/* Chess-Pairings — style.css */

:root {
  --bg:     #0d1117;
  --s1:     #161b22;
  --s2:     #21262d;
  --border: #30363d;
  --accent: #58a6ff;
  --green:  #3fb950;
  --red:    #f85149;
  --yellow: #d29922;
  --text:   #e6edf3;
  --muted:  #8b949e;
  --r:      8px;
  --font:   -apple-system, 'Segoe UI', Arial, sans-serif;
  --mono:   ui-monospace, 'Cascadia Code', 'Fira Code', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); font-family: var(--font); line-height: 1.5; min-height: 100vh; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Page Layout ── */
.page-header {
  background: var(--s1);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.hdr-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.hdr-brand:hover { text-decoration: none; }
.hdr-logo {
  width: 34px; height: 34px;
  border-radius: 4px;
  background: linear-gradient(135deg, #1f6feb 0%, #8957e5 100%);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
  box-shadow: 0 0 0 1px rgba(255,255,255,.1);
}
.hdr-name { font-size: 16px; font-weight: 700; }
.hdr-tagline { font-size: 12px; color: var(--muted); margin-top: 1px; display: none; }
@media (min-width: 600px) { .hdr-tagline { display: block; } }

.wrap { max-width: 1400px; margin: 0 auto; padding: 24px 16px 60px; }
@media (min-width: 768px) { .wrap { padding: 28px 24px 60px; } }

/* ── Cards ── */
.card {
  background: var(--s1);
  border: 1px solid var(--border);
  border-radius: var(--r);
  margin-bottom: 16px;
  overflow: hidden;
}
.card-hdr {
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.card-body { padding: 16px; }

/* ── Collapsible panels ── */
.panel-toggle {
  cursor: pointer;
  user-select: none;
}
.panel-toggle .toggle-label {
  font-size: 11.5px;
  font-weight: 400;
  color: var(--muted);
  margin-left: 6px;
}
.panel-body { display: none; }
.panel-body.open { display: block; }

/* ── Form ── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 14px;
}
@media (min-width: 600px) {
  .form-grid { grid-template-columns: 2fr 1fr 1fr; }
}
.adv-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 600px) {
  .adv-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 960px) {
  .adv-grid { grid-template-columns: 1fr 1fr 1fr; }
}

/* ── Colour toggle ── */
.colour-toggle {
  display: flex;
  background: var(--s2);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  width: 100%;
}
.colour-opt { cursor: pointer; flex: 1; }
.colour-opt input[type=radio] { display: none; }
.colour-opt span {
  display: block; text-align: center;
  padding: 8px 10px; font-size: 13px;
  color: var(--muted); font-family: var(--mono);
  transition: background .15s, color .15s;
  user-select: none;
}
.colour-opt input:checked + span {
  background: var(--accent);
  color: #0d1117; font-weight: 700;
}

/* ── Checkbox label ── */
.chk-label {
  display: flex; align-items: center; gap: 8px;
  cursor: pointer; font-size: 13px; color: var(--text);
  padding: 7px 10px;
  background: var(--s2); border: 1px solid var(--border); border-radius: 6px;
  transition: border-color .15s;
}
.chk-label:hover { border-color: var(--muted); }
.chk-label input[type=checkbox] { width: 15px; height: 15px; cursor: pointer; accent-color: var(--accent); flex-shrink:0; }
.chk-label input:checked ~ span { color: var(--accent); }

/* ── Not-paired row ── */
.ptable tr.not-paired td { background: #13101a; }
.ptable tr.not-paired:hover td { background: #18141f; }
.fg label {
  display: block;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 5px;
}
.fg input, .fg select {
  width: 100%;
  background: var(--s2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 14px;
  font-family: var(--mono);
  transition: border-color .15s, box-shadow .15s;
}
.fg input:focus, .fg select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px #58a6ff18;
}
.fg .hint {
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 4px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 13.5px; font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .15s;
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}
.btn:hover { text-decoration: none; }
.btn-primary  { background: var(--accent); color: #0d1117; }
.btn-primary:hover  { background: #79c0ff; }
.btn-success  { background: var(--green); color: #0d1117; }
.btn-success:hover  { background: #56d364; }
.btn-ghost    { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-ghost:hover    { color: var(--text); border-color: var(--muted); }
.btn-sm { padding: 5px 11px; font-size: 12px; }
.btn-row { display: flex; gap: 9px; flex-wrap: wrap; align-items: center; margin-top: 14px; }

/* ── Alerts ── */
.alert {
  padding: 12px 15px; border-radius: 7px;
  font-size: 13px; margin-bottom: 16px;
  display: flex; gap: 10px; align-items: flex-start;
}
.alert-err  { background: #200d0d; border: 1px solid #f8514944; color: #ffa0a0; }
.alert-info { background: #0d1929; border: 1px solid #58a6ff33; color: #a0c8ff; }

/* ── Activity Log ── */
.log {
  font-family: var(--mono); font-size: 12px; line-height: 1.8;
  background: #010409; border-radius: 6px;
  padding: 10px 12px; max-height: 200px; overflow-y: auto;
}
.log .ok   { color: var(--green); }
.log .warn { color: var(--yellow); }
.log .err  { color: var(--red); }
.log .info { color: var(--muted); }

/* ── JSON / TRF viewer ── */
.code-viewer {
  font-family: var(--mono); font-size: 12px; line-height: 1.6;
  background: #010409; color: #adbac7;
  padding: 12px 14px; max-height: 280px; overflow: auto;
  white-space: pre; tab-size: 2;
  border-top: 1px solid var(--border);
}

/* ── Historical accuracy ── */
.hist-row {
  display: flex; gap: 10px; flex-wrap: wrap; align-items: center;
  padding: 12px 16px;
}
.hist-pill {
  font-size: 13px; font-weight: 700;
  padding: 3px 12px; border-radius: 20px;
}

/* ── Pairings table ── */
.ptable { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.ptable th {
  padding: 8px 10px; text-align: left;
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .04em; color: var(--muted);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  background: var(--s2);
}
.ptable td { padding: 8px 10px; border-bottom: 1px solid #21262d; vertical-align: middle; }
.ptable tr:last-child td { border-bottom: none; }
.ptable tr:hover td { background: #1c2128; }
.ptable tr.bye td { background: #15191f; }

/* Hide on small screens */
.col-hide { display: none; }
@media (min-width: 768px) { .col-hide { display: table-cell; } }

.th-bd  { width: 42px; text-align: center; }
.th-no  { width: 44px; }
.th-res { width: 110px; }
.board-n { text-align: center; font-family: var(--mono); font-weight: 600; color: var(--muted); }
.pname   { font-weight: 500; }
.prtg    { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.ppts    { font-family: var(--mono); font-size: 13px; font-weight: 600; }
.pno     { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.vs      { text-align: center; }

.res-sel {
  width: 90px;
  background: var(--s2); border: 1px solid var(--border);
  color: var(--text); border-radius: 5px;
  padding: 4px 6px; font-size: 12.5px; font-family: var(--mono);
  cursor: pointer;
}
.res-sel:focus { outline: none; border-color: var(--accent); }

/* ── Badges ── */
.badge {
  font-size: 11.5px; font-weight: 600;
  padding: 2px 9px; border-radius: 20px;
  white-space: nowrap;
}
.badge-blue   { background: #1f6feb22; color: var(--accent); border: 1px solid #1f6feb44; }
.badge-green  { background: var(--green)22; color: var(--green); border: 1px solid var(--green)44; }
.badge-muted  { background: var(--border); color: var(--muted); }

/* ── Pairing source tag ── */
.source-tag {
  font-size: 11.5px; font-weight: 600;
  padding: 2px 9px; border-radius: 20px;
}
.source-actual    { background: var(--green)22; color: var(--green); border: 1px solid var(--green)44; }
.source-predicted { background: #1f6feb22; color: var(--accent); border: 1px solid #1f6feb44; }

/* ── Advanced options toggle ── */
.adv-toggle {
  font-size: 12px; color: var(--muted); cursor: pointer; user-select: none;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 0; margin-bottom: 12px;
}
.adv-toggle::before { content: '▶'; font-size: 9px; transition: transform .2s; }
.adv-toggle.open::before { transform: rotate(90deg); }
.adv-panel { display: none; }
.adv-panel.open { display: block; }

/* ── Predict footer ── */
.predict-footer {
  padding: 14px 16px;
  border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}