/* ============================================
   Escuela de Guitarra Juan Nieva — estilos base
   Paleta y reglas: ver CLAUDE.md §7
   ============================================ */

:root {
  --fondo: #0A0E1A;
  --fondo-2: #111827;
  --naranja: #FF7A1A;
  --azul: #3B82F6;
  --celeste: #38BDF8;
  --texto: #F8FAFC;
  --texto-2: #94A3B8;
  --glass: rgba(255, 255, 255, 0.04);
  --glass-borde: rgba(255, 255, 255, 0.08);
  --radio: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  background: var(--fondo);
  color: var(--texto);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .titulo {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.seccion { padding: 4.5rem 1.25rem; }
.contenedor { max-width: 1100px; margin: 0 auto; }

.sub-seccion {
  color: var(--texto-2);
  max-width: 640px;
  margin-bottom: 2.5rem;
}

.acento { color: var(--naranja); }
.acento-azul { color: var(--celeste); }

/* ---------- Header ---------- */

.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-borde);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1.25rem;
}

.logo {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--texto);
  text-decoration: none;
}

.logo span { color: var(--naranja); }

.nav {
  display: none;
  gap: 1.4rem;
}

.nav a {
  color: var(--texto-2);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color 0.2s;
}

.nav a:hover { color: var(--naranja); }

.nav-toggle {
  background: none;
  border: 1px solid var(--glass-borde);
  border-radius: 8px;
  color: var(--texto);
  font-size: 1.3rem;
  padding: 0.2rem 0.6rem;
  cursor: pointer;
}

@media (min-width: 860px) {
  .nav { display: flex; }
  .nav-toggle { display: none; }
}

.nav-movil {
  display: none;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.5rem 1.25rem 1rem;
  border-top: 1px solid var(--glass-borde);
}

.nav-movil.abierto { display: flex; }

.nav-movil a {
  color: var(--texto-2);
  text-decoration: none;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.9rem;
  padding: 0.55rem 0;
}

/* Botón Iniciar sesión (placeholder — sistema de usuarios en Fase 4) */
.nav a.nav-login {
  color: var(--texto);
  border: 1px solid var(--naranja);
  border-radius: 100px;
  padding: 0.35rem 1rem;
}

.nav a.nav-login:hover { background: var(--naranja); color: var(--fondo); }

.nav-movil a.nav-login { color: var(--naranja); }

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

.btn {
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.9rem;
  padding: 0.85rem 1.7rem;
  border-radius: 10px;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: transform 0.15s, box-shadow 0.15s, background 0.2s;
}

.btn-naranja {
  background: var(--naranja);
  color: #0A0E1A;
}

.btn-naranja:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255, 122, 26, 0.35);
}

.btn-fantasma {
  background: transparent;
  color: var(--texto);
  border: 1px solid var(--glass-borde);
}

.btn-fantasma:hover { border-color: var(--celeste); color: var(--celeste); }

/* Botón de pago sin definir — regla CLAUDE.md §6 */
.btn-revision {
  background: repeating-linear-gradient(45deg, #1c2433, #1c2433 10px, #232d40 10px, #232d40 20px);
  color: var(--texto-2);
  border: 1px dashed var(--texto-2);
  cursor: not-allowed;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 8.5rem 1.25rem 5rem;
  text-align: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse 60% 40% at 70% 10%, rgba(59, 130, 246, 0.12), transparent),
    radial-gradient(ellipse 50% 35% at 20% 80%, rgba(255, 122, 26, 0.08), transparent);
}

.hero-contenido { position: relative; max-width: 780px; margin: 0 auto; }

.hero p.hero-marca {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: clamp(1rem, 3vw, 1.35rem);
  letter-spacing: 0.04em;
  color: var(--naranja);
  margin: 0 auto 1.4rem;
  max-width: none;
}

.hero h1 {
  font-size: clamp(1.9rem, 6vw, 3.4rem);
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}

.hero p {
  color: var(--texto-2);
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  max-width: 560px;
  margin: 0 auto 2.2rem;
}

.hero-botones {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  justify-content: center;
}

.credenciales {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem 2rem;
  margin-top: 3.2rem;
  color: var(--texto-2);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.credenciales li { list-style: none; }
.credenciales li::before { content: "◆ "; color: var(--naranja); font-size: 0.7em; }

/* ---------- Video de bienvenida ---------- */

.seccion-video { padding-top: 1rem; }

.video-caja {
  aspect-ratio: 16 / 9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  background: var(--fondo-2);
  border: 1px dashed var(--glass-borde);
  border-radius: var(--radio);
  margin-top: 2rem;
  color: var(--texto-2);
}

.video-caja iframe {
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: var(--radio);
}

.video-play {
  width: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 122, 26, 0.15);
  border: 2px solid var(--naranja);
  color: var(--naranja);
  font-size: 1.6rem;
  padding-left: 5px;
}

.video-caja p { font-size: 0.95rem; text-align: center; }
.video-caja p span { font-size: 0.78rem; opacity: 0.7; }

/* ---------- Cards genéricas ---------- */

.grilla {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) { .grilla-2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { .grilla-4 { grid-template-columns: repeat(4, 1fr); } .grilla-3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 640px) and (max-width: 899px) { .grilla-4, .grilla-3 { grid-template-columns: 1fr 1fr; } }

.card {
  background: var(--glass);
  border: 1px solid var(--glass-borde);
  border-radius: var(--radio);
  padding: 1.6rem;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover { border-color: rgba(56, 189, 248, 0.4); transform: translateY(-3px); }

.card h3 {
  font-size: 1.05rem;
  text-transform: uppercase;
  margin: 0.6rem 0;
}

.card p { color: var(--texto-2); font-size: 0.92rem; }

.card-icono { font-size: 1.6rem; }

/* ---------- Firma visual JNGuitarra ----------
   Diferenciador vs. Frogames (bordes redondeados uniformes): TODAS las cajas
   llevan la esquina superior-izquierda "marcada" — radio recto + escuadra naranja.
   Evoca la púa / el traste. Sutil pero reconocible. Ver CLAUDE.md §7. */
.card, .curso-card {
  border-radius: 3px 16px 16px 16px;
  position: relative;
}

.card::after {
  content: '';
  position: absolute;
  top: 11px;
  left: 11px;
  width: 14px;
  height: 14px;
  border-top: 2px solid var(--naranja);
  border-left: 2px solid var(--naranja);
  border-top-left-radius: 3px;
  opacity: 0.55;
  transition: opacity 0.2s;
  pointer-events: none;
}

.card:hover::after { opacity: 1; }

/* ---------- Catálogo ---------- */

.curso-card {
  display: flex;
  flex-direction: column;
  background: var(--fondo-2);
  border: 1px solid var(--glass-borde);
  border-radius: var(--radio);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}

.curso-card:hover { border-color: rgba(255, 122, 26, 0.45); transform: translateY(-3px); }

.curso-portada {
  height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.6rem;
  background:
    linear-gradient(160deg, rgba(59, 130, 246, 0.15), rgba(10, 14, 26, 0.9)),
    radial-gradient(circle at 30% 30%, rgba(255, 122, 26, 0.18), transparent 60%);
  border-bottom: 1px solid var(--glass-borde);
}

.curso-cuerpo { padding: 1.3rem; display: flex; flex-direction: column; gap: 0.7rem; flex: 1; }

.curso-cuerpo h3 { font-size: 1rem; text-transform: uppercase; }

.curso-cuerpo p { color: var(--texto-2); font-size: 0.88rem; flex: 1; }

.badge {
  align-self: flex-start;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.7rem;
  border-radius: 100px;
}

.badge-vivo { background: rgba(255, 122, 26, 0.15); color: var(--naranja); border: 1px solid rgba(255, 122, 26, 0.4); }
.badge-proximamente { background: rgba(56, 189, 248, 0.12); color: var(--celeste); border: 1px solid rgba(56, 189, 248, 0.35); }
.badge-pregrabado { background: rgba(148, 163, 184, 0.12); color: var(--texto-2); border: 1px solid rgba(148, 163, 184, 0.3); }

.curso-cuerpo .btn { width: 100%; font-size: 0.8rem; padding: 0.75rem 1rem; }

/* ---------- Banda de feedback (diferencial) ---------- */

.banda-feedback {
  padding: 3.5rem 1.25rem;
  text-align: center;
  background:
    radial-gradient(ellipse 70% 120% at 50% 0%, rgba(255, 122, 26, 0.1), transparent),
    var(--fondo-2);
  border-top: 1px solid var(--glass-borde);
  border-bottom: 1px solid var(--glass-borde);
}

.banda-feedback-texto {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: clamp(1.4rem, 4.5vw, 2.3rem);
  line-height: 1.25;
  max-width: 820px;
  margin: 0 auto;
  text-transform: none;
}

.banda-feedback-sub {
  color: var(--texto-2);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  margin: 1rem auto 0;
  max-width: 620px;
}

/* ---------- Rutas (grilla simple) ---------- */

.seccion-rutas { background: var(--fondo-2); }

.ruta-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: var(--glass);
  border: 1px solid var(--glass-borde);
  border-left: 3px solid transparent;
  border-radius: 3px 16px 16px 16px;
  padding: 1.5rem;
  text-decoration: none;
  color: var(--texto);
  transition: border-color 0.2s, transform 0.2s;
}

.ruta-card:hover { transform: translateY(-3px); }

.ruta-naranja { border-left-color: var(--naranja); }
.ruta-naranja:hover { border-color: rgba(255, 122, 26, 0.5); border-left-color: var(--naranja); }

.ruta-azul { border-left-color: var(--celeste); }
.ruta-azul:hover { border-color: rgba(56, 189, 248, 0.5); border-left-color: var(--celeste); }

.ruta-card h3 { font-size: 1rem; text-transform: uppercase; }

.ruta-card p { color: var(--texto-2); font-size: 0.88rem; }

.ruta-nivel {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--texto-2);
}

/* ---------- Sobre Juan ---------- */

.sobre {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 800px) { .sobre { grid-template-columns: 300px 1fr; } }

.sobre-foto {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radio);
  border: 1px solid var(--glass-borde);
  filter: saturate(0.75);
}

.cita {
  border-left: 3px solid var(--naranja);
  padding-left: 1rem;
  margin: 1.3rem 0;
  font-style: italic;
  color: var(--texto);
  font-size: 1.05rem;
}

/* ---------- Footer ---------- */

.footer {
  border-top: 1px solid var(--glass-borde);
  padding: 3rem 1.25rem 2rem;
  text-align: center;
  color: var(--texto-2);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.footer-links a { color: var(--texto-2); text-decoration: none; }
.footer-links a:hover { color: var(--naranja); }

/* ============================================
   Optimización mobile (el tráfico llega del celular)
   ============================================ */

@media (max-width: 768px) {
  .seccion { padding: 3rem 1.1rem; }
  .hero { padding: 6.5rem 1.1rem 3.2rem; }
  .credenciales { gap: 0.5rem 1.2rem; margin-top: 2.2rem; }
  .banda-feedback { padding: 2.6rem 1.1rem; }
  .footer-links { gap: 1rem 1.3rem; }
}

@media (max-width: 600px) {
  /* Logo del header: achicar para que no choque con el botón de menú */
  .header-inner { padding: 0.7rem 1rem; }
  .logo { font-size: 0.72rem; letter-spacing: 0.03em; }

  /* Botones a lo ancho para que sean fáciles de tocar con el dedo */
  .hero-botones { flex-direction: column; align-items: stretch; }
  .hero-botones .btn { width: 100%; }
  .btn { padding: 0.95rem 1.6rem; }

  /* Grillas siempre en una columna, sin quedar apretadas */
  .grilla-3, .grilla-4, .grilla-2 { grid-template-columns: 1fr; }
}