/* =========================================================
   OKSY3 Academic Module — academic.css
   ตัวอักษรฐาน 14px, Sidebar 240px, ธีมน้ำเงินเข้ม
========================================================= */

/* --- CSS Variables --- */
:root {
  --sidebar-w: 240px;
  --sidebar-bg1: #0f1e3c;
  --sidebar-bg2: #1a3560;
  --content-bg: #f0f4f8;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --success: #16a34a;
  --warning: #d97706;
  --info: #0891b2;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --card-shadow:
    0 1px 4px rgba(15, 23, 42, 0.08), 0 2px 8px rgba(15, 23, 42, 0.04);
  --radius: 10px;
}

/* --- Reset --- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: Tahoma, "Sarabun", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  background: var(--content-bg);
  color: var(--text);
}
a {
  color: var(--primary);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
h1,
h2,
h3,
h4 {
  margin: 0 0 8px 0;
  font-weight: 700;
}

/* --- App Shell --- */
.app-shell {
  display: flex;
  min-height: 100vh;
}

/* =====================================================
   SIDEBAR
===================================================== */
.sidebar {
  width: var(--sidebar-w);
  background: linear-gradient(
    180deg,
    var(--sidebar-bg1) 0%,
    var(--sidebar-bg2) 100%
  );
  color: #e8f0ff;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 200;
  transition: transform 0.25s ease;
}
.sidebar-brand {
  padding: 18px 16px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}
.sidebar-brand .brand-logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
}
.sidebar-brand .brand-sub {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 1px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.sidebar-nav {
  flex: 1;
  padding: 8px 0 12px;
  overflow-y: auto;
}
.sidebar-footer {
  padding: 12px 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}
.sidebar-footer a {
  display: block;
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
  padding: 7px 10px;
  border-radius: 7px;
  transition: background 0.15s;
}
.sidebar-footer a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  text-decoration: none;
}

/* --- Menu Groups --- */
.menu-group {
  margin-bottom: 2px;
}
.menu-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
  cursor: pointer;
  user-select: none;
  border-radius: 6px;
  margin: 2px 6px 0;
  transition: background 0.15s;
  line-height: 1.4;
}
.menu-group-header:hover {
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.65);
}
.menu-group-header .mg-arrow {
  font-size: 9px;
  transition: transform 0.2s;
  color: rgba(255, 255, 255, 0.35);
}
.menu-group.open .mg-arrow {
  transform: rotate(90deg);
}
.menu-items {
  display: none;
}
.menu-group.open .menu-items {
  display: block;
}
/* Always-visible group (no toggle needed) */
.menu-group.always-open .menu-items {
  display: block;
}
.menu-group.always-open .menu-group-header {
  cursor: default;
}

/* --- Nav Links --- */
.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 15.5px;
  padding: 9px 15px;
  border-radius: 7px;
  margin: 1px 8px;
  text-decoration: none;
  transition:
    background 0.15s,
    color 0.15s;
  border-left: 3px solid transparent;
  line-height: 1.4;
}
.nav-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  text-decoration: none;
}
.nav-link.active {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border-left-color: #60a5fa;
  font-weight: 600;
}
.nav-link .nav-icon {
  width: 15px;
  text-align: center;
  font-size: 13px;
  flex-shrink: 0;
}

/* =====================================================
   CONTENT AREA
===================================================== */
.content {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- Topbar --- */
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 100;
  flex-shrink: 0;
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}
.topbar-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}
.topbar-breadcrumb {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.user-pill {
  background: #f1f5f9;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 13px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
}
.topbar-back {
  font-size: 12px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  transition: background 0.15s;
}
.topbar-back:hover {
  background: #f1f5f9;
  text-decoration: none;
  color: var(--text);
}
.hamburger {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 8px;
  cursor: pointer;
  font-size: 16px;
  color: var(--text);
}

/* --- Page body --- */
.page-body {
  padding: 20px 24px;
  flex: 1;
}

/* =====================================================
   CARDS
===================================================== */
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 18px;
}
.card-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text);
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

/* --- Stat Cards --- */
.stat-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 16px 18px;
  border-top: 4px solid var(--primary);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.stat-card.stat-blue {
  border-top-color: #2563eb;
}
.stat-card.stat-green {
  border-top-color: #16a34a;
}
.stat-card.stat-red {
  border-top-color: #dc2626;
}
.stat-card.stat-yellow {
  border-top-color: #d97706;
}
.stat-card.stat-purple {
  border-top-color: #7c3aed;
}
.stat-card.stat-teal {
  border-top-color: #0891b2;
}
.stat-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}
.stat-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.stat-icon.bg-blue {
  background: #dbeafe;
  color: #2563eb;
}
.stat-icon.bg-green {
  background: #dcfce7;
  color: #16a34a;
}
.stat-icon.bg-red {
  background: #fee2e2;
  color: #dc2626;
}
.stat-icon.bg-yellow {
  background: #fef3c7;
  color: #d97706;
}
.stat-icon.bg-purple {
  background: #ede9fe;
  color: #7c3aed;
}
.stat-icon.bg-teal {
  background: #cffafe;
  color: #0891b2;
}
.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}
.stat-label {
  font-size: 12px;
  color: var(--text-muted);
}
.stat-change {
  font-size: 11px;
  color: var(--text-muted);
}

/* =====================================================
   GRID LAYOUTS
===================================================== */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

/* =====================================================
   QUICK ACTIONS
===================================================== */
.quick-actions {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}
.quick-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 8px;
  text-decoration: none;
  color: var(--text);
  font-size: 12px;
  text-align: center;
  transition:
    border-color 0.15s,
    box-shadow 0.15s,
    background 0.15s;
  cursor: pointer;
}
.quick-action-btn:hover {
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.1);
  background: #f0f4ff;
  text-decoration: none;
  color: var(--primary);
}
.quick-action-btn .qa-icon {
  font-size: 22px;
}

/* =====================================================
   TABLES
===================================================== */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
}
.table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-size: 13px;
}
.table th {
  background: #f8fafc;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 9px 10px;
  border-bottom: 2px solid var(--border);
  text-align: left;
  white-space: nowrap;
}
.table td {
  padding: 9px 10px;
  border-bottom: 1px solid #f1f5f9;
  color: var(--text);
  vertical-align: middle;
}
.table tr:last-child td {
  border-bottom: none;
}
.table tbody tr:hover td {
  background: #f8faff;
}
.table .text-right {
  text-align: right;
}
.table .text-center {
  text-align: center;
}

/* =====================================================
   TOOLBAR
===================================================== */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.toolbar-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 7px;
  overflow: hidden;
  background: #fff;
}
.search-box input {
  border: none;
  padding: 7px 10px;
  font-size: 13px;
  outline: none;
  min-width: 200px;
  color: var(--text);
}
.search-box button {
  border: none;
  background: var(--primary);
  color: #fff;
  padding: 7px 12px;
  cursor: pointer;
  font-size: 13px;
}

/* =====================================================
   BUTTONS
===================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 7px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.4;
  transition:
    background 0.15s,
    box-shadow 0.15s;
  white-space: nowrap;
}
.btn:hover {
  background: var(--primary-dark);
  color: #fff;
  text-decoration: none;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}
.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
  border-radius: 6px;
}
.btn-ghost {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-ghost:hover {
  background: #eff6ff;
  color: var(--primary);
  box-shadow: none;
}
.btn-secondary {
  background: #f1f5f9;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: #e2e8f0;
  color: var(--text);
  box-shadow: none;
}
.btn-danger {
  background: var(--danger);
}
.btn-danger:hover {
  background: #b91c1c;
}
.btn-success {
  background: var(--success);
}
.btn-success:hover {
  background: #15803d;
}
.btn-warning {
  background: var(--warning);
}
.btn-warning:hover {
  background: #b45309;
}
.btn-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

/* =====================================================
   FORMS
===================================================== */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.form-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.form-full {
  grid-column: 1 / -1;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.field label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
}
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid #cbd5e1;
  border-radius: 7px;
  font-size: 13px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  outline: none;
  transition:
    border-color 0.15s,
    box-shadow 0.15s;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.field textarea {
  resize: vertical;
  min-height: 80px;
}
.field .help {
  font-size: 11px;
  color: var(--text-muted);
}
.required-star {
  color: var(--danger);
}

/* =====================================================
   ALERTS
===================================================== */
.alert {
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 14px;
  font-size: 13px;
  border-left: 4px solid currentColor;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.alert-success {
  background: #f0fdf4;
  color: #15803d;
  border-left-color: #16a34a;
}
.alert-error {
  background: #fef2f2;
  color: #b91c1c;
  border-left-color: #dc2626;
}
.alert-warning {
  background: #fffbeb;
  color: #b45309;
  border-left-color: #d97706;
}
.alert-info {
  background: #f0f9ff;
  color: #0369a1;
  border-left-color: #0891b2;
}

/* =====================================================
   BADGES
===================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}
.badge-blue {
  background: #dbeafe;
  color: #1d4ed8;
}
.badge-green {
  background: #dcfce7;
  color: #15803d;
}
.badge-red {
  background: #fee2e2;
  color: #b91c1c;
}
.badge-yellow {
  background: #fef3c7;
  color: #b45309;
}
.badge-gray {
  background: #f1f5f9;
  color: #475569;
}
.badge-purple {
  background: #ede9fe;
  color: #6d28d9;
}
.badge-teal {
  background: #cffafe;
  color: #0e7490;
}

/* --- Risk Badge --- */
.risk-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
}
.risk-badge.risk-high {
  background: #fee2e2;
  color: #b91c1c;
}
.risk-badge.risk-medium {
  background: #fef3c7;
  color: #b45309;
}
.risk-badge.risk-low {
  background: #dcfce7;
  color: #15803d;
}

/* --- Tag Pill (subject group tags) --- */
.tag-pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  background: #e0e7ff;
  color: #3730a3;
  border: 1px solid #c7d2fe;
}

/* =====================================================
   PLACEHOLDER / EMPTY STATE
===================================================== */
.placeholder-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 48px 32px;
  text-align: center;
  max-width: 520px;
  margin: 40px auto;
}
.placeholder-icon {
  font-size: 52px;
  margin-bottom: 14px;
  line-height: 1;
}
.placeholder-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.placeholder-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.placeholder-features {
  text-align: left;
  margin: 14px 0;
  padding-left: 20px;
}
.placeholder-features li {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.phase-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: #fef3c7;
  color: #b45309;
  font-size: 11px;
  font-weight: 700;
  margin-top: 8px;
}
.empty-state {
  text-align: center;
  padding: 32px 16px;
  color: var(--text-muted);
}
.empty-state-icon {
  font-size: 36px;
  margin-bottom: 8px;
}
.empty-state-text {
  font-size: 13px;
}

/* =====================================================
   SECTION LABELS
===================================================== */
.section-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

/* =====================================================
   UTILITY
===================================================== */
.text-center {
  text-align: center;
}
.text-right {
  text-align: right;
}
.text-muted {
  color: var(--text-muted);
}
.text-sm {
  font-size: 12px;
}
.text-xs {
  font-size: 11px;
}
.fw-bold {
  font-weight: 700;
}
.mt-4 {
  margin-top: 4px;
}
.mt-8 {
  margin-top: 8px;
}
.mt-16 {
  margin-top: 16px;
}
.mt-20 {
  margin-top: 20px;
}
.mb-8 {
  margin-bottom: 8px;
}
.mb-14 {
  margin-bottom: 14px;
}
.mb-20 {
  margin-bottom: 20px;
}
.gap-8 {
  gap: 8px;
}
.d-flex {
  display: flex;
}
.align-center {
  align-items: center;
}
.space-between {
  justify-content: space-between;
}
.flex-wrap {
  flex-wrap: wrap;
}

/* Number highlighting */
.num-highlight {
  font-weight: 700;
  color: var(--primary);
}

/* Current-term highlight row */
.current-term-row td {
  background: #f0f9ff;
  font-weight: 600;
}
.current-term-row td:first-child {
  border-left: 3px solid var(--primary);
}

/* =====================================================
   PRINT STYLES
===================================================== */
@media print {
  .sidebar,
  .topbar,
  .toolbar,
  .btn,
  .btn-row,
  .hamburger {
    display: none !important;
  }
  .content {
    margin-left: 0 !important;
  }
  body {
    background: #fff;
    font-size: 12px;
  }
  .card,
  .table-wrap {
    box-shadow: none;
    border: 1px solid #ddd;
  }
  .table th {
    background: #eee !important;
    -webkit-print-color-adjust: exact;
  }
  .page-body {
    padding: 0;
  }
  .print-sheet {
    background: #fff;
    padding: 15mm 20mm;
    max-width: 210mm;
    margin: 0 auto;
  }
}

/* =====================================================
   RESPONSIVE — 1024px
===================================================== */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .quick-actions {
    grid-template-columns: repeat(3, 1fr);
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-grid-3 {
    grid-template-columns: 1fr;
  }
}

/* =====================================================
   RESPONSIVE — 768px (Mobile)
===================================================== */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .content {
    margin-left: 0;
  }
  .hamburger {
    display: inline-flex;
    align-items: center;
  }
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
  .grid-3 {
    grid-template-columns: 1fr 1fr;
  }
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .quick-actions {
    grid-template-columns: repeat(2, 1fr);
  }
  .table-wrap {
    overflow-x: auto;
  }
  .topbar {
    padding: 10px 14px;
  }
  .topbar-title {
    font-size: 15px;
  }
  .page-body {
    padding: 14px;
  }
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .search-box input {
    min-width: 140px;
  }
  .stat-value {
    font-size: 24px;
  }
}

@media (max-width: 480px) {
  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .quick-actions {
    grid-template-columns: repeat(2, 1fr);
  }
}