:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --text: #1d2330;
  --muted: #5d6677;
  --border: #d6dae1;
  --accent: #2f5bd3;
  --accent-hover: #2449ad;
  --error-bg: #fdecec;
  --error-text: #a12222;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171d;
    --surface: #1d2129;
    --text: #e6e8ec;
    --muted: #9aa2b1;
    --border: #353b47;
    --accent: #6b8cff;
    --accent-hover: #8aa5ff;
    --error-bg: #3a1d1f;
    --error-text: #ffb4b4;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.login-page main {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
}

.card {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
}

.card h1 { margin: 0; font-size: 1.6rem; }
.subtitle { margin: 4px 0 24px; color: var(--muted); }

form label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin: 16px 0 6px;
}

form input[type="text"],
form input[type="password"] {
  width: 100%;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}

form input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.btn {
  width: 100%;
  margin-top: 24px;
  padding: 11px;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}
.btn:hover { background: var(--accent-hover); }

.error {
  margin: 0 0 8px;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--error-bg);
  color: var(--error-text);
  font-size: 0.9rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; }
.logout { display: flex; align-items: center; gap: 12px; }
.who { color: var(--muted); font-size: 0.9rem; }

.btn-link {
  background: none;
  border: 0;
  padding: 0;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
}
.btn-link:hover { text-decoration: underline; }

.panel {
  max-width: 900px;
  margin: 32px auto;
  padding: 0 16px;
}