/* ============================================================
   Arawan LMS — Main Stylesheet
   ============================================================ */

/* ---- Custom properties ---- */
:root {
  --primary:       #1a3c5e;
  --primary-dark:  #122840;
  --primary-light: #234d78;
  --accent:        #e8a020;
  --accent-dark:   #c88010;
  --success:       #28a745;
  --danger:        #dc3545;
  --warning:       #ffc107;
  --info:          #17a2b8;
  --dark:          #212529;
  --secondary:     #6c757d;
  --body-bg:       #f0f3f8;
  --card-bg:       #ffffff;
  --border:        #dee2e6;
  --sidebar-width: 260px;
  --topbar-height: 60px;
  --radius:        8px;
  --shadow:        0 2px 12px rgba(0,0,0,.08);
  --transition:    .2s ease;
}

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

html { font-size: 15px; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--body-bg);
  color: var(--dark);
  line-height: 1.5;
}

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

/* ============================================================
   LAYOUT
   ============================================================ */

.app-wrapper {
  display: flex;
  min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-width);
  background: var(--primary);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 1000;
  transition: width var(--transition), transform var(--transition);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 20px 16px;
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,.1);
  min-height: var(--topbar-height);
}

.sidebar-brand i {
  font-size: 1.4rem;
  color: var(--accent);
}

/* Nav items */
.sidebar-nav {
  flex: 1;
  padding: 12px 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 20px;
  color: rgba(255,255,255,.75);
  font-size: .9rem;
  transition: background var(--transition), color var(--transition);
  cursor: pointer;
}

.nav-item:hover {
  background: rgba(255,255,255,.08);
  color: #fff;
}

.nav-item.active {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

.nav-item i {
  width: 20px;
  text-align: center;
  font-size: 1rem;
}

/* Sidebar footer */
.sidebar-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-top: 1px solid rgba(255,255,255,.1);
  gap: 10px;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,.8);
  min-width: 0;
}

.user-info i { color: var(--accent); flex-shrink: 0; }

.user-name {
  font-size: .85rem;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: .75rem;
  color: rgba(255,255,255,.55);
}

.btn-logout {
  color: rgba(255,255,255,.6);
  font-size: 1.1rem;
  padding: 6px;
  border-radius: 50%;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}
.btn-logout:hover { background: rgba(255,255,255,.12); color: var(--danger); }

/* ---- Main content ---- */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--transition);
}

/* ---- Topbar ---- */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  height: var(--topbar-height);
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 900;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}

.sidebar-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius);
  transition: background var(--transition);
}
.sidebar-toggle:hover { background: var(--body-bg); }

.topbar-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--dark);
  flex: 1;
}

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

.topbar-date {
  font-size: .82rem;
  color: var(--secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.topbar-logout {
  color: var(--secondary);
  font-size: 1.1rem;
  padding: 6px 8px;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}
.topbar-logout:hover { background: var(--body-bg); color: var(--danger); }

/* ---- Content area ---- */
.content-area {
  flex: 1;
  padding: 24px;
}

/* ============================================================
   COMPONENTS
   ============================================================ */

/* ---- Cards ---- */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title i { color: var(--primary); }

.card-body { padding: 20px; }

.card-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: var(--body-bg);
  font-size: .85rem;
  color: var(--secondary);
}

/* ---- KPI Cards ---- */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  border-left: 4px solid var(--primary);
}

.kpi-card.success  { border-left-color: var(--success); }
.kpi-card.danger   { border-left-color: var(--danger); }
.kpi-card.warning  { border-left-color: var(--warning); }
.kpi-card.info     { border-left-color: var(--info); }
.kpi-card.accent   { border-left-color: var(--accent); }

.kpi-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(26,60,94,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--primary);
  flex-shrink: 0;
}

.kpi-card.success .kpi-icon  { background: rgba(40,167,69,.12);  color: var(--success); }
.kpi-card.danger  .kpi-icon  { background: rgba(220,53,69,.12);  color: var(--danger); }
.kpi-card.warning .kpi-icon  { background: rgba(255,193,7,.12);  color: #b38600; }
.kpi-card.info    .kpi-icon  { background: rgba(23,162,184,.12); color: var(--info); }
.kpi-card.accent  .kpi-icon  { background: rgba(232,160,32,.12); color: var(--accent-dark); }

.kpi-data {}
.kpi-value {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--dark);
}
.kpi-label {
  font-size: .8rem;
  color: var(--secondary);
  margin-top: 2px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: none;
  font-size: .875rem;
  font-weight: 500;
  cursor: pointer;
  transition: filter var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover { filter: brightness(.92); box-shadow: 0 2px 6px rgba(0,0,0,.15); }
.btn:active { filter: brightness(.85); }
.btn:disabled { opacity: .6; cursor: not-allowed; }

.btn-primary   { background: var(--primary);   color: #fff; }
.btn-success   { background: var(--success);   color: #fff; }
.btn-danger    { background: var(--danger);    color: #fff; }
.btn-warning   { background: var(--warning);   color: #212529; }
.btn-info      { background: var(--info);      color: #fff; }
.btn-secondary { background: var(--secondary); color: #fff; }
.btn-accent    { background: var(--accent);    color: #fff; }
.btn-light     { background: var(--body-bg);   color: var(--dark); border: 1px solid var(--border); }

.btn-sm { padding: 5px 10px; font-size: .8rem; }
.btn-lg { padding: 11px 22px; font-size: 1rem; }

.btn-icon {
  width: 32px; height: 32px; padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 6px;
  border: none; cursor: pointer; transition: filter var(--transition);
}
.btn-icon:hover { filter: brightness(.88); }

/* ---- Badges ---- */
.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .3px;
}

.badge-success   { background: rgba(40,167,69,.15);  color: #1a6b2e; }
.badge-danger    { background: rgba(220,53,69,.15);  color: #9b1c28; }
.badge-warning   { background: rgba(255,193,7,.2);   color: #856404; }
.badge-info      { background: rgba(23,162,184,.15); color: #0d6877; }
.badge-secondary { background: rgba(108,117,125,.15);color: #495057; }
.badge-dark      { background: rgba(33,37,41,.15);   color: #212529; }

/* ---- Tables ---- */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}

table.data-table th {
  background: var(--primary);
  color: #fff;
  padding: 11px 14px;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

table.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

table.data-table tbody tr:last-child td { border-bottom: none; }
table.data-table tbody tr:hover { background: rgba(26,60,94,.04); }
table.data-table tbody tr:nth-child(even) { background: rgba(0,0,0,.02); }
table.data-table tbody tr:nth-child(even):hover { background: rgba(26,60,94,.04); }

.actions { display: flex; gap: 6px; }

/* ---- Forms ---- */
.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: .875rem;
  font-weight: 500;
  color: var(--dark);
  margin-bottom: 5px;
}

.form-label .required { color: var(--danger); margin-left: 2px; }

.form-control {
  display: block;
  width: 100%;
  padding: 9px 12px;
  font-size: .9rem;
  color: var(--dark);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  line-height: 1.4;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,60,94,.12);
}

.form-control:disabled, .form-control[readonly] {
  background: var(--body-bg);
  color: var(--secondary);
}

select.form-control { cursor: pointer; }

textarea.form-control { resize: vertical; min-height: 90px; }

.form-hint {
  font-size: .78rem;
  color: var(--secondary);
  margin-top: 4px;
}

.form-error {
  font-size: .78rem;
  color: var(--danger);
  margin-top: 4px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.form-section-title {
  font-size: .9rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: .8px;
  margin: 24px 0 14px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--primary);
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

/* ---- Alerts ---- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: .9rem;
  position: relative;
}

.alert i { margin-top: 1px; flex-shrink: 0; }

.alert-success { background: rgba(40,167,69,.12);  color: #1a6b2e; border: 1px solid rgba(40,167,69,.3); }
.alert-danger  { background: rgba(220,53,69,.12);  color: #9b1c28; border: 1px solid rgba(220,53,69,.3); }
.alert-warning { background: rgba(255,193,7,.15);  color: #856404; border: 1px solid rgba(255,193,7,.4); }
.alert-info    { background: rgba(23,162,184,.12); color: #0d6877; border: 1px solid rgba(23,162,184,.3); }

.alert-close {
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
  opacity: .6;
  font-size: .85rem;
  padding: 2px 4px;
  color: inherit;
  flex-shrink: 0;
}
.alert-close:hover { opacity: 1; }

/* ---- Page header ---- */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.page-header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-header h1 i { font-size: 1.2rem; color: var(--accent); }

.breadcrumb {
  font-size: .8rem;
  color: var(--secondary);
  margin-top: 2px;
}

.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { margin: 0 5px; }

/* ---- Tabs ---- */
.tab-bar {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 20px;
  overflow-x: auto;
}

.tab-item {
  padding: 10px 20px;
  font-size: .875rem;
  font-weight: 500;
  color: var(--secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.tab-item:hover { color: var(--primary); }
.tab-item.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ---- Stats summary row ---- */
.summary-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.summary-item {
  display: flex;
  flex-direction: column;
  min-width: 120px;
}

.summary-item .s-label { font-size: .78rem; color: var(--secondary); }
.summary-item .s-value { font-size: 1.1rem; font-weight: 700; color: var(--dark); }

/* ---- Progress bar ---- */
.progress {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: 4px;
  background: var(--primary);
  transition: width .3s ease;
}

.progress-bar.success { background: var(--success); }
.progress-bar.danger  { background: var(--danger); }
.progress-bar.warning { background: var(--warning); }

/* ---- Utility ---- */
.text-right   { text-align: right; }
.text-center  { text-align: center; }
.text-muted   { color: var(--secondary); }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.text-warning { color: #856404; }
.text-primary { color: var(--primary); }
.font-bold    { font-weight: 700; }
.font-mono    { font-family: 'Courier New', monospace; }
.d-flex       { display: flex; }
.align-center { align-items: center; }
.gap-8        { gap: 8px; }
.gap-12       { gap: 12px; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }

/* ---- Amortization table ---- */
.amort-table th { font-size: .8rem; }
.amort-table td { font-size: .82rem; }
.amort-table tr.paid td { color: var(--secondary); text-decoration: line-through; }
.amort-table tr.overdue td { color: var(--danger); font-weight: 600; }
.amort-table tr.current td { background: rgba(232,160,32,.08); }

/* ---- Modal ---- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}
.modal-overlay.open { display: flex; }

.modal {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: 0 8px 40px rgba(0,0,0,.2);
  max-width: 640px;
  width: 94%;
  max-height: 90vh;
  overflow-y: auto;
}

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

.modal-title { font-weight: 700; font-size: 1rem; }

.modal-close {
  background: none; border: none; font-size: 1.2rem;
  cursor: pointer; color: var(--secondary); padding: 4px;
}
.modal-close:hover { color: var(--danger); }

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

/* ---- Empty state ---- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--secondary);
}
.empty-state i { font-size: 3rem; margin-bottom: 16px; opacity: .4; }
.empty-state p { font-size: .95rem; }

/* ---- Score gauge ---- */
.score-display {
  text-align: center;
  padding: 20px;
}
.score-number {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
}
.score-grade  { font-size: 1rem; font-weight: 600; margin-top: 4px; }

/* ============================================================
   LOGIN PAGE
   ============================================================ */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
  padding: 20px;
}

.login-card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 16px 60px rgba(0,0,0,.3);
  padding: 40px 36px;
  width: 100%;
  max-width: 420px;
}

.login-logo {
  text-align: center;
  margin-bottom: 28px;
}

.login-logo i {
  font-size: 2.8rem;
  color: var(--primary);
  display: block;
  margin-bottom: 10px;
}

.login-logo h1 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 2px;
}

.login-logo p { font-size: .85rem; color: var(--secondary); }

.login-card .form-control {
  padding: 11px 14px;
  font-size: .95rem;
}

.login-card .btn-primary {
  width: 100%;
  padding: 12px;
  font-size: 1rem;
  margin-top: 4px;
  background: var(--primary);
  justify-content: center;
}

.login-footer { text-align: center; margin-top: 20px; font-size: .8rem; color: var(--secondary); }

.demo-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 10px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #f8f9fa;
  cursor: pointer;
  transition: background .15s, border-color .15s, transform .1s;
  font-family: inherit;
  text-align: center;
}
.demo-chip:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}
.demo-chip i  { font-size: 1rem; color: var(--primary); }
.demo-chip:hover i { color: var(--accent); }
.demo-chip span { font-size: .8rem; font-weight: 600; line-height: 1.2; }
.demo-chip small { font-size: .7rem; opacity: .7; font-family: monospace; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    width: var(--sidebar-width);
  }

  .sidebar.open { transform: translateX(0); }

  .main-content { margin-left: 0; }

  .kpi-grid { grid-template-columns: repeat(2, 1fr); }

  .content-area { padding: 16px; }

  .topbar-date { display: none; }

  .page-header h1 { font-size: 1.1rem; }
}

@media (max-width: 480px) {
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .login-card { padding: 28px 20px; }
}

/* DataTables overrides */
.dataTables_wrapper .dataTables_filter input {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-size: .85rem;
  outline: none;
}
.dataTables_wrapper .dataTables_filter input:focus { border-color: var(--primary); }
.dataTables_wrapper .dataTables_length select {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 8px;
}
.dataTables_wrapper .dataTables_paginate .paginate_button {
  border-radius: 4px !important;
  padding: 4px 10px !important;
}
.dataTables_wrapper .dataTables_paginate .paginate_button.current {
  background: var(--primary) !important;
  border-color: var(--primary) !important;
  color: #fff !important;
}
.dataTables_info { font-size: .82rem; color: var(--secondary); }