/* ============================================================
   Congreso Internacional de Tecnología e Innovación
   Estilos — misma paleta institucional usada en la Sesión 4
   ============================================================ */

:root {
  --azul: #001f5f;
  --azul-2: #004eea;
  --azul-2-claro: #4d8cff;
  --naranja: #ff6a3d;
  --naranja-suave: #fff1eb;
  --bg: #f7f9fc;
  --card: #ffffff;
  --text: #0b1b3f;
  --text-muted: #5c6b8a;
  --border: #e4eaf7;
  --radius: 18px;
  --shadow: 0 10px 30px -12px rgba(0, 31, 95, 0.18);
}

* { box-sizing: border-box; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

h1, h2, h3, h4, .display-font {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-weight: 700;
  letter-spacing: -0.01em;
}

a { text-decoration: none; }

/* ---------- Navbar ---------- */
.navbar-congreso {
  background: rgba(247, 249, 252, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.navbar-brand-congreso {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  color: var(--azul) !important;
  font-size: 1.15rem;
}

.navbar-brand-congreso .badge-acento {
  background: var(--naranja);
  color: #fff;
  border-radius: 6px;
  padding: 0.15rem 0.5rem;
  font-size: 0.7rem;
  margin-left: 0.35rem;
  vertical-align: middle;
}

.nav-link-congreso {
  color: var(--text-muted) !important;
  font-weight: 500;
  font-size: 0.93rem;
}

.nav-link-congreso:hover { color: var(--azul) !important; }

.btn-naranja {
  background: var(--naranja);
  border: none;
  color: #fff;
  font-weight: 600;
  border-radius: 10px;
  padding: 0.55rem 1.3rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn-naranja:hover {
  background: #ef5a2c;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px -6px rgba(255, 106, 61, 0.55);
}
.btn-naranja:disabled { background: #c9cede; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-azul-outline {
  border: 1.5px solid var(--azul-2);
  color: var(--azul-2);
  font-weight: 600;
  border-radius: 10px;
  padding: 0.5rem 1.2rem;
  background: transparent;
}
.btn-azul-outline:hover { background: var(--azul-2); color: #fff; }

/* ---------- Hero ---------- */
.hero-congreso {
  background:
    radial-gradient(circle at 15% 20%, rgba(0, 78, 234, 0.35), transparent 45%),
    radial-gradient(circle at 85% 0%, rgba(255, 106, 61, 0.3), transparent 40%),
    var(--azul);
  color: #eaf1ff;
  padding: 5.5rem 0 4.5rem;
  position: relative;
  overflow: hidden;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #cfe0ff;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(2.1rem, 4.5vw, 3.4rem);
  line-height: 1.08;
  margin: 1.1rem 0 1rem;
}

.hero-title .acento { color: var(--naranja); }

.hero-sub { color: #a9bde3; font-size: 1.1rem; max-width: 620px; }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.6rem;
  margin-top: 1.8rem;
  font-size: 0.92rem;
  color: #cfe0ff;
}
.hero-meta span { display: flex; align-items: center; gap: 0.45rem; }
.hero-meta i { color: var(--naranja); }

/* ---------- Stat pills (cupos) ---------- */
.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem;
  box-shadow: var(--shadow);
  height: 100%;
}
.stat-card .stat-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--azul);
  line-height: 1;
}
.stat-card.acento .stat-value { color: var(--naranja); }
.stat-card .stat-label { color: var(--text-muted); font-size: 0.88rem; margin-top: 0.4rem; }

.stat-card-float {
  margin-top: -4.2rem;
  position: relative;
  z-index: 5;
}

/* ---------- Section headers ---------- */
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--azul-2);
}
.section-title { font-size: clamp(1.6rem, 3vw, 2.2rem); margin: 0.5rem 0 0.8rem; color: var(--azul); }
.section-sub { color: var(--text-muted); max-width: 640px; }

/* ---------- Highlight / feature cards ---------- */
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.7rem;
  height: 100%;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--naranja-suave);
  color: var(--naranja);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

/* ---------- Ejes temáticos chips ---------- */
.eje-chip {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.1rem 1.2rem;
  height: 100%;
  font-weight: 600;
  color: var(--azul);
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.eje-chip i { color: var(--azul-2); font-size: 1.15rem; }

/* ---------- Formulario ---------- */
.form-section {
  background: var(--azul);
  border-radius: 24px;
  padding: 3rem 2.5rem;
  color: #eaf1ff;
}
.form-section .form-control, .form-section .form-select {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.18);
  color: #eaf1ff;
  border-radius: 10px;
  padding: 0.65rem 0.9rem;
}
.form-section .form-control::placeholder { color: #8fa3d0; }
.form-section .form-control:focus, .form-section .form-select:focus {
  background: rgba(255,255,255,0.09);
  border-color: var(--naranja);
  box-shadow: 0 0 0 0.2rem rgba(255, 106, 61, 0.25);
  color: #fff;
}
.form-section label { color: #cfe0ff; font-size: 0.85rem; font-weight: 600; margin-bottom: 0.3rem; }
.form-section .form-select option { color: #0b1b3f; }

/* ---------- Footer ---------- */
.footer-congreso {
  background: #04123b;
  color: #93a6d6;
  padding: 2.5rem 0;
  font-size: 0.9rem;
}
.footer-congreso a { color: #cfe0ff; }
.footer-congreso a:hover { color: var(--naranja); }

/* ============================================================
   Panel de administración
   ============================================================ */
.admin-shell { min-height: 100vh; background: var(--bg); }

.admin-topbar {
  background: var(--azul);
  color: #eaf1ff;
  padding: 1rem 1.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.admin-topbar .brand { font-family: 'Space Grotesk', sans-serif; font-weight: 700; }
.admin-topbar .brand .acento { color: var(--naranja); }

.kpi-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
  box-shadow: var(--shadow);
  height: 100%;
}
.kpi-card .kpi-icon {
  width: 42px; height: 42px; border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 0.8rem; font-size: 1.15rem;
}
.kpi-icon.blue { background: #e7edff; color: var(--azul-2); }
.kpi-icon.orange { background: var(--naranja-suave); color: var(--naranja); }
.kpi-icon.navy { background: #e3e9fb; color: var(--azul); }
.kpi-value { font-family: 'Space Grotesk', sans-serif; font-size: 1.9rem; font-weight: 700; color: var(--azul); }
.kpi-label { color: var(--text-muted); font-size: 0.85rem; }

.admin-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.table-inscritos thead th {
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
}
.table-inscritos td { vertical-align: middle; font-size: 0.92rem; }
.badge-eje {
  background: #e7edff;
  color: var(--azul-2);
  font-weight: 600;
  border-radius: 999px;
  padding: 0.32rem 0.7rem;
  font-size: 0.76rem;
  white-space: nowrap;
  display: inline-block;
}

.login-card {
  max-width: 400px;
  margin: 8vh auto;
  background: var(--card);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: 2.4rem 2.2rem;
}