/**
 * Estilos Globales del Sistema: One Pen. Six Simple Marks
 * Sistema de diseño editorial, componentes modulares y variables CSS
 */

:root {
  /* Paleta Editorial Elegante (Tinta y Papel) */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-hover: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  
  --color-text-main: #0f172a;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;
  
  --color-primary: #1e293b;
  --color-primary-hover: #0f172a;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-subtle: #eff6ff;
  
  --color-success: #10b981;
  --color-success-bg: #ecfdf5;
  --color-warning: #f59e0b;
  --color-warning-bg: #fffbeb;
  --color-danger: #ef4444;
  --color-danger-bg: #fef2f2;

  /* Tipografía */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Newsreader', 'Georgia', serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Elevaciones */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Radios */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transición */
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Tipografía Base */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--color-text-main);
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

/* Barra de Navegación Superior */
.navbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
  text-decoration: none;
}

.navbar-brand span.pen-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  list-style: none;
}

.nav-link {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.nav-link:hover, .nav-link.active {
  color: var(--color-text-main);
  background-color: var(--color-surface-hover);
  text-decoration: none;
}

.user-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--color-surface-hover);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
}

.role-pill {
  font-size: 0.7rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
  background: var(--color-border);
  color: var(--color-text-muted);
}
.role-pill.admin {
  background: #fef3c7;
  color: #b45309;
}

/* Contenedor Principal */
.main-container {
  flex: 1;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1.25;
}
.btn:hover {
  text-decoration: none;
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn-accent {
  background: var(--color-accent);
  color: #ffffff;
}
.btn-accent:hover:not(:disabled) {
  background: var(--color-accent-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-main);
  border-color: var(--color-border-strong);
}
.btn-outline:hover:not(:disabled) {
  background: var(--color-surface-hover);
  border-color: var(--color-text-muted);
}

.btn-danger {
  background: var(--color-danger);
  color: #ffffff;
}
.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}
.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

/* Tarjetas */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-body {
  padding: 1.5rem;
}
.card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-hover);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* Formularios */
.form-group {
  margin-bottom: 1.25rem;
}
.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--color-text-main);
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.6rem 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-text-main);
  transition: var(--transition);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.form-hint {
  font-size: 0.775rem;
  color: var(--color-text-muted);
  margin-top: 0.35rem;
}

/* Tablas */
.table-responsive {
  overflow-x: auto;
}
.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}
.table th {
  background: var(--color-surface-hover);
  color: var(--color-text-muted);
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}
.table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
.table tbody tr:hover {
  background-color: #f8fafc;
}

/* Modales */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}
.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}
.modal-dialog {
  background: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  max-width: 520px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.modal-backdrop.active .modal-dialog {
  transform: translateY(0);
}

/* Toasts de Notificación */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: #ffffff;
  color: var(--color-text-main);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--color-primary);
  font-size: 0.875rem;
  animation: slideIn 0.3s ease;
  min-width: 280px;
  max-width: 420px;
}
.toast.success { border-left-color: var(--color-success); }
.toast.error { border-left-color: var(--color-danger); }
.toast.warning { border-left-color: var(--color-warning); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Grid de Libros / Láminas */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.sheet-thumb-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.sheet-thumb-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}
.sheet-thumb-img-wrapper {
  aspect-ratio: 1 / 1;
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  border-bottom: 1px solid var(--color-border);
}
.sheet-thumb-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  image-rendering: pixelated;
}

/* Iconos Vectoriales Monocromos Elegantes (Lucide) */
.lucide {
  width: 1.15em;
  height: 1.15em;
  stroke-width: 2px;
  vertical-align: -0.2em;
  display: inline-block;
  color: inherit;
}

.btn .lucide {
  width: 1.05em;
  height: 1.05em;
  vertical-align: -0.15em;
}

.btn .lucide:not(:only-child) {
  margin-right: 0.35rem;
}

.nav-link .lucide {
  width: 1.1em;
  height: 1.1em;
  margin-right: 0.4rem;
  vertical-align: -0.18em;
}

.user-badge .lucide {
  width: 1em;
  height: 1em;
  margin-right: 0.3rem;
  vertical-align: -0.15em;
}

.sidebar-title .lucide {
  width: 1.15em;
  height: 1.15em;
  margin-right: 0.4rem;
  vertical-align: -0.2em;
  color: #94a3b8;
}