:root {
  /* tm-style light system */
  --bg: #f9f9f9;
  --card: #ffffff;
  --border: rgba(0,0,0,0.10);
  --text: #222;
  --muted: #555;

  --danger: #ff6b6b;
  --ok: #51cf66;

  /* für Links / Fokus-States (neutral, hochwertig) */
  --accent: #111;

  --radius: 18px;
  --shadow: 0 8px 22px rgba(0,0,0,0.08);
  --shadow-hover: 0 14px 28px rgba(0,0,0,0.12);

  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
}

/* Links */
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.container {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 24px;
}

/* Card */
.card {
  width: 100%;
  max-width: 440px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.card:hover {
  box-shadow: var(--shadow-hover);
}

/* Brand */
.brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
  text-align: left;
}

.brand h1 {
  font-size: 20px;
  margin: 0;
  color: var(--text);
  letter-spacing: -0.02em;
}

.brand p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

/* Form */
.form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.label {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 8px;
  font-weight: 600;
}

.input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(0,0,0,0.12);
  background: #fff;
  color: var(--text);
  outline: none;
}

.input:focus {
  border-color: rgba(0,0,0,0.28);
  box-shadow: 0 0 0 4px rgba(0,0,0,0.08);
}

/* Button */
.btn {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0.2px;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.btn:hover {
  background: #1b1b1b;
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

.btn.secondary {
  border-color: rgba(0,0,0,0.14);
  background: #fff;
  color: var(--text);
}

.btn.secondary:hover {
  background: rgba(0,0,0,0.04);
}

/* Alert */
.alert {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(0,0,0,0.10);
  background: rgba(0,0,0,0.03);
  font-size: 13px;
  color: var(--text);
}

.alert.ok { border-color: rgba(81,207,102,0.35); color: #0f3d1f; background: rgba(81,207,102,0.14); }
.alert.err { border-color: rgba(255,107,107,0.35); color: #5a0f0f; background: rgba(255,107,107,0.16); }

/* Footer */
.small {
  font-size: 12px;
  color: var(--muted);
}

.footer {
  margin-top: 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
  flex-wrap: wrap;
}

/* Mobile */
@media (max-width: 600px){
  .container { padding: 18px 14px; }
  .card { padding: 22px 18px 18px; border-radius: 16px; }
  .brand h1 { font-size: 18px; }
  .brand p { font-size: 13px; }
  .footer { flex-direction: column; align-items: flex-start; gap: 10px; }
}