/* Image Optimizer — premium UI */
:root {
  --bg: #0b0f17;
  --bg-2: #0f1422;
  --panel: #131a2a;
  --panel-2: #182135;
  --line: #233048;
  --text: #e7ecf5;
  --text-2: #aab4c8;
  --muted: #7d889f;
  --accent: #6aa3ff;
  --accent-2: #8bd8ff;
  --good: #5ed5a8;
  --warn: #f4b25b;
  --bad: #ff7575;
  --shadow: 0 12px 40px rgba(0,0,0,.45), 0 2px 8px rgba(0,0,0,.3);
  --radius: 14px;
  --radius-sm: 10px;
  --ease: cubic-bezier(.2,.7,.2,1);
}

* { box-sizing: border-box; }
html, body { background: radial-gradient(1200px 600px at 70% -10%, rgba(106,163,255,.12), transparent 60%), var(--bg); color: var(--text); }
body { margin: 0; font: 15px/1.55 Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: -9999px; top: -9999px; }
.skip-link:focus { left: 12px; top: 12px; z-index: 9999; background: var(--panel); color: var(--text); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 8px 16px; text-decoration: none; font-weight: 600; }

/* --- Topbar --------------------------------------------------------------- */
.topbar {
  display: flex; align-items: center; gap: 28px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(8,12,20,.75); backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 50;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; letter-spacing: .02em; }
.brand:hover { text-decoration: none; }
.brand-mark { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 8px; background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #0a1224; font-weight: 800; font-size: 13px; }
.topnav { display: flex; gap: 18px; }
.topnav a { color: var(--text-2); padding: 6px 4px; border-bottom: 2px solid transparent; }
.topnav a:hover { color: var(--text); text-decoration: none; }
.topnav a.is-active { color: var(--text); border-bottom-color: var(--accent); }

/* --- Layout --------------------------------------------------------------- */
.app { max-width: 1380px; margin: 0 auto; padding: 28px 24px 48px; }
.intro { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: end; margin-bottom: 22px; }
.kicker { color: var(--accent-2); text-transform: uppercase; letter-spacing: .14em; font-size: 12px; font-weight: 600; margin: 0 0 6px; }
.intro h1 { margin: 0 0 8px; font-size: clamp(28px, 4vw, 40px); line-height: 1.1; letter-spacing: -.02em; }
.lede { color: var(--text-2); margin: 0; max-width: 70ch; }
.intro-stats { list-style: none; padding: 0; margin: 0; display: grid; grid-auto-flow: column; gap: 10px; }
.intro-stats li { padding: 12px 16px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-sm); text-align: center; min-width: 110px; }
.intro-stats strong { display: block; font-size: 17px; color: var(--text); }
.intro-stats span { color: var(--muted); font-size: 12px; }

/* --- Workspace ------------------------------------------------------------ */
.workspace {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 320px;
  gap: 16px;
  margin-top: 8px;
}
.pane { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; display: flex; flex-direction: column; }
.pane-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; border-bottom: 1px solid var(--line); background: var(--panel-2); }
.pane-head h2 { margin: 0; font-size: 14px; letter-spacing: .04em; text-transform: uppercase; color: var(--text-2); }
.pill { display: inline-grid; place-items: center; min-width: 24px; height: 22px; padding: 0 8px; border-radius: 999px; background: var(--bg-2); color: var(--text-2); font-size: 12px; border: 1px solid var(--line); }

/* --- Tray (left) ---------------------------------------------------------- */
.pane-tray { min-height: 480px; }
.tray-actions { display: flex; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.tray { list-style: none; padding: 8px; margin: 0; overflow-y: auto; max-height: 60vh; }
.tray-item {
  display: grid; grid-template-columns: 56px 1fr auto; gap: 10px; align-items: center;
  padding: 8px; border-radius: 10px; cursor: pointer; border: 1px solid transparent;
  transition: background .15s var(--ease), border-color .15s var(--ease);
}
.tray-item:hover { background: var(--panel-2); }
.tray-item.is-selected { background: rgba(106,163,255,.1); border-color: rgba(106,163,255,.4); }
.tray-item .thumb { width: 56px; height: 56px; border-radius: 8px; overflow: hidden; background: #0b1322; border: 1px solid var(--line); }
.tray-item .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.tray-item .meta { min-width: 0; }
.tray-item .name { font-size: 13px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tray-item .sub { color: var(--muted); font-size: 11px; }
.tray-item .badge { display: inline-block; margin-top: 4px; padding: 2px 8px; font-size: 11px; border-radius: 999px; background: var(--bg-2); color: var(--text-2); border: 1px solid var(--line); }
.tray-item .badge-processing { color: #0a1224; background: var(--warn); border-color: transparent; }
.tray-item .badge-done { color: #052017; background: var(--good); border-color: transparent; }
.tray-item .badge-failed { color: #2a0707; background: var(--bad); border-color: transparent; }
.tray-item .x { background: transparent; color: var(--muted); border: 0; font-size: 18px; cursor: pointer; padding: 4px 8px; border-radius: 6px; }
.tray-item .x:hover { background: rgba(255,255,255,.06); color: var(--text); }
.tray-empty { text-align: center; color: var(--muted); padding: 40px 16px; }
.tray-empty .muted { color: var(--muted); font-size: 12px; margin-top: 4px; }

/* --- Editor (center) ------------------------------------------------------ */
.pane-editor { min-height: 560px; }
.editor-meta { color: var(--muted); font-size: 12px; }
.editor-stage { position: relative; flex: 1; min-height: 420px; background: #0a0f1a; }
.editor-empty { position: absolute; inset: 0; display: grid; place-items: center; gap: 12px; color: var(--muted); text-align: center; padding: 24px; }
.editor-empty svg { color: var(--muted); opacity: .8; }
[hidden] { display: none !important; }
#cropper_canvas { display: block; width: 100%; height: 100%; cursor: grab; touch-action: none; }
#cropper_canvas.is-picking { cursor: crosshair; }

/* Preview overlay (live output preview) */
.editor-preview { position: absolute; inset: 0; overflow: hidden; isolation: isolate; }
.preview-bg { position: absolute; inset: 0; background-color: var(--prev-bg, #0a0f1a); }
.editor-preview[data-bg="checker"] .preview-bg {
  background-color: #1a2233;
  background-image:
    linear-gradient(45deg, #2a3245 25%, transparent 25%),
    linear-gradient(-45deg, #2a3245 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #2a3245 75%),
    linear-gradient(-45deg, transparent 75%, #2a3245 75%);
  background-size: 18px 18px;
  background-position: 0 0, 0 9px, 9px -9px, -9px 0;
}
.editor-preview[data-bg="white"] .preview-bg { background-color: #ffffff; background-image: none; }
.editor-preview[data-bg="black"] .preview-bg { background-color: #000000; background-image: none; }
.editor-preview[data-bg="gray"]  .preview-bg { background-color: #808080; background-image: none; }
.editor-preview[data-bg="custom"] .preview-bg { background-image: none; }

.preview-img-wrap { position: absolute; inset: 0; display: grid; place-items: center; padding: 24px 24px 64px; }
#preview_img { max-width: 100%; max-height: 100%; object-fit: contain; box-shadow: 0 8px 30px rgba(0,0,0,.45); display: block; }
#preview_img:not([src]), #preview_img[src=""] { display: none; }

.preview-status {
  position: absolute; top: 12px; left: 12px;
  display: inline-flex; gap: 8px; align-items: center;
  background: rgba(11,15,23,.78); color: var(--text);
  padding: 6px 10px; border-radius: 999px; font-size: 12px;
  border: 1px solid var(--line); backdrop-filter: blur(6px);
}
.preview-status .spinner {
  width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,.25); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.preview-bgbar {
  position: absolute; left: 50%; bottom: 12px; transform: translateX(-50%);
  display: inline-flex; gap: 8px; align-items: center;
  background: rgba(11,15,23,.78); border: 1px solid var(--line);
  border-radius: 999px; padding: 6px 10px; backdrop-filter: blur(6px);
}
.preview-bgbar .ctrl-label { font-size: 11px; }
.bgsw {
  width: 22px; height: 22px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,.18); padding: 0; cursor: pointer;
  background: #0a0f1a; position: relative; overflow: hidden;
  display: inline-block;
}
.bgsw:hover { border-color: rgba(255,255,255,.45); }
.bgsw.is-on { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(106,163,255,.25); }
.bgsw-checker {
  background-color: #1a2233;
  background-image:
    linear-gradient(45deg, #2a3245 25%, transparent 25%),
    linear-gradient(-45deg, #2a3245 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #2a3245 75%),
    linear-gradient(-45deg, transparent 75%, #2a3245 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0;
}
.bgsw-white { background: #ffffff; }
.bgsw-black { background: #000000; }
.bgsw-gray  { background: #808080; }
.bgsw-custom { padding: 0; }
.bgsw-custom input[type="color"] {
  appearance: none; -webkit-appearance: none;
  width: 100%; height: 100%; border: 0; padding: 0; background: transparent; cursor: pointer;
}
.bgsw-custom input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.bgsw-custom input[type="color"]::-webkit-color-swatch { border: 0; border-radius: 50%; }

/* Switch (preview toggle) */
.switch { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch-track {
  width: 34px; height: 20px; border-radius: 999px;
  background: var(--bg-2); border: 1px solid var(--line);
  position: relative; transition: background .15s ease, border-color .15s ease;
}
.switch-thumb {
  position: absolute; top: 1px; left: 1px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #d6dde8; transition: transform .15s ease, background .15s ease;
}
.switch input:checked + .switch-track { background: rgba(106,163,255,.35); border-color: var(--accent); }
.switch input:checked + .switch-track .switch-thumb { transform: translateX(14px); background: var(--accent); }
.switch input:focus-visible + .switch-track { outline: 2px solid var(--accent); outline-offset: 2px; }
.switch-label { color: var(--text); font-size: 13px; font-weight: 600; }
.editor-controls { display: flex; gap: 12px; padding: 12px 16px; border-top: 1px solid var(--line); background: var(--panel-2); flex-wrap: wrap; align-items: center; justify-content: space-between; }
.control-group { display: flex; gap: 8px; align-items: center; }
.ctrl-label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; }

/* --- Inspector (right) ---------------------------------------------------- */
.pane-inspector { padding: 0; }
.field { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.field:last-of-type { border-bottom: 0; }
.field label, .field .field-label { display: block; color: var(--text-2); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px; }
.field .hint { color: var(--muted); font-size: 12px; margin: 6px 0 0; }
.field.group > summary { cursor: pointer; color: var(--text); font-weight: 600; padding: 2px 0; list-style: none; }
.field.group > summary::-webkit-details-marker { display: none; }
.field.group > summary::after { content: '+'; float: right; color: var(--muted); font-weight: 700; }
.field.group[open] > summary::after { content: '\2212'; }

.select, .num {
  width: 100%; padding: 10px 12px; background: var(--bg-2); color: var(--text);
  border: 1px solid var(--line); border-radius: 10px; font: inherit;
}
.select:focus, .num:focus, input:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.num { width: 88px; text-align: right; }

.quality-row { display: grid; grid-template-columns: 1fr 88px; gap: 10px; align-items: center; }
.quality-row input[type="range"] { width: 100%; }

.seg { display: flex; gap: 4px; padding: 4px; background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; }
.seg-btn { flex: 1; background: transparent; color: var(--text-2); border: 0; padding: 6px 8px; border-radius: 7px; font: inherit; cursor: pointer; font-size: 12px; }
.seg-btn:hover { color: var(--text); }
.seg-btn.is-on { background: var(--accent); color: #0a1224; }

.check { display: flex; align-items: center; gap: 8px; color: var(--text); text-transform: none; letter-spacing: 0; font-size: 13px; margin: 6px 0; }
.check.inline { margin: 0; }
.check input[type="checkbox"] { accent-color: var(--accent); width: 16px; height: 16px; }

.dim-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: 8px; align-items: center; margin-top: 8px; }
.dim-row label { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 12px; margin: 0; text-transform: none; letter-spacing: 0; }
.dim-row .num { width: 100%; }

.ck-row { display: grid; grid-template-columns: 40px auto 1fr; gap: 8px; align-items: center; margin-top: 8px; }
.ck-row input[type="color"] { width: 40px; height: 36px; padding: 0; background: transparent; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.ck-row label { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 12px; margin: 0; text-transform: none; letter-spacing: 0; }

.actions { padding: 16px; border-top: 1px solid var(--line); display: grid; gap: 10px; }

/* --- Buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  padding: 10px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--text); cursor: pointer; font: inherit; font-weight: 600;
  transition: transform .06s var(--ease), background .15s var(--ease), border-color .15s var(--ease);
}
.btn:hover { background: #1c2741; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-sm { padding: 7px 10px; font-size: 12px; }
.btn-lg { padding: 14px 16px; font-size: 15px; }
.btn-primary { background: linear-gradient(135deg, var(--accent), #4d8ef7); color: #0a1224; border-color: transparent; }
.btn-primary:hover { filter: brightness(1.05); background: linear-gradient(135deg, var(--accent), #4d8ef7); }
.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--panel-2); }

/* --- Drop overlay --------------------------------------------------------- */
.drop-overlay { position: fixed; inset: 0; background: rgba(8,12,20,.7); backdrop-filter: blur(6px); display: none; place-items: center; z-index: 100; pointer-events: none; }
.drop-overlay.is-on { display: grid; }
.drop-overlay-inner { display: grid; place-items: center; gap: 12px; padding: 36px 48px; border: 2px dashed var(--accent); border-radius: 18px; color: var(--text); background: rgba(11,15,23,.7); }
.drop-overlay-inner p { margin: 0; font-size: 18px; font-weight: 600; }

/* --- Results dock --------------------------------------------------------- */
.results { margin-top: 18px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.results-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--line); background: var(--panel-2); }
.results-head h2 { margin: 0; font-size: 16px; }
.results-head .muted { color: var(--muted); font-size: 12px; margin-top: 2px; }
.results-actions { display: flex; gap: 8px; }
.results-list { list-style: none; padding: 8px; margin: 0; display: grid; gap: 8px; }
.result-item { display: grid; grid-template-columns: 64px 1fr auto; gap: 14px; align-items: center; padding: 10px; border-radius: 10px; background: var(--panel-2); border: 1px solid var(--line); }
.result-item.is-failed { border-color: rgba(255,117,117,.4); background: rgba(255,117,117,.06); }
.result-item .thumb { width: 64px; height: 64px; border-radius: 8px; overflow: hidden; background: #0a1322; border: 1px solid var(--line); }
.result-item .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.result-item .name { font-weight: 600; }
.result-item .sub { color: var(--muted); font-size: 12px; }
.result-item .bars { display: flex; gap: 8px; align-items: center; margin-top: 4px; font-size: 12px; color: var(--text-2); }
.result-item .bar strong { color: var(--text); }
.result-item .arrow { color: var(--muted); }
.result-item .save { color: var(--good); font-weight: 700; margin-left: 6px; }

/* --- Footer --------------------------------------------------------------- */
.footer { text-align: center; color: var(--muted); padding: 28px 16px 40px; font-size: 12px; }

/* --- Responsive ----------------------------------------------------------- */
@media (max-width: 1100px) {
  .workspace { grid-template-columns: 240px 1fr; }
  .pane-inspector { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .topbar { padding: 12px 14px; gap: 14px; flex-wrap: wrap; }
  .topnav { gap: 12px; font-size: 14px; }
  .app { padding: 16px 12px 32px; }
  .intro { grid-template-columns: 1fr; }
  .intro-stats { grid-auto-flow: row; grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .intro-stats li { padding: 8px; min-width: 0; }
  .intro-stats strong { font-size: 14px; }
  .workspace { grid-template-columns: 1fr; }
  .pane-tray, .pane-editor, .pane-inspector { min-height: auto; }
  .editor-stage { min-height: 320px; }
  .tray { max-height: 220px; }
  .result-item { grid-template-columns: 52px 1fr; }
  .result-item .actions { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ── Rotate / Flip panel (inside inspector) ─────────────────────────────── */
#rt_opt_panel > summary::after { content: none; }
.rt-opt-chevron {
  flex-shrink: 0; transition: transform .15s ease;
  vertical-align: middle; margin-right: 4px;
  color: var(--muted);
}
details[open]#rt_opt_panel .rt-opt-chevron { transform: rotate(180deg); }
.rt-opt-caption {
  font-size: 11px; color: var(--muted); font-style: italic;
  margin: 4px 0 12px;
}
.rt-opt-hint {
  font-size: 11px; color: var(--muted); margin: 4px 0 0;
}