/* ============================
   CSS Reset (minimal)
============================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, Ubuntu, sans-serif;
}

/* ============================
   Farbvariablen
============================ */
:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --primary: #2563eb;
  --border: #e5e7eb;
  --error: #dc2626;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --card: #020617;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --primary: #3b82f6;
    --border: #1e293b;
    --error: #f87171;
  }
}

/* ============================
   Layout
============================ */
body {
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

/* Card */
.card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0,0,0,.1);
}

/* Heading */
h1 {
  margin: 0 0 0.5rem;
  font-size: 1.6rem;
}

.subtitle {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

/* ============================
   Forms
============================ */
.form-group {
  margin-bottom: 1.2rem;
}

label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
}

input {
  width: 100%;
  padding: 0.65rem 0.8rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 0.95rem;
}

input:focus {
  outline: none;
  border-color: var(--primary);
}

/* Button */
button {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.75rem;
  border-radius: 8px;
  border: none;
  background: var(--primary);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.05);
}

/* Error */
.error {
  background: color-mix(in srgb, var(--error) 10%, transparent);
  color: var(--error);
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}