/* Page frame: header, navigation, pages, panels and grid. */
header {
  border-bottom: 1px solid #393530;
  background: #151412e8;
  position: sticky;
  top: 0;
  z-index: 5;
}

.nav {
  max-width: 1120px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 17px 20px;
  gap: 15px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 24px; font-weight: 800; letter-spacing: -1px; color: inherit; text-decoration: none; }
.brand:hover { color: var(--gold); }
.brand img { display: block; height: 34px; width: auto; flex: none; }

.navlinks { display: flex; gap: 10px; }
.navlinks button { background: transparent; color: #dcd2c5; border: 0; padding: 10px 14px; border-radius: 12px; }
.navlinks button.active, .navlinks button:hover { background: #302c26; }

main {
  flex: 1;
  width: 100%;
  max-width: 1120px;
  margin: 30px auto 0;
  padding: 0 20px 28px;
  display: flex;
  flex-direction: column;
}

.page { display: none; }
.page.active { display: block; }

.panel {
  background: linear-gradient(145deg, #22201d, #181716);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: clamp(18px, 3vw, 36px);
  box-shadow: 0 25px 70px #0004;
}

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }

.subpanel {
  border: 1px solid #4c4740;
  background: #171615;
  border-radius: 23px;
  padding: 24px;
  min-width: 0;
}

.divider { height: 1px; background: #403a32; margin: 24px 0; }
.footer { margin-top: auto; padding-top: 28px; color: #777069; font-size: 12px; }

@media (max-width: 750px) {
  .grid { grid-template-columns: 1fr; }
  .nav { padding: 13px 15px; }
  .brand { font-size: 20px; }
  .navlinks { gap: 0; }
  .navlinks button { font-size: 12px; padding: 9px; }
  .subpanel { padding: 17px; }
  .panel { padding: 17px; }
}

@media (max-width: 650px) {
  .navlinks button { font-size: 11px; padding: 8px 6px; }
  .brand { font-size: 18px; }
}

@media (max-width: 480px) {
  .subpanel { padding: 14px; }
}