:root {
  --primary: #116466;
  --primary-dark: #0b4749;
  --primary-soft: #e8f4f2;
  --accent: #e6a84c;
  --bg: #f4f7f8;
  --surface: #ffffff;
  --text: #17252a;
  --muted: #66777c;
  --border: #dce5e7;
  --danger: #c0392b;
  --danger-soft: #fdecea;
  --warning: #a96900;
  --warning-soft: #fff3d6;
  --success: #237a57;
  --success-soft: #e8f6ef;
  --info: #286a9b;
  --info-soft: #eaf3fa;
  --shadow: 0 12px 32px rgba(21, 55, 60, .08);
  --radius: 16px;
}
* { box-sizing: border-box; }
html { font-size: 15px; }
body { margin: 0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--text); background: var(--bg); }
a { color: var(--primary); text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
.app-shell { min-height: 100vh; display: flex; }
.sidebar { width: 260px; position: fixed; inset: 0 auto 0 0; background: linear-gradient(180deg, #0e5759 0%, #093e40 100%); color: #fff; padding: 22px 16px; display: flex; flex-direction: column; z-index: 30; }
.brand { display: flex; align-items: center; gap: 12px; padding: 4px 8px 22px; color: #fff; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; background: var(--accent); color: #263238; font-weight: 900; letter-spacing: -.5px; }
.brand strong { display: block; font-size: 1.12rem; }
.brand small { display: block; color: rgba(255,255,255,.7); margin-top: 2px; max-width: 165px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nav-menu { display: grid; gap: 5px; overflow-y: auto; }
.nav-menu a { color: rgba(255,255,255,.8); display: flex; align-items: center; gap: 12px; padding: 11px 12px; border-radius: 11px; transition: .15s; }
.nav-menu a:hover, .nav-menu a.active { color: #fff; background: rgba(255,255,255,.13); }
.nav-icon { width: 24px; text-align: center; font-size: 1.05rem; }
.sidebar-footer { margin-top: auto; padding-top: 16px; border-top: 1px solid rgba(255,255,255,.12); display: grid; gap: 8px; }
.sidebar-footer a { color: rgba(255,255,255,.75); padding: 7px 10px; }
.main-area { margin-left: 260px; min-width: 0; width: calc(100% - 260px); }
.topbar { height: 82px; background: rgba(255,255,255,.94); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; padding: 14px 28px; position: sticky; top: 0; z-index: 20; }
.topbar h1 { font-size: 1.4rem; margin: 0 0 4px; }
.topbar p { margin: 0; color: var(--muted); font-size: .87rem; }
.profile-chip { display: flex; align-items: center; gap: 9px; color: var(--text); }
.profile-chip > span { width: 37px; height: 37px; display: grid; place-items: center; border-radius: 50%; background: var(--primary-soft); color: var(--primary); font-weight: 800; }
.content-area { padding: 26px; max-width: 1540px; margin: 0 auto; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.panel-header { padding: 18px 20px; display: flex; align-items: center; justify-content: space-between; gap: 15px; border-bottom: 1px solid var(--border); }
.panel-header h2, .panel-header h3 { margin: 0; font-size: 1.05rem; }
.panel-body { padding: 20px; }
.page-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 18px; justify-content: space-between; align-items: center; }
.action-group { display: flex; gap: 8px; flex-wrap: wrap; }
.btn { border: 0; border-radius: 10px; padding: 10px 14px; font-weight: 700; display: inline-flex; align-items: center; justify-content: center; gap: 7px; }
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.secondary { background: #eef3f4; color: var(--text); }
.btn.danger { background: var(--danger-soft); color: var(--danger); }
.btn.success { background: var(--success-soft); color: var(--success); }
.btn.small { padding: 7px 10px; font-size: .84rem; }
.btn.wide { width: 100%; }
.icon-btn { border: 0; background: transparent; font-size: 1.4rem; }
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat-card { padding: 18px; display: flex; justify-content: space-between; gap: 12px; }
.stat-card small { color: var(--muted); display: block; margin-bottom: 9px; }
.stat-card strong { font-size: 1.85rem; line-height: 1; }
.stat-card .stat-icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 13px; background: var(--primary-soft); font-size: 1.25rem; }
.grid-2 { display: grid; grid-template-columns: 1.4fr 1fr; gap: 18px; }
.grid-equal { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 13px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .035em; background: #f8fafb; }
tbody tr:hover { background: #fbfdfd; }
.table-actions { display: flex; gap: 5px; white-space: nowrap; }
.badge { display: inline-flex; align-items: center; border-radius: 999px; padding: 5px 9px; font-size: .76rem; font-weight: 800; }
.badge.success { background: var(--success-soft); color: var(--success); }
.badge.warning { background: var(--warning-soft); color: var(--warning); }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.badge.info { background: var(--info-soft); color: var(--info); }
.alert { border-radius: 11px; padding: 12px 14px; margin-bottom: 15px; font-weight: 600; }
.alert.success { background: var(--success-soft); color: var(--success); }
.alert.warning { background: var(--warning-soft); color: var(--warning); }
.alert.danger { background: var(--danger-soft); color: var(--danger); }
.alert.info { background: var(--info-soft); color: var(--info); }
.form-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.form-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-grid .span-2 { grid-column: span 2; }
.form-grid .span-3 { grid-column: 1 / -1; }
label { color: #34464a; font-size: .86rem; font-weight: 700; }
input, select, textarea { width: 100%; margin-top: 7px; border: 1px solid #cdd9dc; background: #fff; color: var(--text); border-radius: 10px; padding: 10px 11px; outline: none; }
textarea { min-height: 110px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(17,100,102,.1); }
.form-actions { display: flex; gap: 9px; margin-top: 20px; justify-content: flex-end; }
.form-section-title { margin: 23px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); font-weight: 900; color: var(--primary-dark); }
.form-section-title:first-child { margin-top: 0; }
.search-form { display: flex; gap: 8px; flex-wrap: wrap; }
.search-form input, .search-form select { width: auto; min-width: 180px; margin: 0; }
.empty-state { text-align: center; padding: 44px 20px; color: var(--muted); }
.empty-state strong { color: var(--text); display: block; margin-bottom: 6px; }
.muted { color: var(--muted); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.kpi-list { display: grid; gap: 10px; }
.kpi-item { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 11px 0; border-bottom: 1px solid var(--border); }
.kpi-item:last-child { border-bottom: 0; }
.student-head { display: flex; gap: 18px; align-items: center; }
.avatar-large { width: 72px; height: 72px; border-radius: 18px; background: var(--primary-soft); color: var(--primary); font-size: 1.8rem; font-weight: 900; display: grid; place-items: center; }
.student-head h2 { margin: 0 0 6px; }
.profile-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.profile-item { background: #f8fafb; border-radius: 11px; padding: 12px; }
.profile-item small { display: block; color: var(--muted); margin-bottom: 5px; }
.timeline { display: grid; gap: 12px; }
.timeline-item { border-left: 3px solid var(--primary); padding: 2px 0 2px 14px; }
.timeline-item h4 { margin: 0 0 4px; }
.timeline-item p { margin: 4px 0; }
.progress { height: 9px; border-radius: 999px; background: #e3ebed; overflow: hidden; }
.progress > span { display: block; height: 100%; background: var(--primary); }
.pagination { display: flex; gap: 5px; padding: 15px 0 0; }
.pagination a { min-width: 34px; height: 34px; display: grid; place-items: center; border-radius: 8px; background: #fff; border: 1px solid var(--border); }
.pagination a.active { background: var(--primary); color: #fff; }
.callout { padding: 14px; border-left: 4px solid var(--accent); background: #fffaf0; border-radius: 8px; }
.report-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 15px; margin-bottom: 20px; }
.report-title h2 { margin: 0 0 5px; }
.chart-bars { display: grid; gap: 12px; }
.chart-row { display: grid; grid-template-columns: 140px 1fr 45px; align-items: center; gap: 10px; }
.chart-track { height: 12px; border-radius: 999px; background: #edf2f3; overflow: hidden; }
.chart-fill { height: 100%; border-radius: inherit; background: var(--primary); }
.install-body, .login-body { min-height: 100vh; display: grid; place-items: center; background: radial-gradient(circle at top left, #dff1ee, #f5f8f8 55%); padding: 24px; }
.install-shell { width: min(850px, 100%); }
.install-brand { display: flex; align-items: center; gap: 12px; margin: 0 auto 18px; width: fit-content; }
.install-brand h1 { margin: 0; }
.install-brand p { margin: 3px 0 0; color: var(--muted); }
.install-card { padding: 28px; }
.install-card h2 { margin-top: 0; }
.success-icon { margin: 0 auto 12px; width: 62px; height: 62px; display: grid; place-items: center; border-radius: 50%; background: var(--success-soft); color: var(--success); font-size: 2rem; font-weight: 900; }
.login-card { width: min(430px, 100%); padding: 30px; }
.login-card .brand { justify-content: center; color: var(--text); padding-bottom: 25px; }
.login-card .brand small { color: var(--muted); }
.login-card h1 { font-size: 1.45rem; text-align: center; margin: 0 0 6px; }
.login-card > p { text-align: center; margin: 0 0 22px; color: var(--muted); }
.sidebar-overlay { display: none; }
.mobile-only { display: none; }

@media (max-width: 1100px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .grid-equal { grid-template-columns: 1fr; }
  .profile-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .sidebar { transform: translateX(-100%); transition: transform .2s ease; }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.show { display: block; position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 25; }
  .main-area { margin-left: 0; width: 100%; }
  .topbar { padding: 12px 16px; height: 72px; }
  .topbar h1 { font-size: 1.15rem; }
  .content-area { padding: 16px; }
  .mobile-only { display: inline-block; }
  .topbar { justify-content: flex-start; gap: 12px; }
  .top-actions { margin-left: auto; }
  .profile-chip b { display: none; }
  .stats-grid, .grid-3 { grid-template-columns: 1fr; }
  .form-grid, .form-grid.two { grid-template-columns: 1fr; }
  .form-grid .span-2, .form-grid .span-3 { grid-column: auto; }
  .profile-grid { grid-template-columns: 1fr; }
  .panel-header, .page-actions { align-items: stretch; flex-direction: column; }
  .search-form input, .search-form select { width: 100%; }
  .chart-row { grid-template-columns: 100px 1fr 35px; }
}
@media print {
  .sidebar, .topbar, .page-actions, .no-print, .sidebar-overlay { display: none !important; }
  .main-area { margin: 0; width: 100%; }
  .content-area { padding: 0; max-width: none; }
  .panel { box-shadow: none; border-color: #bbb; }
  body { background: #fff; font-size: 12px; }
}