/* Burgos Gyms — sistema de diseño compartido.
   Negro cálido de sala, un acento fuerte por sitio (--accent) y tipografía condensada de afiche. */
:root {
  color-scheme: dark;
  --bg: #0b0b0c;
  --bg-2: #101012;
  --surface: #151518;
  --surface-2: #1c1c20;
  --surface-3: #24242a;
  --line: #2a2a31;
  --line-2: #383841;
  --fg: #f4f2ee;
  --muted: #a4a2a9;
  --faint: #6f6d76;
  --accent: #d4ff3a;
  --accent-ink: #0b0b0c;
  --accent-soft: color-mix(in srgb, var(--accent) 14%, transparent);
  --ok: #4fd183;
  --warn: #ffb547;
  --danger: #ff5d5d;
  --info: #6cb4ff;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, .7), 0 2px 6px rgba(0, 0, 0, .3);
  --f-display: 'Barlow Condensed', 'Arial Narrow', 'Helvetica Neue', Arial, sans-serif;
  --f-body: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --wrap: 1180px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { font-family: var(--f-display); text-transform: uppercase; line-height: .95; margin: 0; letter-spacing: .01em; text-wrap: balance; }
p { margin: 0; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
::selection { background: var(--accent); color: var(--accent-ink); }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 20px; }
.eyebrow { font-family: var(--f-display); font-weight: 600; text-transform: uppercase; letter-spacing: .18em; font-size: .9rem; color: var(--accent); }
.muted { color: var(--muted); }
.faint { color: var(--faint); }
.mono { font-variant-numeric: tabular-nums; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.stack { display: grid; gap: 16px; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }

/* Botones */
.btn {
  --b: var(--accent);
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--f-display); font-weight: 700; font-size: 1.08rem; text-transform: uppercase; letter-spacing: .07em;
  text-decoration: none; line-height: 1; white-space: nowrap;
  padding: 13px 22px; border-radius: 10px; border: 1.5px solid var(--b);
  background: var(--b); color: var(--accent-ink); cursor: pointer;
  transition: transform .15s ease, box-shadow .2s ease, background .2s, border-color .2s, color .2s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 26px -12px color-mix(in srgb, var(--b) 80%, transparent); }
.btn:active { transform: translateY(0); }
.btn[disabled] { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
.btn.ghost { background: transparent; color: var(--fg); border-color: var(--line-2); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); box-shadow: none; }
.btn.subtle { background: var(--surface-2); color: var(--fg); border-color: var(--line); }
.btn.subtle:hover { border-color: var(--line-2); background: var(--surface-3); box-shadow: none; }
.btn.danger { --b: var(--danger); color: #fff; }
.btn.danger.ghost { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 45%, transparent); background: transparent; }
.btn.sm { padding: 9px 14px; font-size: .95rem; border-radius: 8px; }
.btn.xs { padding: 6px 10px; font-size: .85rem; border-radius: 7px; gap: 6px; }
.btn.block { width: 100%; }
.btn svg { width: 18px; height: 18px; flex: none; }
.icon-btn { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 9px; border: 1px solid var(--line); background: var(--surface-2); color: var(--fg); cursor: pointer; transition: border-color .2s, color .2s; }
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }
.icon-btn svg { width: 18px; height: 18px; }

/* Formularios */
.field { display: grid; gap: 7px; min-width: 0; }
.field > span, .label { font-size: .82rem; font-weight: 600; color: var(--muted); letter-spacing: .02em; }
.field small { color: var(--faint); font-size: .8rem; }
.input, .field input:not([type=checkbox]):not([type=radio]):not([type=color]), .field select, .field textarea {
  width: 100%; min-width: 0; background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px; color: var(--fg); transition: border-color .2s, box-shadow .2s;
}
.field textarea { min-height: 96px; resize: vertical; }
.input:focus, .field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.field input::placeholder, .field textarea::placeholder, .input::placeholder { color: var(--faint); }
.field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 18px) 52%, calc(100% - 13px) 52%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 36px; }
.field input[type=color] { width: 56px; height: 44px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg-2); padding: 4px; cursor: pointer; }
.check { display: flex; gap: 10px; align-items: center; font-size: .95rem; cursor: pointer; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.form-error { color: var(--danger); font-size: .92rem; font-weight: 500; }
.pin-input { letter-spacing: .6em; font-variant-numeric: tabular-nums; font-size: 1.3rem !important; text-align: center; }

/* Tarjetas, insignias y tablas */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; min-width: 0; }
.card-h { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.card-h h2, .card-h h3 { font-size: 1.5rem; }
.badge { display: inline-flex; align-items: center; gap: 6px; font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; padding: 4px 9px; border-radius: 999px; border: 1px solid var(--line-2); color: var(--muted); white-space: nowrap; }
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.plain::before { display: none; }
.badge.ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, transparent); background: color-mix(in srgb, var(--ok) 10%, transparent); }
.badge.warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, transparent); background: color-mix(in srgb, var(--warn) 10%, transparent); }
.badge.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, transparent); background: color-mix(in srgb, var(--danger) 10%, transparent); }
.badge.info { color: var(--info); border-color: color-mix(in srgb, var(--info) 40%, transparent); background: color-mix(in srgb, var(--info) 10%, transparent); }
.badge.accent { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, transparent); background: var(--accent-soft); }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 7px 13px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--muted); font-size: .88rem; font-weight: 500; cursor: pointer; white-space: nowrap; transition: all .15s; }
.chip:hover { color: var(--fg); border-color: var(--line-2); }
.chip.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.chip .n { font-size: .75rem; opacity: .7; font-variant-numeric: tabular-nums; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table.table { width: 100%; border-collapse: collapse; font-size: .93rem; }
.table th { text-align: left; font-weight: 600; font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; color: var(--faint); padding: 12px 16px; background: var(--bg-2); border-bottom: 1px solid var(--line); white-space: nowrap; }
.table td { padding: 13px 16px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.table tr:last-child td { border-bottom: 0; }
.table tbody tr { transition: background .15s; }
.table tbody tr:hover { background: color-mix(in srgb, var(--surface-2) 60%, transparent); }
.empty { text-align: center; padding: 42px 20px; color: var(--muted); border: 1px dashed var(--line-2); border-radius: var(--radius); display: grid; gap: 12px; justify-items: center; }
.empty strong { font-family: var(--f-display); text-transform: uppercase; font-size: 1.4rem; color: var(--fg); letter-spacing: .03em; }

/* Modal y avisos */
.modal-back { position: fixed; inset: 0; z-index: 100; background: rgba(5, 5, 6, .72); backdrop-filter: blur(6px); display: grid; place-items: center; padding: 20px; animation: fade .18s ease; }
.modal { width: min(640px, 100%); max-height: calc(100dvh - 40px); overflow: auto; background: var(--surface); border: 1px solid var(--line-2); border-radius: 18px; box-shadow: var(--shadow); animation: rise .22s ease; }
.modal.wide { width: min(980px, 100%); }
.modal-h { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; gap: 12px; padding: 18px 22px; background: var(--surface); border-bottom: 1px solid var(--line); }
.modal-h h3 { font-size: 1.55rem; flex: 1; }
.modal-b { padding: 22px; display: grid; gap: 16px; }
.modal-f { position: sticky; bottom: 0; display: flex; gap: 10px; justify-content: flex-end; padding: 16px 22px; background: var(--surface); border-top: 1px solid var(--line); flex-wrap: wrap; }
.toasts { position: fixed; z-index: 200; left: 50%; bottom: 24px; transform: translateX(-50%); display: grid; gap: 8px; width: min(420px, calc(100% - 32px)); pointer-events: none; }
.toast { background: var(--surface-3); border: 1px solid var(--line-2); border-left: 4px solid var(--ok); padding: 12px 16px; border-radius: 10px; box-shadow: var(--shadow); font-size: .94rem; animation: rise .2s ease; pointer-events: auto; }
.toast.error { border-left-color: var(--danger); }
@keyframes fade { from { opacity: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } }
@keyframes spin { to { transform: rotate(360deg); } }
.spinner { width: 22px; height: 22px; border: 2.5px solid var(--line-2); border-top-color: var(--accent); border-radius: 50%; animation: spin .7s linear infinite; }
.loading { display: grid; place-items: center; padding: 60px; }
.skeleton { background: linear-gradient(90deg, var(--surface) 25%, var(--surface-2) 50%, var(--surface) 75%); background-size: 200% 100%; animation: shimmer 1.3s infinite; border-radius: var(--radius); }
@keyframes shimmer { to { background-position: -200% 0; } }

/* Ejercicios (tarjeta compartida por app de socios y paneles) */
.ex-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.ex-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: grid; grid-template-rows: auto 1fr; cursor: pointer; text-align: left; padding: 0; transition: border-color .2s, transform .2s; }
.ex-card:hover { border-color: var(--line-2); transform: translateY(-2px); }
.ex-media { position: relative; aspect-ratio: 4 / 3; background: #fff; overflow: hidden; }
.ex-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: opacity .5s ease; }
.ex-media img + img { opacity: 0; }
.ex-media.play img + img { animation: swap 1.6s steps(1) infinite; }
.ex-card:hover .ex-media img + img, .ex-detail .ex-media img + img { animation: swap 1.6s steps(1) infinite; }
@keyframes swap { 0% { opacity: 0; } 50% { opacity: 1; } }
.ex-media .ph { position: absolute; inset: 0; display: grid; place-items: center; background: var(--surface-2); color: var(--faint); font-family: var(--f-display); text-transform: uppercase; letter-spacing: .1em; }
.ex-tag { position: absolute; left: 10px; top: 10px; z-index: 1; font-size: .7rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; padding: 4px 8px; border-radius: 6px; background: rgba(11, 11, 12, .82); color: #fff; }
.ex-body { padding: 14px; display: grid; gap: 6px; align-content: start; }
.ex-body strong { font-weight: 600; line-height: 1.3; font-size: .98rem; }
.ex-meta { display: flex; flex-wrap: wrap; gap: 6px; font-size: .78rem; color: var(--muted); }
.ex-meta span { padding: 2px 8px; border-radius: 6px; background: var(--surface-2); }
.ex-detail { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 22px; }
.ex-detail .ex-media { border-radius: 12px; }
.ex-steps { margin: 0; padding-left: 20px; display: grid; gap: 8px; color: var(--muted); }
.ex-steps li::marker { color: var(--accent); font-weight: 700; }

@media (max-width: 760px) {
  .grid-2, .grid-3, .ex-detail { grid-template-columns: minmax(0, 1fr); }
  .wrap { padding-inline: 16px; }
  .card { padding: 18px; }
  .modal-back { padding: 0; align-items: end; }
  .modal { border-radius: 18px 18px 0 0; max-height: 92dvh; }
  .ex-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .ex-body { padding: 11px; }
  .ex-body strong { font-size: .9rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}