:root {
  --bg-start: #fff4e6;
  --bg-end: #ffe2e2;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #0f766e;
  --primary-hover: #115e59;
  --danger: #b91c1c;
  --border: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: linear-gradient(140deg, var(--bg-start), var(--bg-end));
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(100%, 460px);
  background: var(--card);
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
  padding: 24px;
}

h1 {
  margin: 0 0 8px;
  font-size: 1.5rem;
}

.subtitle {
  margin: 0 0 18px;
  color: var(--muted);
}

label {
  display: block;
  margin-bottom: 14px;
}

label span {
  display: block;
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 6px;
}

input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 12px;
  font-size: 1rem;
}

button {
  width: 100%;
  border: none;
  border-radius: 10px;
  padding: 12px;
  font-weight: 700;
  cursor: pointer;
  color: #fff;
  background: var(--primary);
}

button:hover {
  background: var(--primary-hover);
}

.error-box {
  margin: 0 0 14px;
  border-radius: 10px;
  padding: 10px 12px;
  background: #fee2e2;
  color: var(--danger);
  border: 1px solid #fecaca;
}

.success-box {
  margin: 0 0 14px;
  border-radius: 10px;
  padding: 10px 12px;
  background: #dcfce7;
  color: #166534;
  border: 1px solid #86efac;
}

.links {
  margin-top: 14px;
  font-size: 0.92rem;
  color: var(--muted);
}

.links a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.links a:hover {
  text-decoration: underline;
}