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

[hidden] {
  display: none !important;
}

:root {
  --gray-100: #f5f5f5;
  --gray-150: #ededed;
  --gray-200: #ebebeb;
  --gray-300: #d3d3d3;
  --gray-400: #c3c3c3;
  --gray-500: #a8a8a8;
  --border-subtle: rgba(0, 0, 0, 0.1);
  --text-primary: #111111;
  --text-secondary: #555555;
  --surface: #ffffff;
  --app-bg: #f6f6f6;
  --accent-bg: #191919;
  --accent-bg-hover: #333333;
  --accent-text: #ffffff;
  /* The whole layout was tuned looking at it under 80% browser zoom, so every size below is
     already that scale baked in directly (rather than relying on the zoom CSS property, which
     doesn't play well with 100vw/100vh — it leaves dead space instead of filling the viewport). */
  --sidebar-width: 272px;
}

/* Follows the OS/browser light-dark preference by default. The footer mode-toggle button sets
   an explicit html[data-theme] that outranks the system preference either direction — "light"
   suppresses this media block even under a dark OS, and the [data-theme="dark"] block below
   applies dark tokens even under a light OS. Keep both dark token blocks in sync by hand. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --gray-100: #242424;
    --gray-150: #262626;
    --gray-200: #303030;
    --gray-300: #454545;
    --gray-400: #565656;
    --gray-500: #8a8a8a;
    --border-subtle: rgba(255, 255, 255, 0.12);
    --text-primary: #f0f0f0;
    --text-secondary: #a8a8a8;
    --surface: #1e1e1e;
    --app-bg: #121212;
    --accent-bg: #f0f0f0;
    --accent-bg-hover: #ffffff;
    --accent-text: #111111;
  }

  /* The icon SVGs are flat black shapes with no theme awareness of their own — inverting them
     is simpler and more robust than maintaining light/dark copies of every icon file. */
  :root:not([data-theme="light"]) .icon-btn img,
  :root:not([data-theme="light"]) .icon-circle-btn img,
  :root:not([data-theme="light"]) .tab-btn .tab-close img,
  :root:not([data-theme="light"]) .canvas-clear-btn img,
  :root:not([data-theme="light"]) .sidebar-reopen-btn img,
  :root:not([data-theme="light"]) .modal-close img {
    filter: invert(1);
  }
}

:root[data-theme="dark"] {
  --gray-100: #242424;
  --gray-150: #262626;
  --gray-200: #303030;
  --gray-300: #454545;
  --gray-400: #565656;
  --gray-500: #8a8a8a;
  --border-subtle: rgba(255, 255, 255, 0.12);
  --text-primary: #f0f0f0;
  --text-secondary: #a8a8a8;
  --surface: #1e1e1e;
  --app-bg: #121212;
  --accent-bg: #f0f0f0;
  --accent-bg-hover: #ffffff;
  --accent-text: #111111;
}

:root[data-theme="dark"] .icon-btn img,
:root[data-theme="dark"] .icon-circle-btn img,
:root[data-theme="dark"] .tab-btn .tab-close img,
:root[data-theme="dark"] .canvas-clear-btn img,
:root[data-theme="dark"] .sidebar-reopen-btn img,
:root[data-theme="dark"] .modal-close img {
  filter: invert(1);
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 10.4px;
  color: var(--text-primary);
  background: var(--app-bg);
}

button {
  font: inherit;
  color: inherit;
}

.app-shell {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* ---------- Sidebar ---------- */

.sidebar {
  position: relative;
  width: var(--sidebar-width);
  min-width: 0;
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  transition: margin-left 0.2s ease;
}

.sidebar.collapsed {
  margin-left: calc(-1 * var(--sidebar-width));
}

.sidebar-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 22px 19px 13px;
}

.sidebar-header h1 {
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}

.divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 16px 0;
}

.pill {
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  background: var(--surface);
  padding: 6px 11px;
  font-size: 0.66rem;
  color: var(--text-primary);
}

.pill-dark {
  background: var(--accent-bg);
  color: var(--accent-text);
  border-color: var(--accent-bg);
  cursor: pointer;
}

.pill-dark:hover {
  background: var(--accent-bg-hover);
}

/* ---------- Font drop ---------- */

.font-drop-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.font-drop-zone {
  flex: 1;
  padding: 7px 13px;
  border-radius: 999px;
  background: var(--gray-200);
  color: var(--text-primary);
  font-size: 0.66rem;
  cursor: pointer;
  transition: background 0.15s ease;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.font-drop-zone:hover,
.font-drop-zone.dragging {
  background: var(--gray-300);
}

.icon-btn {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: none;
  background: var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.icon-btn:hover {
  background: var(--gray-300);
}

.icon-btn img {
  width: 10.5px;
  height: 9px;
}

.scribble-text-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
}

.scribble-text-row input {
  flex: 1;
  min-width: 0;
}

.scribble-text-row button {
  flex-shrink: 0;
  cursor: pointer;
}

/* ---------- Section headers ---------- */

.panel-section h2 {
  font-size: 0.84rem;
  font-weight: 700;
  margin-bottom: 11px;
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
}

.control-row label {
  color: var(--text-primary);
  font-size: 0.66rem;
  flex-shrink: 0;
}

.control-row .pill,
.control-row select,
.control-row input {
  width: 134px;
}

/* ---------- Stroke: color format row ---------- */

.color-format-row {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 10px;
}

.dropdown-pill {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 3px;
  white-space: nowrap;
}

.chevron {
  font-size: 0.56rem;
  color: var(--text-secondary);
}

.hex-input {
  flex: 1;
  min-width: 0;
  text-align: left;
  text-transform: uppercase;
}

.opacity-input {
  width: 56px;
  text-align: right;
  flex-shrink: 0;
}

.dropdown-wrapper {
  position: relative;
  flex-shrink: 0;
}

.color-format-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 4px;
  width: 100%;
  min-width: 68px;
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  overflow: hidden;
  z-index: 10;
}

.color-format-option {
  display: block;
  width: 100%;
  padding: 6px 11px;
  border: none;
  background: var(--surface);
  color: var(--text-primary);
  font-size: 0.66rem;
  text-align: left;
  cursor: pointer;
}

.color-format-option:hover {
  background: var(--gray-100);
}

.rgb-inputs {
  flex: 1;
  min-width: 0;
  display: flex;
  gap: 4px;
}

.rgb-input {
  flex: 1;
  min-width: 0;
  width: auto;
  text-align: center;
  padding: 6px 4px;
  -moz-appearance: textfield;
}

.rgb-input::-webkit-outer-spin-button,
.rgb-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* ---------- Stroke: SV / hue / alpha pickers ---------- */

.sv-picker {
  position: relative;
  width: 100%;
  height: 136px;
  border-radius: 8px;
  margin-bottom: 10px;
  cursor: crosshair;
  background-image:
    linear-gradient(to top, #000000, rgba(0, 0, 0, 0)),
    linear-gradient(to right, #ffffff, rgba(255, 255, 255, 0));
  background-color: hsl(0, 100%, 50%);
  overflow: hidden;
}

.sv-thumb {
  position: absolute;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.4);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.track-slider {
  position: relative;
  width: 100%;
  height: 11px;
  border-radius: 999px;
  margin-bottom: 10px;
  cursor: pointer;
}

.hue-slider {
  background: linear-gradient(
    to right,
    #ff0000 0%,
    #ffff00 17%,
    #00ff00 33%,
    #00ffff 50%,
    #0000ff 67%,
    #ff00ff 83%,
    #ff0000 100%
  );
}

.alpha-slider {
  background-image:
    linear-gradient(45deg, #ccc 25%, transparent 25%),
    linear-gradient(-45deg, #ccc 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #ccc 75%),
    linear-gradient(-45deg, transparent 75%, #ccc 75%);
  background-size: 6px 6px;
  background-position:
    0 0,
    0 3px,
    3px -3px,
    -3px 0px;
}

.alpha-slider-fill {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: linear-gradient(to right, transparent, currentColor);
  color: #000;
  pointer-events: none;
}

.track-thumb {
  position: absolute;
  top: 50%;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.35);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

/* ---------- Stroke: weight / style / width profile ---------- */

.number-input,
.select-input {
  cursor: pointer;
  text-align: left;
}

.number-input {
  cursor: text;
}

.width-profile-pill {
  position: relative;
  padding: 0;
  height: 27px;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.width-profile-pill input[type="range"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.width-profile-preview {
  width: 100%;
  height: 16px;
  padding: 0 8px;
  pointer-events: none;
}

.width-profile-preview polygon {
  fill: var(--text-primary);
}

/* ---------- Pen section ---------- */

.draw-mode-row {
  display: flex;
  background: var(--gray-200);
  border-radius: 8px;
  padding: 5px;
  gap: 3px;
  margin-bottom: 8px;
}

.draw-mode-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 7px 4px;
  border: none;
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 0.6rem;
}

.draw-mode-btn:hover {
  background: rgba(0, 0, 0, 0.05);
}

.draw-mode-btn.active {
  background: var(--gray-300);
}

.draw-mode-icon {
  width: 28px;
  height: 14px;
  display: block;
  color: var(--text-primary);
}

.draw-mode-solid-swatch {
  width: 22px;
  height: 12px;
  background: var(--text-primary);
  border-radius: 2px;
  display: block;
}

.pen-preset-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--gray-200);
  border-radius: 8px;
  padding: 5px;
  gap: 3px;
}

.pen-preset-btn {
  flex: 1;
  height: 29px;
  border: none;
  border-radius: 6px;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.pen-preset-btn:hover {
  background: rgba(0, 0, 0, 0.05);
}

.pen-preset-btn.active {
  background: var(--gray-300);
}

.pen-dash {
  display: block;
  background: var(--text-primary);
  border-radius: 2px;
}

.stepper {
  display: flex;
  align-items: center;
  gap: 3px;
  padding-right: 5px;
}

.stepper input[type="number"] {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  padding: 0;
  font-size: 0.66rem;
  color: var(--text-primary);
  text-align: right;
  -moz-appearance: textfield;
}

.stepper input[type="number"]::-webkit-outer-spin-button,
.stepper input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.stepper-suffix {
  color: var(--text-secondary);
  font-size: 0.62rem;
}

.stepper-arrows {
  display: flex;
  flex-direction: column;
  line-height: 0.6;
}

.stepper-arrows button {
  border: none;
  background: transparent;
  font-size: 0.4rem;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 1px 2px;
}

.stepper-arrows button:hover {
  color: var(--text-primary);
}

.angle-picker {
  margin-top: 10px;
  background: var(--gray-150);
  border-radius: 8px;
  padding: 8px;
}

.angle-picker-svg {
  display: block;
  width: 100%;
  height: 108px;
}

.angle-baseline {
  stroke: var(--text-primary);
  stroke-width: 1.2;
  pointer-events: none;
}

.angle-ray {
  stroke: var(--gray-500);
  stroke-width: 1.6;
  stroke-linecap: round;
  pointer-events: none;
}

.angle-ray-hit {
  fill: transparent;
  pointer-events: fill;
  cursor: pointer;
}

.angle-ray-group:hover .angle-ray {
  stroke: var(--text-secondary);
}

.angle-ray-group.active .angle-ray {
  stroke: var(--text-primary);
  stroke-width: 2.6;
}

.angle-pivot {
  fill: var(--text-primary);
  pointer-events: none;
}

.angle-ray-label {
  font-size: 13px;
  fill: var(--text-secondary);
  pointer-events: none;
}

.angle-ray-group:hover .angle-ray-label {
  fill: var(--text-primary);
}

.angle-ray-group.active .angle-ray-label {
  fill: var(--text-primary);
  font-weight: 700;
}

.preview-box {
  margin-top: 11px;
  /* The canvas inside now fills itself with the real paper color (renderPreview), so this is
     just the framing behind the 6px padding, not the ink background. */
  background: var(--gray-150);
  border-radius: 8px;
  padding: 6px;
}

.preview-box canvas {
  display: block;
  width: 100%;
  height: 150px;
}

/* ---------- Export ---------- */

.export-row {
  display: flex;
  gap: 6px;
}

.export-btn {
  flex: 1;
  text-align: center;
  cursor: pointer;
  background: var(--gray-200);
  border: none;
}

.export-btn:hover {
  background: var(--gray-300);
}

.color-target-row {
  margin-bottom: 10px;
}

.color-target-btn {
  opacity: 0.5;
}

.color-target-btn.active {
  background: var(--gray-300);
  color: var(--text-primary);
  opacity: 1;
}

/* ---------- Sidebar footer ---------- */

.sidebar-footer {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 19px;
  border-top: 1px solid var(--border-subtle);
  position: relative;
}

.footer-right {
  display: flex;
  gap: 6px;
}

.icon-circle-btn {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: none;
  background: var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.icon-circle-btn:hover {
  background: var(--gray-300);
}

.icon-circle-btn img {
  width: 12px;
  height: 12px;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal {
  position: relative;
  width: min(1000px, 90vw);
  max-height: 80vh;
  background: var(--surface);
  color: var(--text-primary);
  border-radius: 12px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
  overflow-y: auto;
  padding: 32px;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: none;
  background: var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.modal-close:hover {
  background: var(--gray-300);
}

.modal-close img {
  width: 15px;
  height: 13.5px;
}

.modal-content h2 {
  font-size: 1.65rem;
  margin-bottom: 12px;
}

.modal-content p {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.modal-content img {
  display: block;
  max-width: 100%;
  border-radius: 8px;
  margin: 12px 0;
}

.modal-photos:empty {
  display: none;
}

.modal-photos img {
  display: block;
  width: 100%;
  margin-bottom: 8px;
  border-radius: 0;
}

.modal-content h3 {
  font-size: 1.28rem;
  margin: 20px 0 10px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

.modal-credits {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 16px;
  row-gap: 6px;
  font-size: 1.08rem;
  line-height: 1.5;
}

.modal-credits dt {
  color: var(--text-secondary);
  white-space: nowrap;
}

.modal-credits dd {
  margin: 0;
  color: var(--text-primary);
}

.sidebar-reopen-btn {
  position: fixed;
  top: 13px;
  left: 13px;
  z-index: 20;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: none;
  background: var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.56rem;
}

.sidebar-reopen-btn img {
  width: 9px;
  height: 7.5px;
}

.icon-flip-h {
  transform: scaleX(-1);
}

.sidebar-reopen-btn:hover {
  background: var(--gray-300);
}

/* ---------- Canvas area ---------- */

.canvas-area {
  position: relative;
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.tab-bar {
  flex-shrink: 0;
  display: flex;
  height: 32px;
}

.tab-btn {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--gray-200);
  border: none;
  border-right: 1px solid rgba(0, 0, 0, 0.06);
  font-size: 0.64rem;
  color: var(--text-secondary);
  cursor: pointer;
  position: relative;
  padding: 0 6px;
}

.tab-btn.active {
  background: var(--gray-400);
  color: var(--text-primary);
}

.tab-btn .tab-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tab-name-input {
  width: 100%;
  max-width: 160px;
  background: var(--surface);
  border: 1px solid rgba(0, 0, 0, 0.25);
  border-radius: 4px;
  padding: 2px 6px;
  font: inherit;
  color: var(--text-primary);
  text-align: center;
}

.tab-btn .tab-close {
  flex-shrink: 0;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.12);
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.tab-btn:hover .tab-close {
  display: flex;
}

.tab-btn .tab-close img {
  width: 7.5px;
  height: 7.5px;
}

.tab-add-btn {
  flex-shrink: 0;
  width: 32px;
  background: var(--gray-100);
  border: none;
  border-right: 1px solid rgba(0, 0, 0, 0.06);
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.tab-add-btn:hover {
  background: var(--gray-200);
}

.canvas-clear-btn {
  position: absolute;
  top: 42px;
  right: 13px;
  z-index: 10;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: none;
  background: var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.canvas-clear-btn:hover {
  background: var(--gray-300);
}

.canvas-clear-btn img {
  width: 13.5px;
  height: 12px;
}

#canvas {
  flex: 1;
  display: block;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  background-color: #fff;
  cursor: crosshair;
}

@media (max-width: 900px) {
  body {
    overflow: auto;
  }

  .app-shell {
    flex-direction: column;
    width: 100%;
    height: auto;
  }

  .sidebar {
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }

  .canvas-area {
    height: 60vh;
  }
}