:root {
  color-scheme: light dark;
  --bg: #eef2f3;
  --panel: #ffffff;
  --text: #1c2526;
  --muted: #667274;
  --line: #d5dede;
  --accent: #176b87;
  --accent-hover: #0f5870;
  --danger: #a62920;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12171a;
    --panel: #1a2126;
    --text: #e4eaea;
    --muted: #93a3a2;
    --line: #344047;
    --accent: #58b0cc;
    --accent-hover: #72bdd4;
    --danger: #f0a08c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

.login-layout {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(100%, 380px);
  padding: 32px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 16px 44px rgba(20, 35, 40, 0.12);
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
}

h1 { margin: 0; font-size: 28px; letter-spacing: 0; }
p { margin: 8px 0 24px; color: var(--muted); }
form { display: grid; gap: 16px; }
label { display: grid; gap: 7px; font-size: 13px; font-weight: 600; }

input, button {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
}

input { background: var(--panel); color: var(--text); }
input:focus { outline: 3px solid color-mix(in srgb, var(--accent) 22%, transparent); border-color: var(--accent); }
button { margin-top: 4px; border-color: var(--accent); background: var(--accent); color: #fff; font-weight: 700; cursor: pointer; }
button:hover:not(:disabled) { background: var(--accent-hover); }
button:disabled { opacity: 0.65; cursor: wait; }
.login-error { color: var(--danger); font-size: 13px; }