:root {
  --color-primary: #1b396a;
  --color-primary-dark: #102343;
  --color-accent: #D96313;
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-surface-alt: #e9e6ef;
  --color-text: #2b2b2b;
  --color-text-muted: #555555;
  --color-border: #dcdcdc;

  /* Semáforo */
  --status-green: #2e7d32;
  --status-green-bg: #e8f5e9;
  --status-yellow: #ed6c02;
  --status-yellow-bg: #fff4e5;
  --status-red: #d32f2f;
  --status-red-bg: #ffebee;
  --status-gray: #757575;
  --status-gray-bg: #f5f5f5;

  --font-base: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-scale: 1rem;
}

/* Modos de Accesibilidad */
body.high-contrast {
  --color-bg: #000000;
  --color-surface: #121212;
  --color-surface-alt: #222222;
  --color-primary: #64b5f6;
  --color-accent: #ffb74d;
  --color-text: #ffffff;
  --color-text-muted: #cccccc;
  --color-border: #444444;
}

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

body {
  font-family: var(--font-base);
  font-size: var(--font-scale);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

/* Header Institucional */
.top-nav {
  background-color: #ffffff;
  border-bottom: 3px solid var(--color-accent);
  padding: 0.75rem 1.5rem;
}

.logos-container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.logos-group {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.logo-item {
  height: 48px;
  max-width: 180px;
  object-fit: contain;
}

.accessibility-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--color-surface-alt);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
}

.accessibility-bar button {
  background: var(--color-primary);
  color: #fff;
  border: none;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
}

.accessibility-bar button:focus-visible {
  outline: 3px solid var(--color-accent);
}

/* Hero & Title */
.hero-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #ffffff;
  padding: 2.5rem 1.5rem;
  text-align: center;
}

.hero-header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.hero-header p {
  opacity: 0.9;
  max-width: 800px;
  margin: 0 auto;
}

/* Main Container */
.container {
  max-width: 1300px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

/* Dashboard Metrics */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.metric-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.2rem;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.metric-card .number {
  font-size: 2rem;
  font-weight: bold;
  color: var(--color-primary);
}

.metric-card.green .number { color: var(--status-green); }
.metric-card.yellow .number { color: var(--status-yellow); }
.metric-card.red .number { color: var(--status-red); }
.metric-card.gray .number { color: var(--status-gray); }

/* Control Panel & Filters */
.filters-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.filter-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.filter-group select, .filter-group input {
  padding: 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.95rem;
}

/* Grid de Acuerdos */
.acuerdos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1.5rem;
}

.acuerdo-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.acuerdo-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.acuerdo-header {
  padding: 1rem 1.2rem;
  background-color: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.badge-apartado {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
}

.badge-status {
  padding: 0.25rem 0.6rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 700;
}

.badge-status.concluido { background: var(--status-green-bg); color: var(--status-green); }
.badge-status.en_proceso { background: var(--status-yellow-bg); color: var(--status-yellow); }
.badge-status.pendiente { background: var(--status-red-bg); color: var(--status-red); }
.badge-status.sin_info { background: var(--status-gray-bg); color: var(--status-gray); }

.acuerdo-body {
  padding: 1.2rem;
  flex-grow: 1;
}

.acuerdo-carrera {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.acuerdo-titulo {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 0.6rem;
}

.progress-container {
  margin: 1rem 0 0.5rem 0;
}

.progress-bar-bg {
  height: 10px;
  background-color: var(--color-surface-alt);
  border-radius: 5px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--color-accent);
  transition: width 0.4s ease;
}

.acuerdo-footer {
  padding: 0.8rem 1.2rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--color-surface);
}

.btn-detalles {
  background: var(--color-primary);
  color: #ffffff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
}

.btn-detalles:hover {
  background: var(--color-primary-dark);
}

/* Modal Detalle */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--color-surface);
  border-radius: 8px;
  max-width: 700px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 2rem;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 1rem; right: 1rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-muted);
}

/* Footer */
footer {
  background-color: var(--color-primary);
  color: #ffffff;
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 3rem;
  border-top: 4px solid var(--color-accent);
}

/* Responsivo */
@media (max-width: 768px) {
  .logos-container {
    justify-content: center;
  }
  .hero-header h1 {
    font-size: 1.5rem;
  }
}