/* ============================================================
   UI Components - buttons, forms, tables, alerts
   ============================================================ */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-primary { background: var(--royal); color: var(--white); border-color: var(--royal); }
.btn-primary:hover { background: #1f4a8a; border-color: #1f4a8a; text-decoration: none; color: var(--white); }
.btn-secondary { background: transparent; color: var(--navy); border-color: var(--navy); }
.btn-secondary:hover { background: var(--navy); color: var(--white); text-decoration: none; }
.btn-danger { background: var(--red); color: var(--white); border-color: var(--red); }
.btn-sm { padding: 6px 14px; font-size: 0.82rem; }
.btn-lg { padding: 14px 32px; font-size: 1.1rem; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* Form elements */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--navy);
  margin-bottom: 6px;
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--light-grey);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--navy);
  background: var(--white);
  transition: border-color 0.15s;
  appearance: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--royal);
  box-shadow: 0 0 0 3px rgba(43,91,168,0.12);
}
.form-textarea { min-height: 100px; resize: vertical; }
.form-hint { font-size: 0.82rem; color: var(--mid-grey); margin-top: 5px; }
.form-error { font-size: 0.82rem; color: var(--red); margin-top: 5px; }

/* Day/time toggle chips (multi-select) */
.toggle-group { display: flex; flex-wrap: wrap; gap: 8px; }
.toggle-chip {
  padding: 6px 14px;
  border: 1.5px solid var(--light-grey);
  border-radius: 20px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.12s;
  background: var(--white);
  color: var(--navy);
  user-select: none;
}
.toggle-chip:hover { border-color: var(--royal); color: var(--royal); }
.toggle-chip.selected { background: var(--royal); border-color: var(--royal); color: var(--white); }

/* Cards / panels */
.card {
  background: var(--white);
  border: 1.5px solid var(--light-grey);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.3px;
  margin-bottom: 16px;
}

/* Status badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 600;
}
.status-badge.waiting    { background: #FFF3CD; color: #7A6400; }
.status-badge.matched    { background: #D4EDDA; color: #0F400F; }
.status-badge.confirmed  { background: #CCE5FF; color: #003580; }
.status-badge.active     { background: #D4EDDA; color: #0F400F; }
.status-badge.complete   { background: #E2E3E5; color: #383D41; }
.status-badge.forming    { background: #FFF3CD; color: #7A6400; }

/* Alert boxes */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  border-left: 4px solid;
  font-size: 0.9rem;
  margin-bottom: 16px;
}
.alert-info    { background: #EEF3FF; border-color: var(--royal); color: #1a2e5a; }
.alert-success { background: #F0FFF4; border-color: #28A828; color: #0F400F; }
.alert-warning { background: #FFFBEB; border-color: #F8A000; color: #7A4E00; }
.alert-error   { background: #FFF0F0; border-color: var(--red); color: #7A0010; }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.data-table th {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--mid-grey);
  padding: 8px 12px;
  text-align: left;
  border-bottom: 2px solid var(--light-grey);
}
.data-table td {
  padding: 12px 12px;
  border-bottom: 1px solid var(--light-grey);
  vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--off-white); }

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 20px; height: 20px;
  border: 2px solid var(--light-grey);
  border-top-color: var(--royal);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Grid layouts */
.tier-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.cohort-list { display: flex; flex-direction: column; gap: 12px; }

/* Hero section */
.hero {
  background: var(--navy);
  color: var(--white);
  padding: 72px 24px 56px;
  text-align: center;
}
.hero h1 { font-size: clamp(2.4rem, 5vw, 4rem); color: var(--white); margin-bottom: 16px; }
.hero p { font-size: 1.1rem; opacity: 0.8; max-width: 560px; margin: 0 auto 32px; line-height: 1.6; font-weight: 400; text-transform: none; letter-spacing: 0; }
.hero .btn { font-size: 1rem; padding: 13px 32px; }

/* Section headings */
.section-heading {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--navy);
  margin-bottom: 8px;
}
.section-subheading {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--mid-grey);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 32px;
}

/* Responsive */
@media (max-width: 640px) {
  .header-inner { padding: 0 16px; }
  .page { padding: 32px 16px; }
  .tier-grid { grid-template-columns: 1fr; }
  .cohort-card { grid-template-columns: auto 1fr; }
  .cohort-card-slots { display: none; }
}