:root {
  --color-paper: #f4f1e8;
  --color-paper-deep: #ece7d9;
  --color-ink: #1c1b18;
  --color-ink-soft: #6b665b;
  --color-line: #d9d3c3;
  --color-accent: #d8442a;
  --color-accent-deep: #b0331d;
  --color-mark: #e0a92e;
  --font-display: Inter, Noto Sans TC, sans-serif;
  --font-body: Inter, Noto Sans TC, sans-serif;
  --font-mono: Inter, Noto Sans TC, sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: #1c1b18;
  background-color: #f4f1e8;
  min-height: 100vh;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
}

[hidden] {
  display: none !important;
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

h1, h2, h3 {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-weight: 500;
  line-height: 1.1;
}

::selection {
  background: #d8442a;
  color: #f4f1e8;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 24px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #6b665b;
}

.tag-accent {
  color: #d8442a;
}

.badge {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border: 1px solid #d9d3c3;
  border-radius: 2px;
  color: #6b665b;
}
.badge.is-live {
  color: #d8442a;
  border-color: #d8442a;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.04em;
  padding: 8px 24px;
  border: 1.5px solid #1c1b18;
  border-radius: 2px;
  background: transparent;
  transition: background-color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.btn:hover {
  background: #1c1b18;
  color: #f4f1e8;
}
.btn.btn-accent {
  border-color: #d8442a;
  color: #d8442a;
}
.btn.btn-accent:hover {
  background: #d8442a;
  color: #f4f1e8;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #6b665b;
  transition: color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), gap 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.back-link:hover {
  color: #d8442a;
  gap: 16px;
}

.tool-head-actions {
  display: inline-flex;
  align-items: center;
  gap: 24px;
}

.share-btn {
  border: 0;
  background: none;
  cursor: pointer;
}

.dropzone {
  display: grid;
  place-items: center;
  gap: 16px;
  padding: 64px 24px;
  text-align: center;
  border: 1.5px dashed #d9d3c3;
  border-radius: 2px;
  background: #ece7d9;
  color: #6b665b;
  transition: border-color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), background-color 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.dropzone.is-dragover {
  border-color: #d8442a;
  background: color-mix(in srgb, #d8442a 8%, #ece7d9);
}

.dropzone-hint {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
}

.tool-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-block: 40px 24px;
  border-bottom: 1.5px solid #1c1b18;
}

.tool-head-title {
  font-size: 2.75rem;
}

.site-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 64px;
  padding-block: 24px;
  border-top: 1px solid #d9d3c3;
}

.site-foot-copy {
  font-family: "Inter", "Noto Sans TC", sans-serif;
  font-size: 1rem;
  color: #6b665b;
}

.section-rule {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-block: 40px 24px;
}
.section-rule::after {
  content: "";
  flex: 1;
  height: 1px;
  background: #d9d3c3;
}