/* ============ BASE — Variables & Reset ============ */
:root {
  /* Dark theme (default) */
  --bg-primary: #0f0f13;
  --bg-secondary: #1a1a24;
  --bg-card: #1e1e2e;
  --bg-hover: #2a2a3e;
  --bg-input: #252538;
  --border: #2e2e44;
  --text-primary: #e8e8f0;
  --text-secondary: #9898b0;
  --text-muted: #6868888;
  --accent: #7c5cfc;
  --accent-hover: #9b7eff;
  --accent-bg: rgba(124, 92, 252, 0.12);
  --green: #34d399;
  --green-bg: rgba(52, 211, 153, 0.12);
  --blue: #60a5fa;
  --blue-bg: rgba(96, 165, 250, 0.12);
  --yellow: #fbbf24;
  --yellow-bg: rgba(251, 191, 36, 0.12);
  --red: #f87171;
  --red-bg: rgba(248, 113, 113, 0.12);
  --orange: #fb923c;
  --orange-bg: rgba(251, 146, 60, 0.12);
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --sidebar-width: 260px;
  --topbar-height: 60px;
  --transition: 0.2s ease;
}

[data-theme="light"] {
  --bg-primary: #f5f5f9;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-hover: #f0f0f6;
  --bg-input: #f0f0f6;
  --border: #e2e2ee;
  --text-primary: #1a1a2e;
  --text-secondary: #5a5a7a;
  --text-muted: #8888a0;
  --accent: #6c4ce6;
  --accent-hover: #7c5cfc;
  --accent-bg: rgba(108, 76, 230, 0.08);
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font: inherit;
  color: inherit;
}

input, select, textarea {
  font: inherit;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 0.6rem 0.8rem;
  outline: none;
  transition: border var(--transition);
  width: 100%;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239898b0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.8rem center;
  padding-right: 2.2rem;
}

img {
  max-width: 100%;
  display: block;
}

.hidden { display: none !important; }
.text-muted { color: var(--text-muted); font-size: 0.85rem; }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-xs);
  font-weight: 500;
  font-size: 0.875rem;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg-hover); color: var(--text-primary); }

.btn-danger {
  background: var(--red-bg);
  color: var(--red);
  border: 1px solid rgba(248,113,113,0.2);
}
.btn-danger:hover { background: var(--red); color: white; }

.btn-full { width: 100%; justify-content: center; }

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  transition: all var(--transition);
  color: var(--text-secondary);
}
.btn-icon:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.btn-icon.active {
  background: var(--accent-bg);
  color: var(--accent);
}

/* ============ CARDS ============ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: all var(--transition);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

/* ============ BADGES ============ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-esencial { background: var(--green-bg); color: var(--green); }
.badge-útil { background: var(--blue-bg); color: var(--blue); }
.badge-referencia { background: var(--orange-bg); color: var(--orange); }
.badge-prompt { background: var(--accent-bg); color: var(--accent); }
.badge-tool { background: var(--blue-bg); color: var(--blue); }
.badge-repo { background: var(--green-bg); color: var(--green); }
.badge-guía { background: var(--yellow-bg); color: var(--yellow); }
.badge-template { background: var(--orange-bg); color: var(--orange); }

/* ============ TOGGLE SWITCH ============ */
.toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: var(--transition);
  cursor: pointer;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  left: 2px;
  bottom: 2px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: var(--transition);
}
.toggle input:checked + .toggle-slider {
  background: var(--accent);
  border-color: var(--accent);
}
.toggle input:checked + .toggle-slider::before {
  transform: translateX(20px);
  background: white;
}

/* ============ SCROLLBAR ============ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ============ SKELETON LOADING ============ */
.skeleton {
  background: linear-gradient(90deg, var(--bg-hover) 25%, var(--bg-card) 50%, var(--bg-hover) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-xs);
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============ ANIMATIONS ============ */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideIn {
  from { opacity: 0; transform: translateX(-12px); }
  to { opacity: 1; transform: translateX(0); }
}
.animate-in { animation: fadeIn 0.3s ease forwards; }