:root {
  --background: #fafaf8;
  --foreground: #1a1a1a;
  --muted: #f5f3f0;
  --muted-foreground: #6b6b6b;
  --accent: #b8860b;
  --accent-secondary: #d4a84b;
  --accent-foreground: #ffffff;
  --border: #e8e4df;
  --card: #ffffff;
  --ring: #b8860b;
  --success: #0d7a2b;
  --danger: #b42318;

  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(26, 26, 26, 0.04);
  --shadow-md: 0 12px 36px rgba(26, 26, 26, 0.08);
  --shadow-lg: 0 26px 72px rgba(26, 26, 26, 0.12);

  --font-display: "Noto Serif SC", "Playfair Display", Georgia, serif;
  --font-body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "Consolas", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--foreground);
  background:
    radial-gradient(circle at top left, rgba(184, 134, 11, 0.12), transparent 34%),
    radial-gradient(circle at right center, rgba(212, 168, 67, 0.08), transparent 24%),
    var(--background);
  line-height: 1.75;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(26, 26, 26, 0.03) 0.5px, transparent 0.5px);
  background-size: 4px 4px;
  opacity: 0.24;
  z-index: -1;
}

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

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

.download-page {
  padding: 28px 18px 40px;
}

.download-shell {
  width: min(100%, 1180px);
  margin: 0 auto;
}

.download-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.download-back,
.download-top-link,
.download-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: border-color 200ms ease, background-color 200ms ease, color 200ms ease, transform 200ms ease;
}

.download-back,
.download-top-link {
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border) 70%);
  background: color-mix(in srgb, var(--card) 94%, var(--muted) 6%);
  color: color-mix(in srgb, var(--accent) 84%, var(--foreground) 16%);
  box-shadow: var(--shadow-sm);
}

.download-back:hover,
.download-top-link:hover {
  border-color: color-mix(in srgb, var(--accent) 58%, var(--border) 42%);
  background: color-mix(in srgb, var(--accent) 10%, var(--card) 90%);
  transform: translateY(-1px);
}

.download-top-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.download-layout {
  display: grid;
  grid-template-columns: minmax(320px, 430px) minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.download-card,
.preview-panel {
  border: 1px solid var(--border);
  border-radius: 32px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--card) 96%, white 4%), color-mix(in srgb, var(--muted) 84%, var(--card) 16%)),
    radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 12%, transparent), transparent 46%);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.download-card::before,
.preview-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 26px;
  right: 26px;
  height: 4px;
  border-radius: 0 0 999px 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary), var(--accent));
}

.download-card-inner,
.preview-panel-inner {
  position: relative;
  z-index: 1;
  padding: 34px 36px 30px;
}

.download-kicker,
.preview-kicker {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.download-title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.6rem + 1vw, 2.7rem);
  line-height: 1.15;
  font-weight: 600;
  color: #1a2332;
}

.download-subtitle {
  margin: 14px 0 0;
  color: var(--muted-foreground);
  font-size: 1.04rem;
  line-height: 1.8;
}

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.download-meta li {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 12px;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--border) 72%);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--accent) 8%, var(--card) 92%);
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--accent) 86%, var(--foreground) 14%);
}

.download-alert {
  margin: 22px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: color-mix(in srgb, #fff5e6 76%, var(--card) 24%);
  color: color-mix(in srgb, var(--foreground) 82%, var(--muted-foreground) 18%);
  font-size: 0.98rem;
  line-height: 1.75;
}

.download-form {
  margin-top: 22px;
}

.download-label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--accent) 82%, var(--foreground) 18%);
}

.download-input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.download-input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: color-mix(in srgb, var(--card) 92%, white 8%);
  color: var(--foreground);
  padding: 10px 14px;
  font-size: 0.96rem;
  transition: border-color 200ms ease, box-shadow 200ms ease, background-color 200ms ease;
}

.download-input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--card);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}

.download-verify {
  width: 100%;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--border) 60%);
  background: color-mix(in srgb, var(--accent) 12%, var(--card) 88%);
  color: color-mix(in srgb, var(--accent) 88%, var(--foreground) 12%);
}

.download-verify:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 18%, var(--card) 82%);
}

.download-feedback {
  margin: 10px 0 0;
  min-height: 1.7em;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--muted-foreground);
}

.download-feedback.is-error {
  color: var(--danger);
}

.download-feedback.is-success {
  color: var(--success);
}

.download-button {
  width: 100%;
  margin-top: 12px;
  border: 1px solid color-mix(in srgb, var(--accent) 38%, var(--border) 62%);
  background: color-mix(in srgb, var(--accent) 12%, var(--card) 88%);
  color: color-mix(in srgb, var(--accent) 88%, var(--foreground) 12%);
  box-shadow: var(--shadow-sm);
}

.download-button:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 18%, var(--card) 82%);
  text-decoration: none;
}

.download-button.is-disabled {
  opacity: 0.58;
  cursor: not-allowed;
}

.download-footnote {
  margin: 14px 0 0;
  color: var(--muted-foreground);
  font-size: 0.86rem;
  line-height: 1.7;
}

.preview-panel {
  min-height: 100%;
}

.preview-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 1.4rem + 0.7vw, 2.2rem);
  line-height: 1.2;
  color: #1a2332;
}

.preview-copy {
  margin: 12px 0 0;
  color: var(--muted-foreground);
  font-size: 1rem;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.preview-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: color-mix(in srgb, var(--card) 88%, white 12%);
  box-shadow: var(--shadow-md);
}

.preview-card img {
  display: block;
  width: 100%;
  height: auto;
  background: color-mix(in srgb, var(--muted) 76%, white 24%);
}

.preview-card figcaption {
  padding: 10px 14px 12px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

@media (max-width: 980px) {
  .download-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .download-page {
    padding: 18px 12px 28px;
  }

  .download-topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .download-top-actions {
    display: grid;
  }

  .download-back,
  .download-top-link {
    width: 100%;
  }

  .download-card,
  .preview-panel {
    border-radius: 24px;
  }

  .download-card-inner,
  .preview-panel-inner {
    padding: 26px 18px 22px;
  }

  .preview-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}