/* SliceView — Bringhurst-Inspired Design */

:root {
  --color-bg: #FFFEF9;
  --color-text: #2C2C2C;
  --color-text-muted: #6B6B6B;
  --color-border: #E0DED8;
  --color-accent: #8B7355;
  --font-serif: 'Crimson Pro', Georgia, 'Times New Roman', serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  --base-unit: 8px;
  --max-width: 720px;
}

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

html {
  font-size: 18px;
  line-height: 1.6;
}

body {
  font-family: var(--font-serif);
  background-color: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: calc(var(--base-unit) * 6) calc(var(--base-unit) * 3);
}

main {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  flex: 1;
}

/* Typography */

h1 {
  font-size: 2.5rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: calc(var(--base-unit) * 2);
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: calc(var(--base-unit) * 1.5);
}

.subtitle {
  color: var(--color-text-muted);
  font-style: italic;
  max-width: 540px;
}

header {
  margin-bottom: calc(var(--base-unit) * 6);
}

/* Horizontal Rules */

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: calc(var(--base-unit) * 4) 0;
}

/* Buttons */

button {
  font-family: var(--font-serif);
  font-size: 1rem;
  background: transparent;
  border: 1px solid var(--color-text);
  color: var(--color-text);
  padding: calc(var(--base-unit) * 1) calc(var(--base-unit) * 2.5);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

button:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
}

button:active {
  opacity: 0.8;
}

/* Drop Zone */

#drop-zone {
  border: 1px dashed var(--color-border);
  padding: calc(var(--base-unit) * 8) calc(var(--base-unit) * 4);
  text-align: center;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

#drop-zone.drag-over {
  border-color: var(--color-accent);
  background-color: rgba(139, 115, 85, 0.05);
}

#drop-zone p {
  color: var(--color-text-muted);
}

#drop-zone .or {
  font-style: italic;
  margin: calc(var(--base-unit) * 2) 0;
  font-size: 0.9rem;
}

#file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.file-label {
  display: inline-block;
  margin-top: calc(var(--base-unit) * 1);
  font-family: var(--font-serif);
  font-size: 1rem;
  background: transparent;
  border: 1px solid var(--color-text);
  color: var(--color-text);
  padding: calc(var(--base-unit) * 1) calc(var(--base-unit) * 2.5);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.file-label:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
}

/* Results Section */

#results-section {
  margin-top: calc(var(--base-unit) * 4);
}

#original-info,
#segments-info {
  margin-bottom: calc(var(--base-unit) * 2);
}

#original-dimensions,
#segments-summary {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

#download-all-btn {
  margin-top: calc(var(--base-unit) * 2);
}

/* Thumbnails Grid */

#thumbnails-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: calc(var(--base-unit) * 3);
  margin-top: calc(var(--base-unit) * 4);
}

.thumbnail-card {
  border: 1px solid var(--color-border);
  padding: calc(var(--base-unit) * 2);
}

.thumbnail-card img {
  width: 100%;
  height: 150px;
  object-fit: contain;
  background-color: #F5F4F0;
  margin-bottom: calc(var(--base-unit) * 1.5);
}

.thumbnail-card .info {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: calc(var(--base-unit) * 1.5);
}

.thumbnail-card button {
  font-size: 0.85rem;
  padding: calc(var(--base-unit) * 0.75) calc(var(--base-unit) * 1.5);
  width: 100%;
}

/* Reset Button */

#reset-btn {
  margin-top: calc(var(--base-unit) * 2);
}

/* Footer */

footer {
  margin-top: calc(var(--base-unit) * 8);
  text-align: center;
}

footer p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
}

footer .author {
  margin-top: calc(var(--base-unit) * 2);
  font-style: normal;
  font-size: 0.8rem;
}

footer .author a {
  color: #A8A8A0;
  text-decoration: none;
}

footer .author a:hover {
  color: var(--color-text-muted);
}

/* Hidden utility */

[hidden] {
  display: none !important;
}

/* Responsive */

@media (max-width: 600px) {
  html {
    font-size: 16px;
  }

  body {
    padding: calc(var(--base-unit) * 4) calc(var(--base-unit) * 2);
  }

  h1 {
    font-size: 2rem;
  }

  #drop-zone {
    padding: calc(var(--base-unit) * 5) calc(var(--base-unit) * 2);
  }

  #thumbnails-grid {
    grid-template-columns: 1fr;
  }
}