:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #18212f;
  --muted: #687587;
  --line: #d9e0ea;
  --accent: #06c755;
  --accent-dark: #05a947;
  --danger: #c93535;
  --focus: #1f6feb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.shell {
  width: min(100%, 640px);
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  box-shadow: 0 10px 24px rgb(24 33 47 / 8%);
}

h1 {
  margin: 0 0 8px;
  font-size: 1.55rem;
  line-height: 1.35;
}

p {
  margin: 0 0 16px;
  line-height: 1.7;
}

.muted {
  color: var(--muted);
}

.account {
  padding: 12px;
  margin: 16px 0 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
}

.account span {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 4px;
}

.form-grid {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 7px;
  font-weight: 700;
}

input,
select,
textarea,
button {
  width: 100%;
  font: inherit;
}

input,
select,
textarea {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  background: #fff;
  color: var(--text);
}

textarea {
  min-height: 96px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus,
button:focus-visible {
  outline: 3px solid rgb(31 111 235 / 25%);
  border-color: var(--focus);
}

button {
  min-height: 48px;
  border: 0;
  border-radius: 6px;
  padding: 12px 16px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  cursor: pointer;
}

button:hover {
  background: var(--accent-dark);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

.error {
  border: 1px solid rgb(201 53 53 / 35%);
  background: #fff6f6;
  color: var(--danger);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 16px;
}

.success {
  border: 1px solid rgb(6 199 85 / 30%);
  background: #f0fff6;
  border-radius: 8px;
  padding: 12px;
  margin-top: 16px;
}

.actions {
  margin-top: 8px;
}

.loading {
  color: var(--muted);
  text-align: center;
  padding: 40px 0;
}

@media (max-width: 480px) {
  .shell {
    padding: 12px;
  }

  .panel {
    padding: 18px;
  }
}