:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #5e6573;
  --border: #e5e7eb;
  --primary: #b80000;
  --primary-hover: #a00000;
  --ok-bg: #e8f5e9;
  --ok-fg: #1b5e20;
  --err-bg: #fdecea;
  --err-fg: #b00020;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border-radius: 14px;
  padding: 36px 32px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}

.card header {
  margin-bottom: 24px;
}
.logo {
  display: inline-block;
  font-weight: 800;
  font-size: 18px;
  color: var(--primary);
  letter-spacing: 1px;
  background: rgba(184,0,0,.08);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 14px;
}
.card h1 {
  font-size: 22px;
  margin: 4px 0 6px;
}
.card header p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

form { display: flex; flex-direction: column; gap: 14px; }
label {
  display: flex;
  flex-direction: column;
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
}
input {
  margin-top: 6px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  background: #fff;
  color: var(--text);
  transition: border-color .15s;
}
input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(184,0,0,.12);
}

button {
  margin-top: 6px;
  padding: 12px 18px;
  background: var(--primary);
  color: #fff;
  border: 0;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
}
button:hover { background: var(--primary-hover); }
button:disabled { opacity: .6; cursor: not-allowed; }

.msg { margin: 6px 0 0; font-size: 14px; min-height: 1.2em; }
.msg.ok { color: var(--ok-fg); background: var(--ok-bg); padding: 8px 12px; border-radius: 8px; }
.msg.error { color: var(--err-fg); background: var(--err-bg); padding: 8px 12px; border-radius: 8px; }

.hint {
  margin-top: 18px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}
.hint a { color: var(--primary); text-decoration: none; }
.hint a:hover { text-decoration: underline; }

footer {
  margin-top: 24px;
  color: var(--muted);
  text-align: center;
}
footer small { font-size: 12px; }