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

/* BASE */
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0b0c0f;
  color: #e5e7eb;
}

/* TOP BRAND BANNER */
.brand-banner {
  background: linear-gradient(90deg, #0f172a, #020617);
  color: #c7d2fe;
  text-align: center;
  padding: 6px 12px;
  font-size: 13px;
  border-bottom: 1px solid #1e293b;
}

.brand-banner span {
  color: #60a5fa;
  font-weight: 600;
}

/* HEADER */
.site-header {
  text-align: center;
  padding: 24px 16px 18px;
  border-bottom: 1px solid #1f2937;
}

.site-header h1 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.4px;
}

.site-header p {
  margin-top: 6px;
  font-size: 14px;
  color: #9ca3af;
}

/* NAVIGATION */
.main-nav {
  display: flex;
  gap: 8px;
  padding: 10px;
  background: #020617;
  border-bottom: 1px solid #1f2937;
  overflow-x: auto;
}

.main-nav button {
  background: #020617;
  color: #e5e7eb;
  border: 1px solid #1f2937;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.main-nav button:hover {
  background: #020617;
  border-color: #3b82f6;
  color: #93c5fd;
}

/* CONTENT */
.content {
  height: calc(100vh - 230px);
}

iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: #000;
}

/* FOOTER */
.site-footer {
  text-align: center;
  padding: 12px;
  font-size: 12px;
  color: #9ca3af;
  background: #020617;
  border-top: 1px solid #1f2937;
}