/* Ortho — one stylesheet, mobile first. Logical properties throughout so dir="rtl" works unchanged. */
:root {
  --bg: #f4f6f8; --surface: #ffffff; --surface-2: #eef1f4; --border: #dde3e9;
  --text: #1d2733; --muted: #5b6773; --accent: #0f766e; --accent-strong: #0b5f58; --on-accent: #ffffff;
  --ok: #15803d; --ok-bg: #e7f6ec; --warn: #9a5b00; --warn-bg: #fff4dc; --danger: #b42318; --danger-bg: #fdecea;
  --info-bg: #e6f3f2; --focus: #2563eb;
  --r-ctl: 8px; --r-card: 12px;
  --sh-1: 0 1px 2px rgb(16 24 40 / .06), 0 1px 3px rgb(16 24 40 / .08);
  --sh-2: 0 8px 24px rgb(16 24 40 / .12);
  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px; --s5: 24px; --s6: 32px; --s7: 48px;
  --gutter: 16px; --tabbar-h: 64px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1418; --surface: #182027; --surface-2: #212b34; --border: #2d3944;
    --text: #e6ecf1; --muted: #9aa7b3; --accent: #2dd4bf; --accent-strong: #5eead4; --on-accent: #062a27;
    --ok: #4ade80; --ok-bg: #12301f; --warn: #fbbf24; --warn-bg: #33270d; --danger: #f87171; --danger-bg: #3a1514;
    --info-bg: #10302d; --focus: #93c5fd;
    --sh-1: 0 1px 2px rgb(0 0 0 / .4); --sh-2: 0 8px 24px rgb(0 0 0 / .5);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text); font-family: var(--font);
  font-size: clamp(1rem, .95rem + .25vw, 1.0625rem); line-height: 1.5;
  overflow-wrap: anywhere; min-block-size: 100vh; display: flex; flex-direction: column;
}
img, svg, canvas, video { max-inline-size: 100%; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 var(--s3); }
h1 { font-size: clamp(1.6rem, 1.35rem + 1.2vw, 2.2rem); letter-spacing: -.01em; }
h2 { font-size: 1.2rem; }
p { margin: 0 0 var(--s3); }
p:last-child { margin-block-end: 0; }
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { color: var(--accent-strong); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.mono { font-family: var(--mono); font-size: .9em; }
.break { word-break: break-all; }
.visually-hidden { position: absolute !important; inline-size: 1px; block-size: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; inset-inline-start: var(--s2); inset-block-start: -100px; background: var(--surface); padding: var(--s2) var(--s3); border-radius: var(--r-ctl); z-index: 100; }
.skip:focus { inset-block-start: var(--s2); }
.inline { display: inline; }

/* Layout */
.container { inline-size: 100%; max-inline-size: 1200px; margin-inline: auto; padding-inline: max(var(--gutter), env(safe-area-inset-left)) max(var(--gutter), env(safe-area-inset-right)); }
main.container { flex: 1; padding-block: var(--s5) calc(var(--tabbar-h) + var(--s6) + env(safe-area-inset-bottom)); }
.stack > * + * { margin-block-start: var(--s4); }
.stack { display: block; }
.cols { display: grid; gap: var(--s4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); align-items: start; }
.page-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--s3); margin-block-end: var(--s4); }
.page-head h1 { margin: 0; }
.crumb { margin: 0 0 var(--s1); font-size: .9rem; }
.crumb a::before { content: "‹ "; }
.footer { color: var(--muted); font-size: .8rem; padding-block: var(--s4); display: none; }

/* Top bar */
.topbar { background: var(--surface); border-block-end: 1px solid var(--border); position: sticky; inset-block-start: 0; z-index: 10; }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--s4); max-inline-size: 1200px; margin-inline: auto; padding: var(--s3) var(--gutter); }
.brand { display: inline-flex; align-items: center; gap: var(--s2); font-weight: 700; font-size: 1.1rem; color: var(--text); text-decoration: none; }
.brand-mark { inline-size: 28px; block-size: 28px; fill: var(--accent); }
.nav-desktop { display: none; align-items: center; gap: var(--s1); }
.nav-desktop a, .nav-desktop .link { padding: var(--s2) var(--s3); border-radius: var(--r-ctl); color: var(--text); text-decoration: none; font-weight: 500; }
.nav-desktop a:hover, .nav-desktop .link:hover { background: var(--surface-2); }
.nav-desktop a[aria-current="page"] { color: var(--accent); background: var(--info-bg); }

/* Bottom tab bar (phones) */
.tabbar { position: fixed; inset-inline: 0; inset-block-end: 0; z-index: 10; display: grid; grid-template-columns: repeat(3, 1fr);
  background: var(--surface); border-block-start: 1px solid var(--border); padding-block-end: env(safe-area-inset-bottom); }
.tabbar a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; min-block-size: var(--tabbar-h);
  color: var(--muted); text-decoration: none; font-size: .75rem; font-weight: 600; }
.tabbar svg { inline-size: 24px; block-size: 24px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.tabbar a[aria-current="page"] { color: var(--accent); }
.tabbar .tab-primary svg { background: var(--accent); color: var(--on-accent); border-radius: 50%; padding: 4px; inline-size: 32px; block-size: 32px; }

/* Cards */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-card); padding: var(--s4); box-shadow: var(--sh-1); }
.card.narrow { max-inline-size: 440px; margin-inline: auto; }
.card.empty { text-align: center; padding-block: var(--s6); }
.card + .card, .card + .stack, .stack + .card, .banner + .card, .card + .banner, .result-grid + .card, .card + .actions { margin-block-start: var(--s4); }

/* Notices */
.notice, .banner, .error-box { border-radius: var(--r-ctl); padding: var(--s3) var(--s4); margin-block-end: var(--s4); }
.notice { background: var(--info-bg); }
.banner-warn { background: var(--warn-bg); color: var(--text); border-inline-start: 4px solid var(--warn); }
.banner-danger { background: var(--danger-bg); color: var(--text); border-inline-start: 4px solid var(--danger); }
.error-box { background: var(--danger-bg); border-inline-start: 4px solid var(--danger); }
.error-box[hidden] { display: none; }
.error { color: var(--danger); font-size: .9rem; margin: var(--s1) 0 0; }

/* Forms */
.field label { display: block; font-weight: 600; margin-block-end: var(--s1); }
.hint { color: var(--muted); font-size: .875rem; margin: 0 0 var(--s1); }
input[type="text"], input[type="email"], input[type="password"], input:not([type]) {
  inline-size: 100%; min-block-size: 44px; padding: var(--s2) var(--s3); font: inherit; color: var(--text);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-ctl); }
input[aria-invalid="true"] { border-color: var(--danger); }
.field.check { display: grid; grid-template-columns: auto 1fr; gap: var(--s2) var(--s3); align-items: start; }
.field.check input { inline-size: 22px; block-size: 22px; margin: 2px 0 0; accent-color: var(--accent); }
.field.check label { font-weight: 400; margin: 0; }
.field.check .error { grid-column: 1 / -1; }
details summary { cursor: pointer; color: var(--accent); font-weight: 600; min-block-size: 44px; display: flex; align-items: center; }
details[open] summary { margin-block-end: var(--s3); }
.links { margin-block-start: var(--s4); text-align: center; color: var(--muted); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--s2); min-block-size: 44px; padding: var(--s2) var(--s4);
  font: inherit; font-weight: 600; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-ctl);
  text-decoration: none; cursor: pointer; touch-action: manipulation; }
.btn:hover { background: var(--surface-2); color: var(--text); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); color: var(--on-accent); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger-outline { color: var(--danger); border-color: currentColor; }
.btn-block { inline-size: 100%; }
.btn-sm { min-block-size: 36px; padding: var(--s1) var(--s3); font-size: .9rem; }
.btn[disabled] { opacity: .6; cursor: progress; }
.link { background: none; border: 0; padding: 0; font: inherit; color: var(--accent); cursor: pointer; text-decoration: underline; min-block-size: 44px; }
.actions { display: flex; flex-wrap: wrap; gap: var(--s3); margin-block-start: var(--s4); }

/* Status chips and tags */
.chip { display: inline-flex; align-items: center; gap: var(--s1); padding: 2px var(--s3) 2px var(--s2); border-radius: 999px; font-size: .85rem; font-weight: 600; white-space: nowrap; background: var(--surface-2); }
.chip svg { inline-size: 16px; block-size: 16px; fill: none; stroke: currentColor; stroke-width: 2.5; stroke-linecap: round; }
.chip-done { background: var(--ok-bg); color: var(--ok); }
.chip-failed { background: var(--danger-bg); color: var(--danger); }
.chip-processing, .chip-queued { background: var(--info-bg); color: var(--accent); }
.spin { transform-origin: 12px 12px; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.tag { display: inline-block; padding: 0 var(--s2); border-radius: 6px; font-size: .78rem; background: var(--surface-2); color: var(--muted); }
.tag-warn { background: var(--warn-bg); color: var(--warn); }
.tag-danger, .tag-demo { background: var(--danger-bg); color: var(--danger); font-weight: 700; }
.tags { display: flex; flex-wrap: wrap; gap: var(--s1); align-items: center; margin-block-start: var(--s1); }

/* Test list */
.test-list, .admin-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s3); }
.test-row { display: grid; grid-template-columns: 1fr auto; gap: var(--s1) var(--s3); align-items: center; color: var(--text); text-decoration: none; }
.test-row:hover { border-color: var(--accent); color: var(--text); }
.test-label { font-weight: 600; }
.test-meta { grid-column: 1; color: var(--muted); font-size: .875rem; }
.test-row .chip { grid-row: 1 / span 2; grid-column: 2; }

/* New test */
.slots { display: grid; gap: var(--s4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.slot h2 { margin-block-end: var(--s3); }
.drop { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--s2); text-align: center;
  min-block-size: 140px; padding: var(--s4); border: 2px dashed var(--border); border-radius: var(--r-card); cursor: pointer; background: var(--surface-2); }
.drop:hover, .slot.dragover .drop { border-color: var(--accent); }
.drop svg { inline-size: 32px; block-size: 32px; fill: none; stroke: var(--accent); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
input[type="file"]:focus-visible + .file-info, .slot:focus-within .drop { outline: 3px solid var(--focus); outline-offset: 2px; }
.slot.has-file .drop { display: none; }
.file-info[hidden] { display: none; }
.file-name { font-weight: 600; }
progress { inline-size: 100%; block-size: 10px; accent-color: var(--accent); }

/* Progress steps */
.steps { list-style: none; padding: 0; margin: 0 0 var(--s4); display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s2); counter-reset: s; }
.steps li { counter-increment: s; font-size: .85rem; color: var(--muted); padding-block-start: var(--s3); border-block-start: 4px solid var(--border); }
.steps li.done { color: var(--ok); border-color: var(--ok); }
.steps li.current { color: var(--accent); border-color: var(--accent); font-weight: 700; }

/* Result */
.result-grid { display: grid; gap: var(--s4); grid-template-columns: minmax(0, 1fr); }
.viewer { position: relative; aspect-ratio: 4 / 3; border-radius: var(--r-ctl); background: var(--surface-2); overflow: hidden; touch-action: none; }
.viewer canvas { display: block; inline-size: 100%; block-size: 100%; }
.viewer-poster { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--s3); padding: var(--s4); text-align: center; }
.segmented { display: inline-flex; margin-block-start: var(--s3); border: 1px solid var(--border); border-radius: var(--r-ctl); overflow: hidden; }
.seg-btn { min-block-size: 44px; min-inline-size: 88px; border: 0; background: var(--surface); color: var(--text); font: inherit; font-weight: 600; cursor: pointer; }
.seg-btn[aria-pressed="true"] { background: var(--accent); color: var(--on-accent); }

table.angles { inline-size: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.angles th, .angles td { padding: var(--s2); text-align: end; border-block-end: 1px solid var(--border); }
.angles thead th { font-size: .8rem; color: var(--muted); font-weight: 600; }
.angles th.tooth, .angles thead th:first-child { text-align: start; }
.tooth { display: flex; align-items: center; gap: var(--s2); font-weight: 400; }
.swatch { inline-size: 14px; block-size: 14px; flex: none; }
.off { color: var(--warn); font-weight: 700; }
.flag { color: var(--warn); }
.kv { display: grid; grid-template-columns: auto 1fr; gap: var(--s1) var(--s4); margin: 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.small-h { font-size: 1rem; }
.qr { display: block; margin-inline: auto; background: #fff; border-radius: var(--r-ctl); }
.codes { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s2); list-style: none; padding: 0; }
.numbered { padding-inline-start: 1.2em; }

/* Admin */
.admin-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--s3); }
.admin-main { display: flex; flex-direction: column; min-inline-size: 0; flex: 1 1 260px; }
.admin-actions { display: flex; gap: var(--s2); flex-wrap: wrap; }

/* Small screens: one compact card per tooth — name + confidence, then an angulation and an inclination row */
@media (max-width: 639.98px) {
  .hide-sm { display: none !important; }
  .angles thead { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .angles, .angles tbody { display: block; }
  .angles tr { display: grid; grid-template-columns: minmax(0, 1fr) repeat(3, minmax(3.6rem, auto)); align-items: end;
    gap: 2px var(--s3); padding-block: var(--s3); border-block-end: 1px solid var(--border); }
  .angles th, .angles td { border: 0; padding: 0; }
  .angles th.tooth { grid-row: 1; grid-column: 1 / 4; padding-block-end: var(--s1); }
  .angles .c-conf { grid-row: 1; grid-column: 4; align-self: center; white-space: nowrap; }
  .angles tr::before, .angles tr::after { color: var(--muted); font-size: .9rem; grid-column: 1; }
  .angles tr::before { content: "Angulation"; grid-row: 2; }
  .angles tr::after { content: "Inclination"; grid-row: 3; }
  .angles .c-ang, .angles .c-angn, .angles .c-angd { grid-row: 2; }
  .angles .c-inc, .angles .c-incn, .angles .c-incd { grid-row: 3; }
  .angles .c-ang, .angles .c-inc { grid-column: 2; }
  .angles .c-angn, .angles .c-incn { grid-column: 3; }
  .angles .c-angd, .angles .c-incd { grid-column: 4; }
  .angles tbody tr:first-child td:not(.c-conf)::before { content: attr(data-short); display: block; color: var(--muted); font-size: .7rem; }
}

@media (min-width: 640px) {
  :root { --gutter: 24px; }
  .card { padding: var(--s5); }
  .tabbar { display: none; }
  .nav-desktop { display: flex; }
  main.container { padding-block-end: var(--s7); }
  .footer { display: block; }
}
@media (min-width: 1024px) {
  .result-grid { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: start; }
  .viewer-card { position: sticky; inset-block-start: 80px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* Print: the result page is the report */
@media print {
  :root { --bg: #fff; --surface: #fff; --text: #000; --muted: #444; --border: #bbb; }
  .topbar, .tabbar, .no-print, .actions, .footer, .skip { display: none !important; }
  body { font-size: 10.5pt; }
  main.container { padding: 0; max-inline-size: none; }
  .card { box-shadow: none; border: 0; padding: 0; margin-block-end: 12pt; break-inside: avoid; }
  .angles tr { break-inside: avoid; }
  .banner { border: 1px solid #000; }
}