:root {
  color-scheme: light;
  --background: #ffffff;
  --foreground: #09090b;
  --muted: #71717a;
  --card: #ffffff;
  --border: #e4e4e7;
  --soft: #f4f4f5;
  --primary: #d71920;
  --primary-foreground: #ffffff;
  --brand-ink: #18181b;
  --ring: rgba(215, 25, 32, 0.26);
  --danger: #dc2626;
  --shadow: 0 16px 42px rgba(15, 23, 42, 0.08);
}

html.dark {
  color-scheme: dark;
  --background: #09090b;
  --foreground: #fafafa;
  --muted: #a1a1aa;
  --card: #111113;
  --border: #27272a;
  --soft: #1c1c20;
  --primary: #ef343b;
  --primary-foreground: #ffffff;
  --brand-ink: #fafafa;
  --ring: rgba(239, 52, 59, 0.32);
  --shadow: 0 18px 46px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--background);
  color: var(--foreground);
  font-family: "Geist", Arial, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  width: 100%;
  background: color-mix(in srgb, var(--background) 94%, transparent);
  backdrop-filter: blur(12px);
}

.nav-shell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1120px;
  height: 92px;
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--brand-ink);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.1;
}

.brand-logo {
  width: 220px;
  height: auto;
  flex: 0 0 auto;
  object-fit: contain;
}

.nav-links {
  position: absolute;
  left: 50%;
  display: flex;
  gap: 4px;
  transform: translateX(-50%);
}

.nav-links a {
  min-height: 40px;
  padding: 10px 14px;
  border-radius: 6px;
  color: var(--foreground);
  font-size: 14px;
  font-weight: 500;
}

.nav-links a:hover {
  background: var(--soft);
}

.icon-button,
.language-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 36px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--background);
  color: var(--foreground);
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.icon-button {
  position: relative;
  width: 36px;
  padding: 0;
}

.language-button {
  padding: 7px 12px;
  font-size: 14px;
  font-weight: 500;
}

.icon-button:hover,
.language-button:hover,
.option-button:hover {
  background: var(--soft);
}

.icon-button:active,
.language-button:active,
.option-button:active,
.submit-button:active {
  transform: translateY(1px);
}

.moon {
  display: none;
}

html.dark .sun {
  display: none;
}

html.dark .moon {
  display: inline;
}

.page-shell {
  max-width: 896px;
  margin: 0 auto;
  padding: 30px 16px 64px;
}

.form-card {
  display: flex;
  flex-direction: column;
  gap: 24px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  box-shadow: var(--shadow);
}

.card-header {
  display: flex;
  justify-content: space-between;
  padding: 24px 24px 0;
}

form {
  display: grid;
  gap: 34px;
  padding: 0 24px 24px;
}

.question-list {
  display: grid;
  gap: 34px;
}

.question-block {
  display: grid;
  gap: 16px;
}

.question-label {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
}

.textarea-wrap {
  display: grid;
  gap: 8px;
}

.char-count {
  color: var(--muted);
  font-size: 14px;
}

.option-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 4px;
  border-radius: 8px;
}

.option-button {
  min-height: 48px;
  padding: 12px 24px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--background);
  color: var(--foreground);
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  transition: background 160ms ease, border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.option-button.selected {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--primary-foreground);
  box-shadow: 0 0 0 3px var(--ring);
}

.option-row.invalid {
  box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.26);
}

textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--background);
  color: var(--foreground);
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

textarea {
  min-height: 128px;
  padding: 12px 14px;
  resize: vertical;
}

textarea:focus,
.option-row:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--ring);
}

textarea.invalid {
  border-color: var(--danger);
  box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.26);
}

.error-message {
  min-height: 22px;
  margin: -18px 0 0;
  color: var(--danger);
  font-size: 14px;
  font-weight: 600;
}

.submit-button {
  min-height: 52px;
  border: 0;
  border-radius: 8px;
  background: var(--primary);
  color: var(--primary-foreground);
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  transition: opacity 160ms ease, transform 160ms ease;
}

.submit-button:hover {
  opacity: 0.9;
}

.footer {
  border-top: 1px solid var(--border);
  background: var(--background);
}

.footer-shell {
  display: flex;
  align-items: end;
  justify-content: space-between;
  max-width: 1120px;
  margin: 0 auto;
  padding: 36px 24px;
  color: var(--muted);
  font-size: 14px;
}

.footer h2 {
  margin: 0 0 14px;
  color: var(--foreground);
  font-size: 18px;
}

.footer p {
  margin: 6px 0;
}

[dir="rtl"] {
  text-align: right;
}

[dir="rtl"] .nav-links {
  direction: ltr;
}

[dir="rtl"] .intro {
  text-align: center;
}

@media (max-width: 760px) {
  .nav-links {
    display: none;
  }

  .brand {
    max-width: calc(100vw - 86px);
    gap: 9px;
    font-size: 14px;
  }

  .brand-logo {
    width: 150px;
  }

  .page-shell {
    padding: 20px 12px;
  }

  .card-header,
  form {
    padding-left: 16px;
    padding-right: 16px;
  }

  .option-button {
    flex: 1 1 140px;
    padding-left: 16px;
    padding-right: 16px;
  }

  .footer-shell {
    display: grid;
    gap: 22px;
    padding: 30px 16px;
  }
}