/* ==========================================================================
   CALCULADORA DE EXTENSIÓN DE RODILLA
   Adaptación al sistema de diseño de Emancipation Cycling (con soporte de
   modo claro/oscuro) de una calculadora de referencia de ajuste biomecánico.
   Todo vive bajo <div class="knee-calc">, con seis colores "de acento"
   (cyan, amber, purple, emerald, rose, indigo) usados como código de color
   por métrica. Cada acento tiene tres variantes: -dim (fondo suave),
   -mid (borde / círculo de icono) y la variable base (texto/ícono vivo).
   ========================================================================== */

.knee-calc {
  --bg: var(--bg-body);
  --surface: var(--bg-surface);
  --surface-2: var(--bg-body);
  --border: var(--border-color);
  --border-soft: var(--border-color);
  --text: var(--text-main);
  --text-dim: var(--text-muted);
  --text-faint: #94a3b8;

  --cyan: #0e7490;    --cyan-dim: #e0f2f6;    --cyan-mid: #b7e3ec;
  --amber: #a16207;   --amber-dim: #fdf1e0;   --amber-mid: #f5dba8;
  --purple: #6d28d9;  --purple-dim: #f1ecfc;  --purple-mid: #dccbf7;
  --emerald: #15803d; --emerald-dim: #e3f6ec; --emerald-mid: #b9e8cf;
  --rose: #be123c;    --rose-dim: #fbe7ec;    --rose-mid: #f3bfcd;
  --indigo: #4338ca;  --indigo-dim: #e9eafb;  --indigo-mid: #c7cbf5;
  --purple-soft: rgba(109, 40, 217, 0.07);

  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  padding: 1.75rem 1rem 3.5rem;
}

[data-theme="dark"] .knee-calc {
  --text-faint: #71717a;

  --cyan: #38d6e0;    --cyan-dim: #0f2233;    --cyan-mid: #164a5f;
  --amber: #f2b544;   --amber-dim: #3a2c10;   --amber-mid: #4a3a12;
  --purple: #ab8bf7;  --purple-dim: #1c1533;  --purple-mid: #3a2b66;
  --emerald: #39d59d; --emerald-dim: #0f3327; --emerald-mid: #14503a;
  --rose: #f2758d;    --rose-dim: #3a1a24;    --rose-mid: #4a2230;
  --indigo: #8b93f7;  --indigo-dim: #211f45;  --indigo-mid: #2f2c66;
  --purple-soft: rgba(171, 139, 247, 0.13);
}

.knee-calc h1, .knee-calc h2, .knee-calc h3, .knee-calc h4 { font-family: var(--font-main); text-wrap: balance; }
.knee-calc .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.knee-calc button, .knee-calc input, .knee-calc select { font: inherit; color: inherit; }

.knee-calc .page { max-width: 1080px; margin: 0 auto; display: flex; flex-direction: column; gap: 22px; }

/* ---------------- Encabezado ---------------- */

.knee-calc .head { text-align: center; display: flex; flex-direction: column; gap: 6px; align-items: center; }
.knee-calc .eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--cyan); background: var(--cyan-dim); border: 1px solid var(--cyan-mid);
  padding: 5px 12px; border-radius: var(--radius-full);
}
.knee-calc .head h1 { font-size: clamp(26px, 4vw, 34px); font-weight: 800; color: var(--text); letter-spacing: -0.01em; }
.knee-calc .head .sub { color: var(--text-dim); font-size: 14px; max-width: 56ch; }
.knee-calc .head .sub b { color: var(--text); font-weight: 700; }

/* ---------------- Panel de parámetros ---------------- */

.knee-calc .panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--card-shadow);
}
.knee-calc .panel-head {
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--font-mono); font-size: 11px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-faint); margin-bottom: 12px;
}
.knee-calc .live-badge {
  display: inline-flex; align-items: center; gap: 5px;
  color: var(--emerald); background: var(--emerald-dim); border: 1px solid var(--emerald-mid);
  padding: 3px 9px; border-radius: var(--radius-sm); font-size: 10px;
}
.knee-calc .live-badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--emerald); box-shadow: 0 0 0 3px var(--emerald-mid); }

.knee-calc .control-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(122px, 1fr)); gap: 10px; }
.knee-calc .control {
  background: var(--surface-2); border: 1px solid var(--border-soft); border-radius: var(--radius-md);
  padding: 10px 12px; display: flex; flex-direction: column; gap: 4px; transition: border-color 0.15s;
}
.knee-calc .control:focus-within { border-color: var(--ctl-color, var(--cyan)); }
.knee-calc .control-head {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 6px;
  min-height: 28px; /* reserva espacio para 2 líneas: así todas las filas de valores quedan alineadas */
}
.knee-calc .control label { font-size: 10.5px; font-weight: 700; line-height: 1.3; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }
.knee-calc .control .sub-val { font-family: var(--font-mono); font-size: 9.5px; color: var(--ctl-color, var(--text-faint)); }
.knee-calc .control-row { display: flex; align-items: baseline; gap: 4px; }
.knee-calc .control input, .knee-calc .control select {
  width: 100%; background: transparent; border: 0; outline: 0;
  font-family: var(--font-mono); font-weight: 700; font-size: 16px; color: var(--ctl-color, var(--text)); padding: 0;
}
.knee-calc .control select { cursor: pointer; appearance: none; }
.knee-calc .control .unit { font-size: 10.5px; color: var(--text-faint); font-weight: 700; white-space: nowrap; }
.knee-calc .angle-hint { margin-top: 12px; font-size: 11.5px; color: var(--text-faint); line-height: 1.5; }
.knee-calc .angle-hint b { color: var(--text-dim); }

/* ---------------- Layout ---------------- */

.knee-calc .layout { display: grid; grid-template-columns: minmax(0, 320px) minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 820px) { .knee-calc .layout { grid-template-columns: 1fr; } }

.knee-calc .card-title { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--border-soft); padding-bottom: 12px; margin-bottom: 14px; }
.knee-calc .card-title h2 { font-size: 16px; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 8px; }
.knee-calc .badge { font-family: var(--font-mono); font-size: 10px; font-weight: 700; letter-spacing: 0.05em; padding: 3px 9px; border-radius: var(--radius-full); white-space: nowrap; }
.knee-calc .badge-emerald { background: var(--emerald-dim); color: var(--emerald); border: 1px solid var(--emerald-mid); }
.knee-calc .badge-amber { background: var(--amber-dim); color: var(--amber); border: 1px solid var(--amber-mid); }
.knee-calc .badge-blue { background: var(--indigo-dim); color: var(--indigo); border: 1px solid var(--indigo-mid); }

/* ---------------- Columna de métricas ---------------- */

.knee-calc .stat-tile { background: var(--surface-2); border: 1px solid var(--border-soft); border-radius: var(--radius-md); padding: 14px; position: relative; overflow: hidden; margin-bottom: 12px; }
.knee-calc .stat-tile:last-of-type { margin-bottom: 0; }
.knee-calc .stat-tile .glow { position: absolute; right: -14px; bottom: -14px; width: 70px; height: 70px; border-radius: 50%; filter: blur(18px); opacity: 0.28; }
.knee-calc .stat-label { font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); display: block; margin-bottom: 5px; }
.knee-calc .stat-value { font-family: var(--font-mono); font-size: 28px; font-weight: 700; line-height: 1; }
.knee-calc .stat-note { font-size: 11px; color: var(--text-dim); margin-top: 8px; line-height: 1.45; }

.knee-calc .breakdown { background: var(--surface-2); border: 1px solid var(--border-soft); border-radius: var(--radius-md); padding: 13px 14px; font-size: 12.5px; margin-top: 14px; }
.knee-calc .breakdown-row { display: flex; justify-content: space-between; align-items: center; padding: 7px 0; border-bottom: 1px solid var(--border-soft); gap: 10px; }
.knee-calc .breakdown-row:last-child { border-bottom: 0; padding-bottom: 0; }
.knee-calc .breakdown-row span:first-child { color: var(--text-dim); }
.knee-calc .breakdown-row span:last-child { font-family: var(--font-mono); font-weight: 700; text-align: right; }

.knee-calc .status-box { border-radius: var(--radius-md); padding: 13px 14px; margin-top: 14px; border: 1px solid; }
.knee-calc .status-title { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 12.5px; margin-bottom: 5px; }
.knee-calc .status-title svg { width: 15px; height: 15px; flex-shrink: 0; }
.knee-calc .status-text { font-size: 11.5px; line-height: 1.55; }

/* ---------------- Columna del informe ---------------- */

.knee-calc .report { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px clamp(16px, 3vw, 30px); display: flex; flex-direction: column; gap: 26px; box-shadow: var(--card-shadow); }
.knee-calc section h3 { font-size: 17px; font-weight: 700; color: var(--text); display: flex; align-items: baseline; gap: 8px; }
.knee-calc section h3 span.idx { font-family: var(--font-mono); font-weight: 700; }
.knee-calc section > p.lead { font-size: 13.5px; line-height: 1.65; color: var(--text-dim); margin-top: 10px; }
.knee-calc section > p.lead b { font-weight: 700; }

.knee-calc .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 14px; }
@media (max-width: 600px) { .knee-calc .two-col { grid-template-columns: 1fr; } }
.knee-calc .info-box { border-radius: var(--radius-md); padding: 13px 14px; font-size: 12px; line-height: 1.55; border: 1px solid; }
.knee-calc .info-box h4 { font-size: 12px; font-weight: 700; margin-bottom: 5px; }

.knee-calc .bench-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 16px; }
@media (max-width: 600px) { .knee-calc .bench-grid { grid-template-columns: 1fr; } }
.knee-calc .bench-card { background: var(--surface-2); border: 1px solid var(--border-soft); border-radius: var(--radius-md); padding: 11px 13px; }
.knee-calc .bench-card .k { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; display: block; margin-bottom: 4px; }
.knee-calc .bench-card .v { font-family: var(--font-mono); font-size: 16px; font-weight: 700; }
.knee-calc .bench-card .d { font-size: 10.5px; color: var(--text-faint); margin-top: 3px; }

/* ---------------- Simulador cinemático del ciclista ---------------- */

.knee-calc .rig-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 14px; align-items: start; margin-top: 18px; }
@media (max-width: 860px) { .knee-calc .rig-grid { grid-template-columns: 1fr; } }
.knee-calc .rig-stage { background: var(--surface-2); border: 1px solid var(--border-soft); border-radius: var(--radius-md); padding: 14px; }
.knee-calc #rig { width: 100%; height: auto; display: block; aspect-ratio: 8 / 7; }
.knee-calc .rig-controls { margin-top: 12px; border-top: 1px solid var(--border-soft); padding-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.knee-calc .rig-controls .lab { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; flex-wrap: wrap; font-size: 12px; color: var(--text-dim); }
.knee-calc .rig-controls .lab b { font-family: var(--font-mono); font-size: 14px; color: var(--amber); font-weight: 700; }
.knee-calc .rig-controls .lab .delta { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); }
.knee-calc .rig-controls input[type="range"] { width: 100%; accent-color: var(--amber); cursor: pointer; }
.knee-calc .rig-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.knee-calc .btn { border: 1px solid var(--border-soft); background: var(--surface); border-radius: var(--radius-sm); padding: 6px 12px; cursor: pointer; font-size: 11.5px; font-weight: 700; color: var(--text-dim); font-family: var(--font-main); transition: var(--transition-smooth); }
.knee-calc .btn:hover { border-color: var(--amber); color: var(--text); }
.knee-calc .rig-side { display: flex; flex-direction: column; gap: 10px; }
.knee-calc .rig-side .bench-grid { grid-template-columns: repeat(2, 1fr); margin-top: 0; }

.knee-calc .callout-box { display: flex; align-items: flex-start; gap: 12px; border-radius: var(--radius-md); padding: 13px 14px; border: 1px solid; font-size: 12.5px; }
.knee-calc .callout-icon { flex-shrink: 0; width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 12px; margin-top: 1px; }
.knee-calc .callout-box h4 { font-weight: 700; font-size: 13px; margin-bottom: 3px; }
.knee-calc .callout-box p { color: var(--text-dim); line-height: 1.55; }
.knee-calc .rec-stack { display: flex; flex-direction: column; gap: 10px; margin-top: 14px; }

.knee-calc .leg-caption { font-size: 11px; color: var(--text-faint); margin-top: 12px; line-height: 1.55; }
.knee-calc .leg-caption b { color: var(--text-dim); font-family: var(--font-mono); font-weight: 700; }

/* ---------------- Guía de medición ---------------- */

.knee-calc .measure-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 18px; align-items: start; margin-top: 14px; }
@media (max-width: 760px) { .knee-calc .measure-grid { grid-template-columns: 1fr; } }
.knee-calc .measure-figure { background: var(--surface-2); border: 1px solid var(--border-soft); border-radius: var(--radius-md); padding: 12px; }
.knee-calc .measure-figure svg { width: 100%; height: auto; display: block; }

.knee-calc .steps { list-style: none; counter-reset: paso; display: flex; flex-direction: column; gap: 11px; }
.knee-calc .steps li { counter-increment: paso; display: grid; grid-template-columns: 26px 1fr; gap: 11px; font-size: 12.5px; line-height: 1.55; color: var(--text-dim); }
.knee-calc .steps li::before {
  content: counter(paso); justify-self: start; align-self: start;
  width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  background: var(--amber-dim); color: var(--amber); border: 1px solid var(--amber-mid);
  font-family: var(--font-mono); font-size: 12px; font-weight: 700;
}
.knee-calc .steps li b { color: var(--text); font-weight: 700; }

.knee-calc .wrong-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 16px; }
@media (max-width: 640px) { .knee-calc .wrong-grid { grid-template-columns: 1fr; } }
.knee-calc .wrong-card { background: var(--rose-dim); border: 1px solid var(--rose-mid); border-radius: var(--radius-md); padding: 10px 12px 12px; }
.knee-calc .wrong-card svg { width: 100%; max-width: 190px; height: auto; display: block; margin: 0 auto 6px; }
.knee-calc .wrong-card h5 { margin: 0 0 3px; font-size: 12px; font-weight: 700; color: var(--rose); display: flex; align-items: center; gap: 6px; }
.knee-calc .wrong-card p { font-size: 11.5px; line-height: 1.5; color: var(--text-dim); }

.knee-calc .measure-note { margin-top: 14px; font-size: 12px; line-height: 1.6; color: var(--text-dim); background: var(--surface-2); border: 1px solid var(--border-soft); border-left: 3px solid var(--cyan); border-radius: var(--radius-sm); padding: 11px 13px; }
.knee-calc .measure-note b { color: var(--cyan); font-family: var(--font-mono); font-weight: 700; }