:root {
  --bg: #0d1526;
  --surface: #141d33;
  --border: rgba(148, 197, 255, .14);
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --danger: #ec4899;
  --success: #22c55e;
  --ff: 'Segoe UI', system-ui, sans-serif;
  --ff-mono: 'Consolas', monospace;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--ff);
  min-height: 100vh;
}

.auth-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 32px;
  width: 100%;
  max-width: 380px;
}
.auth-card h1 {
  font-size: 1.3rem;
  margin: 0 0 6px;
}
.auth-card .sub {
  color: var(--muted);
  font-size: .85rem;
  margin: 0 0 24px;
}
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field label { font-size: .78rem; color: var(--muted); }
.field input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: .92rem;
  outline: none;
}
.field input:focus { border-color: var(--accent); }
.btn {
  width: 100%;
  padding: 11px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #04070d;
  font-weight: 600;
  font-size: .92rem;
  cursor: pointer;
  margin-top: 6px;
}
.btn:hover { opacity: .92; }
.error-msg {
  background: color-mix(in srgb, var(--danger) 14%, transparent);
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: .82rem;
  margin-bottom: 16px;
}
.hint { color: var(--muted); font-size: .76rem; margin-top: 16px; text-align: center; }
.flash { border-radius: 8px; padding: 10px 12px; font-size: .85rem; margin: 16px 0; }
.flash.success { background: color-mix(in srgb, var(--success) 14%, transparent); border: 1px solid var(--success); color: var(--success); }
.flash.error { background: color-mix(in srgb, var(--danger) 14%, transparent); border: 1px solid var(--danger); color: var(--danger); }

/* App shell (post-login pages) */
.app-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; border-bottom: 1px solid var(--border);
}
.app-nav a { color: var(--muted); text-decoration: none; font-size: .85rem; margin-right: 18px; }
.app-nav a:hover, .app-nav a.active { color: var(--text); }
.app-brand { font-weight: 700; letter-spacing: .04em; }
.app-main { padding: 28px 24px; max-width: 1100px; margin: 0 auto; }