/* ==========================================================
   Fashion AI Engine — Shared Components
   Requires: variables.css loaded first.
   Used by: both public (app.css) and admin (admin.css) layouts.
   ========================================================== */


/* ----------------------------------------------------------
   BASE RESET
   ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent-dark);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover { text-decoration: underline; }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  line-height: 1.25;
}

p { margin: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }


/* ----------------------------------------------------------
   LAYOUT
   ---------------------------------------------------------- */
.app-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

.section {
  padding: var(--space-3xl) 0;
}

.section-header {
  margin-bottom: var(--space-2xl);
}

.section-eyebrow {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.section-description {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 540px;
  font-weight: 300;
}


/* ----------------------------------------------------------
   BUTTONS
   ---------------------------------------------------------- */
.btn-ai {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1;
  padding: 0.6875rem 1.375rem;
  border-radius: var(--radius-pill);
  border: 1.5px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-base),
              color var(--transition-base),
              border-color var(--transition-base),
              transform var(--transition-fast),
              box-shadow var(--transition-base);
  white-space: nowrap;
  user-select: none;
}

.btn-ai:hover { text-decoration: none; transform: translateY(-1px); }
.btn-ai:active { transform: translateY(0); }

.btn-ai-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(201, 169, 110, 0.35);
}
.btn-ai-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
  box-shadow: 0 4px 16px rgba(201, 169, 110, 0.40);
}

.btn-ai-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-soft);
}
.btn-ai-secondary:hover {
  background: var(--color-bg-alt);
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

.btn-ai-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}
.btn-ai-ghost:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-ai-dark {
  background: var(--color-cta);
  color: #fff;
  border-color: var(--color-cta);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.20);
}
.btn-ai-dark:hover {
  background: var(--color-cta-hover);
  border-color: var(--color-cta-hover);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

/* Admin-specific button variant */
.btn-ai-admin {
  background: var(--admin-accent);
  color: #fff;
  border-color: var(--admin-accent);
}
.btn-ai-admin:hover {
  background: var(--admin-accent-hover);
  border-color: var(--admin-accent-hover);
  color: #fff;
}


/* ----------------------------------------------------------
   CARDS
   ---------------------------------------------------------- */
.ai-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-soft);
}

.ai-card-hover {
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.ai-card-hover:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.ai-surface {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
}

.glass-card {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}


/* ----------------------------------------------------------
   BADGES
   ---------------------------------------------------------- */
.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.6875rem;
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius-pill);
  padding: 0.25rem 0.625rem;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.ai-badge-hot {
  background: rgba(224, 82, 82, 0.10);
  color: #B91C1C;
  border: 1px solid rgba(224, 82, 82, 0.20);
}

.ai-badge-soft {
  background: var(--color-accent-subtle);
  color: var(--color-accent-dark);
  border: 1px solid rgba(201, 169, 110, 0.25);
}

.ai-badge-premium {
  background: rgba(99, 102, 241, 0.10);
  color: #3730A3;
  border: 1px solid rgba(99, 102, 241, 0.20);
}

.ai-badge-muted {
  background: rgba(0, 0, 0, 0.06);
  color: var(--color-text-secondary);
  border: 1px solid rgba(0, 0, 0, 0.08);
}

/* Admin badge variants (use admin token colors) */
.ai-badge-ok {
  background: var(--admin-success-subtle);
  color: #065F46;
  border: 1px solid rgba(16, 185, 129, 0.20);
}

.ai-badge-warn {
  background: var(--admin-warning-subtle);
  color: #92400E;
  border: 1px solid rgba(245, 158, 11, 0.20);
}

.ai-badge-info {
  background: var(--admin-accent-subtle);
  color: #3730A3;
  border: 1px solid rgba(99, 102, 241, 0.20);
}


/* ----------------------------------------------------------
   FRONTEND — Collection Card
   ---------------------------------------------------------- */
.collection-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.collection-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}

.collection-card-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--color-bg-alt);
}

.collection-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.collection-card:hover .collection-card-media img {
  transform: scale(1.04);
}

.collection-card-body {
  padding: var(--space-md) var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.collection-card-title {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
}

.collection-card-count {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}


/* ----------------------------------------------------------
   FRONTEND — Product Card
   ---------------------------------------------------------- */
.product-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}

.product-card-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--color-bg-alt);
}

.product-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card-media img {
  transform: scale(1.04);
}

.product-card-media-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.18) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.product-card:hover .product-card-media-overlay {
  opacity: 1;
}

.product-card-body {
  padding: var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.product-card-title {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-price {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.product-price-original {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-decoration: line-through;
  margin-left: var(--space-xs);
}

.product-source {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.trend-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-pill);
  background: rgba(201, 169, 110, 0.90);
  color: #fff;
  backdrop-filter: blur(4px);
  letter-spacing: 0.03em;
}


/* ----------------------------------------------------------
   ADMIN — Shell layout
   ---------------------------------------------------------- */
.admin-shell {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: var(--admin-sidebar-width);
  background: var(--admin-sidebar-bg);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: var(--z-sticky);
  border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.admin-sidebar__brand {
  padding: var(--space-lg) var(--space-md) var(--space-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.admin-sidebar__logo {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
  line-height: 1.3;
}

.admin-sidebar__logo-sub {
  display: block;
  font-size: 0.6875rem;
  font-weight: 400;
  color: var(--admin-sidebar-muted);
  margin-top: 2px;
  letter-spacing: 0.03em;
}

.admin-sidebar__nav {
  padding: var(--space-md) var(--space-sm);
  flex: 1;
}

.admin-sidebar__section {
  margin-bottom: var(--space-lg);
}

.admin-sidebar__section-label {
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--admin-sidebar-muted);
  padding: 0 var(--space-sm);
  margin-bottom: var(--space-xs);
}

/* Canonical nav link for admin sidebar */
.admin-nav-link {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.4375rem var(--space-sm);
  border-radius: var(--radius-md);
  color: rgba(228, 228, 231, 0.80);
  font-size: 0.8125rem;
  font-weight: 400;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  cursor: pointer;
}

.admin-nav-link:hover {
  background: var(--admin-sidebar-hover);
  color: var(--admin-sidebar-text);
  text-decoration: none;
}

.admin-nav-link--active {
  background: rgba(99, 102, 241, 0.20);
  color: #A5B4FC;
  font-weight: 500;
}

.admin-nav-link__icon {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  opacity: 0.7;
}

.admin-nav-link--active .admin-nav-link__icon { opacity: 1; }

.admin-sidebar__footer {
  padding: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  font-size: 0.6875rem;
  color: var(--admin-sidebar-muted);
}

.admin-main {
  margin-left: var(--admin-sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.admin-topbar {
  height: var(--topbar-height);
  background: var(--admin-surface);
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  gap: var(--space-md);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.admin-topbar__title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--admin-text);
  margin: 0;
  line-height: 1;
}

.admin-topbar__spacer { flex: 1; }

.admin-topbar__action {
  font-size: 0.75rem;
  color: var(--admin-text-muted);
  transition: color var(--transition-fast);
}

.admin-topbar__action:hover {
  color: var(--admin-text);
  text-decoration: none;
}

.admin-content {
  padding: var(--space-xl) var(--space-lg);
  flex: 1;
}


/* ----------------------------------------------------------
   ADMIN — Cards
   ---------------------------------------------------------- */

/* General-purpose admin card (ai-card variant for admin) */
.admin-card {
  background: var(--admin-surface);
  border: 1px solid var(--admin-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-soft);
}

/* KPI card — single metric with icon */
.admin-kpi-card {
  background: var(--admin-surface);
  border: 1px solid var(--admin-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  box-shadow: var(--shadow-soft);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  transition: box-shadow var(--transition-base);
}

.admin-kpi-card:hover {
  box-shadow: var(--shadow-card);
}

.admin-kpi-card__icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}

.admin-kpi-card__icon--green  { background: var(--admin-success-subtle); }
.admin-kpi-card__icon--blue   { background: var(--admin-accent-subtle); }
.admin-kpi-card__icon--amber  { background: var(--admin-warning-subtle); }
.admin-kpi-card__icon--purple { background: rgba(139, 92, 246, 0.10); }

.admin-kpi-card__body { flex: 1; min-width: 0; }

.admin-kpi-card__label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--admin-text-muted);
  margin: 0 0 var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.admin-kpi-card__value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--admin-text);
  margin: 0 0 var(--space-xs);
}

/* Phase / info notice */
.admin-phase-notice {
  background: var(--admin-accent-subtle);
  border: 1px solid rgba(99, 102, 241, 0.20);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  font-size: 0.8125rem;
  color: #3730A3;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  line-height: 1.5;
}


/* ----------------------------------------------------------
   FORMS
   ---------------------------------------------------------- */
.ai-form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.ai-form-control {
  display: block;
  width: 100%;
  padding: 0.5625rem var(--space-md);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
}

.ai-form-control:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.ai-form-control::placeholder { color: var(--color-text-muted); }

.ai-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%239C9590' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-right: 2.5rem;
  cursor: pointer;
}


/* ----------------------------------------------------------
   UTILITIES
   ---------------------------------------------------------- */
.text-muted-soft {
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}

.soft-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-xl) 0;
}

.empty-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  color: var(--color-text-muted);
}

.empty-state__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  opacity: 0.4;
}

.empty-state__title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.empty-state__description {
  font-size: 0.875rem;
}

/* Responsive grids */
.responsive-grid {
  display: grid;
  gap: var(--space-md);
}

.responsive-grid-2 {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.responsive-grid-3 {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.responsive-grid-4 {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

/* Responsive sidebar hide on mobile */
@media (max-width: 768px) {
  .admin-sidebar {
    display: none;
  }

  .admin-main {
    margin-left: 0;
  }

  .responsive-grid-3,
  .responsive-grid-4 {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
}