:root {
  --bg-main: #050814;
  --bg-dark-blue: #0B1220;
  --bg-card: #111827;
  --border-dark: #1F2937;
  --purple-neon: #8E2BFF;
  --cyan-neon: #00C8FF;
  --text-white: #F5F7FA;
  --text-light: #C7CEDB;
  --text-muted: #6B7280;
  --success: #22C55E;
  --danger: #FF1744;
  --warning: #FACC15;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg-main);
  color: var(--text-white);
  font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

img, video { max-width: 100%; display: block; }
table { border-collapse: collapse; width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }

/* Header (ui.js) — Tailwind CDN no compila clases inyectadas por JS */
.gk-nav-desktop,
.gk-nav-auth { display: none; }
.gk-nav-mobile-btn { display: block; margin-left: auto; }

@media (min-width: 768px) {
  .gk-nav-desktop {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex: 1;
    justify-content: center;
  }
  .gk-nav-auth {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
  }
  .gk-nav-mobile-btn { display: none; }
  #site-header #mobile-menu { display: none !important; }
}

@media (min-width: 1024px) {
  .gk-nav-desktop { gap: 1.5rem; }
  .gk-nav-user-info { display: block; }
}

.gk-nav-user-info { display: none; }

#site-header .gk-dropdown { position: relative; }
#site-header .gk-dropdown-panel {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.25rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  z-index: 60;
}
#site-header .gk-dropdown-panel--right { left: auto; right: 0; }
#site-header .gk-dropdown:hover .gk-dropdown-panel,
#site-header .gk-dropdown:focus-within .gk-dropdown-panel {
  opacity: 1;
  visibility: visible;
}

/* Perfil */
.profile-input::placeholder { color: var(--text-muted); }
.profile-avatar-upload input:focus + img,
.profile-preset-avatar:focus { outline: 2px solid var(--purple-neon); outline-offset: 2px; }

.profile-account-nav { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.profile-account-tab { white-space: nowrap; }

/* Admin sidebar */
#admin-sidebar {
  transition: width 0.25s ease, transform 0.25s ease;
  overflow-x: hidden;
  white-space: nowrap;
}
#admin-sidebar .admin-nav-label { transition: opacity 0.2s ease; }
#admin-sidebar.admin-collapsed .admin-nav-label { opacity: 0; width: 0; display: none; }
#admin-sidebar.admin-collapsed .admin-nav-item { justify-content: center; padding-left: 0; padding-right: 0; }
#admin-sidebar.admin-collapsed .admin-nav-item svg { margin-right: 0 !important; }
#admin-sidebar.admin-collapsed .admin-logo-text { display: none; }
#admin-sidebar.admin-collapsed .admin-logo-short { display: flex; }
#admin-sidebar.admin-collapsed .admin-bottom-text { display: none; }
.admin-logo-short { display: none; }
#admin-sidebar.admin-collapsed .admin-credit { display: none; }
#admin-sidebar:not(.admin-collapsed) .admin-toggle-icon-open { display: none; }
#admin-sidebar.admin-collapsed .admin-toggle-icon-close { display: none; }
#admin-sidebar .admin-nav-item { color: var(--text-muted); }
#admin-sidebar .admin-nav-item:hover { background-color: var(--bg-card); color: var(--text-light); }
#admin-sidebar .admin-nav-item.active { background: rgba(142,43,255,0.15); color: var(--purple-neon); border: 1px solid rgba(142,43,255,0.3); }

button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
select { color-scheme: dark; }
option { background: var(--bg-card); color: var(--text-white); }

@media (min-width: 768px) {
  #admin-sidebar { transform: translateX(0) !important; }
  #admin-sidebar.admin-collapsed { width: 4rem !important; }
  #admin-sidebar:not(.admin-collapsed) { width: 15rem !important; }
  .admin-main-expanded { margin-left: 15rem; }
  .admin-main-collapsed { margin-left: 4rem; }
}
@media (max-width: 767px) {
  #admin-sidebar { transform: translateX(-100%); width: 15rem !important; }
  #admin-sidebar.admin-open { transform: translateX(0); }
  #admin-sidebar.admin-collapsed { width: 15rem !important; }
  #admin-sidebar.admin-collapsed .admin-nav-label { opacity: 1; width: auto; display: inline; }
  #admin-sidebar.admin-collapsed .admin-nav-item { justify-content: flex-start; padding-left: 0.75rem; padding-right: 0.75rem; }
  #admin-sidebar.admin-collapsed .admin-logo-text { display: inline; }
  #admin-sidebar.admin-collapsed .admin-logo-short { display: none; }
  #admin-sidebar.admin-collapsed .admin-bottom-text { display: block; }
  #admin-sidebar.admin-collapsed .admin-credit { display: block; }
}

button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
select { color-scheme: dark; }
option { background: var(--bg-card); color: var(--text-white); }

.bg-brand-gradient {
  background: linear-gradient(90deg, #8E2BFF 0%, #A020F0 35%, #007BFF 70%, #00C8FF 100%);
}

.text-brand-gradient {
  background: linear-gradient(90deg, #8E2BFF 0%, #A020F0 35%, #007BFF 70%, #00C8FF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in-up { animation: fadeInUp 0.6s ease-out forwards; }

.scrollbar-hide { -ms-overflow-style: none; scrollbar-width: none; }
.scrollbar-hide::-webkit-scrollbar { display: none; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-dark-blue); }
::-webkit-scrollbar-thumb { background: var(--border-dark); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--purple-neon); }

.admin-table-wrap {
  overflow-x: auto;
  border-radius: 0.75rem;
  border: 1px solid var(--border-dark);
  background: var(--bg-card);
}

.admin-table { width: 100%; min-width: 640px; font-size: 0.875rem; }
.admin-thumb { width: 2.25rem; height: 3rem; border-radius: 0.25rem; object-fit: cover; flex-shrink: 0; }
.admin-avatar { width: 2rem; height: 2rem; border-radius: 9999px; object-fit: cover; flex-shrink: 0; }

.modal-backdrop { background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); }
.hidden { display: none !important; }

/* Admin table action buttons */
.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.5rem;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  background: transparent;
  cursor: pointer;
}
.action-btn:hover { transform: scale(1.1); }
.edit-btn { color: var(--purple-neon); border-color: rgba(142,43,255,0.25); }
.edit-btn:hover { background: rgba(142,43,255,0.1); }
.notify-btn { color: #22D3EE; border-color: rgba(34,211,238,0.25); }
.notify-btn:hover { background: rgba(34,211,238,0.1); }
.delete-btn { color: #FF1744; border-color: rgba(255,23,68,0.25); }
.delete-btn:hover { background: rgba(255,23,68,0.1); }

/* ===== BOTÓN DE DESCARGA ===== */
.download-btn:hover {
  box-shadow: 0 0 20px rgba(34,211,238,0.2);
}
@keyframes downloadPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34,211,238,0.3); }
  50% { box-shadow: 0 0 12px 4px rgba(34,211,238,0.1); }
}
.download-btn:not(:active) {
  animation: downloadPulse 2s ease-in-out infinite;
}

/* ===== ESTILOS MODAL DESCARGA ===== */
.dl-chapter-item {
  transition: all 0.2s ease;
}
.dl-chapter-item:hover {
  background: rgba(255,255,255,0.08);
}
#dl-chapter-list::-webkit-scrollbar {
  width: 4px;
}
#dl-chapter-list::-webkit-scrollbar-thumb {
  background: var(--purple-neon);
  border-radius: 2px;
}

/* ===== MARCA DE AGUA EN LECTOR ===== */
.watermark-overlay {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 99999;
  pointer-events: none;
  user-select: none;
  -webkit-user-select: none;
  font-family: 'Orbitron', sans-serif;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 1.5px;
  color: rgba(255, 255, 255, 0.2);
  text-shadow: 0 0 12px rgba(142, 43, 255, 0.4), 0 0 30px rgba(34, 211, 238, 0.15);
  transform: rotate(-3deg);
  white-space: nowrap;
}
@media (max-width: 640px) {
  .watermark-overlay {
    font-size: 11px;
    bottom: 12px;
    right: 12px;
    color: rgba(255, 255, 255, 0.15);
  }
}

/* Premium stepper preset buttons */
.preset-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem 0.625rem;
  border-radius: 0.5rem;
  font-size: 0.6875rem;
  font-weight: 500;
  border: 1px solid rgba(142,43,255,0.25);
  color: #c084fc;
  background: transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}
.preset-btn:hover {
  background: rgba(142,43,255,0.12);
  border-color: #8E2BFF;
  transform: translateY(-1px);
}
.preset-btn:active {
  transform: scale(0.95);
}
.preset-btn-remove {
  color: #fb7185;
  border-color: rgba(255,23,68,0.25);
}
.preset-btn-remove:hover {
  background: rgba(255,23,68,0.1);
  border-color: #FF1744;
}
details > summary { list-style: none; }
details > summary::-webkit-details-marker { display: none; }