/* =====================================================
   Theme tokens
   ===================================================== */
:root,
[data-theme="dark-gold"] {
  --bg: #15171c;
  --panel: #12141a;
  --panel-2: #1b1d22;
  --panel-3: #21242c;
  --border: #2a2d35;
  --border-strong: #343744;
  --text: #e6e6e6;
  --text-dim: #9aa0b0;
  --text-faint: #6b6e78;
  --accent: #f0c350;
  --accent-strong: #ffd76a;
  --accent-text: #1a1a1a;
  --button: #272a33;
  --button-hover: #30343f;
  --shadow: 0 12px 36px rgba(0,0,0,.55);
  --shadow-soft: 0 4px 14px rgba(0,0,0,.35);
  --shadow-tiny: 0 1px 2px rgba(0,0,0,.4);
  --error: #ff6b6b;
  --checker: #2a2a2a;
  color-scheme: dark;
}
[data-theme="light"] {
  --bg: #f3f4f7;
  --panel: #ffffff;
  --panel-2: #ffffff;
  --panel-3: #f8f9fb;
  --border: #e3e5ea;
  --border-strong: #d0d3da;
  --text: #1a1c20;
  --text-dim: #5d6470;
  --text-faint: #9aa0b0;
  --accent: #c8a000;
  --accent-strong: #b08c00;
  --accent-text: #ffffff;
  --button: #f0f1f4;
  --button-hover: #e6e8ed;
  --shadow: 0 12px 36px rgba(20,30,50,.10);
  --shadow-soft: 0 4px 14px rgba(20,30,50,.06);
  --shadow-tiny: 0 1px 2px rgba(20,30,50,.08);
  --error: #d33030;
  --checker: #d8d8dc;
  color-scheme: light;
}
[data-theme="cyberpunk"] {
  --bg: #0a0014;
  --panel: #14001f;
  --panel-2: #1a0028;
  --panel-3: #220033;
  --border: #2d0044;
  --border-strong: #4d0070;
  --text: #efe6ff;
  --text-dim: #b89cd8;
  --text-faint: #806890;
  --accent: #ff2eea;
  --accent-strong: #ff66ff;
  --accent-text: #0a0014;
  --button: #200035;
  --button-hover: #2e004a;
  --shadow: 0 12px 36px rgba(255,0,200,.18);
  --shadow-soft: 0 4px 18px rgba(255,0,200,.22);
  --shadow-tiny: 0 0 4px rgba(255,0,200,.4);
  --error: #ff4080;
  --checker: #220038;
  color-scheme: dark;
}
[data-theme="forest"] {
  --bg: #182520;
  --panel: #0e1c14;
  --panel-2: #15241b;
  --panel-3: #1c2e23;
  --border: #2a4030;
  --border-strong: #3a5040;
  --text: #e8f0e8;
  --text-dim: #9eb8a4;
  --text-faint: #6e8474;
  --accent: #7fc97f;
  --accent-strong: #95d695;
  --accent-text: #0e1c14;
  --button: #1f3025;
  --button-hover: #2a3d30;
  --shadow: 0 12px 36px rgba(0,30,10,.45);
  --shadow-soft: 0 4px 14px rgba(0,30,10,.30);
  --shadow-tiny: 0 1px 2px rgba(0,30,10,.4);
  --error: #ff7070;
  --checker: #243a2c;
  color-scheme: dark;
}

/* =====================================================
   Base
   ===================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", sans-serif;
}
html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  user-select: none;
  overflow: hidden;
  transition: background 0.25s ease, color 0.25s ease;
}

#app {
  display: grid;
  grid-template-columns: 74px 1fr 340px;
  grid-template-rows: 76px 1fr;
  height: 100vh;
  transition: grid-template-columns 0.25s ease;
  position: relative;
}
#app.sidebar-collapsed { grid-template-columns: 0 1fr 340px; }
#app.right-collapsed { grid-template-columns: 74px 1fr 0; }
#app.sidebar-collapsed.right-collapsed { grid-template-columns: 0 1fr 0; }

/* =====================================================
   Top bar
   ===================================================== */
#topbar {
  grid-column: 1 / span 3;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 50;
}
.brand {
  font-weight: 700;
  font-size: 16px;
  color: var(--accent);
  letter-spacing: .4px;
  margin-right: 8px;
}
.group {
  display: flex;
  gap: 4px;
  height: 100%;
  align-items: center;
}
.group + .group {
  padding-left: 12px;
  margin-left: 4px;
  border-left: 1px solid var(--border);
}
.group-end {
  margin-left: auto;
  padding-left: 0;
  border-left: none;
}

button {
  background: var(--button);
  color: var(--text);
  border: 1px solid transparent;
  padding: 7px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.15s ease, transform 0.05s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
button:hover { background: var(--button-hover); }
button:active { transform: translateY(1px); }
button.primary { background: var(--accent); color: var(--accent-text); font-weight: 600; }
button.primary:hover { background: var(--accent-strong); }
button.icon-btn {
  width: 36px; height: 36px; padding: 0;
  display: flex; align-items: center; justify-content: center;
}

.topbtn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  padding: 6px 10px 4px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-width: 58px;
  height: 56px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.topbtn svg { width: 20px; height: 20px; flex-shrink: 0; }
.topbtn span {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  line-height: 1;
  white-space: nowrap;
}
.topbtn:hover { background: var(--button-hover); color: var(--text); }
.topbtn.active { background: var(--accent); color: var(--accent-text); }

/* =====================================================
   Sidebar
   ===================================================== */
#sidebar {
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 8px;
  align-items: center;
  overflow: hidden;
  transition: padding 0.25s ease;
}
#app.sidebar-collapsed #sidebar { padding: 12px 0; border-right: none; }
#sidebar .tool {
  width: 52px;
  height: 56px;
  padding: 6px 0 4px;
  background: transparent;
  border-radius: 10px;
  color: var(--text-dim);
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
  flex-shrink: 0;
}
#sidebar .tool svg { width: 20px; height: 20px; flex-shrink: 0; }
#sidebar .tool span {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  line-height: 1;
}
#sidebar .tool:hover { background: var(--button-hover); color: var(--text); }
#sidebar .tool.active {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
  box-shadow: var(--shadow-tiny);
}

/* =====================================================
   Panel toggles
   ===================================================== */
.panel-toggle {
  position: absolute;
  width: 22px;
  height: 56px;
  padding: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0 8px 8px 0;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 30;
  top: 50%;
  transform: translateY(-50%);
  transition: left 0.25s ease, right 0.25s ease, color 0.15s ease, background 0.15s ease;
}
.panel-toggle:hover { background: var(--button-hover); color: var(--accent); }
.panel-toggle svg { width: 14px; height: 14px; }
#sidebar-toggle { left: 74px; border-left: none; }
#app.sidebar-collapsed #sidebar-toggle { left: 0; }
#app.sidebar-collapsed #sidebar-toggle svg { transform: scaleX(-1); }
#right-toggle {
  right: 340px;
  border-radius: 8px 0 0 8px;
  border-right: none;
  border-left: 1px solid var(--border);
}
#app.right-collapsed #right-toggle { right: 0; }
#app.right-collapsed #right-toggle svg { transform: scaleX(-1); }

/* =====================================================
   Center / canvas
   ===================================================== */
#center {
  position: relative;
  background: var(--bg);
  display: flex;
  align-items: safe center;
  justify-content: safe center;
  overflow: auto;
  padding: 32px;
}
#canvas-stage { position: relative; flex-shrink: 0; }
#canvas-wrap {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(45deg, var(--checker) 25%, transparent 25%),
    linear-gradient(-45deg, var(--checker) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--checker) 75%),
    linear-gradient(-45deg, transparent 75%, var(--checker) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  border-radius: 6px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
#canvas, #overlay { display: block; }
#overlay { position: absolute; inset: 0; pointer-events: none; }
#text-input {
  position: absolute;
  display: none;
  background: transparent;
  color: inherit;
  outline: none;
  border: 1px dashed var(--accent);
  padding: 0 2px;
}
#drop-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  font-size: 14px;
  pointer-events: none;
}

/* =====================================================
   Zoom controls
   ===================================================== */
#zoom-controls {
  position: absolute;
  bottom: 18px;
  right: 18px;
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 5px;
  box-shadow: var(--shadow-soft);
  z-index: 10;
}
#zoom-controls button {
  background: transparent;
  border: none;
  padding: 6px 10px;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 600;
  min-width: 32px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
}
#zoom-controls button:hover { background: var(--button-hover); color: var(--text); }
#zoom-level { font-size: 12px !important; min-width: 56px !important; color: var(--text) !important; }
.zoom-divider { width: 1px; height: 18px; background: var(--border); margin: 0 4px; }

/* =====================================================
   Right panel
   ===================================================== */
#right {
  background: var(--panel);
  border-left: 1px solid var(--border);
  padding: 12px 12px;
  overflow-y: auto;
  overflow-x: hidden;
  transition: padding 0.25s ease;
}
#app.right-collapsed #right { padding: 0; border-left: none; }

/* Collapsible sections */
.panel-section {
  border: 1px solid var(--border);
  background: var(--panel-2);
  border-radius: 10px;
  margin-bottom: 8px;
  overflow: hidden;
}
.section-head {
  width: 100%;
  background: transparent;
  border: none;
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  border-radius: 0;
}
.section-head:hover { background: var(--button-hover); }
.section-icon {
  width: 16px;
  height: 16px;
  color: var(--text-dim);
  flex-shrink: 0;
}
.section-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-dim);
  flex: 1;
  text-align: left;
}
.section-chevron {
  width: 14px;
  height: 14px;
  color: var(--text-faint);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.panel-section.collapsed .section-chevron { transform: rotate(-90deg); }
.section-body {
  padding: 4px 14px 14px;
  max-height: 1200px;
  opacity: 1;
  overflow: hidden;
  transition: max-height 0.25s ease, opacity 0.2s ease, padding 0.25s ease;
}
.panel-section.collapsed .section-body {
  max-height: 0;
  opacity: 0;
  padding-top: 0;
  padding-bottom: 0;
}

/* Adjustment badges in section header */
.adj-badges {
  display: flex;
  gap: 3px;
  flex-shrink: 0;
  flex-wrap: nowrap;
  justify-content: flex-end;
}
.adj-badge {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.2px;
  padding: 2px 4px;
  border-radius: 4px;
  background: var(--panel-3);
  color: var(--text-faint);
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  gap: 1px;
  font-variant-numeric: tabular-nums;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.adj-badge em {
  font-style: normal;
  font-weight: 700;
}
.adj-badge.nonzero {
  background: rgba(240, 195, 80, 0.12);
  color: var(--accent);
  border-color: var(--accent);
}
[data-theme="cyberpunk"] .adj-badge.nonzero { background: rgba(255, 46, 234, 0.15); }
[data-theme="forest"] .adj-badge.nonzero { background: rgba(127, 201, 127, 0.15); }
[data-theme="light"] .adj-badge.nonzero { background: rgba(200, 160, 0, 0.15); }

/* Aligned-grid label rows */
#right label {
  display: grid;
  grid-template-columns: 80px 1fr 30px;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  margin-bottom: 8px;
  color: var(--text-dim);
}
#right label .lbl {
  font-size: 12px;
  color: var(--text-dim);
  text-align: left;
}
#right label .val {
  text-align: right;
  color: var(--text);
  font-weight: 600;
  font-size: 12px;
}
#right label > input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  margin: 0;
}
#right label > input[type="color"] {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 36px;
  height: 22px;
  cursor: pointer;
  padding: 0;
  justify-self: start;
}
#right .row {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}
#right .row button { flex: 1; }
#right .section-body > button { width: 100%; }
.filters {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}
.filters button { padding: 8px; font-size: 12px; border-radius: 8px; }

/* Color row — label + picker + 8 small circular preset swatches */
.color-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding: 6px 10px;
  background: var(--panel-3);
  border-radius: 8px;
  border: 1px solid var(--border);
}
.color-row-lbl {
  font-size: 12px;
  color: var(--text-dim);
  flex-shrink: 0;
}
.color-row > input[type="color"] {
  width: 24px;
  height: 22px;
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  background: transparent;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}
.color-presets {
  display: flex;
  gap: 5px;
  flex: 1;
  min-width: 0;
  justify-content: flex-end;
}
.color-presets .swatch {
  width: 16px;
  height: 16px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  cursor: pointer;
  transition: transform 0.1s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  flex-shrink: 0;
}
.color-presets .swatch:hover {
  transform: scale(1.25);
  border-color: var(--accent);
}
.color-presets .swatch.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent);
}
.clear-filters-btn {
  margin-top: 10px;
  padding: 8px;
  font-size: 12px;
  border-radius: 8px;
  background: transparent;
  border: 1px dashed var(--border-strong);
  color: var(--text-dim);
}
.clear-filters-btn:hover {
  background: var(--button-hover);
  color: var(--accent);
  border-color: var(--accent);
  border-style: solid;
}
.hint {
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 8px;
  margin-bottom: 8px;
  line-height: 1.5;
}

/* =====================================================
   Loading overlay
   ===================================================== */
#loading {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 20;
  backdrop-filter: blur(2px);
}
#loading.on { display: flex; }
.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* =====================================================
   Modals
   ===================================================== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}
.modal.hidden { display: none; }
.modal-box {
  background: var(--panel-2);
  padding: 24px;
  border-radius: 14px;
  min-width: 340px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.modal-box h3 { margin-bottom: 16px; font-size: 15px; font-weight: 600; }
.modal-box input {
  width: 100%;
  padding: 10px 12px;
  background: var(--panel-3);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 13px;
}
.modal-box input:focus { outline: none; border-color: var(--accent); }
.modal-err { color: var(--error); font-size: 12px; margin-bottom: 8px; }
.hidden { display: none; }

/* =====================================================
   Landing
   ===================================================== */
#landing {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}
#landing.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
#landing-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}
#landing-logo { margin-bottom: 8px; filter: drop-shadow(var(--shadow-soft)); }
#landing-title { font-size: 36px; font-weight: 700; color: var(--accent); letter-spacing: .5px; margin: 0; }
#landing-sub { font-size: 13px; color: var(--text-faint); margin: 0; letter-spacing: 1.5px; }
#landing-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 24px;
  width: 260px;
}
#landing-actions button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 0;
  font-size: 14px;
  border-radius: 10px;
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--shadow-tiny);
}
#landing-actions button:hover {
  background: var(--button-hover);
  border-color: var(--accent);
  color: var(--accent);
}
#landing-actions button:hover svg { stroke: var(--accent); }
#landing-actions button.primary {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
  box-shadow: var(--shadow-soft);
}
#landing-actions button.primary:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: var(--accent-text);
}
#landing-actions button.primary:hover svg { stroke: var(--accent-text); }
#landing-hint { font-size: 12px; color: var(--text-faint); margin-top: 10px; }

/* =====================================================
   Theme popover
   ===================================================== */
.popover {
  position: absolute;
  background: var(--panel-2);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  padding: 6px;
  box-shadow: var(--shadow);
  z-index: 60;
  min-width: 180px;
}
#theme-popover { top: 86px; right: 16px; }
.theme-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
}
.theme-option span {
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
}
.theme-option:hover { background: var(--button-hover); }
.theme-option:hover span { color: var(--accent); }
.theme-swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: var(--shadow-tiny);
}

/* =====================================================
   Compress & Save modals
   ===================================================== */
.compress-box { min-width: 380px; }
.compress-box label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 8px;
  margin-top: 14px;
  font-weight: 500;
}
.format-row { display: flex; gap: 6px; margin-bottom: 4px; }
.format-row .format-btn,
.format-row .save-fmt-btn {
  flex: 1;
  padding: 10px;
  background: var(--panel-3);
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  border-radius: 8px;
  font-weight: 600;
}
.format-row .format-btn:hover,
.format-row .save-fmt-btn:hover { background: var(--button-hover); color: var(--text); }
.format-row .format-btn.active,
.format-row .save-fmt-btn.active {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}
#quality-slider { width: 100%; accent-color: var(--accent); }
#quality-val { color: var(--accent); font-weight: 700; }
.size-display {
  background: var(--panel-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-top: 16px;
  margin-bottom: 16px;
}
.size-line { font-size: 12px; }
.size-line + .size-line { margin-top: 6px; }
.size-label { color: var(--text-dim); margin-right: 8px; }
#size-estimate { color: var(--text); font-weight: 700; }
.size-compare { color: var(--text-faint); font-size: 11px; }
#quality-row.disabled { opacity: 0.4; pointer-events: none; }

/* =====================================================
   Custom scrollbars
   ===================================================== */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 6px;
  border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover { background: var(--text-faint); }