center; }
.topbar .right a, .topbar .right button {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 14px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.topbar .right a:hover { color: var(--color-text); background: var(--color-bg); }
.topbar .right a.cta { color: #fff; background: var(--color-primary); }
.topbar .right a.cta:hover { background: var(--color-primary-hover); }

.icon { width: 18px; height: 18px; flex-shrink: 0; }

/* ---------- Language switcher ---------- */
.lang-switcher { display: flex; align-items: center; gap: 2px; margin-right: 4px; }
.lang-switcher a {
  font-size: 12.5px; font-weight: 600; color: var(--color-text-muted);
  padding: 6px 9px; border-radius: var(--radius-sm);
}
.lang-switcher a:hover { background: var(--color-bg); color: var(--color-text); }
.lang-switcher a.active { background: var(--color-primary-light); color: var(--color-primary-text); }
.lang-switcher-drawer { flex-wrap: wrap; margin: 4px 6px 0; }

/* ---------- Mobile menu toggle + drawer ---------- */
.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  padding: 8px;
  margin: 0;
  min-width: 0;
  color: var(--color-text);
  cursor: pointer;
  border-radius: var(--radius-sm);
}
.menu-toggle:hover { background: var(--color-bg); }

.mobile-drawer-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, .5);
  z-index: 40;
  opacity: 0;
  transition: opacity .2s ease;
}
.mobile-drawer-overlay.open { display: block; opacity: 1; }

.mobile-drawer {
  position: fixed; top: 0; bottom: 0; left: 0;
  width: 82%; max-width: 320px;
  background: var(--color-surface);
  z-index: 41;
  display: flex; flex-direction: column;
  padding: 8px 20px 20px;
  transform: translateX(-100%);
  transition: transform .25s ease;
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
}
.mobile-drawer.open { transform: translateX(0); }

.mobile-drawer-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0; margin-bottom: 8px; border-bottom: 1px solid var(--color-border);
}
.mobile-drawer-header .brand { font-size: 16px; }
.drawer-close {
  background: transparent; border: none; font-size: 24px; line-height: 1; color: var(--color-text-muted);
  padding: 4px 8px; min-width: 0; cursor: pointer;
}

.mobile-drawer a {
  display: flex; align-items: center; gap: 8px;
  color: var(--color-text); font-weight: 500; font-size: 15px;
  padding: 12px 6px; border-radius: var(--radius-sm);
}
.mobile-drawer a:hover { background: var(--color-bg); color: var(--color-text); }
.mobile-drawer a.cta { color: #fff; background: var(--color-primary); justify-content: center; }
.mobile-drawer hr { border: none; border-top: 1px solid var(--color-border); margin: 10px 0; }
.mobile-drawer form { margin-top: 6px; }

/* ---------- Mobile bottom nav ---------- */
.mobile-bottom-nav {
  display: none;
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  z-index: 30;
  padding: 6px 0;
  box-shadow: 0 -2px 12px rgba(15, 23, 42, .06);
}
.mobile-bottom-nav a {
  flex: 1;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  color: var(--color-text-muted); font-size: 11px; font-weight: 600;
  padding: 6px 4px;
}
.mobile-bottom-nav a.active { color: var(--color-primary); }
.mobile-bottom-nav .icon { width: 20px; height: 20px; }

.cart-badge {
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-full);
  min-width: 17px;
  height: 17px;
  padding: 0 4px;
  font-size: 11px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 2px;
}

/* ---------- Layout ---------- */
main { max-width: var(--max-width); margin: 0 auto; padding: 32px 24px 72px; min-height: 60vh; }

.flash {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
}
.flash.error { background: var(--color-danger-bg); color: var(--color-danger); border-color: var(--color-danger-border); }
.flash.success { background: var(--color-success-bg); color: var(--color-success); border-color: var(--color-success-border); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #1e3a8a 0%, var(--color-primary) 100%);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  color: #fff;
  margin-bottom: 40px;
}
.hero h1 { font-size: 32px; color: #fff; margin-bottom: 8px; }
.hero p { color: #dbeafe; font-size: 15px; max-width: 460px; margin: 0; }

/* ---------- Banner slider ---------- */
.banner-slider {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  margin-bottom: 40px; aspect-ratio: 3 / 1; background: #0f172a;
}
.banner-slide {
  position: absolute; inset: 0; opacity: 0; visibility: hidden;
  transition: opacity .6s ease;
}
.banner-slide.active { opacity: 1; visibility: visible; }
.banner-slide img { width: 100%; height: 100%; object-fit: cover; display: block; }
.banner-slide a.banner-link { display: block; width: 100%; height: 100%; }
.banner-caption {
  position: absolute; left: 0; bottom: 0; width: 100%; padding: 28px 36px 22px;
  background: linear-gradient(to top, rgba(0,0,0,.65), transparent); color: #fff; pointer-events: none;
}
.banner-caption h2 { color: #fff; font-size: 24px; margin-bottom: 2px; }
.banner-caption p { margin: 0; color: #e2e8f0; font-size: 14px; }
.banner-dots { position: absolute; bottom: 16px; right: 24px; display: flex; gap: 6px; z-index: 2; }
.banner-dots button {
  width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,.45); border: none; padding: 0; min-width: 0;
}
.banner-dots button.active { background: #fff; }
.banner-dots button:hover { background: #fff; }

/* ---------- Flash sale strip ---------- */
.flash-sale-strip {
  background: linear-gradient(120deg, #7f1d1d, #dc2626 60%, #ea580c);
  border-radius: var(--radius-lg); padding: 22px 32px; color: #fff;
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  margin-bottom: 32px;
}
.flash-sale-strip .info h2 { color: #fff; display: flex; align-items: center; gap: 8px; }
.flash-sale-strip .info p { margin: 4px 0 0; color: #fecaca; font-size: 13px; }
.countdown { display: flex; gap: 8px; }
.countdown .unit { background: rgba(255,255,255,.16); border-radius: 8px; padding: 8px 12px; text-align: center; min-width: 54px; }
.countdown .unit .num { font-size: 20px; font-weight: 800; display: block; line-height: 1; }
.countdown .unit .lbl { font-size: 9px; text-transform: uppercase; letter-spacing: .04em; opacity: .85; }

/* ---------- Section headings ---------- */
.section-heading { display: flex; align-items: baseline; justify-content: space-between; margin: 40px 0 16px; }
.section-heading h2 { margin: 0; }
.section-heading a { font-size: 13px; font-weight: 600; }

/* ---------- Grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 18px; }
.grid.categories { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }

/* ---------- Card ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: box-shadow .15s, transform .15s, border-color .15s;
}
.category-card:hover { box-shadow: var(--shadow-md); border-color: var(--color-border-strong); transform: translateY(-1px); }
.category-card .cat-icon {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: var(--color-primary-light); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.category-card h3 { margin: 0 0 2px; }
.category-card .muted { margin: 0; font-size: 12px; }

/* ---------- Product card ---------- */
.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow .15s, transform .15s, border-color .15s;
}
.product-card:hover { box-shadow: var(--shadow-md); border-color: var(--color-border-strong); transform: translateY(-2px); }
.product-card .thumb {
  aspect-ratio: 1.3 / 1;
  background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-faint);
  position: relative;
}
.product-card .thumb .icon { width: 34px; height: 34px; }
.flash-ribbon {
  position: absolute; top: 10px; left: -6px;
  background: #dc2626; color: #fff; font-size: 10px; font-weight: 800; letter-spacing: .03em;
  padding: 3px 10px; box-shadow: var(--shadow-sm);
}
.badge.flash { background: #fef2f2; color: #dc2626; border-color: #fecaca; }
.product-card .body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.product-card h3 { margin: 0; font-size: 14px; }
.product-card .sku { font-size: 11px; color: var(--color-text-faint); text-transform: uppercase; letter-spacing: .04em; }
.product-card .price-row { display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap; margin-top: 2px; }
.product-card .stock-out { color: var(--color-danger); font-size: 12px; font-weight: 600; }

.price { font-weight: 700; font-size: 17px; color: var(--color-text); }
.mrp { color: var(--color-text-faint); text-decoration: line-through; font-size: 13px; font-weight: 500; }

.thumb-strip { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.thumb-btn {
  width: 64px; height: 64px; padding: 0; min-width: 0; border-radius: var(--radius-sm); overflow: hidden;
  background: var(--color-surface); border: 2px solid var(--color-border); cursor: pointer; flex-shrink: 0;
}
.thumb-btn img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb-btn.active { border-color: var(--color-primary); }
.thumb-btn:hover { border-color: var(--color-primary); }

.badge {
  display: inline-flex; align-items: center;
  background: var(--color-warning-bg); color: var(--color-warning);
  border: 1px solid var(--color-warning-border);
  padding: 2px 8px; border-radius: var(--radius-full);
  font-size: 11px; font-weight: 700;
}
.badge.pending { background: var(--color-warning-bg); color: var(--color-warning); border-color: var(--color-warning-border); }
.badge.approved, .badge.active { background: var(--color-success-bg); color: var(--color-success); border-color: var(--color-success-border); }
.badge.rejected, .badge.inactive { background: var(--color-danger-bg); color: var(--color-danger); border-color: var(--color-danger-border); }

/* ---------- Buttons ---------- */
button, .btn {
  font-family: inherit; font-size: 14px; font-weight: 600;
  background: var(--color-primary); color: #fff; border: 1px solid var(--color-primary);
  padding: 10px 18px; border-radius: var(--radius-sm);
  cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  transition: background .15s, box-shadow .15s, transform .05s;
}
button:hover, .btn:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); text-decoration: none; }
button:active, .btn:active { transform: translateY(1px); }
button:disabled { opacity: .5; cursor: not-allowed; }
.btn-outline { background: var(--color-surface); color: var(--color-primary); border-color: var(--color-border-strong); }
.btn-outline:hover { background: var(--color-primary-light); border-color: var(--color-primary); color: var(--color-primary); }
.btn-danger { background: var(--color-surface); color: var(--color-danger); border-color: var(--color-danger-border); }
.btn-danger:hover { background: var(--color-danger-bg); border-color: var(--color-danger); color: var(--color-danger); }
.btn-block { width: 100%; }
form.inline { display: inline; }

/* ---------- Forms ---------- */
input, select, textarea {
  font-family: inherit; font-size: 14px;
  padding: 10px 12px; border: 1px solid var(--color-border-strong); border-radius: var(--radius-sm);
  background: var(--color-surface); color: var(--color-text);
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}
.field { margin-bottom: 16px; display: flex; flex-direction: column; gap: 6px; max-width: 420px; }
.field label { font-size: 13px; font-weight: 600; color: var(--color-text); }

.auth-shell { display: flex; justify-content: center; padding: 40px 0; }
.auth-card {
  width: 100%; max-width: 400px; background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 36px 32px; box-shadow: var(--shadow-sm);
}
.auth-card h1 { text-align: center; margin-bottom: 4px; }
.auth-card .subtitle { text-align: center; color: var(--color-text-muted); font-size: 13px; margin-bottom: 24px; }
.auth-card .footer-link { text-align: center; margin-top: 16px; font-size: 13px; color: var(--color-text-muted); }

.auth-tabs { display: flex; gap: 4px; background: var(--color-bg); border-radius: var(--radius-md); padding: 4px; margin-bottom: 24px; }
.auth-tabs .tab-btn {
  flex: 1; background: transparent; color: var(--color-text-muted); border: none;
  padding: 8px 6px; border-radius: var(--radius-sm); font-size: 12.5px; font-weight: 600; cursor: pointer;
}
.auth-tabs .tab-btn.active { background: var(--color-surface); color: var(--color-text); box-shadow: var(--shadow-sm); }
.auth-tabs .tab-btn:hover:not(.active) { color: var(--color-text); }
.otp-status { min-height: 18px; margin: 10px 0 0; font-size: 13px; }
.otp-status.error { color: var(--color-danger); }
.otp-status.success { color: var(--color-success); }

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; background: var(--color-surface); }
th, td { padding: 12px 14px; border-bottom: 1px solid var(--color-border); text-align: left; font-size: 14px; }
th { font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--color-text-faint); font-weight: 700; background: #fafbfc; }
tbody tr:hover { background: #fafbfc; }
.table-wrap { border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; }
.table-wrap table { border: none; }

.muted { color: var(--color-text-muted); font-size: 13px; }

/* ---------- Empty state ---------- */
.empty-state {
  text-align: center; padding: 64px 24px; color: var(--color-text-muted);
  background: var(--color-surface); border: 1px dashed var(--color-border-strong); border-radius: var(--radius-lg);
}
.empty-state .icon { width: 40px; height: 40px; color: var(--color-text-faint); margin-bottom: 12px; }
.empty-state p { margin: 0 0 16px; }

/* ---------- Summary box (cart / order totals) ---------- */
.summary-box { max-width: 340px; margin-left: auto; }
.summary-box .row { display: flex; justify-content: space-between; padding: 6px 0; font-size: 14px; }
.summary-box .row.total { border-top: 1px solid var(--color-border); margin-top: 6px; padding-top: 12px; font-weight: 700; font-size: 16px; }

/* ---------- CMS content (pages, blog posts) ---------- */
.content-body { line-height: 1.75; }
.content-body h2 { font-size: 22px; margin: 1.4em 0 .5em; }
.content-body h3 { font-size: 17px; margin: 1.2em 0 .5em; }
.content-body p { margin: 0 0 1em; }
.content-body ul, .content-body ol { margin: 0 0 1em; padding-left: 24px; }
.content-body li { margin-bottom: .4em; }
.content-body img { max-width: 100%; border-radius: var(--radius-md); margin: 1em 0; }
.content-body a { text-decoration: underline; }
.content-body blockquote { border-left: 3px solid var(--color-primary); margin: 1em 0; padding: .2em 0 .2em 16px; color: var(--color-text-muted); }

/* ---------- Footer ---------- */
footer.site { border-top: 1px solid var(--color-border); padding: 32px 24px; margin-top: 48px; color: var(--color-text-faint); font-size: 13px; text-align: center; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 16px; margin-bottom: 14px; }
.footer-links a { color: var(--color-text-muted); font-weight: 500; font-size: 13px; }
.footer-links a:hover { color: var(--color-primary); }

/* ---------- Android app banner (mobile only) ---------- */
.app-banner {
  display: none; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--color-primary); color: #fff; padding: 10px 16px;
}
.app-banner-info { display: flex; align-items: center; gap: 12px; min-width: 0; }
.app-banner-icon {
  width: 36px; height: 36px; border-radius: var(--radius-sm); background: rgba(255,255,255,.16);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.app-banner-icon .icon { color: #fff; width: 20px; height: 20px; }
.app-banner-text { min-width: 0; }
.app-banner-text strong { display: block; font-size: 13px; line-height: 1.3; }
.app-banner-text span { display: block; color: rgba(255,255,255,.82); font-size: 11.5px; line-height: 1.3; }
.app-banner-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.app-banner-actions .btn { background: #fff; color: var(--color-primary); border-color: #fff; padding: 6px 14px; font-size: 12.5px; }
.app-banner-actions .btn:hover { background: rgba(255,255,255,.9); }
.app-banner-actions button {
  background: transparent; border: none; color: #fff; font-size: 20px; line-height: 1;
  padding: 2px 4px; cursor: pointer; opacity: .85;
}
.app-banner-actions button:hover { opacity: 1; }

@media (max-width: 640px) {
  body { padding-bottom: 60px; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .topbar { gap: 10px; padding: 12px 16px; }
  .topbar nav { display: none; }
  .topbar .right { gap: 0; }
  .topbar .right .desktop-only-link { display: none; }
  .topbar .right .cart-link .link-text { display: none; }
  .mobile-bottom-nav { display: flex; }
  .app-banner { display: flex; }
  .hero { padding: 32px 24px; }
  .hero h1 { font-size: 24px; }
}