:root {
  --bk-navy: #111c3a;
  --bk-navy-soft: #263765;
  --bk-blue: #2563eb;
  --bk-indigo: #4f46e5;
  --bk-teal: #0f9f95;
  --bk-orange: #f59e0b;
  --bk-red: #dc2626;
  --bk-green: #16a34a;
  --bk-ink: #14213d;
  --bk-muted: #68738c;
  --bk-line: #e6eaf1;
  --bk-paper: #fff;
  --bk-canvas: #f4f6fa;
  --bk-radius: 18px;
  --bk-shadow: 0 12px 32px rgba(20, 33, 61, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--bk-ink);
  background: var(--bk-canvas);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-width: 320px;
}

button, input, select, textarea { font: inherit; }
button, select { cursor: pointer; }
a { color: inherit; text-decoration: none; }

.bk-shell { display: grid; grid-template-columns: 270px minmax(0, 1fr); min-height: 100vh; }
.bk-sidebar {
  position: sticky;
  top: 0;
  z-index: 30;
  height: 100vh;
  padding: 0 14px 22px;
  overflow-y: auto;
  background: var(--bk-paper);
  border-right: 1px solid var(--bk-line);
  box-shadow: 8px 0 26px rgba(15, 23, 42, .04);
}

.bk-brand {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 11px;
  height: 84px;
  padding: 12px 8px;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
}
.bk-brand img { width: 51px; height: 57px; object-fit: contain; }
.bk-brand-copy { min-width: 0; }
.bk-brand-copy strong { display: block; font-size: 14px; line-height: 1.3; }
.bk-brand-copy span { display: block; margin-top: 3px; color: var(--bk-muted); font-size: 10px; font-weight: 750; }

.bk-role-card {
  position: relative;
  overflow: hidden;
  margin: 3px 2px 19px;
  padding: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--bk-navy), #30467f);
  border-radius: 16px;
}
.bk-role-card::after {
  content: "";
  position: absolute;
  right: -23px;
  bottom: -34px;
  width: 90px;
  height: 90px;
  border: 18px solid rgba(255,255,255,.07);
  border-radius: 50%;
}
.bk-role-card small { display: block; color: #aebce1; font-size: 9px; font-weight: 900; letter-spacing: 1.2px; text-transform: uppercase; }
.bk-role-card strong { position: relative; z-index: 1; display: block; margin-top: 5px; font-size: 14px; }
.bk-role-card span { position: relative; z-index: 1; display: block; margin-top: 4px; color: #ced7f1; font-size: 10px; line-height: 1.4; }

.bk-nav-section { margin-top: 18px; }
.bk-nav-heading { padding: 0 13px 8px; color: #99a2b5; font-size: 9px; font-weight: 900; letter-spacing: 1.4px; text-transform: uppercase; }
.bk-nav-list { display: grid; gap: 4px; }
.bk-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  padding: 9px 11px;
  color: #637089;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 780;
  transition: .18s ease;
}
.bk-nav-link i { width: 22px; color: #9aa5b8; text-align: center; font-size: 14px; }
.bk-nav-link:hover { color: var(--bk-blue); background: #f1f5ff; transform: translateX(2px); }
.bk-nav-link:hover i { color: var(--bk-blue); }
.bk-nav-link.active { color: var(--bk-blue); background: linear-gradient(135deg, #eef5ff, #f0efff); box-shadow: inset 3px 0 0 var(--bk-blue); }
.bk-nav-link.active i { color: var(--bk-blue); }
.bk-nav-badge { margin-left: auto; min-width: 21px; padding: 3px 7px; color: #c2410c; background: #ffedd5; border-radius: 999px; font-size: 9px; font-weight: 900; text-align: center; }
.bk-privacy-note { margin: 22px 3px 0; padding: 13px; color: #59657c; background: #f7f9fc; border: 1px dashed #d7deea; border-radius: 14px; font-size: 10px; line-height: 1.55; }
.bk-privacy-note i { margin-right: 5px; color: var(--bk-blue); }

.bk-main { min-width: 0; }
.bk-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 78px;
  padding: 13px 30px;
  color: #fff;
  background: linear-gradient(120deg, #303f78 0%, var(--bk-indigo) 58%, #5f68da 100%);
  box-shadow: 0 10px 28px rgba(79,70,229,.16);
}
.bk-menu-button { display: none; width: 42px; height: 42px; color: #fff; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18); border-radius: 12px; }
.bk-search { display: flex; align-items: center; gap: 10px; width: min(440px, 45vw); height: 44px; padding: 0 14px; color: #dfe5ff; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.14); border-radius: 13px; }
.bk-search input { width: 100%; color: #fff; background: transparent; border: 0; outline: 0; }
.bk-search input::placeholder { color: #d2daf7; }
.bk-topbar-spacer { flex: 1; }
.bk-user { display: flex; align-items: center; gap: 10px; }
.bk-avatar { display: grid; place-items: center; width: 42px; height: 42px; color: #23305b; background: #fff; border: 2px solid rgba(255,255,255,.85); border-radius: 50%; font-weight: 900; }
.bk-user-copy strong { display: block; max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; }
.bk-user-copy span { display: block; margin-top: 2px; color: #d8dffd; font-size: 9px; }
.bk-logout { display: grid; place-items: center; width: 42px; height: 42px; color: #fff; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18); border-radius: 12px; }

.bk-overlay { display: none; }
.bk-content { padding: 30px; }
.bk-page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.bk-eyebrow { margin: 0 0 5px; color: var(--bk-blue); font-size: 10px; font-weight: 900; letter-spacing: 1.4px; text-transform: uppercase; }
.bk-page-head h1 { margin: 0; font-size: clamp(25px, 3vw, 34px); letter-spacing: -.9px; }
.bk-page-head p { max-width: 720px; margin: 8px 0 0; color: var(--bk-muted); font-size: 12px; line-height: 1.6; }
.bk-date-chip { flex: none; display: flex; align-items: center; gap: 9px; padding: 11px 14px; color: #47536b; background: var(--bk-paper); border: 1px solid var(--bk-line); border-radius: 13px; box-shadow: 0 6px 18px rgba(20,33,61,.04); font-size: 11px; font-weight: 800; }

.bk-alert { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 18px; padding: 13px 15px; border: 1px solid; border-radius: 14px; font-size: 11px; font-weight: 700; line-height: 1.5; }
.bk-alert.success { color: #166534; background: #ecfdf3; border-color: #bbf7d0; }
.bk-alert.error { color: #991b1b; background: #fff1f2; border-color: #fecdd3; }
.bk-alert.info { color: #075985; background: #eef9ff; border-color: #bae6fd; }

.bk-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-bottom: 18px; }
.bk-stat { position: relative; overflow: hidden; min-height: 146px; padding: 20px; background: var(--bk-paper); border: 1px solid var(--bk-line); border-radius: var(--bk-radius); box-shadow: var(--bk-shadow); }
.bk-stat::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--accent); }
.bk-stat-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.bk-stat-label { color: #67738b; font-size: 10px; font-weight: 900; letter-spacing: .55px; text-transform: uppercase; }
.bk-stat-value { margin-top: 12px; color: #17213d; font-size: 30px; line-height: 1; font-weight: 900; }
.bk-stat-icon { display: grid; place-items: center; width: 45px; height: 45px; color: var(--accent); background: #eff4ff; border-radius: 14px; }
.bk-stat-foot { margin-top: 13px; color: var(--bk-muted); font-size: 10px; line-height: 1.45; }

.bk-dashboard-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(310px, .8fr); gap: 18px; }
.bk-panel { min-width: 0; margin-bottom: 18px; background: var(--bk-paper); border: 1px solid var(--bk-line); border-radius: var(--bk-radius); box-shadow: var(--bk-shadow); }
.bk-panel-header { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 18px 20px; border-bottom: 1px solid var(--bk-line); }
.bk-panel-title h2 { margin: 0; font-size: 14px; }
.bk-panel-title p { margin: 5px 0 0; color: var(--bk-muted); font-size: 10px; line-height: 1.4; }
.bk-panel-body { padding: 18px 20px 20px; }
.bk-panel-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }

.bk-btn { display: inline-flex; align-items: center; justify-content: center; gap: 7px; min-height: 38px; padding: 8px 13px; border: 1px solid transparent; border-radius: 11px; font-size: 10px; font-weight: 900; transition: .18s ease; }
.bk-btn:hover { transform: translateY(-1px); }
.bk-btn-primary { color: #fff; background: linear-gradient(135deg, var(--bk-blue), var(--bk-indigo)); box-shadow: 0 8px 18px rgba(37,99,235,.2); }
.bk-btn-soft { color: var(--bk-blue); background: #eff6ff; border-color: #dbe8ff; }
.bk-btn-success { color: #166534; background: #ecfdf3; border-color: #bbf7d0; }
.bk-btn-danger { color: #991b1b; background: #fff1f2; border-color: #fecdd3; }
.bk-btn-sm { min-height: 31px; padding: 6px 9px; font-size: 9px; border-radius: 9px; }

.bk-filter { display: grid; grid-template-columns: minmax(180px, 1fr) repeat(2, minmax(145px, 190px)) auto; gap: 10px; align-items: end; }
.bk-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.bk-form-grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.bk-field { min-width: 0; }
.bk-field.span-2 { grid-column: span 2; }
.bk-field.span-3 { grid-column: span 3; }
.bk-field label { display: block; margin: 0 0 6px; color: #46526a; font-size: 10px; font-weight: 850; }
.bk-field label .required { color: var(--bk-red); }
.bk-control { width: 100%; min-height: 42px; padding: 9px 11px; color: var(--bk-ink); background: #fff; border: 1px solid #dbe1eb; border-radius: 11px; outline: 0; transition: .15s ease; }
.bk-control:focus { border-color: #8cb0ff; box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
textarea.bk-control { min-height: 92px; resize: vertical; line-height: 1.5; }
.bk-help { display: block; margin-top: 5px; color: var(--bk-muted); font-size: 9px; line-height: 1.45; }
.bk-check { display: flex; align-items: center; gap: 8px; min-height: 42px; color: #46526a; font-size: 10px; font-weight: 750; }
.bk-check input { width: 16px; height: 16px; accent-color: var(--bk-blue); }

.bk-table-wrap { overflow-x: auto; }
.bk-table { width: 100%; border-collapse: collapse; font-size: 10px; }
.bk-table th { padding: 11px 10px; color: #68738c; background: #f7f9fc; border-bottom: 1px solid var(--bk-line); text-align: left; font-size: 9px; font-weight: 900; letter-spacing: .4px; text-transform: uppercase; white-space: nowrap; }
.bk-table td { padding: 12px 10px; border-bottom: 1px solid #edf0f5; vertical-align: top; line-height: 1.45; }
.bk-table tbody tr:hover { background: #fbfcff; }
.bk-table tbody tr:last-child td { border-bottom: 0; }
.bk-person { display: flex; align-items: center; gap: 10px; min-width: 190px; }
.bk-person-avatar { flex: none; display: grid; place-items: center; width: 36px; height: 36px; color: #365189; background: #edf3ff; border-radius: 11px; font-size: 10px; font-weight: 900; }
.bk-person strong, .bk-person span { display: block; }
.bk-person strong { color: #1e2944; font-size: 11px; }
.bk-person span { margin-top: 3px; color: var(--bk-muted); font-size: 9px; }
.bk-muted { color: var(--bk-muted); }
.bk-number { font-size: 14px; font-weight: 900; }

.bk-badge { display: inline-flex; align-items: center; gap: 5px; width: fit-content; padding: 5px 8px; border-radius: 999px; font-size: 8px; font-weight: 900; letter-spacing: .3px; text-transform: uppercase; white-space: nowrap; }
.bk-badge.info { color: #1d4ed8; background: #dbeafe; }
.bk-badge.success { color: #147b50; background: #dcfce7; }
.bk-badge.warning { color: #a15c07; background: #fff1d6; }
.bk-badge.danger { color: #b42318; background: #fee4e2; }
.bk-badge.neutral { color: #536179; background: #edf1f6; }

.bk-student-list, .bk-agenda-list { display: grid; gap: 10px; }
.bk-student-row { display: grid; grid-template-columns: minmax(180px, 1fr) .65fr .7fr auto; align-items: center; gap: 12px; padding: 12px; border: 1px solid #edf0f5; border-radius: 14px; transition: .18s ease; }
.bk-student-row:hover { border-color: #cbd9f7; background: #fbfcff; transform: translateY(-1px); }
.bk-mini-metric strong { display: block; font-size: 11px; }
.bk-mini-metric span { display: block; margin-top: 3px; color: var(--bk-muted); font-size: 9px; }

.bk-chart { display: flex; align-items: flex-end; gap: 9px; height: 165px; padding: 10px 2px 0; border-bottom: 1px solid var(--bk-line); }
.bk-chart-col { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; gap: 7px; height: 100%; min-width: 18px; }
.bk-chart-bar { width: min(31px, 72%); min-height: 3px; background: linear-gradient(180deg, #6882ef, var(--bk-blue)); border-radius: 8px 8px 3px 3px; box-shadow: 0 7px 14px rgba(37,99,235,.14); }
.bk-chart-col span { color: var(--bk-muted); font-size: 8px; font-weight: 800; }

.bk-agenda-item { display: grid; grid-template-columns: 48px minmax(0,1fr); gap: 11px; padding-bottom: 12px; border-bottom: 1px solid #eef1f5; }
.bk-agenda-item:last-child { padding-bottom: 0; border-bottom: 0; }
.bk-agenda-time { color: var(--bk-blue); font-size: 10px; font-weight: 900; }
.bk-agenda-copy strong { display: block; font-size: 10px; line-height: 1.4; }
.bk-agenda-copy span { display: block; margin-top: 4px; color: var(--bk-muted); font-size: 9px; line-height: 1.45; }

.bk-quick-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.bk-quick { min-height: 100px; padding: 14px; color: #35415b; background: #f8faff; border: 1px solid #e8edf7; border-radius: 14px; transition: .18s ease; }
.bk-quick:hover { color: var(--bk-blue); background: #f1f5ff; border-color: #cedbfa; transform: translateY(-2px); }
.bk-quick i { display: grid; place-items: center; width: 34px; height: 34px; margin-bottom: 11px; color: var(--bk-blue); background: #e7efff; border-radius: 10px; }
.bk-quick strong { display: block; font-size: 10px; }

.bk-empty { padding: 34px 20px; color: var(--bk-muted); text-align: center; }
.bk-empty i { display: block; margin-bottom: 10px; color: #b4bece; font-size: 27px; }
.bk-empty strong { display: block; color: #526077; font-size: 12px; }
.bk-empty span { display: block; margin-top: 5px; font-size: 10px; }

.bk-details summary { color: var(--bk-blue); font-size: 9px; font-weight: 850; cursor: pointer; }
.bk-details-content { margin-top: 8px; padding: 10px; color: #455169; background: #f7f9fc; border: 1px solid #e7ebf2; border-radius: 9px; font-size: 9px; line-height: 1.55; white-space: pre-line; }
.bk-confidential { padding: 12px; color: #594421; background: #fff9e9; border: 1px solid #f8e4aa; border-radius: 12px; }
.bk-confidential strong { display: block; margin-bottom: 5px; font-size: 10px; }
.bk-confidential p { margin: 0; font-size: 9px; line-height: 1.55; }

.bk-inline-form { display: flex; align-items: center; gap: 6px; min-width: 250px; }
.bk-inline-form .bk-control { min-height: 32px; padding: 5px 7px; font-size: 9px; }
.bk-inline-form select { max-width: 110px; }
.bk-table-caption { margin: 0 0 13px; color: var(--bk-muted); font-size: 10px; }

.bk-report-head { display: none; }
.bk-report-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 18px; }
.bk-report-card { padding: 16px; background: #f8faff; border: 1px solid #e4eaf5; border-radius: 14px; }
.bk-report-card span { display: block; color: var(--bk-muted); font-size: 9px; font-weight: 800; text-transform: uppercase; }
.bk-report-card strong { display: block; margin-top: 7px; font-size: 24px; }

.bk-footer { padding: 16px 30px 26px; color: #8a94a7; text-align: center; font-size: 9px; }

.bk-login-page { min-height: 100vh; padding: 28px; background: radial-gradient(circle at 15% 20%, rgba(37,99,235,.2), transparent 35%), linear-gradient(135deg, #101b39, #283d77 58%, #4f46e5); }
.bk-login-shell { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(360px, 470px); min-height: calc(100vh - 56px); overflow: hidden; background: #fff; border-radius: 26px; box-shadow: 0 28px 90px rgba(4,9,27,.3); }
.bk-login-intro { position: relative; overflow: hidden; display: flex; flex-direction: column; justify-content: flex-end; min-height: 620px; padding: 58px; color: #fff; background: linear-gradient(145deg, rgba(9,20,54,.92), rgba(49,60,139,.88)), url('../../branding/logo-sekolah.png') center 22% / 230px auto no-repeat; }
.bk-login-intro::before, .bk-login-intro::after { content: ""; position: absolute; border: 28px solid rgba(255,255,255,.06); border-radius: 50%; }
.bk-login-intro::before { top: -90px; right: -70px; width: 240px; height: 240px; }
.bk-login-intro::after { bottom: -130px; left: -100px; width: 300px; height: 300px; }
.bk-login-intro > * { position: relative; z-index: 1; }
.bk-login-intro .bk-eyebrow { color: #a9c3ff; }
.bk-login-intro h1 { max-width: 600px; margin: 0; font-size: clamp(36px, 5vw, 62px); line-height: 1.02; letter-spacing: -2px; }
.bk-login-intro p { max-width: 580px; margin: 20px 0 0; color: #d2dbf4; font-size: 14px; line-height: 1.7; }
.bk-login-features { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.bk-login-features span { padding: 8px 11px; color: #dbe6ff; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.12); border-radius: 999px; font-size: 10px; font-weight: 800; }
.bk-login-panel { display: flex; align-items: center; padding: 52px; }
.bk-login-card { width: 100%; }
.bk-login-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 34px; }
.bk-login-logo img { width: 62px; height: 68px; object-fit: contain; }
.bk-login-logo strong { display: block; font-size: 15px; }
.bk-login-logo span { display: block; margin-top: 4px; color: var(--bk-muted); font-size: 10px; }
.bk-login-card h2 { margin: 0; font-size: 28px; letter-spacing: -.7px; }
.bk-login-card > p { margin: 8px 0 26px; color: var(--bk-muted); font-size: 11px; line-height: 1.6; }
.bk-login-card .bk-field { margin-bottom: 15px; }
.bk-login-submit { width: 100%; min-height: 46px; margin-top: 6px; }
.bk-login-foot { margin-top: 25px; color: #95a0b4; text-align: center; font-size: 9px; }

@media (max-width: 1180px) {
  .bk-shell { grid-template-columns: 245px minmax(0, 1fr); }
  .bk-stats { grid-template-columns: repeat(2, 1fr); }
  .bk-dashboard-grid { grid-template-columns: 1fr; }
  .bk-report-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .bk-shell { display: block; }
  .bk-sidebar { position: fixed; left: -285px; width: 270px; transition: .24s ease; }
  .bk-sidebar.open { left: 0; }
  .bk-overlay { position: fixed; inset: 0; z-index: 25; display: block; background: rgba(15,23,42,.42); opacity: 0; pointer-events: none; transition: .24s ease; }
  .bk-overlay.show { opacity: 1; pointer-events: auto; }
  .bk-menu-button { display: block; }
  .bk-topbar { padding: 12px 16px; }
  .bk-search { display: none; }
  .bk-content { padding: 22px 16px; }
  .bk-page-head { align-items: flex-start; flex-direction: column; }
  .bk-filter, .bk-form-grid.cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bk-field.span-3 { grid-column: span 2; }
  .bk-login-page { padding: 0; }
  .bk-login-shell { grid-template-columns: 1fr; min-height: 100vh; border-radius: 0; }
  .bk-login-intro { display: none; }
}

@media (max-width: 560px) {
  .bk-user-copy { display: none; }
  .bk-logout { width: 39px; height: 39px; }
  .bk-stats, .bk-form-grid, .bk-form-grid.cols-3, .bk-report-grid { grid-template-columns: 1fr; }
  .bk-field.span-2, .bk-field.span-3 { grid-column: auto; }
  .bk-stat { min-height: 126px; }
  .bk-student-row { grid-template-columns: minmax(0, 1fr) auto; }
  .bk-student-row .bk-mini-metric:first-of-type { display: none; }
  .bk-filter { grid-template-columns: 1fr; }
  .bk-panel-header { align-items: flex-start; flex-direction: column; }
  .bk-panel-actions { width: 100%; }
  .bk-quick-grid { grid-template-columns: 1fr 1fr; }
  .bk-login-panel { padding: 34px 22px; }
}

@media print {
  body { background: #fff; }
  .bk-sidebar, .bk-topbar, .bk-page-head, .bk-alert, .bk-footer, .bk-no-print { display: none !important; }
  .bk-shell { display: block; }
  .bk-content { padding: 0; }
  .bk-panel { box-shadow: none; border-color: #d5dae3; break-inside: avoid; }
  .bk-report-head { display: block; margin-bottom: 18px; }
  .bk-report-head h1 { margin: 0; font-size: 20px; }
  .bk-report-head p { margin: 5px 0 0; color: #555; font-size: 10px; }
}