:root {
  --bg: #0c0812;
  --bg-elevated: #150f1e;
  --card: #1a1226;
  --card-alt: #201830;
  --border: rgba(168, 130, 255, 0.14);
  --text: #f3f0fa;
  --text-dim: #a89dc2;
  --hint: #766a8c;
  --purple: #8b5cf6;
  --purple-bright: #a78bfa;
  --gradient: linear-gradient(135deg, #a78bfa 0%, #7c3aed 45%, #2e1065 100%);
  --success: #34d399;
  --destructive: #f87171;
  --warning: #fbbf24;
  --radius: 14px;
  --radius-sm: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  background-image: radial-gradient(circle at 50% -10%, rgba(139, 92, 246, 0.16), transparent 55%);
  color: var(--text);
  min-height: 100vh;
}

a { color: var(--purple-bright); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }

.hidden { display: none !important; }

/* ---------- Top nav (лендинг) ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 24px;
}
.topbar .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.topbar .brand .logo {
  width: 34px; height: 34px; border-radius: 10px; background: var(--gradient);
  display: flex; align-items: center; justify-content: center; font-weight: 700;
}
.topbar .actions { display: flex; gap: 10px; }

/* ---------- Buttons ---------- */
.btn-primary, .btn-secondary, .btn-link, .btn-danger {
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
}
.btn-primary { background: var(--gradient); color: #fff; }
.btn-secondary { background: var(--card-alt); color: var(--text); border: 1px solid var(--border); }
.btn-danger { background: rgba(248, 113, 113, 0.12); color: var(--destructive); border: 1px solid rgba(248, 113, 113, 0.3); }
.btn-link { background: none; color: var(--text-dim); padding: 4px 0; }
.btn-link:hover { color: var(--text); text-decoration: none; }
.btn-small { padding: 6px 12px; font-size: 12px; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- Landing ---------- */
.hero {
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 24px 40px;
  text-align: center;
}
.hero h1 { font-size: 38px; margin: 0 0 16px; }
.hero h1 span { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--text-dim); font-size: 17px; line-height: 1.6; max-width: 640px; margin: 0 auto 28px; }
.hero .actions { display: flex; justify-content: center; gap: 12px; }

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 24px;
}
.section h2 { font-size: 22px; margin-bottom: 20px; }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.feature-card .icon { font-size: 24px; margin-bottom: 10px; }
.feature-card h3 { margin: 0 0 8px; font-size: 15px; }
.feature-card p { margin: 0; color: var(--text-dim); font-size: 13px; line-height: 1.5; }

.models-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.model-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}
.model-card .name { font-size: 14px; font-weight: 600; }
.model-card .brand { font-size: 12px; color: var(--hint); }
.model-price {
  font-size: 12px;
  color: var(--purple-bright);
  background: rgba(139, 92, 246, 0.12);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}

.footer {
  text-align: center;
  color: var(--hint);
  font-size: 12px;
  padding: 30px 24px 40px;
}

/* ---------- Auth screens (login/register) ---------- */
.auth-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.auth-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  width: 100%;
  max-width: 360px;
}
.auth-card .logo {
  width: 52px; height: 52px; border-radius: 15px; background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 24px; margin: 0 auto 16px;
}
.auth-card h1 { font-size: 19px; margin: 0 0 4px; text-align: center; }
.auth-card .sub { color: var(--text-dim); font-size: 13px; text-align: center; margin-bottom: 22px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 6px; }
.field input {
  width: 100%;
  background: var(--card-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 12px;
  color: var(--text);
  font-size: 14px;
}
.field input:focus { outline: none; border-color: var(--purple); }
.auth-card .btn-primary { width: 100%; padding: 12px; margin-top: 4px; }
.auth-error {
  color: var(--destructive);
  font-size: 13px;
  margin-top: 14px;
  text-align: center;
}
.auth-switch { text-align: center; font-size: 13px; color: var(--text-dim); margin-top: 18px; }

/* ---------- Dashboard app shell ---------- */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 12px;
}
.sidebar .brand { display: flex; align-items: center; gap: 10px; padding: 0 8px 20px; }
.sidebar .brand .logo {
  width: 32px; height: 32px; border-radius: 9px; background: var(--gradient);
  display: flex; align-items: center; justify-content: center; font-weight: 700;
}
.nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.nav-item {
  display: block;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-dim);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
}
.nav-item:hover { background: var(--card-alt); color: var(--text); }
.nav-item.active { background: var(--card-alt); color: var(--text); font-weight: 600; }
.sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 8px 0;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-dim);
}

.main { flex: 1; padding: 28px 32px; max-width: 900px; }
.tab h2 { margin: 0 0 20px; font-size: 20px; }
.tab-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.balance-card { display: flex; justify-content: space-between; align-items: center; }
.balance-card .amount { font-size: 30px; font-weight: 700; }
.balance-card .label { color: var(--text-dim); font-size: 13px; margin-bottom: 4px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; color: var(--text-dim); font-weight: 500; padding: 8px 10px; border-bottom: 1px solid var(--border); }
td { padding: 10px; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }

.tabs-inline { display: flex; gap: 8px; margin-bottom: 16px; }
.tabs-inline button {
  background: var(--card-alt); border: 1px solid var(--border); color: var(--text-dim);
  padding: 7px 14px; border-radius: 999px; font-size: 13px;
}
.tabs-inline button.active { background: var(--gradient); color: #fff; border-color: transparent; }

.key-value { font-family: ui-monospace, monospace; font-size: 12px; background: var(--card-alt); padding: 8px 10px; border-radius: var(--radius-sm); word-break: break-all; }

.empty-state { color: var(--hint); font-size: 13px; padding: 24px 0; text-align: center; }

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--card-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-size: 13px;
  z-index: 100;
}
.toast.success { border-color: rgba(52, 211, 153, 0.4); color: var(--success); }
.toast.error { border-color: rgba(248, 113, 113, 0.4); color: var(--destructive); }

code, pre {
  font-family: ui-monospace, monospace;
  font-size: 12.5px;
}
pre {
  background: var(--card-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

@media (max-width: 720px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; align-items: center; overflow-x: auto; }
  .sidebar .brand { padding: 0 8px 0 0; }
  .nav { flex-direction: row; }
  .sidebar-footer { flex-direction: row; align-items: center; border-top: none; border-left: 1px solid var(--border); margin-left: 8px; padding: 0 0 0 12px; }
  .main { padding: 20px; }
  .grid-2 { grid-template-columns: 1fr; }
}