/* ============================================
   DC Tech Events Unified UI — styles.css
   ============================================ */

:root {
  --color-primary: #1a56db;
  --color-primary-hover: #1e40af;
  --color-danger: #dc2626;
  --color-danger-hover: #b91c1c;
  --color-success: #16a34a;
  --color-success-hover: #15803d;
  --color-warning: #d97706;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-nav-bg: #1e293b;
  --color-nav-text: #f1f5f9;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
}

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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
}

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

/* ---- Navigation ---- */
.nav {
  background: var(--color-nav-bg);
  color: var(--color-nav-text);
  height: 56px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.nav .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand { font-weight: 700; font-size: 1.1rem; color: #fff; }

.nav-links { display: flex; gap: 0.5rem; list-style: none; }
.nav-links a {
  color: var(--color-nav-text);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
}
.nav-links a:hover { background: rgba(255, 255, 255, 0.1); text-decoration: none; }

.btn-sign-out {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.8rem;
}
.btn-sign-out:hover { background: rgba(255, 255, 255, 0.1); }

/* ---- Layout ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 2rem 1.5rem; }
.page-header { margin-bottom: 2rem; }
.page-header h1 { font-size: 1.875rem; font-weight: 800; color: #0f172a; }
.page-header p { color: var(--color-text-muted); font-size: 1rem; margin-top: 0.25rem; }

/* ---- Cards & Components ---- */
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

/* ---- Admin Toolbar (Filters & Bulk Actions) ---- */
.toolbar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.filters-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.bulk-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: #f8fafc;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.toolbar-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

/* ---- Tables ---- */
.table-container {
  width: 100%;
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  background: #fff;
}

.admin-table th {
  background: #f1f5f9;
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  color: #475569;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--color-border);
}

.admin-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover { background: #f8fafc; }

/* Column Widths */
.col-check { width: 40px; }
.col-title { min-width: 300px; }
.col-date { width: 110px; white-space: nowrap; }
.col-time { width: 90px; white-space: nowrap; }
.col-loc { width: 160px; }
.col-src { width: 80px; }
.col-actions { width: 100px; text-align: right; }

/* ---- Buttons & Inputs ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
}

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

.btn-outline { background: #fff; border-color: var(--color-border); color: #475569; }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-danger { background: #fff; border-color: #fee2e2; color: #dc2626; }
.btn-danger:hover { background: #dc2626; color: #fff; border-color: #dc2626; }

.btn-sm { padding: 0.25rem 0.6rem; font-size: 0.75rem; }

.form-control {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: #fff;
}

/* ---- Badges ---- */
.badge {
  display: inline-flex;
  padding: 0.125rem 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 4px;
  text-transform: uppercase;
  border: 1px solid transparent;
}
.badge-tag { background: #f1f5f9; color: #475569; border-color: #e2e8f0; }
.badge-hidden { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.badge-merged { background: #fffbeb; color: #92400e; border-color: #fde68a; }

/* ---- Utility ---- */
.hidden { display: none !important; }
.text-muted { color: var(--color-text-muted); }
.spinner {
  width: 1rem; height: 1rem;
  border: 2px solid #e2e8f0; border-top-color: var(--color-primary);
  border-radius: 50%; animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }