/* =============================================
   tesis.css — Estilos de tesis.php
   ============================================= */

.pagina-tesis {
  padding: 40px 0 60px;
}

/* ===== HERO ===== */
.tesis-hero {
  background: linear-gradient(135deg, var(--azul) 0%, var(--azul-hover) 100%);
  border-radius: var(--radio);
  padding: 40px 48px;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}

.tesis-hero::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
}

.tesis-hero::after {
  content: '';
  position: absolute;
  bottom: -60px; right: 60px;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
}

.tesis-hero h1 {
  font-family: 'Raleway', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  margin: 0 0 10px;
}

.tesis-hero p {
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
  margin: 0;
}

/* ===== VISOR PDF DESKTOP ===== */
.pdf-visor {
  background: #fff;
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  overflow: hidden;
  margin-bottom: 40px;
  border-top: 4px solid var(--azul);
}

.pdf-visor iframe {
  width: 100%;
  min-height: 100vh;
  border: none;
  display: block;
}

/* ===== VISOR PDF MÓVIL ===== */
.pdf-mobile {
  display: none;
  background: #fff;
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  padding: 40px 24px;
  text-align: center;
  margin-bottom: 40px;
  border-top: 4px solid var(--azul);
}

.pdf-mobile-icono {
  width: 80px;
  height: 80px;
  background: var(--gris-fondo);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.pdf-mobile-icono i {
  font-size: 36px;
  color: var(--azul);
}

.pdf-mobile h2 {
  font-family: 'Raleway', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--azul);
  margin-bottom: 10px;
}

.pdf-mobile p {
  font-size: 0.9rem;
  color: var(--texto-suave);
  margin-bottom: 28px;
  line-height: 1.6;
}

.pdf-mobile-btns {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 280px;
  margin: 0 auto;
}

.btn-ver {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--azul);
  color: #fff !important;
  text-decoration: none !important;
  padding: 13px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  font-family: 'Montserrat', sans-serif;
  transition: background 0.2s, transform 0.15s;
}

.btn-ver:hover {
  background: var(--azul-hover);
  transform: translateY(-2px);
}

.btn-descargar-pdf {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #fff;
  color: var(--azul) !important;
  text-decoration: none !important;
  padding: 13px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  font-family: 'Montserrat', sans-serif;
  border: 2px solid var(--azul);
  transition: background 0.2s, color 0.2s, transform 0.15s;
}

.btn-descargar-pdf:hover {
  background: var(--azul);
  color: #fff !important;
  transform: translateY(-2px);
}

/* ===== SECCIÓN DOCUMENTOS ===== */
.seccion-titulo {
  font-family: 'Raleway', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--azul);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.seccion-titulo::after {
  content: '';
  flex: 1;
  height: 2px;
  background: var(--gris-fondo);
  border-radius: 2px;
}

/* ===== GRID DOCUMENTOS ===== */
.docs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 40px;
}

@media (max-width: 991px) {
  .docs-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 575px) {
  .docs-grid { grid-template-columns: 1fr; }
}

/* ===== DOC CARD ===== */
.doc-card {
  background: #fff;
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  text-decoration: none !important;
  border-top: 4px solid var(--azul);
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.doc-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--azul), var(--azul-hover));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.doc-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--sombra-hover);
}

.doc-card:hover::after {
  transform: scaleX(1);
}

.doc-icono {
  width: 64px;
  height: 64px;
  background: var(--gris-fondo);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: background 0.25s, transform 0.25s;
}

.doc-card:hover .doc-icono {
  background: var(--azul);
  transform: scale(1.08) rotate(-4deg);
}

.doc-icono i {
  font-size: 28px;
  color: var(--azul);
  transition: color 0.25s;
}

.doc-card:hover .doc-icono i { color: #fff; }

.doc-titulo {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--texto);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 20px;
  transition: color 0.2s;
}

.doc-card:hover .doc-titulo { color: var(--azul); }

.doc-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--azul);
  color: #fff;
  padding: 8px 18px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  font-family: 'Montserrat', sans-serif;
  width: 100%;
  justify-content: center;
  transition: background 0.2s;
}

.doc-card:hover .doc-btn { background: var(--azul-hover); }

/* ===== RESPONSIVE ===== */
@media (max-width: 991px) {
  .pdf-visor { display: none; }
  .pdf-mobile { display: block; }
}

@media (max-width: 767px) {
  .tesis-hero { padding: 28px 24px; }
  .tesis-hero h1 { font-size: 1.5rem; }
}