/* ═══════════════════════════════════════════════════════════════
   SCHOOLMATE — Admin & Shared Design System
   Newsreader · Geist · Geist Mono  |  Wine · Cream · Gold
═══════════════════════════════════════════════════════════════ */

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Design tokens ──────────────────────────────────────────── */
:root {
  /* Tenant-overridable brand colours */
  --primary:       #5C1A2B;
  --primary-dark:  #43121F;
  --primary-mid:   #7A2A3C;
  --primary-light: #B86070;
  --primary-pale:  #F3DDE1;

  /* Structural palette */
  --cream:         #F5EDE0;
  --cream-warm:    #EFE4D2;
  --cream-deep:    #E6D8BF;
  --cream-mid:     #E6D8BF; /* compat alias */
  --cream-dark:    #EFE4D2; /* compat alias */
  --gold:          #C9A961;
  --gold-deep:     #A8893F;
  --gold-light:    #E2C98A;
  --ink:           #2A0F18;
  --ink-mid:       #4A2030;
  --ink-light:     #7A5060;
  --white:         #FFFFFF;
  --rule:          rgba(92,26,43,.12);

  /* Semantic */
  --danger:   #C0392B;
  --success:  #1A6B38;
  --warning:  #A8720D;

  /* Typography */
  --serif: "Newsreader", "Georgia", serif;
  --sans:  "Geist", "Inter", system-ui, -apple-system, sans-serif;
  --mono:  "Geist Mono", "Courier New", ui-monospace, monospace;

  /* Layout */
  --sidebar-w: 260px;
  --topbar-h:  60px;
  --radius:    6px;
  --radius-sm: 4px;
  --shadow:    0 2px 20px rgba(43,15,24,.08);
  --shadow-lg: 0 8px 40px rgba(43,15,24,.14);
  --transition: 0.18s ease;
}

/* ── Base ───────────────────────────────────────────────────── */
html { font-size: 15px; scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; display: block; }
svg {
  width: 18px; height: 18px;
  fill: none; stroke: currentColor;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  flex-shrink: 0;
}
button { cursor: pointer; font-family: var(--sans); }

/* ══════════════════════════════════════════════════════════════
   ADMIN LAYOUT
══════════════════════════════════════════════════════════════ */

.layout-admin {
  display: flex;
  min-height: 100vh;
  background: var(--cream);
  position: relative;
}

/* Paper grain — same texture as the landing page, applied to admin too */
.layout-admin::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  opacity: .35;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.16  0 0 0 0 0.06  0 0 0 0 0.10  0 0 0 .04 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  z-index: 0;
}
.layout-admin > * { position: relative; z-index: 1; }

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--primary-dark);
  display: flex; flex-direction: column;
  position: fixed; top: 0; left: 0;
  height: 100vh; z-index: 100;
  transition: transform var(--transition);
  overflow-y: auto; scrollbar-width: none;
  border-right: 1px solid rgba(201,169,97,.10);
}
.sidebar::-webkit-scrollbar { display: none; }

/* Gold rule accent across the very top of the sidebar */
.sidebar::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold), var(--gold-deep));
}

.sidebar-brand {
  display: flex; align-items: center; gap: 12px;
  padding: 24px 18px 18px;
  border-bottom: 1px solid rgba(201,169,97,.10);
}
.sidebar-logo {
  width: 38px; height: 38px; border-radius: 4px; object-fit: cover;
  border: 1px solid rgba(201,169,97,.25);
}
.sidebar-logo-text {
  width: 38px; height: 38px; flex-shrink: 0; border-radius: 4px;
  background: radial-gradient(circle at 35% 35%, var(--gold-light), var(--gold) 55%, var(--gold-deep));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 20px; font-weight: 500;
  color: var(--primary-dark);
  box-shadow: 0 0 0 1px var(--gold-deep);
}
.sidebar-brand-name { overflow: hidden; }
.brand-main {
  display: block;
  font-family: var(--serif); font-size: 15px; font-weight: 500; font-style: italic;
  color: var(--cream); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  letter-spacing: .01em;
}
.brand-sub {
  display: block;
  font-family: var(--mono); font-size: 9.5px; letter-spacing: .20em;
  text-transform: uppercase; color: var(--gold-light); opacity: .65;
  margin-top: 2px;
}

/* Nav section label */
.nav-label {
  font-family: var(--mono); font-size: 9px; letter-spacing: .26em;
  text-transform: uppercase; color: rgba(201,169,97,.4);
  padding: 16px 14px 6px; display: block;
}

.sidebar-nav {
  flex: 1; padding: 10px 8px;
  display: flex; flex-direction: column; gap: 1px;
}

.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; border-radius: var(--radius-sm);
  color: rgba(245,237,224,.58);
  font-size: 13.5px; font-weight: 400;
  transition: all var(--transition);
  position: relative;
}
.nav-item svg { opacity: .55; width: 16px; height: 16px; flex-shrink: 0; }
.nav-item:hover {
  background: rgba(201,169,97,.10);
  color: rgba(245,237,224,.92);
}
.nav-item:hover svg { opacity: .85; }
.nav-item.active {
  background: rgba(201,169,97,.14);
  color: var(--gold-light); font-weight: 500;
}
.nav-item.active svg { opacity: 1; stroke: var(--gold); }
.nav-item.active::before {
  content: "";
  position: absolute; left: 0; top: 20%; bottom: 20%;
  width: 2px; border-radius: 2px;
  background: var(--gold);
}

.sidebar-footer {
  padding: 12px 10px;
  border-top: 1px solid rgba(201,169,97,.10);
  display: flex; align-items: center; gap: 8px;
}
.user-chip { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0; }
.user-avatar {
  width: 32px; height: 32px; flex-shrink: 0;
  background: var(--primary-mid);
  border: 1px solid rgba(201,169,97,.22);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 13px; font-weight: 500; color: var(--cream);
}
.user-info { min-width: 0; }
.user-name {
  display: block; font-size: 13px; font-weight: 500; color: var(--cream);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.user-email {
  display: block; font-family: var(--mono); font-size: 10px; letter-spacing: .06em;
  color: rgba(245,237,224,.40);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.logout-btn {
  color: rgba(245,237,224,.35); padding: 6px; border-radius: 4px;
  transition: all var(--transition); background: none; border: none;
}
.logout-btn:hover { color: var(--cream); background: rgba(192,57,43,.3); }
.logout-btn svg { width: 15px; height: 15px; }

/* Sidebar backdrop (mobile) */
.sidebar-backdrop {
  display: none; position: fixed; inset: 0;
  background: rgba(27,8,15,.55); z-index: 99;
}

/* ── Main Content ─────────────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1; display: flex; flex-direction: column; min-height: 100vh;
}

/* ── Topbar ───────────────────────────────────────────────── */
.topbar {
  height: var(--topbar-h);
  background: rgba(245,237,224,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
  display: flex; align-items: center; gap: 16px;
  padding: 0 28px;
  position: sticky; top: 0; z-index: 50;
}
.menu-toggle {
  display: none; background: none; border: none; color: var(--ink); padding: 4px;
}
.menu-toggle svg { width: 20px; height: 20px; }
.page-title {
  font-family: var(--serif);
  font-size: 19px; font-weight: 400;
  font-style: italic;
  color: var(--ink); flex: 1;
  letter-spacing: -.01em;
}
.topbar-right { display: flex; align-items: center; gap: 12px; }
.view-site-btn {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--primary);
  border: 1px solid rgba(92,26,43,.22);
  padding: 6px 14px; border-radius: 20px;
  transition: all var(--transition);
}
.view-site-btn:hover { background: var(--primary); color: var(--cream); }

.content-area { padding: 28px; flex: 1; }

/* ══════════════════════════════════════════════════════════════
   BUTTONS
══════════════════════════════════════════════════════════════ */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 20px;
  font-family: var(--sans); font-size: 13px; font-weight: 500;
  letter-spacing: .01em;
  border: 1px solid transparent; border-radius: var(--radius-sm);
  cursor: pointer; text-decoration: none; white-space: nowrap;
  position: relative; overflow: hidden;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform .15s;
}
/* Shimmer sweep on hover */
.btn::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,.22) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform .65s ease;
  pointer-events: none;
}
.btn:hover::before { transform: translateX(120%); }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn svg { width: 15px; height: 15px; }

.btn-primary { background: var(--primary); color: var(--cream); border-color: var(--primary-dark); }
.btn-primary:hover { background: var(--primary-dark); color: var(--cream); }

.btn-secondary { background: var(--cream-warm); color: var(--ink); border-color: var(--rule); }
.btn-secondary:hover { background: var(--cream-deep); }

.btn-gold { background: var(--gold); color: var(--primary-dark); border-color: var(--gold-deep); font-weight: 600; }
.btn-gold:hover { background: var(--gold-deep); color: var(--cream); }

.btn-danger { background: var(--danger); color: #fff; border-color: #a93226; }
.btn-danger:hover { background: #a93226; }

.btn-outline { background: transparent; border: 1px solid rgba(92,26,43,.28); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--cream); border-color: var(--primary); }

.btn-sm   { padding: 6px 14px; font-size: 12px; }
.btn-full { width: 100%; justify-content: center; }

/* Loading state */
.btn.loading { opacity: .7; pointer-events: none; }
.btn.loading::after {
  content: ""; width: 13px; height: 13px; border-radius: 50%;
  border: 2px solid currentColor; border-top-color: transparent;
  animation: btn-spin .7s linear infinite; margin-left: 4px;
}
@keyframes btn-spin { to { transform: rotate(360deg); } }

/* ══════════════════════════════════════════════════════════════
   CARDS
══════════════════════════════════════════════════════════════ */
.card {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px; padding-bottom: 16px;
  border-bottom: 1px solid var(--rule);
}
.card-title {
  font-family: var(--serif); font-size: 17px; font-weight: 500;
  color: var(--ink); letter-spacing: -.01em;
}

/* Stat cards */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr));
  gap: 16px; margin-bottom: 28px;
}
.stat-card {
  background: var(--white);
  border: 1px solid var(--rule); border-radius: var(--radius);
  padding: 22px 24px; position: relative; overflow: hidden;
}
/* Gold top rule on stat cards */
.stat-card::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--primary);
  transform-origin: left; transform: scaleX(.3);
  transition: transform .4s ease;
}
.stat-card.gold::after   { background: var(--gold); }
.stat-card.success::after { background: var(--success); }
a.stat-card {
  text-decoration: none;
  transition: box-shadow .2s, transform .2s, border-color .2s;
}
a.stat-card:hover {
  border-color: rgba(92,26,43,.22);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
a.stat-card:hover::after { transform: scaleX(1); }
.stat-value {
  font-family: var(--serif); font-size: 36px; font-weight: 500;
  color: var(--primary); line-height: 1;
  letter-spacing: -.02em;
}
.stat-label {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--ink-light); margin-top: 10px;
}

/* ══════════════════════════════════════════════════════════════
   TABLES
══════════════════════════════════════════════════════════════ */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--rule); border-radius: var(--radius);
}
table { width: 100%; border-collapse: collapse; background: var(--white); font-size: 13.5px; }
thead {
  background: var(--cream);
  border-bottom: 2px solid var(--rule);
}
th {
  padding: 11px 16px; text-align: left;
  font-family: var(--mono); font-size: 10px; font-weight: 500;
  letter-spacing: .22em; text-transform: uppercase; color: var(--ink-light);
  white-space: nowrap;
}
td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink-mid); vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(245,237,224,.5); }

/* ══════════════════════════════════════════════════════════════
   FORMS
══════════════════════════════════════════════════════════════ */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .18em;
  text-transform: uppercase; font-weight: 500; color: var(--ink-mid);
  display: flex; justify-content: space-between; align-items: center;
}
.label-link {
  font-family: var(--sans); font-weight: 400; font-size: 12px;
  color: var(--primary); letter-spacing: 0; text-transform: none;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 10px 14px;
  border: 1px solid rgba(92,26,43,.18);
  border-radius: var(--radius-sm);
  font-size: 14px; font-family: var(--sans);
  color: var(--ink); background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-pale);
}
.form-group textarea { resize: vertical; min-height: 96px; }
.form-group input[type="file"] { padding: 8px; background: var(--cream); }
.form-group input[type="color"] {
  padding: 4px; height: 40px; cursor: pointer; border-radius: var(--radius-sm);
}

.form-input-sm {
  width: 100%; padding: 5px 8px;
  border: 1px solid rgba(92,26,43,.16); border-radius: var(--radius-sm);
  font-size: 13px; background: var(--white);
}
.form-input-sm:focus { outline: none; border-color: var(--primary); }

.form-check { display: flex; align-items: center; gap: 8px; }
.form-check input[type="checkbox"] { width: 15px; height: 15px; accent-color: var(--primary); }

.form-section { margin-bottom: 28px; }
.form-section-title {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .22em;
  text-transform: uppercase; font-weight: 500;
  color: var(--primary); margin-bottom: 16px; padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}

.input-pw-wrap { position: relative; }
.input-pw-wrap input { padding-right: 56px; }
.pw-toggle {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  background: none; border: none; font-size: 11px; color: var(--ink-light); padding: 4px;
}

/* ══════════════════════════════════════════════════════════════
   ALERTS & BADGES
══════════════════════════════════════════════════════════════ */
.alert {
  padding: 12px 16px; border-radius: var(--radius-sm);
  font-size: 13.5px; margin-bottom: 20px;
  display: flex; align-items: flex-start; gap: 8px;
  border-left: 3px solid currentColor;
}
.alert-success { background: #e6f4ed; color: var(--success); border-color: var(--success); }
.alert-error   { background: #fdf0ee; color: var(--danger);  border-color: var(--danger); }
.alert-warning { background: #fef9e6; color: var(--warning); border-color: var(--warning); }
.alert-info    { background: var(--primary-pale); color: var(--primary-dark); border-color: var(--primary); }

.badge {
  display: inline-flex; align-items: center;
  padding: 3px 9px; border-radius: 20px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .12em;
  font-weight: 500; text-transform: uppercase; white-space: nowrap;
}
.badge-success { background: #e6f4ed; color: var(--success); }
.badge-danger  { background: #fdf0ee; color: var(--danger); }
.badge-warning { background: #fef9e6; color: var(--warning); }
.badge-neutral { background: var(--cream-deep); color: var(--ink-light); }
.badge-primary { background: var(--primary-pale); color: var(--primary); }
.badge-gold    { background: #faf0d8; color: #7a6018; }

/* ══════════════════════════════════════════════════════════════
   PAGINATION / FILTER / PAGE HEADER
══════════════════════════════════════════════════════════════ */
.pagination { display: flex; gap: 5px; align-items: center; margin-top: 20px; }
.pagination a, .pagination span {
  padding: 7px 13px;
  border: 1px solid var(--rule); border-radius: var(--radius-sm);
  font-size: 13px; color: var(--ink-mid); background: var(--white);
  transition: all var(--transition);
}
.pagination a:hover { background: var(--cream); border-color: var(--primary); color: var(--primary); }
.pagination .active { background: var(--primary); color: var(--cream); border-color: var(--primary); }

.filter-bar {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end;
  background: var(--white); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: 16px 20px; margin-bottom: 20px;
}
.filter-bar .form-group { min-width: 160px; flex: 1; }

.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px; flex-wrap: wrap; gap: 12px;
}
.page-header-title {
  font-family: var(--serif); font-size: 24px; font-weight: 400;
  font-style: italic; color: var(--ink); letter-spacing: -.02em;
}
.page-header-sub {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink-light); margin-top: 4px;
}

/* ══════════════════════════════════════════════════════════════
   AUTH LAYOUT
══════════════════════════════════════════════════════════════ */
.auth-body {
  background: var(--primary-dark);
  background-image:
    radial-gradient(900px 700px at 75% -10%, rgba(201,169,97,.14), transparent 55%),
    radial-gradient(700px 600px at -5% 90%, rgba(92,26,43,.38), transparent 55%);
  min-height: 100vh; display: flex; align-items: center;
  justify-content: center; padding: 24px;
  position: relative; overflow: hidden;
}
.auth-body::before {
  content: "";
  position: fixed; inset: 0; pointer-events: none; opacity: .4;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.16  0 0 0 0 0.06  0 0 0 0 0.10  0 0 0 .04 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}
.auth-wrap { width: 100%; max-width: 420px; position: relative; z-index: 1; }
.auth-brand { text-align: center; margin-bottom: 28px; }
.auth-logo { width: 64px; height: 64px; border-radius: 8px; object-fit: cover; margin: 0 auto 12px; }
.auth-logo-icon {
  width: 64px; height: 64px;
  background: radial-gradient(circle at 35% 35%, var(--gold-light), var(--gold) 55%, var(--gold-deep));
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 30px; font-weight: 500;
  color: var(--primary-dark); margin: 0 auto 14px;
  box-shadow: 0 0 0 1px var(--gold-deep), 0 8px 24px rgba(0,0,0,.3);
}
.auth-school-name {
  font-family: var(--serif); font-size: 22px; font-weight: 400;
  font-style: italic; color: var(--cream); letter-spacing: -.01em;
}
.auth-tagline {
  font-family: var(--mono); font-size: 10px; letter-spacing: .22em;
  text-transform: uppercase; color: rgba(245,237,224,.45); margin-top: 6px;
}
.auth-card {
  background: var(--white); border-radius: var(--radius);
  padding: 32px; box-shadow: var(--shadow-lg);
  border-top: 2px solid var(--gold);
}
.auth-title {
  font-family: var(--serif); font-size: 21px; font-weight: 400;
  font-style: italic; color: var(--ink); margin-bottom: 4px; letter-spacing: -.01em;
}
.auth-sub {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-light); margin-bottom: 24px;
}
.auth-form { display: flex; flex-direction: column; gap: 16px; }
.auth-divider {
  text-align: center; font-size: 13px; color: var(--ink-light);
  margin: 20px 0 14px; position: relative;
}
.auth-divider::before {
  content: ''; position: absolute; top: 50%; left: 0; right: 0;
  height: 1px; background: var(--rule);
}
.auth-divider span { position: relative; background: var(--white); padding: 0 10px; }
.auth-links { display: flex; gap: 12px; justify-content: center; font-size: 13px; flex-wrap: wrap; }
.auth-footer {
  text-align: center; margin-top: 20px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .14em;
  text-transform: uppercase; color: rgba(245,237,224,.4);
}
.auth-footer a { color: var(--gold-light); }

/* ══════════════════════════════════════════════════════════════
   MISC COMPONENTS
══════════════════════════════════════════════════════════════ */

/* Upload zone */
.upload-zone {
  border: 1.5px dashed rgba(92,26,43,.22);
  border-radius: var(--radius); padding: 32px;
  text-align: center; cursor: pointer;
  transition: all var(--transition); background: var(--cream);
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--primary); background: var(--primary-pale);
}
.upload-zone-icon { font-size: 36px; margin-bottom: 8px; }
.upload-zone p { font-size: 14px; color: var(--ink-light); }
.upload-zone strong { color: var(--primary); }
.upload-zone input[type="file"] { display: none; }

/* Tabs */
.tabs {
  display: flex; gap: 0;
  border-bottom: 1px solid var(--rule); margin-bottom: 24px; overflow-x: auto;
}
.tab-btn {
  padding: 10px 20px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em; text-transform: uppercase;
  font-weight: 500; color: var(--ink-light);
  background: none; border: none;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: all var(--transition); white-space: nowrap;
}
.tab-btn.active, .tab-btn:hover { color: var(--primary); border-bottom-color: var(--primary); }

/* Empty state */
.empty-state { text-align: center; padding: 60px 24px; }
.empty-state-icon { font-size: 44px; margin-bottom: 16px; opacity: .3; }
.empty-state h3 {
  font-family: var(--serif); font-size: 18px; font-weight: 400;
  font-style: italic; color: var(--ink); margin-bottom: 8px;
}
.empty-state p { font-size: 13.5px; color: var(--ink-light); margin-bottom: 20px; }

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop.open { display: block; }
  .main-content { margin-left: 0; }
  .menu-toggle { display: flex; }
  .content-area { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .page-header { flex-direction: column; align-items: flex-start; gap: 10px; }
  .page-header > div { width: 100%; }
  .topbar { padding: 0 16px; }
  .card form[style*="grid-template-columns:1fr 280px"],
  .card form[style*="grid-template-columns: 1fr 280px"],
  div[style*="grid-template-columns:1fr 340px"],
  div[style*="grid-template-columns: 1fr 340px"] {
    display: flex !important; flex-direction: column !important;
  }
  .table-wrap { -webkit-overflow-scrolling: touch; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .topbar-right { display: none; }
  .page-title { font-size: 17px; }
}