/* ═══════════════════════════════════════════════════════════════
   SagaTechSchool Pro — Design System
   Variables, tokens y componentes globales
═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Poppins:wght@400;600;700;800&display=swap');

/* ─── Custom Properties ──────────────────────────────────────── */
:root {
  /* Paleta principal */
  --color-primario:     hsl(225, 85%, 58%);
  --color-primario-h:   hsl(225, 85%, 50%);
  --color-primario-rgb: 66, 99, 235;

  --color-secundario:   hsl(265, 75%, 62%);
  --color-acento:       hsl(165, 82%, 45%);
  --color-peligro:      hsl(0,   72%, 55%);
  --color-advertencia:  hsl(38,  95%, 54%);
  --color-exito:        hsl(142,  72%, 45%);

  /* Gradientes */
  --grad-primary:   linear-gradient(135deg, var(--color-primario), var(--color-secundario));
  --grad-acento:    linear-gradient(135deg, var(--color-acento), var(--color-primario));
  --grad-dark:      linear-gradient(135deg, hsl(220,25%,12%), hsl(260,25%,15%));

  /* Fondos (Light Mode) */
  --bg-base:       #f8fafc;
  --bg-superficie: #ffffff;
  --bg-elevado:    #f1f5f9;
  --bg-card:       #ffffff;
  --bg-hover:      #e2e8f0;

  /* Textos */
  --texto-1:       #0f172a;
  --texto-2:       #334155;
  --texto-3:       #64748b;

  /* Bordes */
  --borde:         #cbd5e1;
  --borde-focus:   var(--color-primario);

  /* Glassmorphism */
  --glass-bg:      rgba(255,255,255,0.6);
  --glass-border:  rgba(255,255,255,0.8);
  --glass-blur:    blur(20px) saturate(180%);

  /* Sombras */
  --sombra-sm:     0 2px 8px rgba(0,0,0,0.3);
  --sombra-md:     0 4px 20px rgba(0,0,0,0.4);
  --sombra-lg:     0 8px 40px rgba(0,0,0,0.5);
  --sombra-primary: 0 4px 20px rgba(var(--color-primario-rgb), 0.3);

  /* Radios */
  --radio-sm:  6px;
  --radio-md: 12px;
  --radio-lg: 20px;
  --radio-xl: 28px;

  /* Transiciones */
  --trans-fast:   0.15s ease;
  --trans-normal: 0.25s ease;
  --trans-slow:   0.4s ease;

  /* Tipografía */
  --font-sans:    'Inter', system-ui, sans-serif;
  --font-display: 'Poppins', sans-serif;

  /* Sidebar width */
  --sidebar-w: 260px;
}

/* ─── Reset & Base ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--texto-1);
  line-height: 1.6;
  min-height: 100vh;
}

img, video { max-width: 100%; display: block; }
a { color: var(--color-primario); text-decoration: none; transition: color var(--trans-fast); }
a:hover { color: var(--color-secundario); }
ul, ol { list-style: none; }

/* ─── Tipografía ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.25;
  font-weight: 700;
  color: var(--texto-1);
}
h1 { font-size: clamp(1.8rem, 4vw, 3rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.2rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }
p  { color: var(--texto-2); }

/* ─── Botones ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radio-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--trans-normal);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: var(--sombra-primary);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(var(--color-primario-rgb), 0.5);
  color: #fff;
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--texto-1);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
}
.btn-secondary:hover { background: var(--bg-hover); color: var(--texto-1); }

.btn-danger  { background: var(--color-peligro);    color: #fff; }
.btn-success { background: var(--color-exito);      color: #fff; }
.btn-warning { background: var(--color-advertencia);color: #1a1a1a; }

.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 30px; font-size: 1rem; }
.btn-block { width: 100%; justify-content: center; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ─── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--borde);
  border-radius: var(--radio-lg);
  padding: 24px;
  transition: all var(--trans-normal);
}

.card-glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  border-radius: var(--radio-lg);
  padding: 24px;
}

.card-hover:hover {
  border-color: rgba(var(--color-primario-rgb), 0.4);
  box-shadow: var(--sombra-md);
  transform: translateY(-3px);
}

/* ─── Formularios ────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--texto-2);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.form-control {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg-elevado);
  border: 1.5px solid var(--borde);
  border-radius: var(--radio-md);
  color: var(--texto-1);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: all var(--trans-fast);
  outline: none;
}
.form-control:focus {
  border-color: var(--color-primario);
  box-shadow: 0 0 0 3px rgba(var(--color-primario-rgb), 0.15);
}
.form-control::placeholder { color: var(--texto-3); }

select.form-control { cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 100px; }

/* ─── Alertas / Mensajes ─────────────────────────────────────── */
.alerta {
  padding: 12px 16px;
  border-radius: var(--radio-md);
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.alerta-error   { background: rgba(220,38,38,0.15);  border: 1px solid rgba(220,38,38,0.3);  color: #fca5a5; }
.alerta-ok      { background: rgba(34,197,94,0.15);  border: 1px solid rgba(34,197,94,0.3);  color: #86efac; }
.alerta-warn    { background: rgba(234,179,8,0.15);  border: 1px solid rgba(234,179,8,0.3);  color: #fde047; }
.alerta-info    { background: rgba(99,102,241,0.15); border: 1px solid rgba(99,102,241,0.3); color: #a5b4fc; }

/* ─── Badges / Pills ─────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}
.badge-primary   { background: rgba(var(--color-primario-rgb),0.2); color: var(--color-primario); }
.badge-success   { background: rgba(34,197,94,0.2);  color: #4ade80; }
.badge-danger    { background: rgba(220,38,38,0.2);  color: #f87171; }
.badge-warning   { background: rgba(234,179,8,0.2);  color: #facc15; }
.badge-secondary { background: var(--bg-elevado);    color: var(--texto-2); }

/* ─── Tablas ─────────────────────────────────────────────────── */
.tabla-wrapper { overflow-x: auto; border-radius: var(--radio-lg); }
.tabla {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.tabla th {
  background: var(--bg-elevado);
  color: var(--texto-3);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 12px 16px;
  text-align: left;
}
.tabla td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--borde);
  color: var(--texto-2);
}
.tabla tbody tr:hover { background: var(--bg-hover); }
.tabla tbody tr:last-child td { border-bottom: none; }

/* ─── Progress bar ───────────────────────────────────────────── */
.progress {
  height: 8px;
  background: var(--bg-elevado);
  border-radius: 999px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: var(--grad-primary);
  border-radius: 999px;
  transition: width 0.6s ease;
}

/* ─── Avatar ─────────────────────────────────────────────────── */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--grad-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
  flex-shrink: 0;
}

/* ─── Spinner ────────────────────────────────────────────────── */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Utilidades ─────────────────────────────────────────────── */
.flex         { display: flex; }
.flex-col     { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2  { gap: 8px; }
.gap-4  { gap: 16px; }
.gap-6  { gap: 24px; }
.mt-4   { margin-top: 16px; }
.mt-6   { margin-top: 24px; }
.mb-4   { margin-bottom: 16px; }
.text-sm   { font-size: 0.875rem; }
.text-xs   { font-size: 0.75rem; }
.text-muted { color: var(--texto-3); }
.font-bold  { font-weight: 700; }
.truncate   { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* ─── Responsive grid ────────────────────────────────────────── */
@media (max-width: 1024px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px)  { 
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}

/* ─── Scrollbar personalizado ────────────────────────────────── */
::-webkit-scrollbar       { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--borde); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--texto-3); }

/* ─── Animaciones ────────────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideIn {
  from { transform: translateX(-20px); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}
@keyframes pulso {
  0%, 100% { box-shadow: 0 0 0 0 rgba(var(--color-primario-rgb), 0.4); }
  50%       { box-shadow: 0 0 0 10px rgba(var(--color-primario-rgb), 0); }
}

.animate-fade    { animation: fadeIn 0.4s ease both; }
.animate-slide   { animation: slideIn 0.3s ease both; }
.animate-pulso   { animation: pulso 2s infinite; }