/* ============================================================
   LEEBOOK DESIGN SYSTEM
   Tokens, componentes base y utilidades compartidas
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&display=swap');

/* ── TOKENS ─────────────────────────────────────────────── */
:root {
  /* Colores */
  --color-accent:        #ff8c5a;
  --color-accent-dark:   #e87a48;
  --color-accent-light:  #fff5f0;
  --color-accent-border: #ffd4b8;

  --color-ink:           #2B2B2B;
  --color-ink-secondary: #74808a;
  --color-ink-muted:     #b2bec3;

  --color-surface:       #ffffff;
  --color-bg:            #f4f6f9;
  --color-border:        #f0f0f0;
  --color-border-mid:    #e0e0e0;

  --color-success:       #2ecc71;
  --color-success-bg:    #f0faf4;
  --color-error:         #e74c3c;
  --color-error-bg:      #fdecea;
  --color-error-border:  #f5c6cb;

  /* Tipografía */
  --font-base: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --text-xs:   0.72rem;   /* etiquetas, badges */
  --text-sm:   0.82rem;   /* meta, hints */
  --text-base: 0.875rem;  /* cuerpo */
  --text-md:   0.95rem;   /* destacados */
  --text-lg:   1.1rem;    /* títulos de sección */
  --text-xl:   1.25rem;   /* títulos de página */
  --text-2xl:  1.5rem;    /* headings grandes */

  --weight-normal:  400;
  --weight-medium:  500;
  --weight-semibold:600;
  --weight-bold:    700;
  --weight-black:   800;

  /* Espaciados */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-7:  28px;
  --space-8:  32px;
  --space-10: 40px;

  /* Radios */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  12px;
  --radius-xl:  14px;
  --radius-2xl: 20px;
  --radius-full: 9999px;

  /* Sombras */
  --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:   0 8px 32px rgba(0,0,0,0.14);

  /* Layout */
  --page-max:    1400px;
  --sidebar-w:   280px;
  --right-col-w: 280px;
  --content-w:   730px;

  /* Transiciones */
  --transition: 0.15s ease;
}

/* ── RESET MÍNIMO ────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html {
  overflow-x: hidden;
}

body {
  background: var(--color-bg);
  margin: 0;
  font-family: var(--font-base);
  font-size: var(--text-base);
  color: var(--color-ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── LAYOUT ──────────────────────────────────────────────── */
.lb-page {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: var(--space-5) var(--space-6) var(--space-10);
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--right-col-w);
  gap: var(--space-6);
  align-items: start;
  justify-content: center;
}

.lb-page--no-right {
  grid-template-columns: var(--sidebar-w) 1fr;
}

.lb-page--centered {
  grid-template-columns: 1fr;
  max-width: 760px;
}

/* ── NAVBAR ──────────────────────────────────────────────── */
.lb-topbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  position: sticky;
  top: 0;
  z-index: 100;
}

.lb-navbar {
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.lb-navbar__brand img { height: 40px; display: block; }

.lb-navbar__actions { display: flex; align-items: center; gap: var(--space-2); }

.lb-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.4rem;
  color: var(--color-ink);
  padding: var(--space-1);
  line-height: 1;
}

/* ── BOTONES ─────────────────────────────────────────────── */
.lb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 9px var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  font-family: var(--font-base);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  white-space: nowrap;
  line-height: 1;
}

.lb-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Variantes */
.lb-btn--primary {
  background: var(--color-accent);
  color: white;
  border: 1.5px solid var(--color-accent);
}
.lb-btn--primary:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); color: white; }

.lb-btn--ghost {
  background: #f8f9fa;
  color: var(--color-ink);
  border: 1.5px solid var(--color-border);
}
.lb-btn--ghost:hover { background: var(--color-border); color: var(--color-ink); }

.lb-btn--outline {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}
.lb-btn--outline:hover { background: var(--color-accent-light); }

.lb-btn--danger {
  background: transparent;
  color: var(--color-error);
  border: 1.5px solid var(--color-error-border);
}
.lb-btn--danger:hover { background: var(--color-error-bg); }

/* Tamaños */
.lb-btn--sm { padding: 6px var(--space-3); font-size: var(--text-sm); }
.lb-btn--lg { padding: 12px var(--space-6); font-size: var(--text-md); }
.lb-btn--full { width: 100%; }

/* ── INPUTS ──────────────────────────────────────────────── */
.lb-input,
.lb-textarea,
.lb-select {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--color-border-mid);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-family: var(--font-base);
  color: var(--color-ink);
  background: var(--color-surface);
  outline: none;
  transition: border-color var(--transition);
  -webkit-appearance: none;
}
.lb-input:focus,
.lb-textarea:focus,
.lb-select:focus { border-color: var(--color-accent); }

.lb-textarea { resize: vertical; min-height: 90px; }

.lb-input-group {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--color-border-mid);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
  transition: border-color var(--transition);
}
.lb-input-group:focus-within { border-color: var(--color-accent); }

.lb-input-group__prefix {
  padding: 10px 12px;
  background: #f8f9fa;
  color: var(--color-ink-secondary);
  font-size: var(--text-base);
  border-right: 1.5px solid var(--color-border-mid);
  white-space: nowrap;
  line-height: 1;
  display: flex;
  align-items: center;
}

.lb-input-group input {
  border: none;
  outline: none;
  padding: 10px 14px;
  font-size: var(--text-base);
  font-family: var(--font-base);
  flex: 1;
  background: transparent;
  color: var(--color-ink);
}

.lb-form-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  color: var(--color-ink-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-2);
}

.lb-form-hint {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  margin-top: var(--space-1);
}

.lb-form-group { margin-bottom: var(--space-5); }

/* ── CARDS ───────────────────────────────────────────────── */
.lb-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.lb-card__body { padding: var(--space-5) var(--space-6); }
.lb-card__body--sm { padding: var(--space-4) var(--space-5); }

.lb-card__title {
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  color: var(--color-ink);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-4);
}
.lb-card__title i { color: var(--color-accent); }

/* ── SIDEBAR ─────────────────────────────────────────────── */
.lb-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.lb-sidebar-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.lb-sidebar-title {
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--color-ink-muted);
  padding: 14px var(--space-5) var(--space-1);
}

.lb-sidebar-item {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 11px var(--space-5);
  color: #555;
  text-decoration: none;
  font-size: var(--text-base);
  transition: background var(--transition);
  border-left: 3px solid transparent;
}
.lb-sidebar-item:hover { background: #f8f9fa; color: var(--color-accent); }
.lb-sidebar-item.active { background: var(--color-accent-light); color: var(--color-accent); border-left-color: var(--color-accent); font-weight: var(--weight-semibold); }
.lb-sidebar-item i { font-size: 1rem; }
.lb-sidebar-divider { height: 1px; background: var(--color-border); margin: var(--space-1) 0; }
.badge-unseen-dot { background: #ff8c5a; color: white; font-size: 0.6rem; font-weight: 800; padding: 1px 6px; border-radius: 20px; margin-left: auto; }

/* ── BADGES ──────────────────────────────────────────────── */
.lb-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  letter-spacing: 0.3px;
}
.lb-badge--accent { background: var(--color-accent); color: white; }
.lb-badge--light  { background: var(--color-accent-light); color: var(--color-accent); }
.lb-badge--muted  { background: #f0f0f0; color: var(--color-ink-secondary); }
.lb-badge--success{ background: var(--color-success-bg); color: var(--color-success); }
.lb-badge--soon   { background: var(--color-accent); color: white; font-size: 0.65rem; padding: 2px 6px; vertical-align: middle; border-radius: var(--radius-sm); }

/* ── DRAWER MÓVIL ────────────────────────────────────────── */
.hamburger-btn { display: none; background: none; border: none; font-size: 1.5rem; color: #2B2B2B; cursor: pointer; padding: 4px 8px; }
.mobile-drawer-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.35); z-index: 999; }
.mobile-drawer-overlay.open { display: block; }
.mobile-drawer { position: fixed; top: 0; left: -320px; width: 300px; height: 100vh; background: white; z-index: 1000; overflow-y: auto; transition: left 0.28s cubic-bezier(.4,0,.2,1); box-shadow: 4px 0 24px rgba(0,0,0,0.12); }
.mobile-drawer.open { left: 0; }
.mobile-drawer-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid #f0f0f0; }
.sidebar-nav-item { display: flex; align-items: center; gap: 12px; padding: 12px 20px; color: #2B2B2B; text-decoration: none; font-size: 0.9rem; font-weight: 500; transition: background 0.15s; }
.sidebar-nav-item:hover, .sidebar-nav-item.active { background: #fff5f0; color: #ff8c5a; }
.sidebar-nav-item i { font-size: 1.1rem; color: #74808a; width: 20px; }
.sidebar-nav-item:hover i, .sidebar-nav-item.active i { color: #ff8c5a; }
.sidebar-section-title { font-size: 0.68rem; font-weight: 700; color: #b2bec3; text-transform: uppercase; letter-spacing: 0.8px; padding: 8px 20px 4px; }
.sidebar-divider { height: 1px; background: #f0f0f0; margin: 6px 0; }
@media (max-width: 768px) {
  .hamburger-btn { display: block; }
  .navbar-brand { position: absolute; left: 50%; transform: translateX(-50%); }
}

/* ── ALERTAS ─────────────────────────────────────────────── */
.lb-alert {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  margin-bottom: var(--space-4);
}
.lb-alert--success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.lb-alert--error   { background: var(--color-error-bg); color: #c0392b; border: 1px solid var(--color-error-border); }
.lb-alert--info    { background: #e8f4fd; color: #1a6fa0; border: 1px solid #b8d9f3; }

/* ── DRAWER MÓVIL ────────────────────────────────────────── */
.lb-drawer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 1000;
}
.lb-drawer-overlay.open { display: block; }

.lb-drawer {
  position: fixed;
  top: 0; left: -280px;
  width: 260px; height: 100%;
  background: var(--color-surface);
  z-index: 1001;
  transition: left 0.25s ease;
  overflow-y: auto;
  box-shadow: 4px 0 20px rgba(0,0,0,0.15);
}
.lb-drawer.open { left: 0; }

.lb-drawer__header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.lb-drawer__profile {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  text-decoration: none;
  background: var(--color-accent-light);
  border-bottom: 1px solid var(--color-accent-border);
}

.lb-drawer__avatar {
  width: 52px; height: 52px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  border: 2px solid var(--color-accent-border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; color: white; font-weight: var(--weight-bold);
  flex-shrink: 0; overflow: hidden;
}
.lb-drawer__avatar img { width: 100%; height: 100%; object-fit: cover; }

.lb-drawer__name { font-size: var(--text-md); font-weight: var(--weight-bold); color: var(--color-ink); }
.lb-drawer__link { font-size: var(--text-base); color: var(--color-accent); }

/* ── TOGGLE ──────────────────────────────────────────────── */
.lb-toggle { position: relative; width: 44px; height: 24px; flex-shrink: 0; }
.lb-toggle input { opacity: 0; width: 0; height: 0; }
.lb-toggle__slider {
  position: absolute; inset: 0;
  background: #dfe6e9;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background 0.2s;
}
.lb-toggle__slider::before {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: white;
  top: 3px; left: 3px;
  transition: transform 0.2s;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.lb-toggle input:checked + .lb-toggle__slider { background: var(--color-accent); }
.lb-toggle input:checked + .lb-toggle__slider::before { transform: translateX(20px); }

/* ── DIVIDER ─────────────────────────────────────────────── */
.lb-divider { height: 1px; background: var(--color-border); margin: var(--space-4) 0; }

/* ── AVATAR ──────────────────────────────────────────────── */
.lb-avatar {
  border-radius: var(--radius-full);
  background: var(--color-accent);
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: var(--weight-bold);
  overflow: hidden; flex-shrink: 0;
}
.lb-avatar img { width: 100%; height: 100%; object-fit: cover; }
.lb-avatar--sm  { width: 32px; height: 32px; font-size: 0.8rem; }
.lb-avatar--md  { width: 44px; height: 44px; font-size: 1rem; }
.lb-avatar--lg  { width: 64px; height: 64px; font-size: 1.4rem; }
.lb-avatar--xl  { width: 80px; height: 80px; font-size: 1.8rem; }

/* ── PROGRESS BAR ────────────────────────────────────────── */
.lb-progress {
  background: var(--color-border);
  border-radius: var(--radius-full);
  height: 8px;
  overflow: hidden;
}
.lb-progress__fill {
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-dark));
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.5s ease;
}

/* ── SKELETON ────────────────────────────────────────────── */
@keyframes lb-skeleton { 0%,100% { opacity: 1; } 50% { opacity: .4; } }
.lb-skeleton {
  background: var(--color-border);
  border-radius: var(--radius-sm);
  animation: lb-skeleton 1.4s ease infinite;
}

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 1100px) {
  .lb-page { grid-template-columns: var(--sidebar-w) 1fr; }
  .lb-right-col { display: none; }
}

@media (max-width: 768px) {
  .lb-page {
    grid-template-columns: 1fr;
    padding: var(--space-3) var(--space-3) 100px;
    gap: var(--space-3);
  }
  .lb-sidebar { display: none; }
  .lb-hamburger { display: flex; align-items: center; }
  .lb-navbar__actions .lb-btn--primary { display: none; }
  .lb-navbar {
    padding: 10px var(--space-4);
    position: relative;
  }
  .lb-navbar__brand {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
}

/* ── BOTTOM NAV (móvil) ──────────────────────────────────── */
.lb-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.98);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
  z-index: 200;
  padding-bottom: max(env(safe-area-inset-bottom), 8px);
  backdrop-filter: blur(10px);
}

.lb-bottom-nav__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px var(--space-1) 6px;
  color: var(--color-ink-secondary);
  text-decoration: none;
  font-size: 0.62rem;
  gap: 2px;
  transition: color var(--transition);
}
.lb-bottom-nav__item i { font-size: 1.35rem; }
.lb-bottom-nav__item.active,
.lb-bottom-nav__item:hover { color: var(--color-accent); }

@media (max-width: 768px) {
  .lb-bottom-nav { display: flex; }
}

/* ── UTILIDADES ──────────────────────────────────────────── */
.lb-text-accent   { color: var(--color-accent); }
.lb-text-muted    { color: var(--color-ink-secondary); }
.lb-text-faint    { color: var(--color-ink-muted); }
.lb-text-ink      { color: var(--color-ink); }
.lb-font-bold     { font-weight: var(--weight-bold); }
.lb-font-black    { font-weight: var(--weight-black); }
.lb-truncate      { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ── ALIASES LEGACY (clases antiguas → design system) ────── */
/* Navbar */
.top-block { background: var(--color-surface); border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-card); }
.navbar-leebook { padding: 12px var(--space-6); display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); position: relative; }
.navbar-brand img { height: 40px; display: block; }
.navbar-actions { display: flex; align-items: center; gap: var(--space-2); }

/* Botón home solo en móvil (derecha de la navbar) */
.navbar-home-mobile { display: none; }
@media (max-width: 768px) {
  .navbar-home-mobile { display: inline-flex; align-items: center; justify-content: center; padding: 7px 10px; border-radius: 8px; background: #f8f9fa; border: 1px solid var(--color-border); color: var(--color-ink); text-decoration: none; font-size: 1.1rem; flex-shrink: 0; margin-left: auto; }
  .navbar-home-mobile:hover { background: var(--color-accent-light); color: var(--color-accent); }
}

/* Botones navbar */
.nav-btn { display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px; border-radius: var(--radius-md); font-size: var(--text-base); font-weight: var(--weight-medium); font-family: var(--font-base); text-decoration: none; transition: background var(--transition), color var(--transition); cursor: pointer; border: none; }
.nav-btn-ghost { color: var(--color-ink); background: #f8f9fa; border: 1px solid var(--color-border); }
.nav-btn-ghost:hover { background: #f0f0f0; color: var(--color-ink); }
.nav-btn-solid { background: var(--color-accent); color: white; font-weight: var(--weight-medium); border: 1px solid var(--color-accent); }
.nav-btn-solid:hover { background: var(--color-accent-dark); color: white; }
.nav-btn i { font-size: 0.95rem; }

/* Layout de página — siempre 3 columnas fijas */
.page-layout {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 18px var(--space-6) 40px;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--right-col-w);
  gap: var(--space-6);
  align-items: start;
  box-sizing: border-box;
}
.page-layout > * { min-width: 0; overflow: hidden; }

@media (max-width: 1100px) {
  .page-layout { grid-template-columns: var(--sidebar-w) 1fr; }
  .page-layout > *:nth-child(3) { display: none; }
}
@media (max-width: 768px) {
  .page-layout { grid-template-columns: minmax(0, 1fr); padding: 12px 12px 100px; gap: 12px; }
  .navbar-leebook { padding: 10px var(--space-4); }
  .hamburger-btn { display: flex !important; }
}

/* ── ALIASES SIDEBAR (clases locales → design system) ────── */
/* Sidebar card — alias para templates que usen clase local en lugar de .lb-sidebar-card */
.sidebar-card { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); overflow: hidden; }
.sidebar-section-title { font-size: var(--text-xs); font-weight: var(--weight-bold); text-transform: uppercase; letter-spacing: 1.2px; color: var(--color-ink-secondary); padding: 16px 20px 6px; }
.sidebar-divider { height: 1px; background: var(--color-border); margin: 6px 0; }
.sidebar-nav-item { display: flex; align-items: center; gap: 13px; padding: 13px 20px; color: var(--color-ink); text-decoration: none; font-size: 1rem; font-weight: 500; transition: background var(--transition); border-left: 3px solid transparent; }
.sidebar-nav-item:hover { background: #f8f9fa; color: var(--color-accent); }
.sidebar-nav-item.active { background: #fff5f0; color: var(--color-accent); border-left-color: var(--color-accent); font-weight: 600; }
.sidebar-nav-item i { font-size: 1.15rem; color: var(--color-ink-secondary); }
.sidebar-nav-item:hover i, .sidebar-nav-item.active i { color: var(--color-accent); }
.page-layout > * { min-width: 0; overflow: hidden; }