/* ============================================================
   LibreIPTV — Landing Page
   Paleta oficial extraída de LibreIPTVColors.kt
   ============================================================ */

/* ── Variables de marca ──────────────────────────────────── */
:root {
  --bg-base:        #0A111A;
  --bg-sidebar:     #0E1722;
  --bg-surface:     #16212E;
  --bg-surface-alt: #1C2A3A;
  --accent:         #4A90D9;
  --accent-hover:   #5BA3EC;
  --accent-glow:    rgba(74, 144, 217, 0.25);
  --accent-subtle:  rgba(74, 144, 217, 0.12);
  --text-primary:   #FFFFFF;
  --text-secondary: #A8B8C8;
  --text-tertiary:  #6A7F94;
  --text-disabled:  #3D5166;
  --status-active:  #4CAF50;
  --star-color:     #FFC107;
  --border-subtle:  rgba(74, 144, 217, 0.18);
  --border-hover:   rgba(74, 144, 217, 0.55);
  --radius-sm:      8px;
  --radius-md:      14px;
  --radius-lg:      20px;
  --shadow-card:    0 4px 24px rgba(0,0,0,0.45);
  --shadow-glow:    0 0 28px var(--accent-glow);
  --transition:     0.22s ease;
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a  { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
button { cursor: pointer; border: none; font-family: inherit; }

/* ── Utilidades ──────────────────────────────────────────── */
.container      { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.section-title  { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; text-align: center; margin-bottom: 0.5rem; }
.section-sub    { font-size: 1rem; color: var(--text-secondary); text-align: center; margin-bottom: 3rem; }
.badge          { display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.35rem 0.9rem; border-radius: 999px; font-size: 0.82rem; font-weight: 600; }
.badge-accent   { background: var(--accent-subtle); color: var(--accent); border: 1px solid var(--border-subtle); }
.badge-green    { background: rgba(76, 175, 80, 0.12); color: var(--status-active); border: 1px solid rgba(76,175,80,0.25); }
.sr-only        { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ── Barra de navegación ─────────────────────────────────── */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10, 17, 26, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 1.5rem;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand {
  display: flex; align-items: center; gap: 0.65rem;
  font-size: 1.1rem; font-weight: 700; color: var(--text-primary);
  text-decoration: none;
}
.nav-brand img { width: 36px; height: 36px; object-fit: contain; }
.nav-links {
  display: flex; align-items: center; gap: 1.75rem;
  list-style: none;
}
.nav-links a {
  font-size: 0.9rem; color: var(--text-secondary); font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-cta {
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem; font-weight: 600;
  transition: background var(--transition), box-shadow var(--transition);
}
.nav-cta:hover { background: var(--accent-hover); box-shadow: var(--shadow-glow); color: #fff; }

/* Hamburguesa (móvil) */
#nav-toggle { display: none; }
.nav-hamburger {
  display: none; background: none; border: none;
  color: var(--text-secondary); font-size: 1.5rem;
  padding: 0.4rem; cursor: pointer;
}

/* ── Sección hero ────────────────────────────────────────── */
#inicio {
  position: relative; overflow: hidden;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 100px 1.5rem 80px;
  text-align: center;
}
/* Fondo animado */
#inicio::before,
#inicio::after {
  content: ''; position: absolute; border-radius: 50%;
  pointer-events: none;
}
#inicio::before {
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(74,144,217,0.18) 0%, transparent 70%);
  top: -200px; left: -200px;
  animation: orbFloat 14s ease-in-out infinite alternate;
}
#inicio::after {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(74,144,217,0.12) 0%, transparent 70%);
  bottom: -100px; right: -100px;
  animation: orbFloat 18s ease-in-out infinite alternate-reverse;
}
@keyframes orbFloat {
  from { transform: translate(0,0) scale(1);   }
  to   { transform: translate(40px,30px) scale(1.12); }
}
.hero-grid {
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(74,144,217,0.1) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.hero-content {
  position: relative; z-index: 1;
  max-width: 780px; margin: 0 auto;
}
.hero-logo {
  width: 120px; margin: 0 auto 1.5rem;
  filter: drop-shadow(0 0 20px rgba(74,144,217,0.5));
  animation: logoFloat 5s ease-in-out infinite;
}
@keyframes logoFloat {
  0%,100% { transform: translateY(0);   }
  50%      { transform: translateY(-8px); }
}
.hero-title {
  font-size: clamp(2.8rem, 7vw, 5rem); font-weight: 800;
  line-height: 1.1; letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff 30%, var(--accent-hover) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}
.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary); max-width: 540px; margin: 0 auto 1.75rem;
}
.hero-badges {
  display: flex; flex-wrap: wrap; gap: 0.65rem;
  justify-content: center; margin-bottom: 2.25rem;
}
.hero-actions {
  display: flex; flex-direction: column; align-items: center; gap: 0.85rem;
}
.btn-download {
  display: inline-flex; align-items: center; gap: 0.6rem;
  background: var(--accent);
  color: #fff; font-size: 1.05rem; font-weight: 700;
  padding: 0.9rem 2.2rem; border-radius: var(--radius-md);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
  animation: glow-pulse 3s ease-in-out infinite;
}
.btn-download:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 40px rgba(74,144,217,0.55);
  transform: translateY(-2px);
  color: #fff;
}
.btn-download:active { transform: translateY(0); }
@keyframes glow-pulse {
  0%,100% { box-shadow: 0 0 18px rgba(74,144,217,0.3); }
  50%      { box-shadow: 0 0 38px rgba(74,144,217,0.55); }
}
.download-counter {
  font-size: 0.88rem; color: var(--text-tertiary);
  display: flex; align-items: center; gap: 0.4rem;
}
.counter-number {
  color: var(--text-secondary); font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ── Características ─────────────────────────────────────── */
#caracteristicas { padding: 90px 0; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}
.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 1.5rem 1.5rem 1.75rem;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.feature-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.feature-icon {
  font-size: 2rem; margin-bottom: 0.75rem;
  display: block; line-height: 1;
}
.feature-title {
  font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem;
}
.feature-desc {
  font-size: 0.88rem; color: var(--text-secondary); line-height: 1.55;
}

/* ── Capturas ────────────────────────────────────────────── */
#capturas {
  padding: 80px 0 100px;
  background: linear-gradient(180deg, var(--bg-base) 0%, var(--bg-sidebar) 50%, var(--bg-base) 100%);
}
.screenshot-wrapper {
  max-width: 900px; margin: 0 auto; position: relative;
}
.device-frame {
  background: var(--bg-sidebar);
  border-radius: var(--radius-lg);
  padding: 16px;
  border: 1.5px solid var(--border-hover);
  box-shadow: 0 0 60px rgba(74,144,217,0.2), var(--shadow-card);
  overflow: hidden;
}
.device-frame img { border-radius: var(--radius-sm); width: 100%; }
.device-label {
  text-align: center; margin-top: 1.2rem;
  font-size: 0.85rem; color: var(--text-tertiary);
  display: flex; align-items: center; justify-content: center; gap: 0.5rem;
}
.device-label::before,
.device-label::after { content: ''; flex: 1; height: 1px; background: var(--border-subtle); max-width: 120px; }

/* ── Descarga e instalación ──────────────────────────────── */
#descargar { padding: 90px 0; }
.download-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem; margin-bottom: 2.5rem;
}
.download-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 2rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.download-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-glow); }
.download-card-icon { font-size: 2.5rem; margin-bottom: 0.75rem; display: block; }
.download-card-title {
  font-size: 1.2rem; font-weight: 700; margin-bottom: 0.4rem;
}
.download-card-subtitle {
  font-size: 0.85rem; color: var(--text-tertiary); margin-bottom: 1.25rem;
}
.steps { list-style: none; display: flex; flex-direction: column; gap: 0.65rem; }
.steps li {
  display: flex; align-items: flex-start; gap: 0.75rem;
  font-size: 0.9rem; color: var(--text-secondary);
}
.step-num {
  flex-shrink: 0; width: 24px; height: 24px;
  background: var(--accent-subtle); border: 1px solid var(--border-subtle);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700; color: var(--accent); margin-top: 1px;
}
.step-code {
  background: var(--bg-surface-alt);
  color: var(--accent-hover); padding: 0.2rem 0.5rem;
  border-radius: 4px; font-family: 'Courier New', monospace; font-size: 0.82rem;
  word-break: break-all;
}
.download-cta-center { text-align: center; margin-top: 0.5rem; }
.btn-outline {
  display: inline-flex; align-items: center; gap: 0.5rem;
  border: 1.5px solid var(--accent); color: var(--accent);
  padding: 0.7rem 1.8rem; border-radius: var(--radius-sm);
  font-size: 0.95rem; font-weight: 600; background: transparent;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}
.btn-outline:hover {
  background: var(--accent-subtle); box-shadow: var(--shadow-glow); color: var(--accent-hover);
}

/* ── Opiniones ───────────────────────────────────────────── */
#opiniones { padding: 90px 0; background: var(--bg-sidebar); }
.reviews-layout {
  display: grid; grid-template-columns: 1fr 1fr; gap: 3rem;
  align-items: start;
}
.reviews-list { display: flex; flex-direction: column; gap: 1rem; }
.review-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 1.25rem 1.5rem;
}
.review-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 0.5rem; flex-wrap: wrap; gap: 0.5rem;
}
.review-name { font-weight: 700; font-size: 0.95rem; }
.review-meta { font-size: 0.78rem; color: var(--text-tertiary); }
.review-stars { color: var(--star-color); letter-spacing: 1px; font-size: 1rem; }
.review-stars .empty { color: var(--text-disabled); }
.review-comment { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.55; }
.reviews-empty { color: var(--text-tertiary); font-size: 0.9rem; padding: 1rem 0; }
.reviews-loading { color: var(--text-tertiary); font-size: 0.9rem; }

/* ── Formulario de reseña ────────────────────────────────── */
.review-form-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 1.75rem;
  position: sticky; top: 80px;
}
.review-form-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 1.25rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1rem; }
.form-label { font-size: 0.85rem; color: var(--text-secondary); font-weight: 500; }
.form-input,
.form-textarea {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm); padding: 0.65rem 0.9rem;
  color: var(--text-primary); font-size: 0.92rem; font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
.form-input:focus,
.form-textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(74,144,217,0.18);
}
.form-textarea { resize: vertical; min-height: 100px; }
.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-disabled); }

/* Selector de estrellas */
.star-picker {
  display: flex; gap: 0.25rem; margin-top: 0.25rem;
}
.star-btn {
  background: none; border: none; padding: 0;
  font-size: 1.8rem; color: var(--text-disabled);
  cursor: pointer; transition: color var(--transition), transform var(--transition);
  line-height: 1;
}
.star-btn:hover  { transform: scale(1.15); }
.star-btn.active { color: var(--star-color); }

.char-count { font-size: 0.75rem; color: var(--text-tertiary); text-align: right; }
.btn-submit {
  width: 100%;
  background: var(--accent); color: #fff;
  padding: 0.75rem; border-radius: var(--radius-sm);
  font-size: 0.95rem; font-weight: 700;
  transition: background var(--transition), box-shadow var(--transition);
  margin-top: 0.5rem;
}
.btn-submit:hover { background: var(--accent-hover); box-shadow: var(--shadow-glow); }
.btn-submit:disabled { opacity: 0.55; cursor: not-allowed; }
.form-message {
  margin-top: 0.75rem; font-size: 0.88rem;
  border-radius: var(--radius-sm); padding: 0.6rem 0.9rem;
  display: none;
}
.form-message.success { background: rgba(76,175,80,0.12); color: var(--status-active); border: 1px solid rgba(76,175,80,0.3); display: block; }
.form-message.error   { background: rgba(244,67,54,0.12); color: #f44336;              border: 1px solid rgba(244,67,54,0.3); display: block; }
.review-moderation-note {
  font-size: 0.78rem; color: var(--text-tertiary);
  margin-top: 0.5rem; text-align: center;
}

/* ── Footer ──────────────────────────────────────────────── */
footer {
  background: var(--bg-sidebar);
  border-top: 1px solid var(--border-subtle);
  padding: 2.5rem 1.5rem;
}
.footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; flex-direction: column; align-items: center; gap: 1rem;
  text-align: center;
}
.footer-logo {
  display: flex; align-items: center; gap: 0.6rem;
  font-size: 1rem; font-weight: 700; color: var(--text-primary);
}
.footer-logo img { width: 28px; object-fit: contain; }
.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; justify-content: center; }
.footer-links a { font-size: 0.85rem; color: var(--text-tertiary); }
.footer-links a:hover { color: var(--text-secondary); }
.footer-legal {
  font-size: 0.78rem; color: var(--text-disabled); max-width: 600px; line-height: 1.6;
}
.footer-copy { font-size: 0.78rem; color: var(--text-disabled); }
.version-badge {
  background: var(--bg-surface-alt); border: 1px solid var(--border-subtle);
  border-radius: 999px; padding: 0.2rem 0.7rem;
  font-size: 0.75rem; color: var(--text-tertiary);
}

/* ── Animaciones de entrada (scroll) ─────────────────────── */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.55s ease, transform 0.55s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ── Scroll to top ───────────────────────────────────────── */
#scrollTop {
  position: fixed; bottom: 1.75rem; right: 1.75rem; z-index: 99;
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  color: var(--text-secondary); width: 42px; height: 42px;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; opacity: 0; pointer-events: none;
  transition: opacity var(--transition), box-shadow var(--transition);
  cursor: pointer;
}
#scrollTop.show { opacity: 1; pointer-events: auto; }
#scrollTop:hover { box-shadow: var(--shadow-glow); color: var(--accent); border-color: var(--border-hover); }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .reviews-layout { grid-template-columns: 1fr; }
  .review-form-wrapper { position: static; }
}

@media (max-width: 768px) {
  /* Nav móvil */
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: fixed; top: 64px; left: 0; right: 0; bottom: 0;
    background: rgba(10,17,26,0.97); backdrop-filter: blur(20px);
    padding: 2.5rem 1.5rem; gap: 2rem; z-index: 99;
    animation: slideDown 0.2s ease;
    align-items: center; justify-content: center;
  }
  .nav-links.open a { font-size: 1.3rem; }
  @keyframes slideDown { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: none; } }
  .nav-hamburger { display: block; }

  .hero-logo { width: 90px; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .download-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
  .hero-badges { gap: 0.4rem; }
  .btn-download { font-size: 0.95rem; padding: 0.8rem 1.6rem; }
}