/* KIDDHUB design system — plain, clean, Facebook-like blue & white. No fancy SaaS look. */

:root {
  --primary: #1877F2;
  --primary-dark: #1E3A5F;
  --primary-hover: #166FE0;
  --bg: #FFFFFF;
  --bg-light-blue: #EFF6FF;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --border: #D1D5DB;
  --border-strong: #C7CDD4;
  --success: #16A34A;
  --success-bg: #F0FDF4;
  --danger: #DC2626;
  --danger-bg: #FEF2F2;
  --warning: #B45309;
  --warning-bg: #FFFBEB;
  --radius: 8px;
  --header-h: 68px;
  --sidebar-w: 240px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

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

h1, h2, h3, h4 { color: var(--text); margin: 0 0 12px; font-weight: 700; }
h1 { font-size: 26px; }
h2 { font-size: 21px; }
h3 { font-size: 17px; }
p { margin: 0 0 12px; color: var(--text); }
.text-secondary { color: var(--text-secondary); }
.text-sm { font-size: 13px; }

img { max-width: 100%; display: block; }

/* ---------- Layout shell ---------- */

.site-header {
  height: var(--header-h);
  background: #fff;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 20px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  white-space: nowrap;
}

.logo:hover { text-decoration: none; }

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-title {
  font-weight: 800;
  font-size: 21px;
  background: linear-gradient(90deg, #8B5CF6, #3B82F6, #22C55E);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo-wordmark {
  height: 26px;
  width: auto;
  display: block;
}

.logo-tagline {
  font-weight: 500;
  font-size: 11px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.header-spacer { flex: 1; }

.hamburger {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 10px;
  cursor: pointer;
}

.app-shell {
  display: flex;
  min-height: calc(100vh - var(--header-h));
}

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: #fff;
  border-right: 1px solid var(--border);
  padding: 16px 0;
}

.sidebar a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--text);
  font-weight: 500;
  border-left: 3px solid transparent;
}

.sidebar a:hover { background: var(--bg-light-blue); text-decoration: none; }
.sidebar a.active { background: var(--bg-light-blue); border-left-color: var(--primary); color: var(--primary); font-weight: 600; }

.main-content {
  flex: 1;
  padding: 24px;
  min-width: 0;
}

.main-content.full { max-width: 1200px; margin: 0 auto; width: 100%; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  border: 1px solid var(--primary);
  border-radius: var(--radius);
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.2;
}

.btn:hover { background: var(--primary-hover); border-color: var(--primary-hover); text-decoration: none; color: #fff; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-secondary { background: #fff; color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { background: var(--bg-light-blue); color: var(--text); }

.btn-outline { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--bg-light-blue); color: var(--primary); }

.btn-danger { background: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: #C41E1E; border-color: #C41E1E; }

.btn-sm { padding: 6px 10px; font-size: 13px; }
.btn-block { width: 100%; }

/* ---------- Cards ---------- */

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

.card + .card { margin-top: 16px; }

.card-title {
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 4px;
}

.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.stat-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.stat-card .label { color: var(--text-secondary); font-size: 13px; margin-bottom: 6px; }
.stat-card .value { font-size: 22px; font-weight: 700; color: var(--primary-dark); }

/* ---------- Forms ---------- */

label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; }

input[type=text], input[type=email], input[type=password], input[type=number],
input[type=search], input[type=tel], input[type=date], select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
  font-family: inherit;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(24, 119, 242, 0.15);
}

.form-group { margin-bottom: 16px; }
.form-row { display: flex; gap: 12px; }
.form-row > * { flex: 1; }
.help-text { color: var(--text-secondary); font-size: 12px; margin-top: 4px; }

/* ---------- Alerts ---------- */

.alert {
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 16px;
  font-size: 14px;
  border: 1px solid var(--border);
}

.alert-success { background: var(--success-bg); border-color: #BBF7D0; color: #166534; }
.alert-error { background: var(--danger-bg); border-color: #FECACA; color: #991B1B; }
.alert-info { background: var(--bg-light-blue); border-color: #BFDBFE; color: var(--primary-dark); }
.alert-warning { background: var(--warning-bg); border-color: #FDE68A; color: var(--warning); }

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--bg-light-blue);
  color: var(--primary-dark);
}

.badge-success { background: var(--success-bg); color: #166534; border-color: #BBF7D0; }
.badge-warning { background: var(--warning-bg); color: var(--warning); border-color: #FDE68A; }
.badge-danger { background: var(--danger-bg); color: #991B1B; border-color: #FECACA; }
.badge-gray { background: #F3F4F6; color: var(--text-secondary); border-color: var(--border); }

/* ---------- Tables ---------- */

table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--text-secondary); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; background: var(--bg-light-blue); }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
.table-wrap table { border: none; }
.table-wrap th:first-child, .table-wrap td:first-child { padding-left: 16px; }

/* ---------- Product grid ---------- */

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.product-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  display: flex;
  flex-direction: column;
}

.product-card .cover {
  aspect-ratio: 3/2;
  background: var(--bg-light-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-card .cover img { width: 100%; height: 100%; object-fit: cover; }
.product-card .body { padding: 12px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.product-card .title { font-weight: 600; font-size: 14px; line-height: 1.3; }
.product-card .meta { font-size: 12px; color: var(--text-secondary); }
.product-card .price { font-weight: 700; color: var(--primary-dark); font-size: 15px; margin-top: auto; }

/* ---------- Filters bar ---------- */

.filters-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 18px;
}

.filters-bar > * { flex: 1; min-width: 140px; }

/* ---------- Public search bar (homepage + marketplace) ---------- */

.search-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 18px;
}

.search-bar > *:not(button) { flex: 1; min-width: 140px; }

.search-bar input,
.search-bar select {
  border-radius: 999px;
  padding: 11px 18px;
}

.search-bar button {
  flex-basis: 100%;
  width: 100%;
  border-radius: 999px;
  padding: 13px;
  font-size: 15px;
}

/* ---------- Pagination ---------- */

.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 20px; flex-wrap: wrap; }
.pagination a, .pagination span {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 12px;
  font-size: 13px;
  color: var(--text);
}
.pagination a:hover { background: var(--bg-light-blue); text-decoration: none; }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- Utility ---------- */

.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.mt-0 { margin-top: 0; }
.mt-16 { margin-top: 16px; }
.mb-16 { margin-bottom: 16px; }
.section-title { display: flex; align-items: center; justify-content: space-between; margin: 28px 0 14px; }

/* ---------- Mobile ---------- */

@media (max-width: 860px) {
  .hamburger { display: inline-flex; }
  .sidebar {
    position: fixed;
    left: 0;
    top: var(--header-h);
    bottom: 0;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    z-index: 40;
    box-shadow: 2px 0 8px rgba(0,0,0,0.08);
  }
  .sidebar.open { transform: translateX(0); }
  .main-content { padding: 16px; }
  .form-row { flex-direction: column; }
  .site-header .logo-tagline { display: none; }
}