:root {
  /* Accent fallbacks (overridden by theme.css when it loads) */
  --accent: #2a737e;
  --accent-hover: #235f69;
  --accent-soft: #e2eef0;
  --accent-2: #4f9aa6;
  --accent-rgb: 42, 115, 126;
  --accent-border: #c2dbdf;

  /* Local semantic tokens */
  --bg: #f7f9fa;
  --surface: #ffffff;
  --text: #1a2226;
  --muted: #5c6b70;
  --border: #dde3e5;
  --error: #b3261e;
  --error-soft: #fbe9e7;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 4px 12px rgba(0, 0, 0, 0.04);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181a;
    --surface: #1d2326;
    --text: #e9edef;
    --muted: #9aa7ab;
    --border: #2c3437;
    --error: #ff8a80;
    --error-soft: #3a201e;
    --accent-soft: rgba(var(--accent-rgb), 0.18);
    --accent-border: rgba(var(--accent-rgb), 0.4);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 12px rgba(0, 0, 0, 0.24);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
}

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

.site-header,
.site-footer {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.site-footer {
  border-bottom: none;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.site-header .wrap,
.site-footer .wrap,
main {
  max-width: 760px;
  margin: 0 auto;
  width: 100%;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--text);
}

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

.header-link {
  font-size: 0.9rem;
  text-decoration: none;
  font-weight: 500;
}

main {
  padding: 2rem 1.25rem 3rem;
  flex: 1;
}

.intro h1 {
  font-size: 1.9rem;
  margin: 0 0 0.5rem;
}

.intro p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 60ch;
}

.dropzone {
  margin-top: 1.5rem;
  border: 2px dashed var(--accent-border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.dropzone:hover,
.dropzone:focus-visible {
  border-color: var(--accent);
}

.dropzone.dragover {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.dropzone p {
  margin: 0.25rem 0;
  color: var(--muted);
}

.dropzone .dz-title {
  color: var(--text);
  font-weight: 600;
  font-size: 1.05rem;
}

.btn {
  display: inline-block;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.65rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-primary:disabled {
  background: var(--muted);
  cursor: not-allowed;
  opacity: 0.6;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent-border);
  background: var(--accent-soft);
}

.btn-small {
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
}

.file-input-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.results-section {
  margin-top: 2.5rem;
}

.results-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.results-status {
  color: var(--muted);
  font-size: 0.9rem;
}

.results-actions {
  display: flex;
  gap: 0.6rem;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.result-card.is-error {
  border-color: var(--error);
  background: var(--error-soft);
}

.thumb-wrap {
  border-radius: var(--radius-sm);
  overflow: hidden;
  background-image: linear-gradient(45deg, rgba(128, 128, 128, 0.2) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(128, 128, 128, 0.2) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(128, 128, 128, 0.2) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(128, 128, 128, 0.2) 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.thumb-wrap img {
  max-width: 100%;
  max-height: 100%;
  display: block;
}

.result-name {
  font-size: 0.9rem;
  font-weight: 600;
  word-break: break-all;
}

.result-sizes {
  font-size: 0.85rem;
  color: var(--muted);
}

.result-error-msg {
  font-size: 0.85rem;
  color: var(--error);
}

.faq {
  margin-top: 3rem;
}

.faq h2 {
  font-size: 1.3rem;
}

.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin-bottom: 0.6rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq p {
  color: var(--muted);
  margin-bottom: 0;
}

.site-footer {
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  align-items: center;
  justify-content: space-between;
}

.footer-links a {
  margin-right: 1rem;
}

.hidden {
  display: none !important;
}

@media (max-width: 480px) {
  .intro h1 {
    font-size: 1.6rem;
  }
  .dropzone {
    padding: 2rem 1rem;
  }
  .results-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
}