:root {
  --bg: #f6f4f0;
  --card: #ffffff;
  --text: #1f1c18;
  --muted: #6b645a;
  --border: #e3ded5;
  --accent: #7a5a2f;
  --model: #2fa84f;
  --estimated: #f08c00;
  --user: #2b7de9;
  --ideal: #2f8f46;
  --ideal-bg: #e6f4ea;
  --acceptable: #9a6b00;
  --acceptable-bg: #fdf3dc;
  --deviation: #c0392b;
  --deviation-bg: #fbe7e5;
  --highlight: #ff2d95;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171512;
    --card: #221f1b;
    --text: #ece7df;
    --muted: #a39b8f;
    --border: #3a352e;
    --accent: #d2a96a;
    --ideal: #6fcf86;
    --ideal-bg: #1d3324;
    --acceptable: #e8c069;
    --acceptable-bg: #3a3020;
    --deviation: #f08377;
    --deviation-bg: #3d2220;
  }
}

* { box-sizing: border-box; }
/* Element display rules (e.g. #workspace grid) must not override the hidden attribute */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

header { padding: 20px 24px 8px; }
h1 { margin: 0; font-size: 22px; color: var(--accent); }
h2 { margin: 0 0 12px; font-size: 18px; }
.sub { margin: 2px 0 0; color: var(--muted); }

main { padding: 12px 24px 32px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

#drop {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  min-height: min(420px, calc(100vh - 170px));
  padding: 32px 20px;
  border: 2px dashed var(--border);
  border-radius: 8px;
  text-align: center;
  cursor: pointer;
}
#drop:hover { border-color: var(--accent); }
#drop span { color: var(--muted); font-size: 14px; max-width: 460px; }
#status { margin: 0 0 10px; }

.photo-area { position: relative; }
#busy {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 160px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--card) 80%, transparent);
  text-align: center;
}
#busy span:last-child { color: var(--muted); font-size: 14px; }
.spinner {
  width: 36px;
  height: 36px;
  margin-bottom: 6px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .spinner { animation-duration: 2.4s; }
}
#manual { margin-top: 10px; }
#status:empty { display: none; }
#status.error { color: var(--deviation); }

#drop-overlay {
  position: fixed;
  inset: 12px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px dashed var(--accent);
  border-radius: 12px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  color: var(--accent);
  font-size: 20px;
  pointer-events: none;
}
button:disabled { opacity: 0.5; cursor: default; }

button {
  font: inherit;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--card);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
}
button.secondary { background: transparent; color: var(--accent); }

#workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 400px;
  gap: 16px;
  align-items: start;
}
@media (max-width: 1000px) {
  #workspace { grid-template-columns: 1fr; }
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--muted);
}
.tools { display: flex; gap: 8px; align-items: center; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 6px; align-items: center; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-left: 6px; }
.dot.model { background: var(--model); }
.dot.estimated { background: var(--estimated); }
.dot.user { background: var(--user); }

#canvas {
  position: relative;
  /* --aspect (width / height) is set from JS: fill the width but keep the whole horse on screen */
  width: min(100%, calc((100vh - 170px) * var(--aspect, 1.5)));
  margin: 0 auto;
  line-height: 0;
}
#photo { display: block; width: 100%; height: auto; border-radius: 6px; user-select: none; }
#overlay { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; }

#overlay .bone { stroke: #fff; stroke-opacity: 0.75; fill: none; }
#overlay .measure { stroke: var(--highlight); fill: none; stroke-linecap: round; }
#overlay .kp { stroke: #fff; }
#overlay .kp.hover { stroke: var(--highlight); }
#overlay .kp.model { fill: var(--model); }
#overlay .kp.estimated { fill: var(--estimated); }
#overlay .kp.user { fill: var(--user); }
#overlay .kp.active { stroke: var(--highlight); }
#overlay .kp.cross path { fill: none; stroke-linecap: round; }
#overlay .kp.cross .halo { stroke: #fff; }
#overlay .kp.cross.hover .halo, #overlay .kp.cross.active .halo { stroke: var(--highlight); }
#overlay .kp.cross.model .arm { stroke: var(--model); }
#overlay .kp.cross.estimated .arm { stroke: var(--estimated); }
#overlay .kp.cross.user .arm { stroke: var(--user); }
#overlay .loupe { pointer-events: none; }
#overlay .loupe path { fill: none; stroke-linecap: round; }
#overlay .loupe .halo { stroke: #fff; }
#overlay .loupe .arm.model { stroke: var(--model); }
#overlay .loupe .arm.estimated { stroke: var(--estimated); }
#overlay .loupe .arm.user { stroke: var(--user); }
#overlay .loupe-bg { fill: #000; }
#overlay .loupe-ring { fill: none; stroke: #fff; filter: drop-shadow(0 1px 3px rgb(0 0 0 / 0.6)); }
#overlay .label {
  fill: #fff;
  paint-order: stroke;
  stroke: #000;
  stroke-opacity: 0.8;
  pointer-events: none;
}

.hint { color: var(--muted); font-size: 13px; margin: 10px 0 0; line-height: 1.4; }

.report { position: sticky; top: 12px; max-height: calc(100vh - 24px); overflow: auto; }
.group-title {
  margin: 16px 0 6px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}
.finding {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  margin-bottom: 6px;
  cursor: pointer;
}
.finding:hover, .finding.active { border-color: var(--highlight); }
.finding .row { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.finding .title { font-weight: 600; }
.finding .value { font-variant-numeric: tabular-nums; white-space: nowrap; }
.finding .text { font-size: 13px; color: var(--muted); margin-top: 2px; }
.finding .range { font-size: 12px; color: var(--muted); }
.badge {
  font-size: 11px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 999px;
  margin-left: 6px;
}
.badge.ideal { color: var(--ideal); background: var(--ideal-bg); }
.badge.acceptable { color: var(--acceptable); background: var(--acceptable-bg); }
.badge.deviation { color: var(--deviation); background: var(--deviation-bg); }

.warning {
  background: var(--acceptable-bg);
  color: var(--text);
  border-left: 3px solid var(--acceptable);
  padding: 8px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
  font-size: 13px;
}

.summary { display: flex; gap: 6px; margin-bottom: 4px; }
.disclaimer { font-size: 12px; color: var(--muted); margin-top: 16px; }

.horse-form { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }
.form-intro { margin: -6px 0 12px; }
.fields {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px 12px;
}
.fields label, .horse-form .check { font-size: 13px; color: var(--muted); }
.fields label { display: flex; flex-direction: column; gap: 3px; }
.fields .wide { grid-column: 1 / -1; }
.fields label[hidden] { display: none; }
.horse-form input:not([type="checkbox"]), .horse-form select, .horse-form textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 8px;
  width: 100%;
}
.horse-form textarea { resize: vertical; }
.horse-form .fields.extra { margin-top: 12px; }
.horse-form fieldset { border: 1px solid var(--border); border-radius: 8px; margin: 14px 0 0; padding: 8px 12px 12px; }
.horse-form legend { font-size: 13px; font-weight: 600; padding: 0 4px; }
.horse-form .check { display: flex; gap: 8px; align-items: center; margin-top: 14px; color: var(--text); }
#unchecked-points:empty { display: none; }
#unchecked-points { color: var(--acceptable); margin-top: 4px; }
.save-row { display: flex; gap: 12px; align-items: center; margin-top: 12px; }
#save-status { font-size: 13px; color: var(--muted); }
#save-status.error { color: var(--deviation); }

/* ---- header / user bar ---- */
header.top { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
.user-bar { display: flex; gap: 12px; align-items: center; font-size: 14px; flex-wrap: wrap; }
.user-bar .who { color: var(--muted); }
.user-bar a, .user-bar summary { color: var(--accent); cursor: pointer; text-decoration: none; }
.user-bar a:hover, .user-bar summary:hover { text-decoration: underline; }
.menu { position: relative; }
.menu summary { list-style: none; }
.menu summary::-webkit-details-marker { display: none; }
.popover {
  position: absolute;
  right: 0;
  top: 28px;
  z-index: 10;
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  box-shadow: 0 6px 24px rgb(0 0 0 / 0.25);
}
.popover label, .login-card label { display: flex; flex-direction: column; gap: 3px; font-size: 13px; color: var(--muted); }
.popover input, .login-card input, .users-page input, .users-page select {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 8px;
}
.form-msg { font-size: 13px; margin: 6px 0 0; }
.form-msg:empty { display: none; }
.form-msg.error { color: var(--deviation); }
button.small { padding: 2px 8px; font-size: 12px; margin-left: 6px; }
code.secret { font-size: 14px; padding: 1px 6px; border-radius: 4px; background: var(--bg); border: 1px solid var(--border); user-select: all; }

/* ---- login ---- */
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: min(360px, 100%); display: flex; flex-direction: column; gap: 12px; }
.login-card h1 { margin-bottom: 4px; }

/* ---- users ---- */
.users-page { display: flex; flex-direction: column; gap: 16px; max-width: 980px; }
.users-page .fields { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px 12px; align-items: end; }
.users-page .fields label { display: flex; flex-direction: column; gap: 3px; font-size: 13px; color: var(--muted); }
.table-wrap { overflow-x: auto; }
table.users { width: 100%; border-collapse: collapse; font-size: 14px; }
table.users th { text-align: left; font-size: 12px; color: var(--muted); font-weight: 600; padding: 6px 8px; border-bottom: 1px solid var(--border); }
table.users td { padding: 8px; border-bottom: 1px solid var(--border); white-space: nowrap; }
table.users tr.inactive td { color: var(--muted); }

/* ---------------------------------------------------------------- help page */

.guide-page {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(320px, 1fr);
  gap: 16px;
  align-items: start;
  max-width: 1500px;
}
@media (max-width: 900px) {
  .guide-page { grid-template-columns: 1fr; }
}
.guide-diagram { position: sticky; top: 12px; }
@media (max-width: 900px) {
  .guide-diagram { position: static; }
}
#diagram { display: block; width: 100%; height: auto; border-radius: 6px; }
#diagram .bone { stroke: #fff; stroke-opacity: 0.7; stroke-width: 2.5; stroke-linecap: round; }
#diagram .pt { cursor: pointer; }
#diagram .pt .spot { fill: var(--highlight); stroke: #fff; stroke-width: 1.5; }
#diagram .pt .badge { fill: rgb(0 0 0 / 0.55); stroke: #fff; stroke-width: 2; }
#diagram .pt text {
  fill: #fff;
  font: 600 16px system-ui, sans-serif;
  text-anchor: middle;
  dominant-baseline: central;
  pointer-events: none;
}
/* Highlighted: the badge steps aside so the exact spot is visible */
#diagram .pt.on .badge { fill: var(--highlight); transform: translate(26px, -26px); }
#diagram .pt.on text { transform: translate(26px, -26px); }
#diagram .pt.on .spot { r: 6; }
#diagram .pt:not(.on) .spot { display: none; }

.guide-content { display: flex; flex-direction: column; gap: 16px; }
.guide-rules { margin: 0; padding-left: 20px; }
.guide-rules li { margin-bottom: 8px; }
.guide-point {
  padding: 10px 12px;
  margin: 0 -12px;
  border-radius: 8px;
  scroll-margin-top: 12px;
}
.guide-point.on { background: var(--bg); }
.guide-point h3 { display: flex; align-items: center; gap: 8px; margin: 0 0 4px; font-size: 16px; }
.guide-point p { margin: 4px 0; }
.guide-point .lead { font-weight: 600; }
.guide-point .avoid { color: var(--muted); font-size: 14px; }
.num {
  display: inline-grid;
  place-items: center;
  min-width: 24px;
  height: 24px;
  border-radius: 12px;
  background: var(--accent);
  color: var(--card);
  font-size: 13px;
}