:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --line: #dfe3ea;
  --text: #172033;
  --muted: #667085;
  --accent: #1f5fbf;
  --accent-strong: #174a96;
  --danger: #b42318;
  --success: #067647;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box; }
html { min-height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

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

.topbar {
  height: 64px;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 32px;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand { font-weight: 760; color: var(--text); font-size: 18px; }
.main-nav { display: flex; gap: 4px; flex: 1; }
.main-nav a, .admin-nav a {
  color: #344054;
  padding: 8px 11px;
  border-radius: 6px;
  font-size: 14px;
}
.main-nav a.active, .main-nav a:hover, .admin-nav a:hover {
  background: #eef4ff;
  color: var(--accent);
  text-decoration: none;
}
.logout-form { display: flex; gap: 12px; align-items: center; color: var(--muted); font-size: 14px; }

.page { max-width: 1180px; margin: 0 auto; padding: 32px 24px 56px; }
.auth-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.auth-panel { width: min(430px, 100%); background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 32px; box-shadow: var(--shadow); }
.narrow { max-width: 620px; margin: 40px auto; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 28px; }

.page-header { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; margin-bottom: 24px; }
.page-header h1, h1 { margin: 0; font-size: 30px; letter-spacing: 0; }
h2 { margin: 0 0 14px; font-size: 19px; letter-spacing: 0; }
h3 { margin: 0 0 10px; }
.eyebrow { margin: 0 0 6px; color: var(--accent); text-transform: uppercase; font-size: 12px; font-weight: 720; letter-spacing: 0.04em; }
.muted { color: var(--muted); }

.button {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 6px;
  padding: 9px 14px;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
}
.button:hover { text-decoration: none; border-color: #b9c2d0; }
.button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.button.primary:hover { background: var(--accent-strong); }
.button.subtle { background: #f9fafb; }
.button.wide { width: 100%; }

.flash, .notice {
  border-radius: 6px;
  padding: 12px 14px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  background: #f9fafb;
}
.flash.success { background: #ecfdf3; border-color: #abefc6; color: var(--success); }
.flash.error, .field-error { color: var(--danger); }
.field-error { font-size: 13px; display: block; margin-top: 4px; }
.notice { background: #eef4ff; border-color: #c7d7fe; color: #1849a9; }

.form { display: grid; gap: 16px; }
.form label { display: grid; gap: 7px; font-weight: 650; font-size: 14px; }
input, select, textarea {
  width: 100%;
  border: 1px solid #cfd6e1;
  border-radius: 6px;
  padding: 10px 11px;
  font: inherit;
  color: var(--text);
  background: #fff;
}
textarea { resize: vertical; min-height: 120px; }
input:focus, select:focus, textarea:focus { outline: 2px solid #b2ccff; border-color: var(--accent); }
.grid-form { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; align-items: end; }
.inline-form { display: flex; gap: 12px; align-items: center; }
.checkbox-row { display: flex !important; grid-template-columns: none !important; flex-direction: row; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }

.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-bottom: 22px; }
.metric {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  min-height: 96px;
}
.metric span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 10px; }
.metric strong { font-size: 24px; letter-spacing: 0; }

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 22px;
}
.section-title { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 12px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 11px 12px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { background: #f8fafc; color: #475467; font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
tbody tr:hover { background: #f9fbff; }

.filter-bar { display: flex; gap: 10px; margin-bottom: 18px; align-items: center; }
.filter-bar input { flex: 1; }
.inline-search { display: flex; gap: 8px; margin: 0; }
.list-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.item-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  display: grid;
  gap: 14px;
}
.item-card h2 { margin-bottom: 6px; }
.item-card p { margin: 0; color: var(--muted); min-height: 48px; }
.meta-row { display: flex; flex-wrap: wrap; gap: 8px; }
.meta-row span { border: 1px solid var(--line); border-radius: 999px; padding: 3px 8px; color: var(--muted); font-size: 12px; }

.duration-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; }
.duration-button {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 20px 12px;
  cursor: pointer;
}
.duration-button strong { display: block; font-size: 30px; }
.duration-button span { color: var(--muted); }
.duration-button:hover { border-color: var(--accent); box-shadow: var(--shadow); }

.summary-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 0; }
.summary-list div { border: 1px solid var(--line); border-radius: 6px; padding: 12px; }
.summary-list dt { color: var(--muted); font-size: 13px; }
.summary-list dd { margin: 4px 0 0; font-weight: 700; }

.result-hero {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 30px;
  margin-bottom: 20px;
  text-align: center;
}
.result-hero span { color: var(--muted); text-transform: uppercase; font-size: 12px; font-weight: 750; }
.result-hero strong { display: block; font-size: clamp(44px, 7vw, 78px); line-height: 1; margin: 10px 0; }
.action-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.pagination { display: flex; justify-content: flex-end; gap: 12px; align-items: center; margin-top: 14px; }
.admin-nav { display: flex; gap: 4px; margin-bottom: 24px; border-bottom: 1px solid var(--line); padding-bottom: 10px; }
.preview-box { margin-top: 18px; border: 1px solid var(--line); border-radius: 8px; padding: 14px; background: #f8fafc; }
.preview-box pre { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 13px; }
.chart { width: 100%; display: block; }

@media (max-width: 900px) {
  .topbar { height: auto; min-height: 64px; flex-wrap: wrap; padding: 14px 18px; }
  .main-nav { order: 3; width: 100%; overflow-x: auto; }
  .page { padding: 24px 16px 42px; }
  .page-header { align-items: flex-start; flex-direction: column; }
  .metric-grid, .list-grid, .summary-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-form, .duration-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .metric-grid, .list-grid, .summary-list, .grid-form, .duration-grid { grid-template-columns: 1fr; }
  .filter-bar, .inline-form, .section-title { align-items: stretch; flex-direction: column; }
  .logout-form span { display: none; }
}