:root {
  --color-bg: #faf5eb;
  --color-primary: #fdaf0e;
  --color-danger: #fb2c36;
  --color-card-bg: #0f0f0f;
  --color-card-text: #faf5eb;
  --color-card-muted: #918e88;
  --color-field-bg: #262626;
  --color-field-border: #4b4a47;
  --color-field-border-focus: #787671;
  --radius: 0.125rem;
  --font-sans: 'Instrument Sans', system-ui, sans-serif;
  --font-mono: 'Chivo Mono', ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-card-bg);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.page {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6.5rem 1.25rem 2rem;
}

.gravity-nav {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 3.5rem;
  padding: 0 1.25rem 0 1.5rem;
  transform: translateX(-50%);
  background: rgba(15, 15, 15, 0.8);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-top: none;
  border-radius: 0 0 0.5rem 0.5rem;
  color: #fff;
  min-width: 20rem;
}

.gravity-nav-logo {
  display: flex;
  align-items: center;
  color: #fff;
}

.gravity-nav-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.gravity-nav-link:hover {
  color: var(--color-primary);
}

.card {
  width: 100%;
  max-width: 30rem;
  background: var(--color-card-bg);
  color: var(--color-card-text);
  border-radius: var(--radius);
  padding: 2.5rem;
}

h1 {
  margin: 0 0 0.75rem;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-card-text);
}

.lede {
  margin: 0 0 1.75rem;
  color: var(--color-card-muted);
  font-size: 0.95rem;
}

.field-label {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-card-muted);
}

textarea,
input[type='text'] {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--color-field-bg);
  border: 1px solid var(--color-field-border);
  border-radius: var(--radius);
  color: var(--color-card-text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  resize: vertical;
  transition: border-color 0.15s ease;
}

textarea::placeholder,
input[type='text']::placeholder {
  color: var(--color-card-muted);
}

textarea:focus,
input[type='text']:focus {
  outline: none;
  border-color: var(--color-field-border-focus);
}

form textarea {
  margin-bottom: 1.25rem;
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease, filter 0.15s ease;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-card-bg);
  box-shadow: inset 0 2px 0 rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.1);
}

.copy-field {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.copy-field .mono-field {
  width: 100%;
}

.notice {
  margin: 0 0 1.25rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
}

.notice-error {
  background: rgba(251, 44, 54, 0.12);
  color: #ff6b70;
  border: 1px solid var(--color-danger);
}

.footnote-inline {
  margin: 0 0 1.5rem;
  color: var(--color-card-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.link-back {
  color: var(--color-card-muted);
  font-size: 0.9rem;
  text-decoration: none;
}

.link-back:hover {
  color: var(--color-card-text);
}

.footnote {
  margin-top: 2rem;
  color: #918e88;
  font-size: 0.8rem;
  text-align: center;
}

@media (max-width: 480px) {
  .card {
    padding: 1.75rem;
  }
}