/* ============================================================
   Kit Locker — Stylesheet
   Apple-inspired minimal, elegant, modern
   ============================================================ */

/* ── Tokens ── */
:root {
  --bg:           #F5F5F7;
  --bg-card:      #FFFFFF;
  --bg-header:    rgba(245, 245, 247, 0.85);
  --bg-filter:    rgba(245, 245, 247, 0.92);
  --text-primary: #1D1D1F;
  --text-secondary:#6E6E73;
  --text-tertiary: #AEAEB2;
  --accent:       #0071E3;
  --accent-hover: #0077ED;
  --border:       rgba(0, 0, 0, 0.08);
  --border-strong:rgba(0, 0, 0, 0.15);
  --shadow-card:  0 2px 12px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 28px rgba(0,0,0,0.13);
  --radius-card:  14px;
  --radius-sm:    8px;
  --radius-pill:  999px;
  --font:         'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --header-h:     60px;
  --filter-h:     110px;
  --transition:   0.2s ease;
}

[data-theme="dark"] {
  --bg:           #000000;
  --bg-card:      #1C1C1E;
  --bg-header:    rgba(0, 0, 0, 0.85);
  --bg-filter:    rgba(28, 28, 30, 0.95);
  --text-primary: #F5F5F7;
  --text-secondary:#98989D;
  --text-tertiary: #636366;
  --accent:       #2997FF;
  --accent-hover: #409CFF;
  --border:       rgba(255,255,255,0.08);
  --border-strong:rgba(255,255,255,0.15);
  --shadow-card:  0 2px 12px rgba(0,0,0,0.4);
  --shadow-hover: 0 8px 28px rgba(0,0,0,0.6);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--bg-header);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  transition: background var(--transition);
}

.header-inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.brand-name {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--text-primary);
}

.brand-count {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 400;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover {
  background: var(--border);
}

.btn-clear {
  font-size: 13px;
  color: var(--accent);
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: background var(--transition);
}
.btn-clear:hover { background: var(--border); }

/* ── Theme Toggle ── */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: background var(--transition);
  border: 1px solid var(--border-strong);
}
.theme-toggle:hover { background: var(--border); }

/* ── Filter Bar ── */
.filter-bar {
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  background: var(--bg-filter);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 90;
  padding: 12px 0 10px;
  transition: background var(--transition);
}

.filter-inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.search-wrap {
  position: relative;
  max-width: 360px;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-tertiary);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 8px 14px 8px 38px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  outline: none;
  transition: all var(--transition);
}

.search-input::placeholder { color: var(--text-tertiary); }
.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
}

.filters-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.filter-select {
  padding: 6px 28px 6px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  outline: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236E6E73' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: all var(--transition);
  max-width: 180px;
}

.filter-select:focus { border-color: var(--accent); }

/* View Toggle */
.view-toggle {
  position: absolute;
  right: 24px;
  bottom: 10px;
  display: flex;
  gap: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 3px;
}

.view-btn {
  width: 30px;
  height: 30px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.view-btn svg { width: 16px; height: 16px; }
.view-btn:hover { color: var(--text-primary); }
.view-btn.active {
  background: var(--accent);
  color: #fff;
}

/* ── Main Content ── */
.main-content {
  max-width: 1600px;
  margin: 0 auto;
  padding: 24px 24px 60px;
  margin-top: calc(var(--header-h) + var(--filter-h));
}

/* ── Kit Grid ── */
.kits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.kit-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
}

.kit-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.kit-card-image {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg);
}

.kit-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.kit-card:hover .kit-card-image img {
  transform: scale(1.04);
}

.kit-no-image {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: 13px;
}

.kit-card-info {
  padding: 12px 14px 14px;
  flex: 1;
}

.kit-manufacturer {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.kit-subject {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.3;
}

.kit-qty {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

/* Sale Badge */
.badge-sale {
  position: absolute;
  top: 10px;
  right: 10px;
  background: #FF3B30;
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-sale-sm {
  background: #FF3B30;
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

/* ── Kit List / Table ── */
.kits-list {
  overflow-x: auto;
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
}

.kits-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.kits-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  background: var(--bg-card);
}

.kits-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  vertical-align: middle;
}

.kit-row {
  cursor: pointer;
  transition: background var(--transition);
}
.kit-row:hover td { background: var(--bg); }
.kit-row:last-child td { border-bottom: none; }

.td-subject { font-weight: 500; }

.table-thumb {
  width: 56px;
  height: 42px;
  object-fit: cover;
  border-radius: 6px;
  display: block;
}

.table-thumb-empty {
  width: 56px;
  height: 42px;
  border-radius: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
}

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 80px 24px;
}
.empty-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}
.empty-sub {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ── Footer ── */
.site-footer {
  text-align: center;
  padding: 32px 24px;
  font-size: 13px;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border);
}

/* ── Kit Detail Page ── */
.kit-detail {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 24px 80px;
  margin-top: calc(var(--header-h) + 24px);
}

.kit-detail-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 28px;
  transition: opacity var(--transition);
}
.kit-detail-back:hover { opacity: 0.7; }

.kit-detail-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
  margin-bottom: 40px;
}

.kit-detail-image {
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}

.kit-detail-image img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
}

.kit-detail-image .kit-no-image {
  height: 100%;
}

.kit-detail-meta h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: 6px;
}

.kit-detail-meta .kit-manufacturer {
  font-size: 13px;
  margin-bottom: 20px;
}

.kit-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.kit-meta-item label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 3px;
}

.kit-meta-item span {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
}

.kit-detail-section {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  padding: 24px;
  margin-bottom: 16px;
}

.kit-detail-section h2 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.kit-detail-section p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
}

.kit-detail-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

/* ── Forms ── */
.form-page {
  max-width: 680px;
  margin: 0 auto;
  padding: 32px 24px 80px;
  margin-top: calc(var(--header-h) + 24px);
}

.form-page h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 28px;
}

.form-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
}

textarea.form-control { resize: vertical; min-height: 100px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

/* ── Login Page ── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  padding: 40px;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow-hover);
  text-align: center;
}

.login-card h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 6px;
}

.login-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 28px;
}

.login-error {
  background: rgba(255,59,48,0.1);
  color: #FF3B30;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
  margin-bottom: 16px;
}

/* ── For Sale Page ── */
.page-hero {
  text-align: center;
  padding: 48px 24px 32px;
  margin-top: var(--header-h);
}

.page-hero h1 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.8px;
  margin-bottom: 8px;
}

.page-hero p {
  color: var(--text-secondary);
  font-size: 16px;
}

/* ── Utilities ── */
.hidden { display: none !important; }

@media (max-width: 768px) {
  .kit-detail-hero { grid-template-columns: 1fr; }
  .kit-meta-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .kits-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
  .filter-bar { position: relative; top: auto; }
  .main-content { margin-top: var(--header-h); }
  .view-toggle { position: relative; right: auto; bottom: auto; margin-top: 8px; }
}