:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --border: #262a33;
  --text: #e6e8ec;
  --muted: #8a93a0;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --good: #86efac;
  --warn: #fbbf24;
  --bad: #fca5a5;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fa;
    --panel: #ffffff;
    --panel-2: #f1f3f7;
    --border: #e3e6eb;
    --text: #1a1d22;
    --muted: #5b6270;
    --accent: #0369a1;
    --accent-strong: #0284c7;
    --good: #15803d;
    --warn: #b45309;
    --bad: #b91c1c;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

header {
  padding: 48px 0 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

header h1 {
  font-size: 28px;
  margin: 0;
  letter-spacing: -0.01em;
  font-weight: 600;
}

.privacy-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(125, 211, 252, 0.1);
  color: var(--accent);
  border: 1px solid rgba(125, 211, 252, 0.3);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.privacy-pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

header p {
  margin: 0;
  color: var(--muted);
  max-width: 620px;
}

.drop {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 56px 24px;
  text-align: center;
  transition: border-color 0.15s, background 0.15s;
  cursor: pointer;
  background: var(--panel);
}

.drop:hover,
.drop:focus-visible,
.drop.active {
  border-color: var(--accent-strong);
  background: var(--panel-2);
  outline: none;
}

.drop-inner svg {
  color: var(--muted);
  margin-bottom: 12px;
}

.drop-inner p {
  margin: 6px 0;
}

.drop-inner .hint {
  color: var(--muted);
  font-size: 13px;
}

.link {
  background: none;
  border: none;
  color: var(--accent);
  font: inherit;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.settings {
  margin-top: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
}

.row {
  display: flex;
  gap: 16px;
  align-items: flex-end;
  flex-wrap: wrap;
}

.row + .row {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.row label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
  min-width: 120px;
  flex: 1;
}

input[type=number], input[type=text], select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 10px;
  font-size: 14px;
  font-family: inherit;
  width: 100%;
}

input[type=range] {
  width: 100%;
  accent-color: var(--accent-strong);
}

#qualityLabel {
  color: var(--text);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.actions {
  justify-content: flex-end;
}

.summary {
  flex: 1;
  font-size: 13px;
  color: var(--muted);
  min-width: 200px;
}

.summary strong {
  color: var(--text);
  font-weight: 600;
}

.summary .saved {
  color: var(--good);
}

button {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 14px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

button:hover:not(:disabled) {
  border-color: var(--accent-strong);
  color: var(--accent);
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

button.ghost {
  color: var(--muted);
}

.files {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.file {
  display: grid;
  grid-template-columns: 56px 1fr auto auto;
  gap: 16px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  transition: border-color 0.15s;
}

.file:hover {
  border-color: var(--border);
}

.file .thumb {
  width: 56px;
  height: 56px;
  border-radius: 6px;
  object-fit: cover;
  background: var(--panel-2);
  cursor: pointer;
}

.file .meta {
  min-width: 0;
}

.file .name {
  font-size: 14px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file .stats {
  font-size: 12px;
  color: var(--muted);
  margin-top: 3px;
  font-variant-numeric: tabular-nums;
}

.file .stats .arrow { margin: 0 4px; color: var(--border); }
.file .stats .saved { color: var(--good); margin-left: 8px; }
.file .stats .grew { color: var(--warn); margin-left: 8px; }
.file .stats.error { color: var(--bad); }

.file .savings {
  font-size: 20px;
  font-weight: 600;
  color: var(--good);
  font-variant-numeric: tabular-nums;
  min-width: 60px;
  text-align: right;
}

.file .savings.grew { color: var(--warn); }
.file .savings.pending { color: var(--muted); font-weight: 400; font-size: 13px; }

.file .file-actions {
  display: flex;
  gap: 6px;
}

.file .icon-btn {
  padding: 6px 10px;
  font-size: 12px;
}

/* Dialog for before/after compare */
dialog {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 12px;
  padding: 0;
  max-width: 90vw;
  max-height: 90vh;
  width: 900px;
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.dialog-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.dialog-head button {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 22px;
  line-height: 1;
  padding: 0 8px;
  cursor: pointer;
}

.compare {
  position: relative;
  overflow: hidden;
  user-select: none;
  background: var(--panel-2);
}

.compare img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 70vh;
  object-fit: contain;
}

.compare img.after {
  position: absolute;
  inset: 0;
  clip-path: inset(0 0 0 50%);
}

.compare-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--accent);
  cursor: ew-resize;
  transform: translateX(-50%);
}

.compare-handle span {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--accent);
  color: var(--bg);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.compare-handle span::before {
  content: "⇔";
  font-weight: bold;
}

.compare-label {
  position: absolute;
  bottom: 12px;
  padding: 3px 10px;
  background: rgba(0, 0, 0, 0.6);
  color: white;
  border-radius: 4px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  pointer-events: none;
}

.compare-label.left { left: 12px; }
.compare-label.right { right: 12px; }

footer {
  color: var(--muted);
  font-size: 13px;
  padding: 32px 0 48px;
  margin-top: 40px;
  border-top: 1px solid var(--border);
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

footer a:hover { text-decoration: underline; }

@media (max-width: 640px) {
  .file {
    grid-template-columns: 48px 1fr;
    gap: 12px;
  }
  .file .savings,
  .file .file-actions {
    grid-column: 2;
  }
  .file .savings { text-align: left; margin-top: 4px; }
  .row label { min-width: 100%; }
  .actions { justify-content: stretch; }
  .actions button { flex: 1; }
}