/* =========================================================
   Exam Registration Center — Main Stylesheet
   ========================================================= */

:root {
  --color-primary: #1a2f4a;
  --color-primary-light: #2c4a72;
  --color-accent: #f0a500;
  --color-success: #28a745;
  --color-danger: #dc3545;
  --color-bg: #f4f6f8;
  --color-border: #dee2e6;
  --font-mono: 'Courier New', Courier, monospace;
}

/* ── Layout ───────────────────────────────────────────── */
body {
  background-color: var(--color-bg);
  font-size: 0.95rem;
}

main.container {
  min-height: calc(100vh - 130px);
}

/* ── Navbar ───────────────────────────────────────────── */
.navbar-brand {
  letter-spacing: 0.02em;
}

/* ── Cards ────────────────────────────────────────────── */
.card {
  border-radius: 8px;
}

.card.shadow-sm {
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.08) !important;
}

/* ── Stat Cards ───────────────────────────────────────── */
#stats-cards .card {
  transition: transform 0.15s ease;
}

#stats-cards .card:hover {
  transform: translateY(-3px);
}

/* ── Tables ───────────────────────────────────────────── */
.table th {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.table td {
  vertical-align: middle;
  font-size: 0.88rem;
}

/* ── Badges ───────────────────────────────────────────── */
.badge.status-pending     { background-color: #ffc107; color: #212529; }
.badge.status-verified    { background-color: #28a745; }
.badge.status-cancelled   { background-color: #dc3545; }
.badge.status-exam_taken  { background-color: #17a2b8; }

/* ── Forms ────────────────────────────────────────────── */
.form-label {
  font-weight: 500;
  font-size: 0.88rem;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 0.2rem rgba(44, 74, 114, 0.2);
}

/* ── Terminal ─────────────────────────────────────────── */
#terminal-wrapper .card-header {
  background-color: #f8f9fa;
  font-size: 0.9rem;
}

/* ── Registration Steps ───────────────────────────────── */
.step-indicator {
  font-size: 0.88rem;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 8px;
}

.step-indicator .step {
  cursor: default;
  padding: 4px 8px;
  border-radius: 4px;
}

.step-indicator .step.active {
  background-color: var(--color-primary);
  color: #fff;
}

/* ── OCR Preview ──────────────────────────────────────── */
.ocr-preview img {
  max-height: 160px;
  border: 2px dashed var(--color-border);
  border-radius: 6px;
  padding: 4px;
}

/* ── Center Code ──────────────────────────────────────── */
.center-code {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

/* ── Buttons ──────────────────────────────────────────── */
.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

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

/* ── Footer ───────────────────────────────────────────── */
footer {
  font-size: 0.82rem;
}

/* ── Responsive Tweaks ────────────────────────────────── */
@media (max-width: 991.98px) {
  /* Navbar auth section: stack vertically inside collapsed menu */
  #nav-auth-section {
    flex-direction: column;
    align-items: flex-start !important;
    gap: 6px !important;
    padding: 8px 0 4px;
    border-top: 1px solid rgba(255,255,255,0.15);
    margin-top: 6px;
  }
  #nav-auth-section .btn {
    width: 100%;
    text-align: left;
  }
  #nav-username {
    font-size: 0.9rem;
    padding-left: 2px;
  }
}

@media (max-width: 767.98px) {
  /* Step indicator wraps cleanly */
  .step-indicator {
    flex-wrap: wrap;
    gap: 6px !important;
  }
  .step-indicator .step {
    font-size: 0.82rem;
    padding: 4px 6px;
  }

  /* Form nav buttons full-width on mobile */
  .form-step .d-flex.justify-content-between {
    flex-direction: column;
    gap: 8px;
  }
  .form-step .d-flex.justify-content-between .btn {
    width: 100%;
  }

  /* Terminal header: stack badge under heading */
  #terminal-wrapper > .d-flex {
    flex-direction: column;
    align-items: flex-start !important;
    gap: 6px;
  }

  /* Landing hero buttons: stack on mobile */
  .hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  .hero-buttons .btn {
    width: 100%;
  }

  /* Dashboard quick-nav: 2 per row on mobile */
  #stats-cards .col-md-3 {
    flex: 0 0 50%;
    max-width: 50%;
  }

  /* Table font size */
  .table-responsive {
    font-size: 0.8rem;
  }

  /* Page headings with action buttons: stack */
  .page-header-row {
    flex-direction: column;
    align-items: flex-start !important;
    gap: 8px;
  }

  /* Payment tabs: scrollable on small screens */
  #payment-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
  }
  #payment-tabs .nav-link {
    white-space: nowrap;
  }

  /* Reconcile upload form: full-width button */
  .reconcile-upload-btn {
    width: 100%;
  }

  /* Admin filter rows: full width selects */
  .filter-row .btn {
    width: 100%;
  }
}