/* ════════════════════════════════════════════════════
   GoFit — Estilos
   Dark mode atlético · Mobile-first · Sin dependencias
════════════════════════════════════════════════════ */

/* ── Reset & base ──────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #0a0a0f;
  --surface:  #1c1c2e;
  --border:   #2a2a40;
  --text:     #f0f0f5;
  --muted:    #8888aa;
  --accent:   #c8ff00;
  --orange:   #ff6b00;
  --error:    #ff4d4d;
  --success:  #00e676;
  --radius:   14px;
  --radius-sm:8px;
  --shadow:   0 4px 24px rgba(0,0,0,.45);
  --trans:    .22s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
}

/* ── Hero ──────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px 60px;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200,255,0,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,255,0,.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(200,255,0,.08);
  border: 1px solid rgba(200,255,0,.2);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 99px;
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .04em;
  margin-bottom: 28px;
}

.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .5; transform: scale(1.5); }
}

#hero h1 {
  font-size: clamp(4rem, 14vw, 9rem);
  font-weight: 900;
  letter-spacing: -.04em;
  line-height: 1;
  margin-bottom: 20px;
}

#hero h1 span { color: var(--accent); }

.hero-sub {
  max-width: 560px;
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--muted);
  margin-bottom: 36px;
}

.hero-sub strong { color: var(--text); }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: #000;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 14px 32px;
  border-radius: 99px;
  border: none;
  cursor: pointer;
  transition: transform var(--trans), box-shadow var(--trans);
  box-shadow: 0 0 28px rgba(200,255,0,.3);
  margin-bottom: 48px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(200,255,0,.45);
}

.hero-stats {
  display: flex;
  gap: clamp(24px, 4vw, 56px);
  flex-wrap: wrap;
  justify-content: center;
}

.stat-num {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 800;
  color: var(--accent);
}

.stat-label {
  font-size: .8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .06em;
}

/* ── Cómo funciona ─────────────────────────────── */
#como-funciona {
  padding: 80px 20px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.section-label {
  font-size: .8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.15;
}

.section-title span { color: var(--accent); }

.section-desc {
  color: var(--muted);
  margin-bottom: 48px;
  font-size: 1.05rem;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  text-align: left;
}

.step-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color var(--trans), transform var(--trans);
}

.step-card:hover {
  border-color: rgba(200,255,0,.35);
  transform: translateY(-3px);
}

.step-num {
  font-size: .75rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: .1em;
  margin-bottom: 10px;
}

.step-icon { font-size: 2rem; margin-bottom: 12px; }

.step-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-card p { color: var(--muted); font-size: .92rem; }

/* ── Formulario wizard ─────────────────────────── */
#formulario {
  padding: 60px 16px 80px;
  max-width: 720px;
  margin: 0 auto;
}

.wizard-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(20px, 4vw, 40px);
  box-shadow: var(--shadow);
}

/* Barra de progreso */
.progress-bar-wrap { margin-bottom: 36px; }

.progress-bar-track {
  height: 4px;
  background: var(--border);
  border-radius: 99px;
  margin-bottom: 14px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #aaff00);
  border-radius: 99px;
  transition: width .4s cubic-bezier(.4,0,.2,1);
}

.progress-steps {
  display: flex;
  justify-content: space-between;
  gap: 4px;
}

.prog-dot {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--border);
  color: var(--muted);
  font-size: .75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--trans), color var(--trans);
  flex-shrink: 0;
}

.prog-dot.active {
  background: var(--accent);
  color: #000;
  box-shadow: 0 0 12px rgba(200,255,0,.4);
}

.prog-dot.done {
  background: rgba(200,255,0,.2);
  color: var(--accent);
}

/* Pasos */
.wizard-step {
  display: none;
  animation: fadeIn .3s ease;
}

.wizard-step.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.step-header { margin-bottom: 28px; }

.step-tag {
  font-size: .75rem;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.step-header h2 {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 800;
  margin: 6px 0 8px;
}

.step-desc { color: var(--muted); font-size: .95rem; }

/* Labels */
.field-label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 12px;
}

.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }

.medidas-grupo-label {
  font-size: .75rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .07em;
  margin: 0 0 10px;
}

.req { color: var(--accent); }
.opt { color: var(--muted); font-weight: 400; font-size: .85em; }

/* Inputs */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.field { display: flex; flex-direction: column; gap: 6px; }

.field label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--muted);
}

.field input,
.field select {
  background: var(--bg);
  border: 1.5px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  transition: border-color var(--trans);
  width: 100%;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(200,255,0,.12);
}

.field-hint { font-size: .78rem; color: var(--muted); }

select option { background: var(--surface); color: var(--text); }

/* Tarjetas seleccionables */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 10px;
  margin-bottom: 4px;
}

.card-grid.three-col {
  grid-template-columns: repeat(3, 1fr);
}

.select-card {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 10px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--trans), background var(--trans), transform var(--trans);
  user-select: none;
}

.select-card:hover {
  border-color: rgba(200,255,0,.4);
  background: rgba(200,255,0,.04);
  transform: translateY(-1px);
}

.select-card.selected {
  border-color: var(--accent);
  background: rgba(200,255,0,.08);
  box-shadow: 0 0 16px rgba(200,255,0,.15);
}

.card-icon { font-size: 1.6rem; margin-bottom: 6px; line-height: 1; }
.card-label { font-size: .85rem; font-weight: 600; }
.card-sub { font-size: .73rem; color: var(--muted); margin-top: 3px; }

.select-card.small {
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.select-card.small span { font-size: .9rem; font-weight: 600; }

.inline-cards {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.inline-cards .select-card { flex: 1; min-width: 90px; }

/* Sliders */
.slider-group {
  margin-bottom: 24px;
}

.slider-group label {
  display: block;
  font-size: .9rem;
  color: var(--muted);
  margin-bottom: 10px;
}

.slider-group label strong { color: var(--accent); font-size: 1.1rem; }

.slider-group input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  height: 5px;
  border-radius: 99px;
  cursor: pointer;
  background: var(--border);
  border: none;
  padding: 0;
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: .75rem;
  color: var(--muted);
  margin-top: 6px;
}

/* Checkboxes */
.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
}

.check-card {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  cursor: pointer;
  transition: border-color var(--trans), background var(--trans);
  user-select: none;
  font-size: .88rem;
  font-weight: 500;
}

.check-card:hover { border-color: rgba(200,255,0,.35); }

.check-card.selected {
  border-color: var(--accent);
  background: rgba(200,255,0,.07);
}

.check-card input[type="checkbox"] { accent-color: var(--accent); }

/* Toggle medidas */
.toggle-medidas {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  background: rgba(200,255,0,.04);
  border: 2px solid rgba(200,255,0,.35);
  color: var(--text);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  transition: border-color var(--trans), background var(--trans), box-shadow var(--trans);
  margin: 20px 0 0;
}

.toggle-medidas:hover {
  border-color: var(--accent);
  background: rgba(200,255,0,.09);
  box-shadow: 0 0 20px rgba(200,255,0,.12);
}

.toggle-medidas-izq {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.toggle-medidas-icono { font-size: 1.5rem; line-height: 1; flex-shrink: 0; }

.toggle-medidas-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.toggle-medidas-info strong {
  font-size: .95rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
}

.toggle-medidas-sub { font-size: .78rem; color: var(--muted); }

.toggle-medidas-flecha {
  font-size: 1rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform var(--trans);
}

.medidas-panel { margin-top: 16px; }
.medidas-panel.hidden { display: none; }

/* Resumen */
.resumen-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 24px;
}

.resumen-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px 20px;
}

.res-item { display: flex; flex-direction: column; gap: 2px; }
.res-item span { font-size: .75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.res-item strong { font-size: .95rem; color: var(--text); }

/* Botón generar */
.btn-generar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  background: var(--accent);
  color: #000;
  font-weight: 800;
  font-size: 1.1rem;
  padding: 16px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform var(--trans), box-shadow var(--trans), opacity var(--trans);
  box-shadow: 0 0 28px rgba(200,255,0,.3);
  margin-bottom: 14px;
}

.btn-generar:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 44px rgba(200,255,0,.45);
}

.btn-generar:disabled {
  opacity: .5;
  cursor: not-allowed;
  transform: none;
}

.privacy-note { font-size: .78rem; color: var(--muted); text-align: center; }

/* Pago Fase 2 */
.pago-box {
  background: rgba(255,107,0,.06);
  border: 1px solid rgba(255,107,0,.3);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 20px;
  text-align: center;
}

.pago-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 16px; }

.btn-payphone {
  background: var(--orange);
  color: #fff;
  font-weight: 700;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity var(--trans);
}

.btn-payphone:hover { opacity: .85; }

/* Navegación wizard */
.wizard-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 24px;
  gap: 12px;
}

.btn-nav {
  background: var(--bg);
  border: 1.5px solid var(--border);
  color: var(--text);
  font-size: .9rem;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--trans), color var(--trans);
}

.btn-nav:hover { border-color: var(--accent); color: var(--accent); }

.btn-siguiente {
  margin-left: auto;
  background: rgba(200,255,0,.08);
  border-color: rgba(200,255,0,.35);
  color: var(--accent);
}

.btn-siguiente:hover {
  background: rgba(200,255,0,.15);
  border-color: var(--accent);
}

/* ── Loading overlay ───────────────────────────── */
#loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10,10,15,.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(8px);
}

#loading-overlay.hidden { display: none; }

.loading-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  max-width: 420px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow);
}

.spinner {
  width: 52px; height: 52px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-box h3 { font-size: 1.1rem; margin-bottom: 24px; color: var(--text); }

.loading-steps { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }

.load-step {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: .88rem;
  color: var(--muted);
  transition: all var(--trans);
  text-align: left;
}

.load-step.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(200,255,0,.06);
}

.load-step.done {
  border-color: rgba(200,255,0,.2);
  color: rgba(200,255,0,.5);
}

.loading-sub { font-size: .8rem; color: var(--muted); }

/* ── Resultado ─────────────────────────────────── */
#resultado-section {
  padding: 40px 16px 80px;
  max-width: 900px;
  margin: 0 auto;
}

#resultado-section.hidden { display: none; }

.resultado-header {
  text-align: center;
  margin-bottom: 28px;
  padding: 48px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.resultado-icono { font-size: 3.5rem; margin-bottom: 16px; line-height: 1; }

.resultado-header h2 { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 800; margin-bottom: 12px; }

.resultado-header p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 480px;
  margin: 0 auto 24px;
  line-height: 1.6;
}

.resultado-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.btn-secondary {
  background: var(--surface);
  border: 1.5px solid var(--border);
  color: var(--text);
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--trans), color var(--trans);
  font-size: .9rem;
}

.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ── Toast ─────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 13px 22px;
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-weight: 500;
  z-index: 2000;
  box-shadow: var(--shadow);
  max-width: 90vw;
  text-align: center;
  animation: slideUp .3s ease;
}

.toast.error  { border-color: var(--error);   color: var(--error);   }
.toast.success{ border-color: var(--success); color: var(--success); }
.toast.hidden { display: none; }

@keyframes slideUp {
  from { opacity: 0; transform: translateX(-50%) translateY(16px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── Footer ────────────────────────────────────── */
footer {
  text-align: center;
  padding: 32px 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .85rem;
}

footer p { margin-bottom: 4px; }
.footer-sub { font-size: .75rem; }

/* ── Utilidades ────────────────────────────────── */
.hidden { display: none !important; }

/* ── Responsive ────────────────────────────────── */
@media (max-width: 480px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid.three-col { grid-template-columns: repeat(3, 1fr); }
  .prog-dot { width: 22px; height: 22px; font-size: .65rem; }
  .form-grid { grid-template-columns: 1fr; }
  #rutina-iframe { min-height: 70vh; }
}

@media (max-width: 360px) {
  .card-grid.three-col { grid-template-columns: repeat(2, 1fr); }
  .checkbox-grid { grid-template-columns: 1fr 1fr; }
}