:root {
  --color-primary: #4a90d9;
  --color-primary-dark: #2f6ba7;
  --color-secondary: #eef4fb;
  --color-accent: #2a9d8f;
  --color-danger: #c0392b;
  --color-warning: #f4a261;
  --color-success: #2e7d32;
  --color-bg: #f6f8fb;
  --color-surface: #ffffff;
  --color-surface-muted: #f1f4f8;
  --color-text: #15202b;
  --color-text-muted: #52606d;
  --color-border: #d8e1eb;
  --radius: 1rem;
  --shadow: 0 12px 32px rgba(21, 32, 43, 0.08);
  --space-xs: .25rem;
  --space-sm: .5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --touch-size: 44px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f1722;
    --color-surface: #16202d;
    --color-surface-muted: #1c2a3a;
    --color-text: #f8fbff;
    --color-text-muted: #b7c4d2;
    --color-border: #2c3b4d;
  }
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: var(--color-bg); color: var(--color-text); }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, .button { min-height: var(--touch-size); border: 0; border-radius: .9rem; cursor: pointer; }
input, select, textarea { width: 100%; min-height: var(--touch-size); border: 1px solid var(--color-border); border-radius: .8rem; padding: .75rem 1rem; background: var(--color-surface); color: var(--color-text); }
textarea { min-height: 120px; }
label { display: grid; gap: .4rem; color: var(--color-text-muted); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; padding: .75rem 1rem; font-weight: 600; }
.button--primary { background: var(--color-primary); color: #fff; }
.button--secondary { background: var(--color-surface-muted); color: var(--color-text); }
.button--danger { background: var(--color-danger); color: #fff; }
.button--fab { inline-size: 3rem; block-size: 3rem; padding: 0; font-size: 1.5rem; }
.app-shell { display: grid; grid-template-columns: 1fr; min-height: 100vh; }
.sidebar { display: none; }
.main-content { padding: 1rem 1rem 5rem; }
.topbar, .toolbar, .toolbar__group, .brand, .chip-group, .button-row, .steps-inline { display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; }
.topbar { justify-content: space-between; margin-bottom: 1rem; }
.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1rem; }
.card--compact { padding: .85rem 1rem; }
.dashboard-grid, .stats-grid { display: grid; gap: 1rem; }
.stack { display: grid; gap: 1rem; }
.gap-lg { gap: 1.5rem; }
.section-heading h1, .section-heading p { margin: 0; }
.muted { color: var(--color-text-muted); }
.alert { border-radius: .9rem; padding: .9rem 1rem; }
.alert--danger { background: rgba(192, 57, 43, .12); color: var(--color-danger); }
.alert--success { background: rgba(46, 125, 50, .12); color: var(--color-success); }
.alert--warning { background: rgba(244, 162, 97, .16); color: #8a4b08; }
.chip { display: inline-flex; align-items: center; gap: .35rem; min-height: 2rem; border-radius: 999px; background: var(--color-surface-muted); padding: .35rem .75rem; }
.chip--active { background: var(--color-primary); color: #fff; }
.segmented-control { background: var(--color-surface-muted); padding: .25rem; border-radius: 999px; }
.segmented-control button { background: transparent; min-height: 2.5rem; padding: 0 1rem; border-radius: 999px; }
.segmented-control .is-active { background: var(--color-surface); box-shadow: 0 2px 8px rgba(0,0,0,.08); }
.brand { margin-bottom: 1.5rem; }
.brand__mark { inline-size: 3rem; block-size: 3rem; border-radius: .85rem; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); color: #fff; display: grid; place-items: center; font-weight: 800; }
.nav-list { display: grid; gap: .5rem; }
.nav-list a { padding: .8rem 1rem; border-radius: .8rem; }
.nav-list a:hover, .nav-list a:focus-visible { background: var(--color-surface-muted); }
.bottom-nav { position: fixed; inset: auto 0 0; display: grid; grid-template-columns: repeat(4, 1fr); background: var(--color-surface); border-top: 1px solid var(--color-border); z-index: 20; }
.bottom-nav a { min-height: 56px; display: grid; place-items: center; font-size: .9rem; }
.auth-body, .installer-body { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.auth-card, .installer-shell { width: min(100%, 960px); }
.form-grid { display: grid; gap: 1rem; }
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: .75rem; border-bottom: 1px solid var(--color-border); text-align: left; vertical-align: top; }
.list, .clean-list, .check-list { list-style: none; padding: 0; margin: 0; }
.list-item { display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.stat-card strong { font-size: 2rem; }
.calendar-stage { min-height: 60vh; }
.calendar-stage__header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: 1rem; }
.calendar-root { display: grid; gap: 1px; background: var(--color-border); border-radius: 1rem; overflow: hidden; }
.calendar-month { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); }
.calendar-weekdays { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); }
.calendar-weekdays span { background: var(--color-surface-muted); padding: .75rem; font-weight: 700; text-align: center; }
.calendar-cell { min-height: 7rem; padding: .5rem; background: var(--color-surface); display: grid; align-content: start; gap: .35rem; }
.calendar-cell--muted { background: color-mix(in srgb, var(--color-surface) 88%, var(--color-border)); }
.calendar-cell__date { font-size: .85rem; color: var(--color-text-muted); }
.event-chip { display: block; border-radius: .65rem; padding: .35rem .5rem; color: #fff; font-size: .8rem; }
.week-grid, .day-grid { display: grid; grid-template-columns: 72px 1fr; }
.week-grid__hours, .day-grid__hours { display: grid; }
.time-label { min-height: 3rem; padding: .25rem .5rem; color: var(--color-text-muted); border-bottom: 1px solid var(--color-border); }
.week-columns { display: grid; grid-template-columns: repeat(7, 1fr); }
.week-column, .day-column { display: grid; grid-auto-rows: 3rem; background: var(--color-surface); }
.time-slot { border-left: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); position: relative; }
.agenda-list { display: grid; gap: .75rem; }
.agenda-item { display: grid; gap: .25rem; padding: .85rem 1rem; background: var(--color-surface); }
.calendar-filter { display: flex; align-items: center; gap: .6rem; }
.color-dot { inline-size: .9rem; block-size: .9rem; border-radius: 999px; }
.progress { background: var(--color-surface-muted); border-radius: 999px; overflow: hidden; height: .75rem; }
.progress span { display: block; height: 100%; background: linear-gradient(90deg, var(--color-primary), var(--color-accent)); }
.check-list li { display: flex; justify-content: space-between; padding: .75rem 0; border-bottom: 1px solid var(--color-border); }
.toast-root { position: fixed; top: 1rem; right: 1rem; display: grid; gap: .75rem; z-index: 1000; }
.toast { min-width: 220px; padding: .9rem 1rem; border-radius: .9rem; box-shadow: var(--shadow); background: var(--color-surface); border: 1px solid var(--color-border); }
.bottom-sheet { position: fixed; inset: auto 0 0; background: var(--color-surface); border-radius: 1.5rem 1.5rem 0 0; box-shadow: var(--shadow); padding: 1rem; z-index: 1500; }
.bottom-sheet__backdrop, .modal__backdrop { position: fixed; inset: 0; background: rgba(0, 0, 0, .4); z-index: 1400; }
.modal { position: fixed; inset: 50% auto auto 50%; transform: translate(-50%, -50%); width: min(92vw, 540px); background: var(--color-surface); border-radius: 1rem; box-shadow: var(--shadow); padding: 1rem; z-index: 1500; }
.loading-spinner { inline-size: 1.25rem; block-size: 1.25rem; border-radius: 999px; border: 3px solid rgba(255,255,255,.35); border-top-color: #fff; animation: spin 1s linear infinite; }
.error-card { max-width: 32rem; margin: 5rem auto; text-align: center; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (min-width: 768px) {
  .app-shell { grid-template-columns: 280px 1fr; }
  .sidebar { display: block; padding: 1.5rem; border-right: 1px solid var(--color-border); background: var(--color-surface); }
  .bottom-nav { display: none; }
  .dashboard-grid { grid-template-columns: 280px 1fr; }
  .stats-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}