:root {
  color-scheme: dark;
  --background: #000000;
  --surface: #111111;
  --line: #3d3d3d;
  --muted: #a7a7a7;
  --white: #ffffff;
  --danger: #ff8d8d;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--background);
  color: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.45;
}

button,
input,
textarea {
  font: inherit;
}

.survey-shell {
  width: min(100%, 680px);
  margin: 0 auto;
  padding: 22px 20px 56px;
}

.survey-header {
  margin-bottom: 42px;
  text-align: center;
}

.survey-logo {
  display: block;
  width: min(100%, 260px);
  height: auto;
  margin: 0 auto 28px;
}

h1 {
  max-width: 560px;
  margin: 0;
  font-size: clamp(2.25rem, 10vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
  margin-left: auto;
  margin-right: auto;
}

.intro {
  max-width: 430px;
  margin: 22px auto 0;
  color: var(--muted);
  font-size: 1rem;
}

.form-section {
  margin: 0 0 32px;
  padding: 0;
  border: 0;
}

.field-label,
legend {
  display: block;
  margin-bottom: 11px;
  padding: 0;
  color: var(--white);
  font-size: 1rem;
  font-weight: 700;
}

input[type="text"],
input[type="email"],
textarea {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--white);
  outline: 0;
  transition: border-color 160ms ease, background-color 160ms ease;
}

input[type="text"],
input[type="email"] {
  min-height: 56px;
  padding: 14px 16px;
}

textarea {
  min-height: 140px;
  padding: 14px 16px;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: #777777;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
  border-color: var(--white);
  background: #181818;
}

.choice-list {
  display: grid;
  gap: 10px;
}

.conditional-section[hidden],
.resources[hidden] {
  display: none;
}

.resources {
  display: grid;
  gap: 14px;
  margin: -4px 0 32px;
  width: 100%;
  color: var(--white);
}

.article-link {
  display: grid;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  gap: 5px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--white);
  text-decoration: none;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.article-link:hover,
.article-link:focus-visible {
  border-color: var(--white);
  background: #181818;
}

.article-label {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-link strong {
  font-size: 1.2rem;
}

.article-link span {
  color: var(--muted);
  font-size: 0.9rem;
}

.article-cta {
  margin-top: 8px;
  color: var(--white);
  font-weight: 700;
}

.modal {
  position: fixed;
  z-index: 10;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(0, 0, 0, 0.75);
}

.modal[hidden] {
  display: none;
}

.modal-card {
  width: min(100%, 380px);
  padding: 38px 30px 30px;
  background: var(--white);
  color: var(--background);
  text-align: center;
}

.modal-card p {
  margin: 0 0 28px;
  font-size: 1.2rem;
}

.modal-close {
  margin-top: 0;
  background: var(--background);
  color: var(--white);
}

.modal-close:hover,
.modal-close:focus-visible {
  background: transparent;
  color: var(--background);
  border-color: var(--background);
}

.video-placeholder {
  color: var(--muted);
  text-align: center;
}

.choice-card {
  display: flex;
  min-height: 56px;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.choice-card:has(input:checked) {
  border-color: var(--white);
  background: var(--surface);
}

.choice-card input {
  width: 20px;
  height: 20px;
  margin: 0;
  accent-color: var(--white);
}

.drawing-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.clear-button {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.85rem;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.clear-button:hover,
.clear-button:focus-visible {
  color: var(--white);
}

.canvas-wrap {
  overflow: hidden;
  border: 1px solid var(--white);
  border-radius: 10px;
  background: var(--white);
  touch-action: none;
}

canvas {
  display: block;
  width: 100%;
  height: 280px;
  cursor: crosshair;
  touch-action: none;
}

.field-hint {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.submit-button {
  width: 100%;
  min-height: 58px;
  margin-top: 8px;
  border: 1px solid var(--white);
  border-radius: 10px;
  background: var(--white);
  color: var(--background);
  cursor: pointer;
  font-weight: 700;
  transition: background-color 160ms ease, color 160ms ease, opacity 160ms ease;
}

.submit-button:hover,
.submit-button:focus-visible {
  background: transparent;
  color: var(--white);
}

.submit-button:disabled {
  cursor: wait;
  opacity: 0.55;
}

.form-status {
  min-height: 24px;
  margin: 16px 0 0;
  color: var(--muted);
  text-align: center;
}

.form-status.error {
  color: var(--danger);
}

@media (min-width: 600px) {
  .survey-shell {
    padding: 38px 32px 80px;
  }

  .survey-header {
    margin-bottom: 58px;
  }

  .choice-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .choice-card {
    align-items: flex-start;
    flex-direction: column;
  }
}