:root {
  --primary: #6750a4;
  --primary-dark: #58468c;
  --bg: #f6f4fb;
  --card: #ffffff;
  --text: #1d1b20;
  --muted: #5a5661;
  --error: #b3261e;
  --success: #1e7d43;
  --border: #e2dfee;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
}

main {
  width: 100%;
  max-width: 440px;
}

.brand {
  text-align: center;
  font-size: 1.35rem;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--primary);
}

.tagline {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 20px;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.icon {
  font-size: 2.6rem;
  line-height: 1;
  margin-bottom: 8px;
}

.icon.success { color: var(--success); }
.icon.error { color: var(--error); }
.icon.info { color: var(--primary); }

h1 {
  font-size: 1.15rem;
  margin: 0 0 8px;
}

p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.detail {
  font-size: 0.82rem;
  word-break: break-word;
  background: var(--bg);
  border-radius: 8px;
  padding: 8px 10px;
}

.btn {
  display: inline-block;
  margin-top: 14px;
  padding: 11px 22px;
  border: none;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover { background: var(--primary-dark); }
.btn:disabled { opacity: 0.6; cursor: default; }

.btn-block { display: block; width: 100%; }

.link {
  display: inline-block;
  margin-top: 14px;
  color: var(--primary);
  font-size: 0.9rem;
}

form {
  text-align: left;
  margin-top: 16px;
}

label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 12px;
}

input {
  display: block;
  width: 100%;
  margin-top: 5px;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  background: #fff;
  color: var(--text);
}

input:focus {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
  border-color: var(--primary);
}

.err {
  color: var(--error);
  font-size: 0.82rem;
  margin: -6px 0 10px;
}

.hidden { display: none !important; }

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.78rem;
  margin-top: 16px;
}