:root {
  --bg: #0b0d14;
  --bg-2: #121624;
  --panel: #161b2c;
  --panel-2: #1d2338;
  --line: #2a3150;
  --text: #e8ebf5;
  --muted: #8b93b0;
  --accent: #22d3ee;
  --accent-2: #e879f9;
  --danger: #f43f5e;
  --radius: 14px;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  --mono: "Cascadia Code", "JetBrains Mono", Consolas, ui-monospace, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(34, 211, 238, 0.10), transparent 60%),
    radial-gradient(1000px 600px at 110% 10%, rgba(232, 121, 249, 0.10), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
}

a { color: var(--accent); }

.muted { color: var(--muted); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 20px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  font: 600 15px var(--font);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.08s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { border-color: var(--accent); background: #232a44; }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: linear-gradient(135deg, #0ea5e9, #8b5cf6);
  border-color: transparent;
  color: #fff;
}
.btn.primary:hover { filter: brightness(1.1); }
.btn.small { padding: 6px 12px; font-size: 13px; border-radius: 8px; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.brand-mark {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 0.04em;
}
.brand-mark span {
  font-weight: 300;
  margin-left: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ----- centered pages (login / errors) ----- */
.center-page {
  display: grid;
  place-items: center;
  padding: 16px;
}
.login-card {
  width: min(420px, 100%);
  padding: 36px 32px;
  text-align: center;
}
.login-card h1 { font-size: 24px; margin: 18px 0 6px; }
.login-card p { margin: 0 0 24px; }
.login-card .btn { width: 100%; }
.login-card .fine { font-size: 13px; margin-top: 18px; margin-bottom: 0; }
.notice {
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 14px;
  margin-bottom: 18px;
}
.hidden { display: none !important; }

/* ----- top bar ----- */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 13, 20, 0.7);
  backdrop-filter: blur(8px);
}
.topbar .brand-mark { text-decoration: none; color: var(--text); }
.topbar .spacer { flex: 1; }
.topbar .user { color: var(--muted); font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

@media (max-width: 600px) {
  .topbar { padding: 12px 16px; gap: 10px; }
  .topbar .user, .topbar .title { display: none; }
}