/* ===================================================
   Altrium × 3Spark — Propuesta de Alianza Tecnológica
   Paleta: PropTech moderno — azul profundo, verde tech, gris sofisticado
   =================================================== */

:root {
  /* Paleta principal */
  --color-primary:   #1A3A5C;   /* Azul profundo — confianza, solidez */
  --color-accent:    #00C896;   /* Verde tech — crecimiento, innovación */
  --color-accent2:   #0EA5E9;   /* Azul cielo — tecnología, datos */
  --color-surface:   #F8FAFC;   /* Fondo general */
  --color-card:      #FFFFFF;
  --color-border:    #E2E8F0;
  --color-text:      #1E293B;
  --color-muted:     #64748B;
  --color-dark:      #0F172A;

  /* Tipografía */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Espaciado */
  --radius:    0.75rem;
  --radius-sm: 0.375rem;

  /* Sombras */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.10), 0 4px 6px rgba(0,0,0,0.05);
}

/* ---- RESET BASE ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background: var(--color-surface);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- LAYOUT ---- */
.app { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  width: 260px;
  min-width: 260px;
  background: var(--color-dark);
  display: flex;
  flex-direction: column;
  padding: 0;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  overflow-y: auto;
  z-index: 100;
}
.sidebar-logo {
  padding: 1.5rem 1.25rem 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-logo .brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
}
.sidebar-logo .subbrand {
  font-size: 0.72rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.15rem;
}
.sidebar-nav { padding: 0.75rem 0; flex: 1; }
.nav-section {
  padding: 0.5rem 1.25rem 0.25rem;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.3);
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1.25rem;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.65);
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all 0.15s ease;
  user-select: none;
}
.nav-item:hover { color: #fff; background: rgba(255,255,255,0.05); }
.nav-item.active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  background: rgba(0,200,150,0.08);
}
.nav-item .icon { font-size: 1rem; width: 1.2rem; text-align: center; }

/* Main content */
.main {
  margin-left: 260px;
  flex: 1;
  min-height: 100vh;
}
.content {
  max-width: 900px;
  margin: 0 auto;
  padding: 2.5rem 2rem;
}

/* ---- SECCIONES ---- */
.section { display: none; }
.section.active { display: block; }

/* ---- COMPONENTES ---- */
.page-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: -0.03em;
  margin-bottom: 0.4rem;
}
.page-subtitle {
  font-size: 0.95rem;
  color: var(--color-muted);
  margin-bottom: 2rem;
}
.divider { height: 1px; background: var(--color-border); margin: 2rem 0; }

/* Cards */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.25rem;
}
.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.card p { font-size: 0.9rem; color: var(--color-muted); line-height: 1.65; }
.card p + p { margin-top: 0.6rem; }

/* Badges */
.badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.badge-green  { background: #DCFCE7; color: #166534; }
.badge-blue   { background: #DBEAFE; color: #1E40AF; }
.badge-accent { background: rgba(0,200,150,0.12); color: #00845F; }
.badge-orange { background: #FEF3C7; color: #92400E; }

/* Tablas */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
th {
  text-align: left;
  padding: 0.65rem 0.9rem;
  background: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  font-weight: 600;
  color: var(--color-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
td {
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  vertical-align: top;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--color-surface); }

/* Stats / KPI */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem 1rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent2));
}
.stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: -0.03em;
  line-height: 1;
}
.stat-label { font-size: 0.78rem; color: var(--color-muted); margin-top: 0.3rem; }

/* Timeline */
.timeline { padding-left: 1.5rem; border-left: 2px solid var(--color-border); }
.timeline-item { position: relative; padding-bottom: 1.5rem; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.6rem;
  top: 0.3rem;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-card);
  box-shadow: 0 0 0 2px var(--color-accent);
}
.timeline-label { font-size: 0.75rem; color: var(--color-accent); font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }
.timeline-text { font-size: 0.9rem; color: var(--color-text); margin-top: 0.2rem; }

/* Code blocks */
.code-block {
  background: var(--color-dark);
  color: #E2E8F0;
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  overflow-x: auto;
  margin: 0.75rem 0;
}

/* CTA */
.cta-box {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0F2A45 100%);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  color: #fff;
  margin-top: 1.5rem;
}
.cta-box h3 { font-size: 1.3rem; font-weight: 800; margin-bottom: 0.5rem; }
.cta-box p { font-size: 0.9rem; opacity: 0.75; margin-bottom: 1.25rem; }
.cta-btn {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-dark);
  padding: 0.7rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  cursor: pointer;
  transition: opacity 0.15s;
}
.cta-btn:hover { opacity: 0.88; }

/* Highlight box */
.highlight {
  background: rgba(0,200,150,0.07);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 0.9rem 1.1rem;
  font-size: 0.9rem;
  color: var(--color-text);
  margin: 0.75rem 0;
}

/* Demo comparison */
.demo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1rem 0; }
.demo-col { border-radius: var(--radius); padding: 1.25rem; }
.demo-col.before { background: #FFF1F2; border: 1px solid #FECDD3; }
.demo-col.after  { background: #F0FDF4; border: 1px solid #BBF7D0; }
.demo-col-title { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 0.75rem; }
.demo-col.before .demo-col-title { color: #BE123C; }
.demo-col.after  .demo-col-title { color: #15803D; }
.demo-col ul { list-style: none; }
.demo-col li { font-size: 0.85rem; padding: 0.3rem 0; display: flex; gap: 0.5rem; align-items: flex-start; }
.demo-col.before li::before { content: '✗'; color: #E11D48; font-weight: 700; flex-shrink: 0; }
.demo-col.after  li::before { content: '✓'; color: #16A34A; font-weight: 700; flex-shrink: 0; }

/* Login */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary) 100%);
  padding: 1.5rem;
}
.login-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 2.5rem;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}
.login-logo { font-size: 1.3rem; font-weight: 800; color: var(--color-dark); margin-bottom: 0.25rem; }
.login-sub { font-size: 0.8rem; color: var(--color-muted); margin-bottom: 1.75rem; }
.login-card input {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
  outline: none;
  transition: border-color 0.15s;
  font-family: inherit;
}
.login-card input:focus { border-color: var(--color-accent); }
.login-btn {
  width: 100%;
  padding: 0.75rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s;
  font-family: inherit;
}
.login-btn:hover { opacity: 0.88; }
.login-error { color: #DC2626; font-size: 0.8rem; margin-top: 0.5rem; display: none; }

/* Pill list */
.pill-list { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.75rem 0; }
.pill {
  padding: 0.3rem 0.8rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--color-text);
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar { width: 100%; min-width: 0; position: static; height: auto; flex-direction: row; }
  .main { margin-left: 0; }
  .demo-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}