* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    linear-gradient(160deg, #15202b 0%, transparent 42%),
    radial-gradient(900px 500px at 100% -10%, #243447 0%, transparent 55%),
    var(--bg);
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea {
  font: inherit;
  color: var(--field-text);
  background: var(--field-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
}
input, select, textarea { padding: 0.5rem 0.75rem; }
input::placeholder, textarea::placeholder { color: var(--placeholder); opacity: 1; }
select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 14px) calc(50% - 2px), calc(100% - 9px) calc(50% - 2px);
  background-size: 5px 5px;
  background-repeat: no-repeat;
  padding-right: 1.75rem;
}
select option { background: var(--panel); color: var(--text); }
button { background: var(--panel-2); cursor: pointer; }

.app-shell { min-height: 100vh; display: flex; flex-direction: column; }
.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 88%, black);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-weight: 700; letter-spacing: -0.03em; font-size: 1.1rem; }
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem;
  margin-right: auto;
  padding: 0.2rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-2);
}
.nav-link {
  padding: 0.4rem 0.75rem;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--muted);
}
.nav-link:hover { color: var(--text); border-color: var(--line); }
.nav-link.active {
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 22%, var(--panel-2));
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
}
.content { width: min(1180px, 100%); margin: 0 auto; padding: 1.25rem; flex: 1; }
.page-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-bottom: 1.1rem;
}
.page-head h1 { margin: 0 0 0.3rem; font-size: clamp(1.4rem, 2.5vw, 1.85rem); letter-spacing: -0.03em; }
.lede, .muted { color: var(--muted); }
.lede { margin: 0; }
.mono { font-family: var(--mono); font-size: 0.86rem; color: var(--text); }
.mono.muted { color: var(--muted); }

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 8px;
  padding: 0.5rem 0.85rem;
  cursor: pointer;
}
.btn:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); color: var(--text); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.primary {
  background: color-mix(in srgb, var(--accent) 28%, var(--panel-2));
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
}
.btn.ghost { color: var(--muted); }
.btn.danger { color: #ffb4b4; border-color: color-mix(in srgb, var(--bad) 45%, var(--line)); }
.btn-sm { padding: 0.35rem 0.6rem; font-size: 0.88rem; }

.card {
  background: color-mix(in srgb, var(--panel) 92%, black);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  color: var(--text);
}
.modal {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  padding: 0;
  width: min(440px, calc(100% - 2rem));
}
.modal::backdrop { background: rgba(0, 0, 0, 0.55); }
.modal-body { display: grid; gap: 0.7rem; padding: 1.1rem; }
.modal-body h2 { margin: 0; }
.modal-actions { display: flex; gap: 0.5rem; justify-content: flex-end; margin-top: 0.3rem; }
.tab-bar { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.tab-btn {
  display: inline-block;
  box-sizing: border-box;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  border-radius: 8px;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  font-size: 0.9rem;
}
.tab-btn:hover, .tab-btn.active { color: var(--text); }
.tab-btn.active {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}
.tab-panel[hidden] { display: none !important; }
.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  background: #0f171f;
  border: 1px solid var(--accent);
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .18s, transform .18s;
  pointer-events: none;
  z-index: 50;
}
.toast.show { opacity: 1; transform: translateY(0); }