/* TN37 Langowan — Mobile-First Design System based on DESIGN.md */
:root {
  --color-primary: #cc785c;
  --color-primary-active: #a9583e;
  --color-primary-disabled: #e6dfd8;
  --color-ink: #141413;
  --color-body: #3d3d3a;
  --color-body-strong: #252523;
  --color-muted: #6c6a64;
  --color-muted-soft: #8e8b82;
  --color-hairline: #e6dfd8;
  --color-hairline-soft: #ebe6df;
  --color-canvas: #faf9f5;
  --color-surface-soft: #f5f0e8;
  --color-surface-card: #efe9de;
  --color-surface-dark: #181715;
  --color-surface-dark-elevated: #252320;
  --color-on-primary: #ffffff;
  --color-on-dark: #faf9f5;
  --color-on-dark-soft: #a09d96;
  --color-accent-teal: #5db8a6;
  --color-accent-amber: #e8a55a;
  --color-success: #5db872;
  --color-warning: #d4a017;
  --color-error: #c64545;

  --font-display: 'Times New Roman', Georgia, serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --font-code: 'JetBrains Mono', 'Courier New', monospace;

  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-pill: 9999px;

  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 96px;

  --top-nav-h: 56px;
  --bottom-nav-h: 64px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

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

html {
  color-scheme: light only;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  color: var(--color-body);
  background-color: var(--color-canvas);
  padding-bottom: calc(var(--bottom-nav-h) + var(--safe-bottom));
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
}

body.menu-open { overflow: hidden; }

/* ─── Typography (mobile-first) ─── */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 400; color: var(--color-ink); }
h1 { font-size: 28px; line-height: 1.15; letter-spacing: -0.3px; }
h2 { font-size: 22px; line-height: 1.2; letter-spacing: -0.3px; }
h3 { font-size: 20px; line-height: 1.25; letter-spacing: -0.2px; }
h4 { font-size: 18px; line-height: 1.3; font-family: var(--font-body); font-weight: 500; letter-spacing: 0; }
p { margin-bottom: var(--space-md); }

a { color: var(--color-primary); text-decoration: none; transition: color 0.15s; }
a:hover, a:active { color: var(--color-primary-active); }

/* ─── Top Navigation ─── */
.top-nav {
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  height: var(--top-nav-h);
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  position: sticky;
  top: 0;
  z-index: 100;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.top-nav-inner {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--color-ink);
  text-decoration: none;
  font-weight: 400;
  letter-spacing: -0.5px;
}

.nav-brand span { color: var(--color-primary); }

/* ─── Hamburger Button ─── */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  border-radius: var(--rounded-md);
  z-index: 110;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── Nav Links (slide-in drawer on mobile) ─── */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 98;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}

.nav-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.nav-links {
  position: fixed;
  top: 0;
  right: -300px;
  width: 280px;
  height: 100vh;
  height: 100dvh;
  background: var(--color-canvas);
  list-style: none;
  display: flex;
  flex-direction: column;
  padding: calc(var(--top-nav-h) + var(--space-lg)) var(--space-lg) var(--space-lg);
  gap: var(--space-xxs);
  z-index: 99;
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-left: 1px solid var(--color-hairline);
  overflow-y: auto;
}

.nav-links.show { right: 0; }

.nav-links a, .nav-links span {
  display: block;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-body);
  padding: 12px 16px;
  border-radius: var(--rounded-md);
  transition: background 0.15s;
}

.nav-links a:hover, .nav-links a:active, .nav-links a.active {
  background: var(--color-surface-card);
  color: var(--color-ink);
}

.nav-links a.admin-link { color: var(--color-primary); }
.nav-links a.logout-link { color: var(--color-muted); }
.nav-user-mobile span {
  font-size: 14px;
  color: var(--color-muted);
  padding: 8px 16px;
  border-bottom: 1px solid var(--color-hairline);
  margin-bottom: var(--space-sm);
}
.nav-user-desktop { display: none; }

/* ─── Bottom Mobile Navigation ─── */
.bottom-nav {
  display: flex;
  justify-content: space-around;
  align-items: center;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-h);
  padding-bottom: var(--safe-bottom);
  background: var(--color-canvas);
  border-top: 1px solid var(--color-hairline);
  z-index: 100;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  min-width: 44px;
  min-height: 44px;
  padding: 8px 12px;
  color: var(--color-muted-soft);
  text-decoration: none;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.5px;
  border-radius: var(--rounded-md);
  transition: color 0.15s, background 0.15s;
}

.bottom-nav-item svg { width: 22px; height: 22px; }

.bottom-nav-item.active,
.bottom-nav-item:hover,
.bottom-nav-item:active {
  color: var(--color-primary);
  background: var(--color-surface-soft);
}

.bottom-nav-item.logout-link { color: var(--color-muted); }

/* ─── Page Header ─── */
.page-header {
  padding: var(--space-xl) var(--space-md) var(--space-md);
  max-width: 1200px;
  margin: 0 auto;
}

.page-header h1 { margin-bottom: var(--space-xs); }

.page-header p {
  color: var(--color-muted);
  font-size: 15px;
  max-width: 640px;
}

/* ─── Container ─── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md) var(--space-xl);
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  padding: 12px 20px;
  min-height: 44px;
  height: auto;
  border-radius: var(--rounded-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, transform 0.1s;
  gap: var(--space-xs);
  -webkit-user-select: none;
  user-select: none;
  touch-action: manipulation;
}

.btn:active { transform: scale(0.97); }

.btn-primary { background: var(--color-primary); color: var(--color-on-primary); }
.btn-primary:hover, .btn-primary:active { background: var(--color-primary-active); color: var(--color-on-primary); }

.btn-secondary {
  background: var(--color-canvas);
  color: var(--color-ink);
  border: 1px solid var(--color-hairline);
}
.btn-secondary:hover, .btn-secondary:active { background: var(--color-surface-card); color: var(--color-ink); }

.btn-danger { background: var(--color-error); color: var(--color-on-primary); }
.btn-danger:hover, .btn-danger:active { background: #a83838; color: var(--color-on-primary); }

.btn-sm { padding: 8px 14px; min-height: 36px; font-size: 13px; }
.btn-block { width: 100%; }

/* ─── Cards ─── */
.card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
}

.card-featured { background: var(--color-surface-card); border: none; }

.card-dark {
  background: var(--color-surface-dark);
  color: var(--color-on-dark);
  border: none;
}

.card-dark h3, .card-dark h4 { color: var(--color-on-dark); }
.card-dark p { color: var(--color-on-dark-soft); }

/* ─── Forms ─── */
.form-group { margin-bottom: var(--space-md); }

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-body-strong);
  margin-bottom: var(--space-xxs);
}

.form-input {
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-ink);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-md);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance: none;
}

.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(204, 120, 92, 0.15);
}

.form-input::placeholder { color: var(--color-muted-soft); }
textarea.form-input { height: auto; min-height: 120px; resize: vertical; }

select.form-input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236c6a64' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

/* ─── Flash Messages ─── */
.flash {
  padding: var(--space-md);
  border-radius: var(--rounded-md);
  margin-bottom: var(--space-md);
  font-size: 14px;
  font-weight: 500;
}

.flash-success { background: #eaf5ec; color: #2d6a36; border: 1px solid #c3e6cb; }
.flash-error { background: #fdeaea; color: #9b2c2c; border: 1px solid #f5c6cb; }

/* ─── Search ─── */
.search-section {
  background: var(--color-surface-card);
  border-radius: var(--rounded-lg);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
}

.search-input-row {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-end;
}

.search-input-row .form-input { flex: 1; }

.adv-active {
  background: var(--color-primary) !important;
  color: var(--color-on-primary) !important;
  border-color: var(--color-primary) !important;
}

.adv-active svg { stroke: var(--color-on-primary); }

.advanced-panel {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  width: 100%;
  padding-top: var(--space-md);
  margin-top: var(--space-sm);
  border-top: 1px solid var(--color-hairline);
}

.advanced-panel .form-group { margin-bottom: 0; }

.search-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.search-form .form-group { margin-bottom: 0; }
.search-form .form-input { min-width: 0; }

/* ─── Tables (scrollable on mobile) ─── */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  margin: 0 calc(-1 * var(--space-md));
  border-radius: 0;
  border-left: none;
  border-right: none;
}

table { width: 100%; border-collapse: collapse; min-width: 700px; }

thead { background: var(--color-surface-card); position: sticky; top: 0; }

th {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-muted);
  white-space: nowrap;
}

td {
  padding: var(--space-sm) var(--space-md);
  font-size: 14px;
  color: var(--color-body-strong);
  border-top: 1px solid var(--color-hairline-soft);
  white-space: nowrap;
}

tr:active td { background: var(--color-surface-soft); }

/* ─── Pagination ─── */
.pagination {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin-top: var(--space-lg);
}

.pagination a, .pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-sm);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--rounded-md);
  border: 1px solid var(--color-hairline);
  color: var(--color-body);
  text-decoration: none;
  transition: all 0.15s;
}

.pagination a:active { background: var(--color-surface-card); }

.pagination .active {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
}

/* ─── Stats Grid ─── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.stat-card {
  background: var(--color-surface-card);
  border-radius: var(--rounded-lg);
  padding: var(--space-lg) var(--space-sm);
  text-align: center;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 32px;
  color: var(--color-ink);
  letter-spacing: -0.5px;
  line-height: 1;
}

.stat-label {
  font-size: 11px;
  color: var(--color-muted);
  margin-top: var(--space-xxs);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ─── Announcements ─── */
.announcement-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.announcement-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  padding: var(--space-lg);
  text-decoration: none;
  display: block;
  color: inherit;
  transition: border-color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.announcement-card:active { border-color: var(--color-primary); }

.announcement-card h3 { margin-bottom: var(--space-xxs); font-size: 18px; }

.announcement-card .meta {
  font-size: 13px;
  color: var(--color-muted-soft);
  margin-bottom: var(--space-xs);
}

.announcement-card .excerpt { color: var(--color-body); font-size: 14px; }

/* ─── Login ─── */
.login-page {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-canvas);
  padding: var(--space-md);
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-xl);
  padding: var(--space-xl) var(--space-lg);
}

.login-card h2 { text-align: center; margin-bottom: var(--space-lg); }

.login-card .brand-mark { text-align: center; margin-bottom: var(--space-lg); }

.login-card .brand-mark span {
  font-family: var(--font-display);
  font-size: 32px;
  color: var(--color-ink);
}

.login-card .brand-mark .accent { color: var(--color-primary); }

/* ─── Admin ─── */
.admin-section { margin-bottom: var(--space-xl); }
.admin-section h2 { margin-bottom: var(--space-md); }

.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

/* ─── Modal ─── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 200;
  padding: var(--space-md);
}

.modal {
  background: var(--color-canvas);
  border-radius: var(--rounded-xl) var(--rounded-xl) 0 0;
  padding: var(--space-lg);
  width: 100%;
  max-width: 480px;
  max-height: 85vh;
  overflow-y: auto;
}

.modal h3 { margin-bottom: var(--space-md); }

.modal-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
  margin-top: var(--space-lg);
}

/* ─── Badges ─── */
.badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1px;
  border-radius: var(--rounded-pill);
  background: var(--color-surface-card);
  color: var(--color-ink);
}

.badge-coral { background: var(--color-primary); color: var(--color-on-primary); }
.badge-teal { background: var(--color-accent-teal); color: var(--color-on-primary); }

/* ─── Footer ─── */
.site-footer {
  background: var(--color-surface-dark);
  color: var(--color-on-dark-soft);
  padding: var(--space-xl) var(--space-md);
  margin-top: var(--space-xl);
  margin-bottom: calc(var(--bottom-nav-h) + var(--safe-bottom));
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  font-size: 13px;
}

.footer-inner a { color: var(--color-on-dark); }

/* ─── Detail ─── */
.detail-content {
  line-height: 1.7;
  font-size: 15px;
  color: var(--color-body);
}
.detail-content p { margin-bottom: var(--space-md); }

/* ─── Helpers ─── */
.btn-row {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
  flex-wrap: wrap;
}

.inline-form { display: inline; }
.empty-state { text-align: center; padding: var(--space-xxl) var(--space-md); color: var(--color-muted); }
.empty-state p { margin-bottom: var(--space-xxs); }

/* ─── Mobile: hide right slide-menu, use bottom nav instead ─── */
@media (max-width: 767px) {
  .hamburger { display: none; }
  .nav-links { display: none; }
  .nav-overlay { display: none; }
}

/* ─── Desktop / Tablet ─── */
@media (min-width: 768px) {
  :root { --top-nav-h: 64px; --bottom-nav-h: 0px; }

  body { padding-bottom: 0; }

  h1 { font-size: 48px; line-height: 1.1; letter-spacing: -1px; }
  h2 { font-size: 36px; line-height: 1.15; letter-spacing: -0.5px; }
  h3 { font-size: 28px; line-height: 1.2; letter-spacing: -0.3px; }
  h4 { font-size: 22px; line-height: 1.3; }

  .hamburger { display: none; }
  .nav-overlay { display: none; }
  .bottom-nav { display: none; }

  .nav-links {
    position: static;
    width: auto;
    height: auto;
    flex-direction: row;
    padding: 0;
    gap: var(--space-xs);
    background: none;
    border: none;
    overflow: visible;
    transition: none;
  }

  .nav-links a, .nav-links span {
    font-size: 14px;
    padding: 8px 14px;
  }

  .nav-user-mobile { display: none; }
  .nav-user-desktop {
    display: block;
    font-size: 13px !important;
    color: var(--color-muted) !important;
    padding: 8px 0 !important;
  }
  .nav-user-desktop:hover { background: none !important; }

  .search-form {
    flex-direction: column;
    align-items: stretch;
  }

  .search-form .form-input { min-width: 180px; }

  .advanced-panel {
    grid-template-columns: repeat(3, 1fr);
  }

  .table-wrapper {
    margin: 0;
    border-radius: var(--rounded-lg);
    border: 1px solid var(--color-hairline);
  }

  .two-col { grid-template-columns: 1fr 1fr; }

  .stats-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
  .stat-number { font-size: 48px; letter-spacing: -1px; }
  .stat-label { font-size: 14px; }

  .page-header { padding: var(--space-xxl) var(--space-xl) var(--space-xl); }
  .container { padding: 0 var(--space-xl) var(--space-section); }

  .card, .announcement-card { padding: var(--space-xl); }
  .search-section { padding: var(--space-lg); }

  .announcement-list { gap: var(--space-md); }
  .announcement-card h3 { font-size: 22px; }

  .site-footer {
    padding: var(--space-section) var(--space-xl);
    margin-top: var(--space-section);
    margin-bottom: 0;
  }

  .modal-overlay { align-items: center; }
  .modal { border-radius: var(--rounded-lg); }

  .btn { min-height: 40px; height: auto; }
  .btn-sm { min-height: 34px; }

  th { font-size: 12px; letter-spacing: 1.5px; padding: var(--space-sm) var(--space-md); }
  td { padding: var(--space-md); }
  tr:hover td { background: var(--color-surface-soft); }
  .announcement-card:hover { border-color: var(--color-primary); }
  .announcement-card:active { border-color: var(--color-hairline); }

  .login-card { padding: var(--space-xxl); }
  .login-card .brand-mark span { font-size: 36px; }
}

@media (min-width: 1024px) {
  .top-nav { padding: 0 var(--space-xl); }
}