/* ==========================================================================
   BISA (Butir Instrumen Soal Analitik)
   Design System & Application Stylesheet
   Theme: Modern EdTech Teal / Minimalist Dashboard / Print-Ready A4
   ========================================================================== */

:root {
  --primary-50: #f0fdfa;
  --primary-100: #ccfbf1;
  --primary-200: #99f6e4;
  --primary-500: #14b8a6;
  --primary-600: #0d9488;
  --primary-700: #0f766e;
  --primary-800: #115e59;
  --primary-900: #134e4a;

  --secondary-500: #0284c7;
  --secondary-600: #0369a1;

  --success-bg: #ecfdf5;
  --success-text: #065f46;
  --success-border: #a7f3d0;
  --success-solid: #10b981;

  --warning-bg: #fffbeb;
  --warning-text: #92400e;
  --warning-border: #fde68a;
  --warning-solid: #f59e0b;

  --danger-bg: #fef2f2;
  --danger-text: #991b1b;
  --danger-border: #fecaca;
  --danger-solid: #ef4444;

  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  --sidebar-width: 260px;
  --topbar-height: 64px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* LAYOUT CONTAINER */
.app-layout {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* SIDEBAR NAVIGATION */
.sidebar {
  width: var(--sidebar-width);
  background-color: #ffffff;
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 40;
  transition: transform 0.3s ease;
}

.sidebar-header {
  height: var(--topbar-height);
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--gray-200);
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-600), var(--primary-800));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 18px;
  box-shadow: 0 2px 4px rgba(13, 148, 136, 0.3);
}

.brand-text h1 {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary-800);
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.brand-text p {
  font-size: 11px;
  color: var(--gray-500);
  font-weight: 500;
}

.sidebar-cta {
  padding: 16px 16px 8px 16px;
}

.btn-primary-cta {
  width: 100%;
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  padding: 11px 16px;
  font-size: 13.5px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(13, 148, 136, 0.25);
  transition: all 0.2s ease;
}

.btn-primary-cta:hover {
  background: linear-gradient(135deg, var(--primary-700), var(--primary-800));
  box-shadow: 0 4px 8px rgba(13, 148, 136, 0.35);
  transform: translateY(-1px);
}

.sidebar-nav {
  flex: 1;
  padding: 12px 14px;
  overflow-y: auto;
}

.nav-section-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--gray-400);
  letter-spacing: 0.5px;
  padding: 8px 10px 4px 10px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--gray-600);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  transition: all 0.15s ease;
  cursor: pointer;
  margin-bottom: 2px;
}

.nav-item:hover {
  background-color: var(--gray-100);
  color: var(--gray-900);
}

.nav-item.active {
  background-color: var(--primary-50);
  color: var(--primary-700);
  font-weight: 600;
}

.nav-item.active .nav-icon {
  color: var(--primary-600);
}

.nav-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
  color: var(--gray-400);
}

.sidebar-footer {
  padding: 14px 16px;
  border-top: 1px solid var(--gray-200);
  background-color: var(--gray-50);
}

.user-snippet {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--primary-100);
  color: var(--primary-800);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  border: 1px solid var(--primary-200);
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--gray-800);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-school {
  font-size: 11px;
  color: var(--gray-500);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* MAIN CONTENT AREA */
.main-area {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* TOPBAR */
.topbar {
  height: var(--topbar-height);
  background-color: #ffffff;
  border-bottom: 1px solid var(--gray-200);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 30;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--gray-600);
  cursor: pointer;
}

.page-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--gray-500);
}

.breadcrumb-current {
  font-weight: 600;
  color: var(--gray-900);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.badge-status-sync {
  background-color: var(--success-bg);
  color: var(--success-text);
  border: 1px solid var(--success-border);
  font-size: 11.5px;
  padding: 4px 10px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.sync-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--success-solid);
}

/* CONTENT CONTAINER */
.content-container {
  padding: 24px;
  max-width: 1320px;
  width: 100%;
  margin: 0 auto;
}

/* CARDS */
.card {
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
  overflow: hidden;
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #ffffff;
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-subtitle {
  font-size: 12px;
  color: var(--gray-500);
  font-weight: 400;
  margin-top: 2px;
}

.card-body {
  padding: 20px;
}

/* KPI STATS GRID */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-info p {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-size: 26px;
  font-weight: 800;
  color: var(--gray-900);
  margin: 4px 0 2px 0;
  line-height: 1.1;
}

.stat-sub {
  font-size: 12px;
  color: var(--gray-500);
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.icon-teal {
  background-color: var(--primary-100);
  color: var(--primary-700);
}

.icon-blue {
  background-color: #e0f2fe;
  color: var(--secondary-600);
}

.icon-emerald {
  background-color: var(--success-bg);
  color: var(--success-text);
}

.icon-amber {
  background-color: var(--warning-bg);
  color: var(--warning-text);
}

.icon-rose {
  background-color: var(--danger-bg);
  color: var(--danger-text);
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary-600);
  color: #ffffff;
}
.btn-primary:hover {
  background-color: var(--primary-700);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--gray-700);
  border-color: var(--gray-300);
}
.btn-secondary:hover {
  background-color: var(--gray-100);
  color: var(--gray-900);
}

.btn-success {
  background-color: var(--success-solid);
  color: #ffffff;
}
.btn-success:hover {
  background-color: #059669;
}

.btn-outline-primary {
  background-color: transparent;
  color: var(--primary-700);
  border-color: var(--primary-500);
}
.btn-outline-primary:hover {
  background-color: var(--primary-50);
}

.btn-danger {
  background-color: var(--danger-solid);
  color: #ffffff;
}
.btn-danger:hover {
  background-color: #dc2626;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

.btn-lg {
  padding: 12px 22px;
  font-size: 15px;
}

/* BADGES */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1.2;
}

.badge-success, .badge-pertahankan {
  background-color: var(--success-bg);
  color: var(--success-text);
  border: 1px solid var(--success-border);
}

.badge-warning, .badge-revisi {
  background-color: var(--warning-bg);
  color: var(--warning-text);
  border: 1px solid var(--warning-border);
}

.badge-danger, .badge-buang {
  background-color: var(--danger-bg);
  color: var(--danger-text);
  border: 1px solid var(--danger-border);
}

.badge-teal {
  background-color: var(--primary-50);
  color: var(--primary-800);
  border: 1px solid var(--primary-200);
}

.badge-key {
  background-color: #e0e7ff;
  color: #3730a3;
  border: 1px solid #c7d2fe;
}

.badge-negative {
  background-color: #450a0a;
  color: #fecaca;
}

.badge-easy {
  background-color: #ecfdf5;
  color: #047857;
}

.badge-medium {
  background-color: #eff6ff;
  color: #1d4ed8;
}

.badge-hard {
  background-color: #fff1f2;
  color: #be123c;
}

/* TABLES */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  background: #ffffff;
}

.data-table-ui {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

.data-table-ui th {
  background-color: var(--gray-50);
  padding: 12px 14px;
  font-weight: 700;
  color: var(--gray-700);
  border-bottom: 1px solid var(--gray-200);
  white-space: nowrap;
}

.data-table-ui td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-800);
}

.data-table-ui tbody tr:hover {
  background-color: var(--primary-50);
}

.data-table-ui tbody tr:last-child td {
  border-bottom: none;
}

/* INTERACTIVE EDITABLE GRID (STUDENT INPUT) */
.editable-grid-container {
  max-height: 480px;
  overflow: auto;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
}

.editable-grid {
  border-collapse: collapse;
  width: 100%;
  font-size: 12.5px;
}

.editable-grid th {
  position: sticky;
  top: 0;
  background-color: #f8fafc;
  z-index: 10;
  padding: 8px 10px;
  border: 1px solid var(--gray-300);
  font-weight: 700;
  text-align: center;
}

.editable-grid td {
  border: 1px solid var(--gray-300);
  padding: 0;
  text-align: center;
}

.grid-input {
  width: 100%;
  height: 32px;
  border: none;
  text-align: center;
  font-size: 12.5px;
  font-weight: 600;
  background: transparent;
  outline: none;
}

.grid-input:focus {
  background-color: #f0fdfa;
  outline: 2px solid var(--primary-500);
}

.grid-input-name {
  text-align: left;
  padding-left: 8px;
  font-weight: 500;
}

/* FORMS */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 9px 12px;
  font-size: 13.5px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  color: var(--gray-900);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

/* WIZARD STEPS */
.wizard-steps {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  position: relative;
}

.wizard-steps::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 30px;
  right: 30px;
  height: 2px;
  background-color: var(--gray-200);
  z-index: 1;
  transform: translateY(-50%);
}

.wizard-step {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background-color: var(--gray-50);
  padding: 0 10px;
}

.step-circle {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background-color: #ffffff;
  border: 2px solid var(--gray-300);
  color: var(--gray-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  transition: all 0.2s ease;
}

.wizard-step.active .step-circle {
  border-color: var(--primary-600);
  background-color: var(--primary-600);
  color: #ffffff;
  box-shadow: 0 0 0 4px var(--primary-100);
}

.wizard-step.completed .step-circle {
  border-color: var(--primary-600);
  background-color: var(--primary-100);
  color: var(--primary-700);
}

.step-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-600);
}

.wizard-step.active .step-label {
  color: var(--primary-800);
}

/* MODAL */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
}

.modal-backdrop.show {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  max-width: 720px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: transform 0.2s ease;
  overflow: hidden;
}

.modal-backdrop.show .modal-dialog {
  transform: scale(1);
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
}

.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--gray-400);
  cursor: pointer;
  padding: 4px;
}

.modal-close:hover {
  color: var(--gray-800);
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--gray-200);
  background-color: var(--gray-50);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* TOAST */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-left: 4px solid var(--primary-600);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-size: 13.5px;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 280px;
  animation: slideIn 0.3s ease;
}

.toast.toast-success { border-left-color: var(--success-solid); }
.toast.toast-error { border-left-color: var(--danger-solid); }
.toast.toast-warning { border-left-color: var(--warning-solid); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.mobile-open {
    transform: translateX(0);
  }
  .main-area {
    margin-left: 0;
  }
  .mobile-menu-btn {
    display: block;
  }
}