/* ==========================================================================
   Background Remover — CIO Factory / orient-luxury design system
   Near-black base + grain texture, gold accent stack, dark-default with
   parchment light mode toggle. Portable --ol- token prefix.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@500;600;700&family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;1,500&family=Syne:wght@600;700;800&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  --ol-bg: #09080b;
  --ol-bg-raised: #121116;
  --ol-bg-card: #17151b;
  --ol-border: rgba(201, 168, 76, 0.18);
  --ol-border-strong: rgba(201, 168, 76, 0.36);
  --ol-gold: #c9a84c;
  --ol-gold-soft: rgba(201, 168, 76, 0.55);
  --ol-gold-dim: rgba(201, 168, 76, 0.12);
  --ol-text: #ece7da;
  --ol-text-dim: #a29c8f;
  --ol-text-faint: #6f6a60;
  --ol-danger: #c9645a;
  --ol-success: #7fae7a;
  --ol-shadow: rgba(0, 0, 0, 0.5);

  --ol-font-display: 'Cinzel', serif;
  --ol-font-body: 'Cormorant Garamond', serif;
  --ol-font-ui: 'Syne', sans-serif;
  --ol-font-mono: 'IBM Plex Mono', monospace;

  --ol-radius: 3px;
  --ol-transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

html[data-theme='light'] {
  --ol-bg: #f0ebe0;
  --ol-bg-raised: #e8e1d2;
  --ol-bg-card: #ffffff;
  --ol-border: rgba(138, 104, 32, 0.22);
  --ol-border-strong: rgba(138, 104, 32, 0.4);
  --ol-gold: #8a6820;
  --ol-gold-soft: rgba(138, 104, 32, 0.55);
  --ol-gold-dim: rgba(138, 104, 32, 0.1);
  --ol-text: #2a251c;
  --ol-text-dim: #665f4f;
  --ol-text-faint: #948c78;
  --ol-shadow: rgba(60, 50, 30, 0.18);
}

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

body {
  background: var(--ol-bg);
  color: var(--ol-text);
  font-family: var(--ol-font-body);
  font-size: 18px;
  line-height: 1.5;
  min-height: 100vh;
  position: relative;
  transition: background var(--ol-transition), color var(--ol-transition);
}

/* Grain texture overlay */
.ol-grain {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.5;
  mix-blend-mode: soft-light;
}
html[data-theme='light'] .ol-grain { opacity: 0.28; }

.ol-toast {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 1000;
  background: var(--ol-bg-card);
  border: 1px solid var(--ol-border-strong);
  color: var(--ol-text);
  padding: 12px 18px;
  border-radius: var(--ol-radius);
  font-family: var(--ol-font-ui);
  font-size: 13px;
  letter-spacing: 0.03em;
  box-shadow: 0 8px 24px var(--ol-shadow);
  transform: translateY(-12px);
  opacity: 0;
  transition: transform var(--ol-transition), opacity var(--ol-transition);
}
.ol-toast.show { transform: translateY(0); opacity: 1; }
.ol-toast.error { border-color: var(--ol-danger); }

/* ---- Layout ---- */
.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  position: relative;
  z-index: 1;
}

header.top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 40px;
  gap: 16px;
}

.brand h1 {
  font-family: var(--ol-font-display);
  font-weight: 600;
  font-size: 30px;
  letter-spacing: 0.04em;
  margin: 0 0 6px;
  color: var(--ol-text);
}
.brand .tagline {
  font-family: var(--ol-font-ui);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ol-gold);
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--ol-border-strong);
  color: var(--ol-text);
  font-family: var(--ol-font-ui);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 10px 16px;
  border-radius: var(--ol-radius);
  cursor: pointer;
  transition: border-color var(--ol-transition), background var(--ol-transition);
  white-space: nowrap;
}
.theme-toggle:hover { border-color: var(--ol-gold); background: var(--ol-gold-dim); }

/* ---- Output mode toggle ---- */
.mode-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
  flex-wrap: wrap;
}
.mode-label {
  font-family: var(--ol-font-ui);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ol-text-dim);
}
.mode-toggle {
  display: inline-flex;
  border: 1px solid var(--ol-border);
  border-radius: var(--ol-radius);
  overflow: hidden;
}
.mode-btn {
  font-family: var(--ol-font-ui);
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 9px 16px;
  background: transparent;
  border: none;
  color: var(--ol-text-dim);
  cursor: pointer;
  transition: background var(--ol-transition), color var(--ol-transition);
}
.mode-btn + .mode-btn { border-left: 1px solid var(--ol-border); }
.mode-btn:hover { color: var(--ol-text); }
.mode-btn.active {
  background: var(--ol-gold);
  color: var(--ol-bg);
}

/* ---- Link result panel ---- */
.link-panel {
  display: none;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  padding: 14px 16px;
  background: var(--ol-bg-card);
  border: 1px solid var(--ol-border-strong);
  border-radius: var(--ol-radius);
}
.link-panel.show { display: flex; }
.link-label {
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ol-gold);
  white-space: nowrap;
}
.link-panel input[type="text"] {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  color: var(--ol-text-dim);
  font-family: var(--ol-font-mono);
  font-size: 12px;
  outline: none;
}

/* ---- Dropzone ---- */
.dropzone {
  border: 1px dashed var(--ol-border-strong);
  border-radius: var(--ol-radius);
  background: var(--ol-bg-card);
  padding: 56px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--ol-transition), background var(--ol-transition);
  position: relative;
}
.dropzone:hover, .dropzone.dragover {
  border-color: var(--ol-gold);
  background: var(--ol-gold-dim);
}
.dropzone .dz-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 16px;
  color: var(--ol-gold);
}
.dropzone .dz-title {
  font-family: var(--ol-font-ui);
  font-size: 15px;
  letter-spacing: 0.03em;
  color: var(--ol-text);
  margin-bottom: 6px;
}
.dropzone .dz-sub {
  font-family: var(--ol-font-mono);
  font-size: 12px;
  color: var(--ol-text-faint);
}
.dropzone input[type="file"] { display: none; }

.url-row {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}
.url-row input[type="text"] {
  flex: 1;
  background: var(--ol-bg-card);
  border: 1px solid var(--ol-border);
  color: var(--ol-text);
  font-family: var(--ol-font-mono);
  font-size: 13px;
  padding: 12px 14px;
  border-radius: var(--ol-radius);
  outline: none;
  transition: border-color var(--ol-transition);
}
.url-row input[type="text"]:focus { border-color: var(--ol-gold); }
.url-row input[type="text"]::placeholder { color: var(--ol-text-faint); }

.btn {
  font-family: var(--ol-font-ui);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 20px;
  border-radius: var(--ol-radius);
  border: 1px solid var(--ol-gold-soft);
  background: var(--ol-gold-dim);
  color: var(--ol-gold);
  cursor: pointer;
  transition: background var(--ol-transition), color var(--ol-transition);
  white-space: nowrap;
}
.btn:hover:not(:disabled) { background: var(--ol-gold); color: var(--ol-bg); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn.primary { background: var(--ol-gold); color: var(--ol-bg); }
.btn.primary:hover:not(:disabled) { background: var(--ol-gold-soft); }
.btn.ghost { background: transparent; color: var(--ol-text-dim); border-color: var(--ol-border); }
.btn.ghost:hover:not(:disabled) { border-color: var(--ol-gold); color: var(--ol-gold); background: transparent; }

/* ---- Status / processing ---- */
.status-panel {
  margin-top: 28px;
  padding: 20px 22px;
  background: var(--ol-bg-card);
  border: 1px solid var(--ol-border);
  border-radius: var(--ol-radius);
  display: none;
}
.status-panel.show { display: flex; align-items: center; gap: 14px; }
.status-panel.err { border-color: var(--ol-danger); }
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--ol-border-strong);
  border-top-color: var(--ol-gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }
.status-text {
  font-family: var(--ol-font-ui);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ol-text-dim);
}
.status-panel.err .status-text { color: var(--ol-danger); }

/* ---- Signature element: before/after reveal slider ---- */
.result-section {
  margin-top: 36px;
  display: none;
}
.result-section.show { display: block; }

.result-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 10px;
}
.result-header h2 {
  font-family: var(--ol-font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin: 0;
}
.result-actions { display: flex; gap: 10px; }

.checker-bg {
  background-image:
    linear-gradient(45deg, #3a3a3a 25%, transparent 25%),
    linear-gradient(-45deg, #3a3a3a 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #3a3a3a 75%),
    linear-gradient(-45deg, transparent 75%, #3a3a3a 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  background-color: #4a4a4a;
}

.reveal {
  position: relative;
  width: 100%;
  max-height: 640px;
  overflow: hidden;
  border-radius: var(--ol-radius);
  border: 1px solid var(--ol-border-strong);
  user-select: none;
  background: #1a1a1a;
}
.reveal img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 640px;
  object-fit: contain;
  pointer-events: none;
}
.reveal .layer-before {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.reveal .layer-before img {
  position: absolute;
  top: 0;
  left: 0;
  width: var(--reveal-img-w, 100%);
  height: 100%;
}
.reveal .layer-after {
  position: relative;
}
.reveal .divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--ol-gold);
  cursor: ew-resize;
  box-shadow: 0 0 8px rgba(201, 168, 76, 0.6);
}
.reveal .handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--ol-gold);
  color: var(--ol-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: ew-resize;
  box-shadow: 0 4px 14px var(--ol-shadow);
}
.reveal .handle svg { width: 16px; height: 16px; }
.reveal .tag {
  position: absolute;
  top: 12px;
  font-family: var(--ol-font-ui);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(0, 0, 0, 0.55);
  padding: 5px 10px;
  border-radius: 2px;
  pointer-events: none;
}
.reveal .tag.tag-before { left: 12px; }
.reveal .tag.tag-after { right: 12px; }

/* ---- Session history ---- */
.history {
  margin-top: 48px;
}
.history h3 {
  font-family: var(--ol-font-ui);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ol-text-dim);
  margin: 0 0 14px;
}
.history-empty {
  font-family: var(--ol-font-body);
  font-style: italic;
  color: var(--ol-text-faint);
  font-size: 15px;
}
.history-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
  gap: 12px;
}
.history-item {
  aspect-ratio: 1 / 1;
  border-radius: var(--ol-radius);
  border: 1px solid var(--ol-border);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  transition: border-color var(--ol-transition);
}
.history-item:hover { border-color: var(--ol-gold); }
.history-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* ---- Footer ---- */
footer.foot {
  margin-top: 64px;
  text-align: center;
  font-family: var(--ol-font-mono);
  font-size: 11px;
  color: var(--ol-text-faint);
  letter-spacing: 0.04em;
}

@media (max-width: 640px) {
  .wrap { padding: 28px 16px 60px; }
  .brand h1 { font-size: 24px; }
  header.top { flex-direction: column; }
  .url-row { flex-direction: column; }
}