:root {
  --ink: #1d2733;
  --muted: #5d6b7a;
  --line: #d9dee5;
  --bg: #f4f6f8;
  --card: #ffffff;
  --primary: #0a6e8a;
  --primary-ink: #ffffff;
  --danger-bg: #fdecec;
  --danger: #a32d2d;
  --ok-bg: #e8f5ec;
  --ok: #1e6b3a;
  --radius: 8px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font: 16px/1.5 var(--font); color: var(--ink); background: var(--bg); }
a { color: var(--primary); }
h1 { font-size: 1.5rem; margin: 0 0 .75rem; }
h2 { font-size: 1.1rem; margin: 0 0 .5rem; }
.muted { color: var(--muted); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.topbar { display: flex; align-items: center; gap: 1.5rem; padding: .6rem 1.25rem; background: var(--card); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; }
.nav a { margin-right: 1rem; text-decoration: none; }
.user { margin-left: auto; display: flex; gap: 1rem; align-items: center; }
.inline { display: inline; }
button.link { background: none; border: 0; color: var(--primary); cursor: pointer; font: inherit; padding: 0; text-decoration: underline; }

.content { max-width: 1100px; margin: 1.5rem auto; padding: 0 1.25rem; }
.card-page { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem; width: 100%; max-width: 420px; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.25rem; margin-bottom: 1rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

label { display: block; font-weight: 600; margin: .75rem 0 .25rem; }
input, select { width: 100%; padding: .55rem .65rem; border: 1px solid var(--line); border-radius: 6px; font: inherit; background: #fff; }
input:focus, select:focus, button:focus-visible, a:focus-visible { outline: 3px solid #9ad1e0; outline-offset: 1px; }
.btn { display: inline-block; margin-top: 1rem; padding: .6rem 1rem; border-radius: 6px; border: 1px solid var(--line); background: #fff; font: inherit; cursor: pointer; }
.btn-primary { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); }
.btn-block { width: 100%; text-align: left; margin-top: 0; }
.form-inline { display: grid; grid-template-columns: 1fr 1fr auto; gap: .75rem; align-items: end; }
.form-inline label { margin-top: 0; }
@media (max-width: 640px) { .form-inline { grid-template-columns: 1fr; } }

.alert { padding: .6rem .8rem; border-radius: 6px; margin: .5rem 0 1rem; }
.alert ul { margin: 0; padding-left: 1.2rem; }
.alert-error { background: var(--danger-bg); color: var(--danger); }
.alert-success { background: var(--ok-bg); color: var(--ok); }

.table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 1rem; }
.table th, .table td { text-align: left; padding: .55rem .75rem; border-bottom: 1px solid var(--line); }
.table th { font-size: .85rem; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
.choice-list { list-style: none; padding: 0; margin: 0 0 1rem; display: grid; gap: .5rem; }
.compact { columns: 2; margin: .5rem 0; padding-left: 1.2rem; font-size: .9rem; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: .25rem .75rem; margin: 0; }
dt { color: var(--muted); }
dd { margin: 0; }
.debug { font-size: .8rem; white-space: pre-wrap; background: #f8f8f8; padding: .75rem; border-radius: 6px; overflow: auto; }

/* ---------------------------------------------------------------- shared components added for Milestones 3–8 */
.right { text-align: right; }
.small, .tiny { font-size: .85rem; color: var(--muted); }
.tiny { font-size: .75rem; }
.danger { color: var(--danger); }
.muted { color: var(--muted); }
.actions { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.field { margin-bottom: .75rem; }
.field-error { color: var(--danger); font-size: .85rem; margin: .25rem 0 0; }
.form-stacked label { margin-top: .75rem; }
.filters, .billing-filters, .billing-filter-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: .5rem .75rem; align-items: end; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: .75rem 1rem; margin-bottom: 1rem; }
.filters label, .billing-filters label, .billing-filter-grid label { margin-top: 0; font-size: .85rem; }
.subnav, .billing-subnav, .settings-tabs, .patient-tabs, .view-switch { display: flex; flex-wrap: wrap; gap: .25rem; margin: 0 0 1rem; padding: 0; list-style: none; }
.subnav a, .billing-subnav a, .settings-tabs a, .patient-tabs a, .view-switch a, .view-switch button { display: inline-block; padding: .4rem .75rem; border: 1px solid var(--line); border-radius: 999px; background: var(--card); text-decoration: none; color: var(--ink); font: inherit; cursor: pointer; }
.subnav a[aria-current], .billing-subnav a[aria-current], .settings-tabs a[aria-current], .patient-tabs a[aria-current], .view-switch a[aria-current], .view-switch .active { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); }
.table-wrap, .table-scroll { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); }
.data-table th, .data-table td { padding: .5rem .7rem; border-bottom: 1px solid var(--line); text-align: left; }
.pagination, .billing-pager { display: flex; gap: .5rem; align-items: center; margin: 1rem 0; }
.badge { display: inline-block; padding: .1rem .5rem; border-radius: 999px; font-size: .75rem; background: #e8ecf1; color: var(--ink); white-space: nowrap; }
.badge-danger, .badge-void, .badge-cancelled, .badge-no_show, .badge-failed, .badge-terminated, .badge-expired { background: var(--danger-bg); color: var(--danger); }
.badge-muted, .badge-draft, .badge-archived { background: #eef0f3; color: var(--muted); }
.badge-success, .badge-paid, .badge-completed, .badge-active, .badge-signed, .badge-sent, .badge-delivered { background: var(--ok-bg); color: var(--ok); }
.badge-warning, .badge-partially_paid, .badge-pending, .badge-issued, .badge-scheduled, .badge-review { background: #fff4d6; color: #7a5200; }
.status-warn, .warn { color: #7a5200; }
.status-ok { color: var(--ok); }
.medical-alert { background: var(--danger-bg); color: var(--danger); border: 1px solid #f3b4b4; border-left: 6px solid var(--danger); border-radius: var(--radius); padding: .75rem 1rem; margin: 0 0 1rem; font-weight: 600; }
.medical-alert ul { margin: .25rem 0 0; padding-left: 1.2rem; font-weight: 400; }
.money-negative { color: var(--danger); }
.big { font-size: 1.6rem; font-weight: 700; }
.code-block, .secret { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: #f3f4f6; padding: .5rem .75rem; border-radius: 6px; word-break: break-all; }
.timeline { list-style: none; padding: 0; margin: 0; border-left: 2px solid var(--line); }
.timeline li { padding: .4rem 0 .4rem 1rem; position: relative; }
.timeline li::before { content: ""; position: absolute; left: -7px; top: .9rem; width: 12px; height: 12px; border-radius: 50%; background: var(--primary); }
.note { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: .75rem 1rem; margin-bottom: .75rem; }
.note.superseded { opacity: .6; border-style: dashed; }
.note-body { white-space: pre-wrap; }
.unread { font-weight: 600; }
.list { list-style: none; padding: 0; margin: 0; }
.list li { padding: .5rem 0; border-bottom: 1px solid var(--line); }
.btn-wide { width: 100%; }
.btn.danger, .billing-void { background: var(--danger); color: #fff; border-color: var(--danger); }
.ai-disclaimer, .billing-nonfiscal { background: #fff4d6; color: #7a5200; border: 1px solid #f2d58a; border-radius: var(--radius); padding: .6rem .9rem; margin: .5rem 0 1rem; font-size: .9rem; }
.swatch { display: inline-block; width: 1rem; height: 1rem; border-radius: 3px; border: 1px solid var(--line); vertical-align: middle; margin-right: .3rem; }
.doc-preview { max-width: 100%; max-height: 320px; border: 1px solid var(--line); border-radius: 6px; }
.hours-table td input { width: auto; }

/* calendar */
.calendar { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.calendar-nav, .calendar-range { display: flex; gap: .5rem; align-items: center; margin-bottom: .75rem; flex-wrap: wrap; }
.calendar-grid { display: grid; grid-template-columns: 70px repeat(var(--cal-cols, 1), minmax(140px, 1fr)); overflow-x: auto; }
.calendar-grid > * { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); min-height: 2rem; }
.cal-time { font-size: .75rem; color: var(--muted); padding: .2rem .4rem; background: #fafbfc; }
.cal-slot { position: relative; min-height: 1.5rem; }
.cal-slot.outside-hours { background: #f6f7f9; }
.cal-slot.cal-book { cursor: pointer; }
.cal-slot.cal-book:hover { background: #eaf6fa; }
.cal-appt, .appt { display: block; background: #e3f1f6; border-left: 4px solid var(--primary); border-radius: 4px; padding: .2rem .4rem; margin: 2px; font-size: .8rem; text-decoration: none; color: var(--ink); }
.cal-appt-time { font-weight: 600; margin-right: .3rem; }
.cal-list { list-style: none; padding: 0; margin: 0; }
.calendar-month { display: grid; grid-template-columns: repeat(7, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.cal-day { background: var(--card); min-height: 90px; padding: .25rem .4rem; font-size: .8rem; }
.cal-day.cal-other-month { background: #f6f7f9; color: var(--muted); }
.cal-day.cal-today { outline: 2px solid var(--primary); outline-offset: -2px; }
.cal-day-number { font-weight: 600; }
.slot { font-size: .8rem; }

/* odontogram and perio */
.odontogram-svg { width: 100%; max-width: 720px; height: auto; }
.odontogram-svg .tooth { cursor: pointer; }
.odontogram-svg .tooth.selected .surface, .odontogram-svg .tooth.selected .surf { stroke: var(--primary); stroke-width: 2; }
.odontogram-svg .surface, .odontogram-svg .surf { fill: #fff; stroke: #9aa5b1; }
.dentition-toggle, .surface-picks { display: flex; gap: .5rem; flex-wrap: wrap; margin: .5rem 0; }
.perio-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: .25rem; }
.perio-grid input, .perio-site input { width: 100%; padding: .25rem; font-size: .85rem; }
.perio-site.bleeding { background: var(--danger-bg); }

/* billing */
.billing-lines td input { width: 100%; }
.billing-suggest { position: absolute; z-index: 5; background: var(--card); border: 1px solid var(--line); border-radius: 6px; list-style: none; margin: 0; padding: .25rem 0; max-height: 220px; overflow: auto; }
.billing-suggest li { padding: .35rem .75rem; cursor: pointer; }
.billing-suggest li:hover { background: #eaf6fa; }
.billing-plan-items, .billing-check, .billing-actions { margin: .75rem 0; }
.billing-invoice-form { position: relative; }

/* charts, analytics, platform, portal */
.charts { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.chart svg { width: 100%; height: auto; }
.heat-wrap { overflow-x: auto; }
.heatmap td { text-align: center; min-width: 2rem; }
.branch-selector { display: inline-block; margin-left: .5rem; }
.branch-selector select { width: auto; padding: .3rem .5rem; }
.branch-checks label { display: inline-block; margin-right: 1rem; font-weight: 400; }
.assign-row { display: flex; gap: .5rem; align-items: end; }
.contract-preview { background: #fff; border: 1px solid var(--line); padding: 1.5rem; max-height: 70vh; overflow: auto; }
body.portal .content { max-width: 720px; }
.portal-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.25rem; margin-bottom: 1rem; }
.notification-bell { position: relative; text-decoration: none; }
.notification-bell [data-notification-count]:not(:empty) { position: absolute; top: -.5rem; right: -.7rem; background: var(--danger); color: #fff; border-radius: 999px; font-size: .7rem; padding: 0 .35rem; }