* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', Arial, sans-serif; }

/* Header */
header {
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
  padding: 0 40px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-icon {
  width: auto;
  height: 442px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}
.logo-icon img {
  height: 100%;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  display: block;
}
.logo-icon svg {
  width: 18px;
  height: 18px;
  fill: white;
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1C352F;
  letter-spacing: -0.3px;
}
.logo-text span {
  font-weight: 400;
  font-size: 0.75rem;
  color: #6b7280;
  vertical-align: super;
}

/* Nav */
nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
nav a {
  color: #374151;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}
nav a:hover {
  background: #f3f4f6;
  color: #1C352F;
}
nav a.active {
  background: #1C352F;
  color: #ffffff;
}
nav a.active:hover {
  background: #16292400;
  color: #1C352F;
}

/* Iframe */
iframe {
  width: 100%;
  height: calc(100vh - 68px);
  border: none;
  display: block;
}