:root {
  --bg0: #0f1419;
  --bg1: #1a222c;
  --ink: #f4f1ea;
  --muted: #9aa7b5;
  --accent: #3d9a7a;
  --accent-2: #e8c07a;
  --line: rgba(244, 241, 234, 0.12);
  --danger: #e07a6a;
  --font-display: "Fraunces", "Songti SC", "Noto Serif SC", Georgia, serif;
  --font-body: "Source Sans 3", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(61, 154, 122, 0.22), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(232, 192, 122, 0.14), transparent 50%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 55%, #121820);
  line-height: 1.5;
}

a {
  color: var(--accent-2);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--ink);
}

.wrap {
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  padding: 1.25rem 0 0.5rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
}

.brand span {
  color: var(--accent);
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.nav a:hover {
  color: var(--ink);
}

.hero {
  padding: 2.5rem 0 1.5rem;
}

.hero h1 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.hero p {
  margin: 0;
  max-width: 36rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.tool {
  padding: 0.5rem 0 3rem;
}

.drop {
  position: relative;
  border: 1px dashed var(--line);
  background: rgba(255, 255, 255, 0.03);
  min-height: 220px;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.drop:hover,
.drop.is-drag {
  border-color: rgba(61, 154, 122, 0.65);
  background: rgba(61, 154, 122, 0.08);
}

.drop input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.drop-copy {
  text-align: center;
  pointer-events: none;
}

.drop-copy strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 0.35rem;
}

.drop-copy span {
  color: var(--muted);
  font-size: 0.95rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1rem 0;
}

.btn {
  appearance: none;
  border: 0;
  padding: 0.7rem 1.15rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  color: var(--bg0);
  background: var(--accent);
  transition: transform 0.15s ease, filter 0.15s ease, opacity 0.15s ease;
}

.btn:hover:not(:disabled) {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn--ghost:hover:not(:disabled) {
  border-color: rgba(244, 241, 234, 0.35);
  filter: none;
}

.status {
  min-height: 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

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

.preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.25rem;
}

@media (max-width: 720px) {
  .preview {
    grid-template-columns: 1fr;
  }
}

.pane {
  border-top: 1px solid var(--line);
  padding-top: 0.75rem;
}

.pane h2 {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.pane canvas,
.pane img {
  display: block;
  width: 100%;
  height: auto;
  background:
    linear-gradient(45deg, #ccc 25%, transparent 25%),
    linear-gradient(-45deg, #ccc 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #ccc 75%),
    linear-gradient(-45deg, transparent 75%, #ccc 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  background-color: #fff;
}

.site-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0.25rem 0;
}

.home-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.home-list li {
  border-top: 1px solid var(--line);
}

.home-list a {
  display: block;
  padding: 1.1rem 0;
  color: var(--ink);
  text-decoration: none;
}

.home-list a:hover {
  color: var(--accent-2);
}

.home-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin-bottom: 0.25rem;
}

.home-list span {
  color: var(--muted);
}