/* ============================================================
   TEMA: Hierro y Tiza — inspirado en barras de acero, tiza de
   magnesio y el tablero donde se apuntan las series.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@500;700&display=swap');

:root {
  --bg-void: #15181a;
  --surface: #1f2325;
  --surface-raised: #292d30;
  --surface-line: #383d40;

  --chalk: #eceae4;
  --chalk-muted: #97a0a6;

  --accent-gold: #d4a017;     /* logros / PRs / racha */
  --accent-steel: #4d84a8;    /* accion principal / tiron */
  --accent-rust: #c1543f;     /* empuje */
  --accent-olive: #6d9457;    /* piernas */
  --accent-violet: #8d7fc0;   /* movilidad */

  --font-display: 'Bebas Neue', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 6px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg-void);
  background-image:
    radial-gradient(circle at 20% 10%, rgba(255,255,255,0.02), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(255,255,255,0.015), transparent 40%);
  color: var(--chalk);
  font-family: var(--font-body);
  min-height: 100vh;
}

button {
  font-family: var(--font-body);
  cursor: pointer;
}

button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

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

.app-shell {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 96px;
}

.topbar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--surface-line);
  padding-bottom: 14px;
}

.topbar h1 {
  font-family: var(--font-display);
  font-size: 34px;
  letter-spacing: 0.5px;
  margin: 0;
  color: var(--chalk);
}

.topbar h1 span {
  color: var(--accent-gold);
}

.topbar .streak {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--chalk-muted);
  text-align: right;
}
.topbar .streak strong {
  color: var(--accent-gold);
  font-size: 18px;
}

/* ---------- Navegacion inferior ---------- */

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface);
  border-top: 1px solid var(--surface-line);
  display: flex;
  justify-content: space-around;
  padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
  z-index: 50;
}

.bottom-nav button {
  background: none;
  border: none;
  color: var(--chalk-muted);
  font-size: 11px;
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0.3px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border-radius: var(--radius);
  transition: color 0.15s ease;
}

.bottom-nav button .icon { width: 22px; height: 22px; }
.bottom-nav button svg.icon { transition: transform 0.15s ease; }
.bottom-nav button.active svg.icon { transform: translateY(-1px); }

.bottom-nav button.active {
  color: var(--accent-gold);
}

/* ---------- Vistas ---------- */

.view { display: none; }
.view.active { display: block; animation: view-fade-in 0.22s ease; }

@keyframes view-fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-title {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.4px;
  margin: 28px 0 12px;
  color: var(--chalk);
}
.section-title:first-child { margin-top: 0; }

/* ---------- Tarjetas ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--surface-line);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  transition: transform 0.1s ease, border-color 0.15s ease;
}
.card[onclick]:active {
  transform: scale(0.98);
  border-color: var(--chalk-muted);
}

.card-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card h3 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 600;
}

.card p {
  margin: 0;
  color: var(--chalk-muted);
  font-size: 13px;
  line-height: 1.5;
}

.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.badge.empuje    { background: rgba(193,84,63,0.15); color: var(--accent-rust); }
.badge.tiron     { background: rgba(77,132,168,0.15); color: var(--accent-steel); }
.badge.piernas   { background: rgba(109,148,87,0.15); color: var(--accent-olive); }
.badge.core      { background: rgba(212,160,23,0.15); color: var(--accent-gold); }
.badge.movilidad { background: rgba(141,127,192,0.15); color: var(--accent-violet); }
.badge.cardio    { background: rgba(236,234,228,0.12); color: var(--chalk-muted); }

.difficulty-dots { display: inline-flex; gap: 3px; vertical-align: middle; }
.difficulty-dots span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--surface-line);
  display: inline-block;
}
.difficulty-dots span.filled { background: var(--accent-gold); }

/* ---------- Botones ---------- */

.btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--surface-line);
  background: var(--surface-raised);
  color: var(--chalk);
  transition: border-color 0.15s ease, transform 0.1s ease;
}
.btn:hover { border-color: var(--chalk-muted); }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent-gold);
  color: #1a1a1a;
  border-color: var(--accent-gold);
}
.btn-primary:hover { background: #e3ac1f; border-color: #e3ac1f; }

.btn-ghost {
  background: none;
  border: 1px solid var(--surface-line);
}

.btn-small { padding: 6px 12px; font-size: 12px; }

.btn-block { width: 100%; }

/* ---------- Formularios ---------- */

input, select, textarea {
  font-family: var(--font-body);
  background: var(--surface-raised);
  border: 1px solid var(--surface-line);
  color: var(--chalk);
  border-radius: var(--radius);
  padding: 9px 12px;
  font-size: 14px;
  width: 100%;
}

label {
  display: block;
  font-size: 12px;
  color: var(--chalk-muted);
  margin-bottom: 4px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.field { margin-bottom: 14px; }

/* ---------- Entrenamiento en curso ---------- */

.exercise-runner {
  background: var(--surface);
  border: 1px solid var(--surface-line);
  border-radius: var(--radius);
  padding: 20px;
}

.exercise-runner .ex-name {
  font-family: var(--font-display);
  font-size: 28px;
  letter-spacing: 0.3px;
  margin: 4px 0 2px;
}

.set-tracker {
  display: flex;
  gap: 8px;
  margin: 16px 0;
  flex-wrap: wrap;
}

.set-pill {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  padding: 8px 14px;
  border-radius: 20px;
  border: 1px solid var(--surface-line);
  background: var(--surface-raised);
  color: var(--chalk-muted);
}
.set-pill.done {
  background: rgba(212,160,23,0.15);
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.input-row {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
}
.input-row .field { flex: 1; margin-bottom: 0; }

/* ---------- Anillos de progreso (elemento distintivo) ---------- */

.ring-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: 16px;
  margin-bottom: 8px;
}

.ring-item { text-align: center; }

.ring-item svg { width: 72px; height: 72px; }

.ring-item .ring-label {
  font-size: 11px;
  color: var(--chalk-muted);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  font-weight: 600;
}
.ring-item .ring-value {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

/* ---------- Modal sustitucion de ejercicio ---------- */

.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.65);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal-backdrop.active { display: flex; animation: backdrop-fade-in 0.18s ease; }

@keyframes backdrop-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-sheet {
  background: var(--surface);
  border: 1px solid var(--surface-line);
  border-radius: 16px;
  max-width: 480px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 24px 20px calc(20px + env(safe-area-inset-bottom));
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  animation: sheet-pop-in 0.2s cubic-bezier(0.2, 0.8, 0.3, 1);
}

@keyframes sheet-pop-in {
  from { opacity: 0; transform: scale(0.94) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-sheet h2 {
  font-family: var(--font-display);
  font-size: 22px;
  margin: 0 0 4px;
}
.modal-sheet .modal-sub {
  color: var(--chalk-muted);
  font-size: 13px;
  margin-bottom: 16px;
}

.alt-option {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--surface-line);
  border-radius: var(--radius);
  margin-bottom: 8px;
  background: var(--surface-raised);
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 8px;
}
.photo-grid .photo-thumb {
  aspect-ratio: 3/4;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--surface-line);
  cursor: pointer;
  position: relative;
}
.photo-grid .photo-thumb img {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.photo-grid .photo-thumb .photo-date {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: rgba(0,0,0,0.6);
  color: var(--chalk);
  font-size: 10px;
  padding: 3px 4px;
  text-align: center;
  font-family: var(--font-mono);
}

.avatar-swatch-row {
  display: flex;
  gap: 10px;
  margin-top: 6px;
}
.avatar-swatch {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
}
.avatar-swatch.selected {
  border-color: var(--chalk);
}

.topbar-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: 14px;
  color: #1a1a1a;
  margin-right: 8px;
  vertical-align: middle;
}

.ai-coach-card {
  background: linear-gradient(135deg, rgba(77,132,168,0.12), rgba(212,160,23,0.08));
  border: 1px solid var(--accent-steel);
  border-radius: var(--radius);
  padding: 16px;
}
.ai-coach-card .ai-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--accent-steel);
  border: 1px solid var(--accent-steel);
  border-radius: 10px;
  padding: 2px 8px;
  margin-bottom: 8px;
}
.ai-coach-card .ai-adjustment {
  border-left: 2px solid var(--accent-gold);
  padding-left: 10px;
  margin: 8px 0;
  font-size: 13px;
}

/* ---------- Autenticacion ---------- */

.auth-box {
  max-width: 360px;
  margin: 10vh auto 0;
}

.auth-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.auth-tab {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--surface-line);
  color: var(--chalk-muted);
  padding: 10px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 13px;
}
.auth-tab.active {
  background: var(--accent-gold);
  color: #1a1a1a;
  border-color: var(--accent-gold);
}

/* ---------- Cuestionario ---------- */

.injury-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-top: 6px;
}

.injury-check {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-raised);
  border: 1px solid var(--surface-line);
  border-radius: var(--radius);
  padding: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--chalk);
  cursor: pointer;
}
.injury-check input { width: auto; }

/* ---------- Calendario ---------- */

.week-strip {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  margin-bottom: 8px;
}

.day-chip {
  background: var(--surface);
  border: 1px solid var(--surface-line);
  border-radius: var(--radius);
  padding: 10px 4px;
  text-align: center;
  cursor: pointer;
}
.day-chip.today {
  border-color: var(--accent-gold);
}
.day-chip.selected {
  background: var(--surface-raised);
  box-shadow: inset 0 0 0 2px var(--chalk-muted);
}
.day-chip .day-chip-name {
  font-size: 10px;
  color: var(--chalk-muted);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.3px;
}
.day-chip .day-chip-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  margin: 6px auto 0;
  background: var(--surface-line);
}
.day-chip.has-routine .day-chip-dot {
  background: var(--accent-gold);
}

.day-exercise-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.day-exercise-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--surface-line);
  font-size: 13px;
}
.day-exercise-item:last-child { border-bottom: none; }

.calendar-toggle {
  display: flex;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--surface-line);
  border-radius: var(--radius);
  padding: 3px;
}
.calendar-toggle button {
  background: none;
  border: none;
  color: var(--chalk-muted);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 4px;
}
.calendar-toggle button.active {
  background: var(--accent-gold);
  color: #1a1a1a;
}

.month-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}
.month-day {
  aspect-ratio: 1;
  border-radius: 4px;
  background: var(--surface);
  border: 1px solid var(--surface-line);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--chalk-muted);
  position: relative;
}
.month-day.today { border-color: var(--accent-gold); }
.month-day.scheduled { color: var(--chalk); }
.month-day.completed { background: rgba(212,160,23,0.18); }
.month-day .month-day-dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent-gold);
  margin-top: 2px;
}
.month-day.empty { border: none; background: none; }

/* ---------- Detalle de ejercicio ---------- */

.detail-illustration {
  width: 100%;
  max-width: 100%;
  margin: 0 auto 4px;
  display: block;
  background: var(--surface-raised);
  border-radius: var(--radius);
  padding: 14px 10px;
}
.detail-illustration svg { width: 100%; height: auto; display: block; }

.illustration-caption {
  text-align: center;
  font-size: 12px;
  color: var(--chalk-muted);
  margin: 0 0 16px;
  font-style: italic;
}

.video-wrapper {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 */
  margin: 16px 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
}
.video-wrapper iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: none;
}

.detail-section-title {
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.3px;
  margin: 18px 0 8px;
  color: var(--accent-gold);
}

.steps-list, .mistakes-list {
  margin: 0;
  padding-left: 20px;
  color: var(--chalk);
  font-size: 14px;
  line-height: 1.6;
}
.mistakes-list { color: var(--chalk-muted); }
.steps-list li, .mistakes-list li { margin-bottom: 6px; }

.detail-close-btn {
  position: sticky;
  top: 0;
  float: right;
  background: var(--surface-raised);
  border: 1px solid var(--surface-line);
  color: var(--chalk-muted);
  border-radius: 50%;
  width: 32px; height: 32px;
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
}

.reminder-banner {
  background: rgba(212,160,23,0.12);
  border: 1px solid var(--accent-gold);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--chalk);
}

.dashboard-row {
  margin-bottom: 20px;
}
.hero-stat {
  background: var(--surface);
  border: 1px solid var(--surface-line);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.hero-ring {
  width: 120px;
  height: 120px;
  flex-shrink: 0;
}
.hero-side-stats {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.hero-mini-stat { border-left: 3px solid var(--surface-line); padding-left: 12px; }
.hero-mini-value {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--chalk);
  line-height: 1;
}
.hero-mini-label {
  font-size: 11px;
  color: var(--chalk-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  margin-top: 3px;
}

.progression-card {
  background: var(--surface);
  border: 1px solid var(--accent-gold);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 12px;
}
.progression-card .prog-arrow { color: var(--accent-gold); margin: 0 6px; }

/* ---------- Vacio / estado inicial ---------- */

.empty-state {
  text-align: center;
  padding: 40px 16px;
  color: var(--chalk-muted);
}
.empty-state .icon { font-size: 32px; margin-bottom: 8px; }

/* ---------- Utilidades ---------- */

.muted { color: var(--chalk-muted); }
.mono { font-family: var(--font-mono); }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-8 { gap: 8px; }
.mt-16 { margin-top: 16px; }
.hidden { display: none !important; }