:root {
  color-scheme: dark;
  --bg: #07110f;
  --panel: #101b18;
  --panel-2: #14231f;
  --line: #263732;
  --text: #f4f8f6;
  --muted: #98aaa4;
  --lime: #b7ff3c;
  --lime-dark: #7eb91f;
  --danger: #ff6b67;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 80% 0%, rgba(183, 255, 60, 0.08), transparent 34%), var(--bg);
  color: var(--text);
  font: 16px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
button, input, select { font: inherit; }
button { cursor: pointer; }
.topbar {
  min-height: 84px;
  padding: 16px clamp(20px, 4vw, 64px);
  display: flex;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 17, 15, 0.88);
  backdrop-filter: blur(18px);
  position: sticky;
  top: 0;
  z-index: 5;
}
.brand-mark {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--lime);
  color: #07110f;
  font-weight: 900;
  font-size: 24px;
  transform: skew(-7deg);
}
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: 18px; }
.eyebrow, .step { margin-bottom: 2px; font-size: 11px; font-weight: 800; letter-spacing: 0.18em; color: var(--muted); }
.lime, .step { color: var(--lime); }
.header-status { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.environment { padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 13px; }
.environment span { display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 16px var(--lime); }
.mode-badge { padding: 8px 12px; border-radius: 999px; color: #c5d2ce; background: #14231f; font-size: 13px; font-weight: 700; }
.mode-badge.walk-in { color: #07110f; background: var(--lime); }
.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 48px 0 72px; }
.hero { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.hero h2 { max-width: 720px; margin-bottom: 8px; font-size: clamp(34px, 5vw, 62px); line-height: 1.03; letter-spacing: -0.05em; }
.hero p:last-child { color: var(--muted); }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.ops-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
.metric-card { min-height: 126px; padding: 19px; border: 1px solid var(--line); border-radius: 16px; background: rgba(16, 27, 24, .92); }
.metric-card strong { display: block; margin: 9px 0 4px; font-size: 24px; line-height: 1.15; }
.metric-card small { color: var(--muted); }
.panel { border: 1px solid var(--line); border-radius: 20px; background: linear-gradient(145deg, rgba(20, 35, 31, 0.96), rgba(12, 24, 21, 0.96)); box-shadow: var(--shadow); padding: 24px; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.panel-heading h3, .result-panel h3 { margin-bottom: 0; font-size: 23px; letter-spacing: -0.03em; }
.counter { min-width: 36px; height: 36px; padding: 0 10px; display: grid; place-items: center; border-radius: 12px; background: rgba(183, 255, 60, 0.1); color: var(--lime); font-weight: 800; }
label { display: block; margin-bottom: 8px; color: var(--muted); font-size: 13px; font-weight: 700; }
select, input { width: 100%; border: 1px solid #31443e; border-radius: 13px; background: #091512; color: var(--text); outline: none; }
select { min-height: 52px; padding: 0 14px; }
input { min-height: 54px; padding: 0 16px; font-size: 18px; }
select:focus, input:focus { border-color: var(--lime); box-shadow: 0 0 0 4px rgba(183, 255, 60, 0.1); }
.class-details { margin-top: 16px; min-height: 54px; }
.detail-row { display: flex; flex-wrap: wrap; gap: 8px; }
.pill { padding: 7px 10px; border-radius: 9px; background: #091512; color: #c5d2ce; font-size: 13px; }
.scan-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.primary-button, .ghost-button, .danger-button { min-height: 46px; padding: 0 18px; border-radius: 12px; font-weight: 800; }
.primary-button { border: 0; background: var(--lime); color: #07110f; }
.primary-button:hover { background: #c9ff70; }
.ghost-button { border: 1px solid var(--line); background: transparent; color: var(--text); }
.danger-button { border: 1px solid rgba(255, 107, 103, 0.42); background: rgba(255, 107, 103, 0.1); color: #ffaaa7; }
.scanner-icon { font-size: 34px; color: var(--lime); }
.hint { margin: 12px 0 0; color: var(--muted); font-size: 13px; }
.hint button { padding: 0; border: 0; background: none; color: var(--lime); }
.result-panel { margin-top: 20px; display: grid; grid-template-columns: auto 1fr auto; gap: 20px; align-items: center; }
.result-icon { width: 58px; height: 58px; display: grid; place-items: center; border-radius: 18px; background: rgba(183, 255, 60, 0.12); color: var(--lime); font-size: 28px; font-weight: 900; }
.result-copy p { margin-bottom: 0; color: var(--muted); }
.result-actions { display: flex; gap: 10px; }
.result-panel.error .result-icon, .result-panel.no-show .result-icon { background: rgba(255, 107, 103, 0.12); color: var(--danger); }
.result-panel.walk-in .result-icon { background: rgba(85, 195, 255, 0.14); color: #7bd3ff; }
.result-panel.duplicate .result-icon { background: rgba(255, 207, 89, 0.12); color: #ffcf59; }
.sync-notice { margin-top: 8px !important; color: #d7c98a !important; font-size: 13px; }
.roster-panel { margin-top: 20px; }
.attendance-list { display: grid; gap: 10px; }
.attendance-row { display: grid; grid-template-columns: 1fr auto auto; gap: 12px; align-items: center; padding: 13px 14px; border-radius: 12px; background: #091512; }
.attendance-row strong { display: block; }
.attendance-row small { color: var(--muted); }
.status { padding: 6px 9px; border-radius: 8px; color: var(--lime); background: rgba(183, 255, 60, 0.1); font-size: 12px; font-weight: 800; }
.status.no-show { color: #ffaaa7; background: rgba(255, 107, 103, 0.1); }
.status.unverified { color: #ffcf59; background: rgba(255, 207, 89, 0.1); }
.muted { color: var(--muted); }
.hidden { display: none !important; }
.readiness-list { display: grid; gap: 8px; margin: 12px 0 22px; }
.readiness-item { display: flex; gap: 12px; align-items: center; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; }
.readiness-item .check { width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; flex: 0 0 auto; background: rgba(255,107,103,.12); color: var(--danger); }
.readiness-item.ok .check { background: rgba(176,255,67,.12); color: var(--lime); }
.readiness-item small { display: block; color: var(--muted); }
.report-controls { display: flex; gap: 10px; align-items: center; }
.report-controls input { min-width: 160px; }
@media (max-width: 780px) {
  .ops-grid { grid-template-columns: 1fr 1fr; }
  .grid { grid-template-columns: 1fr; }
  .hero { align-items: start; flex-direction: column; }
  .result-panel { grid-template-columns: auto 1fr; }
  .result-actions { grid-column: 1 / -1; }
  .scan-row { grid-template-columns: 1fr; }
  .header-status { align-items: flex-end; flex-direction: column-reverse; }
  .mode-badge { display: none; }
}
@media (max-width: 480px) { .ops-grid { grid-template-columns: 1fr; } }
.admin-panel { margin-top: 22px; }
.admin-form { display: flex; align-items: end; flex-wrap: wrap; gap: 12px; margin: 16px 0; }
.admin-form label { flex: 1 1 170px; }
.admin-form input, #adminToken { width: 100%; margin-top: 6px; }
.admin-panel h3 { margin-top: 18px; }
.access-panel { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.access-panel h3 { margin: 2px 0 0; }
.access-actions { display: flex; align-items: center; gap: 10px; flex: 1; justify-content: flex-end; }
.access-actions input { max-width: 460px; }
@media (max-width: 780px) {
  .access-panel, .access-actions { align-items: stretch; flex-direction: column; }
  .access-actions input { max-width: none; }
}
/* Compact administration and private sign-in screen. */
.compact-section { margin-top: 18px; border: 1px solid #334155; border-radius: 12px; padding: 14px; }
.compact-section summary { cursor: pointer; font-weight: 700; padding: 4px; }
.compact-section[open] summary { margin-bottom: 16px; }
.scroll-list { max-height: 360px; overflow-y: auto; }
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card { width: min(100%, 440px); }
.login-card form { display: grid; gap: 16px; margin-top: 24px; }
.login-card input, .login-card select { width: 100%; }
/* Studio, team and statistics workspace */
[hidden], .hidden { display:none !important; }
.section-nav {display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px;}
.section-nav a {color:var(--text,#e8eef5);padding:10px 16px;background:rgba(150,170,180,.12);border-radius:8px;text-decoration:none;}
.studio-switch {display:grid;grid-template-columns:120px minmax(180px,400px) 1fr;gap:16px;align-items:center;}
.filter-grid {display:grid;grid-template-columns:repeat(auto-fit,minmax(185px,1fr));gap:16px;align-items:end;margin:20px 0;}
.filter-grid label {display:flex;flex-direction:column;gap:8px;}
.filter-grid input,.filter-grid select {width:100%;box-sizing:border-box;}
.filter-grid select[multiple] {min-height:110px;}
.table-scroll {overflow:auto;margin:18px 0;}
.data-table {width:100%;border-collapse:collapse;font-size:14px;white-space:nowrap;}
.data-table th,.data-table td {padding:13px 12px;text-align:left;border-bottom:1px solid rgba(150,170,180,.2);}
.data-table th {font-size:12px;text-transform:uppercase;letter-spacing:.05em;}
.data-table button {margin-right:8px;}
.stats-chart {display:grid;gap:12px;margin:20px 0;}
.chart-row {display:grid;grid-template-columns:minmax(100px,200px) 1fr 90px;gap:14px;align-items:center;}
.chart-track {height:14px;border-radius:4px;background:rgba(150,170,180,.18);overflow:hidden;}
.chart-fill {height:100%;background:#9fe870;border-radius:4px;}
.metric-card {min-width:0;}.metric-card strong {overflow-wrap:anywhere;}
section[id] {scroll-margin-top:25px;}
@media(max-width:700px){.studio-switch{grid-template-columns:1fr;}.chart-row{grid-template-columns:100px 1fr 60px;}.filter-grid{grid-template-columns:1fr;}}
/* Separate workspace pages */
.topbar .brand-mark{text-decoration:none;color:#07110f;flex-shrink:0;}
.header-status{margin-left:auto;display:flex;align-items:center;gap:16px;}
#userIdentity{font-size:13px;color:var(--muted);}
.logout-button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:9px 18px;border:1px solid var(--lime);border-radius:10px;background:var(--lime);color:#07110f;font-weight:800;white-space:nowrap;}
.page-nav{display:flex;flex-wrap:wrap;gap:6px;padding:12px clamp(20px,4vw,64px);border-bottom:1px solid var(--line);background:#0d1814;}
.page-nav a{color:var(--muted);text-decoration:none;padding:9px 14px;border-radius:8px;font-size:14px;}
.page-nav a:hover,.page-nav a[aria-current=page]{background:#263b24;color:var(--lime);}
#pageError{background:#391c20;color:#ffd1d1;border:1px solid #713137;padding:16px;border-radius:12px;margin:16px 0;}
.statistics-heading{padding:12px 0;}.statistics-heading h2{font-size:clamp(26px,3vw,40px);margin:8px 0;line-height:1.15;}
.date-presets{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0;}
.date-presets button{background:var(--panel-2);color:var(--text);border:1px solid var(--line);border-radius:8px;padding:9px 16px;}
.statistics-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:20px 0;}
.analytics-card strong{font-size:36px;}.metric-change{display:block;margin-top:10px;font-size:12px;}
.metric-change.positive{color:#b7ff3c;}.metric-change.negative{color:#ffaaa5;}.metric-change.neutral{color:var(--muted);}
.insight-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:20px 0;}
.insight-card{padding:20px;background:#14231f;border:1px solid var(--line);border-radius:12px;}.insight-card h4{margin:10px 0;font-size:18px;}
.chart-legend{display:flex;gap:20px;flex-wrap:wrap;margin:20px 0;font-size:12px;color:var(--muted);}
.chart-legend span:before{content:'';display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:8px;background:#778d83;}.chart-legend .legend-present:before{background:#b7ff3c;}.chart-legend .legend-walkin:before{background:#60baff;}
.comparison-chart-row{display:grid;grid-template-columns:minmax(100px,220px) 1fr 150px;gap:18px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line);font-size:13px;}
.comparison-chart-row svg{width:100%;height:48px;}.comparison-chart-row small{display:block;color:var(--muted);font-size:11px;margin-top:5px;}.chart-values{text-align:right;}
.detail-heading{display:flex;align-items:end;gap:20px;flex-wrap:wrap;margin-top:35px;}.detail-heading h3{margin-right:auto;}.detail-heading label{font-size:12px;}.detail-heading input,.detail-heading select{display:block;min-width:190px;}
@media(max-width:800px){.statistics-metrics,.insight-grid{grid-template-columns:repeat(2,minmax(0,1fr));}.comparison-chart-row{grid-template-columns:120px 1fr;}.chart-values{grid-column:2;text-align:left;}.topbar{padding:14px 16px;}.topbar h1{font-size:19px;}#userIdentity{max-width:100px;overflow-wrap:anywhere;}.header-status{gap:8px;}.page-nav{padding:10px;}}
@media(max-width:480px){.statistics-metrics,.insight-grid{grid-template-columns:1fr;}.topbar .brand-mark{display:none;}.comparison-chart-row{grid-template-columns:90px 1fr;gap:10px;}}