:root {
  --bg: #eef3fb;
  --panel: #ffffff;
  --panel-glass: rgba(255, 255, 255, 0.9);
  --card-glass: rgba(255, 255, 255, 0.78);
  --card-bg: #ffffff;
  --input-bg: #ffffff;
  --input-muted-bg: rgba(255, 255, 255, 0.74);
  --stage-bg: #f8fafc;
  --stage-pattern: rgba(226, 232, 240, 0.45);
  --code-bg: #0f172a;
  --code-text: #dbeafe;
  --text: #111827;
  --muted: #64748b;
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --brand-soft: #dbeafe;
  --accent: #14b8a6;
  --danger: #dc2626;
  --border: #d8e2f0;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.1);
  --radius: 22px;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --panel: #111827;
  --panel-glass: rgba(15, 23, 42, 0.9);
  --card-glass: rgba(15, 23, 42, 0.78);
  --card-bg: #111827;
  --input-bg: #0f172a;
  --input-muted-bg: rgba(15, 23, 42, 0.74);
  --stage-bg: #111827;
  --stage-pattern: rgba(51, 65, 85, 0.55);
  --code-bg: #020617;
  --code-text: #bfdbfe;
  --text: #f8fafc;
  --muted: #94a3b8;
  --brand: #60a5fa;
  --brand-dark: #93c5fd;
  --brand-soft: rgba(37, 99, 235, 0.22);
  --accent: #2dd4bf;
  --border: #334155;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.2), transparent 34rem),
    radial-gradient(circle at 85% 10%, rgba(20, 184, 166, 0.18), transparent 24rem),
    linear-gradient(135deg, var(--panel) 0%, var(--bg) 52%, var(--panel) 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  transition: background 0.2s ease, color 0.2s ease;
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px auto;
  gap: 28px;
  align-items: end;
  max-width: 1180px;
  margin: 0 auto;
  padding: 58px 20px 24px;
}

.app-header h1 {
  margin: 0;
  max-width: 850px;
  font-size: clamp(2.35rem, 6vw, 5.1rem);
  line-height: 0.94;
  letter-spacing: -0.05em;
}

.app-header p {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.7;
}

.hero-card {
  display: grid;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--card-glass);
  box-shadow: var(--shadow);
  padding: 24px;
  backdrop-filter: blur(16px);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card-glass);
  color: var(--text);
  box-shadow: var(--shadow);
  padding: 12px 15px;
  cursor: pointer;
  font-weight: 900;
  white-space: nowrap;
  backdrop-filter: blur(16px);
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.theme-toggle:hover {
  border-color: var(--brand);
  transform: translateY(-1px);
}

.theme-toggle-icon {
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  padding: 4px 8px;
  font-size: 0.72rem;
  text-transform: uppercase;
}

.hero-card strong {
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.hero-card small {
  color: var(--muted);
  line-height: 1.5;
}

.app-shell {
  display: grid;
  gap: 26px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 20px 56px;
}

.panel {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-glass);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.panel h2 {
  margin: 0;
  font-size: 1.05rem;
}

.panel p {
  margin: 7px 0 0;
  color: var(--muted);
}

.upload-panel,
.output-panel,
.import-panel,
.editor-panel,
.side-column .panel {
  padding: 20px;
}

.upload-step,
.editor-flow {
  display: grid;
  gap: 18px;
}

.upload-step.hidden,
.editor-flow.locked {
  display: none;
}

.step-heading {
  display: flex;
  align-items: center;
  gap: 15px;
}

.step-heading h2 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 2.15rem);
  letter-spacing: -0.04em;
}

.step-heading p {
  margin: 5px 0 0;
  color: var(--muted);
}

.step-number {
  display: grid;
  flex: 0 0 46px;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 15px;
  background: linear-gradient(135deg, var(--brand), #60a5fa);
  color: #fff;
  box-shadow: 0 16px 35px rgba(37, 99, 235, 0.28);
  font-weight: 900;
}

.upload-options {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 18px;
}

.upload-card {
  position: relative;
  display: grid;
  gap: 12px;
  min-height: 245px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--card-glass);
  box-shadow: var(--shadow);
  padding: 28px;
  cursor: pointer;
  transition: border-color 0.16s ease, transform 0.16s ease, box-shadow 0.16s ease;
}

.upload-card:hover,
.upload-card:focus-within {
  border-color: rgba(37, 99, 235, 0.44);
  box-shadow: 0 26px 80px rgba(37, 99, 235, 0.16);
  transform: translateY(-2px);
}

.upload-card strong {
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  letter-spacing: -0.04em;
}

.upload-card small {
  max-width: 480px;
  color: var(--muted);
  line-height: 1.55;
}

.upload-icon {
  width: fit-content;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  padding: 7px 11px;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.upload-card input[type="file"] {
  width: 100%;
  border: 1px dashed #b7c7dd;
  border-radius: 18px;
  background: var(--input-muted-bg);
  padding: 16px;
  color: var(--muted);
  cursor: pointer;
}

.url-card {
  cursor: default;
}

.upload-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2fr;
  gap: 16px;
  margin-top: 18px;
}

.url-loader {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 12px;
}

.field,
.tool-field {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.field input,
.field select,
.tool-field select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--input-bg);
  color: var(--text);
  padding: 11px 12px;
  outline: none;
}

.field input:focus,
.field select:focus,
.tool-field select:focus,
textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

.check-field {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
}

.button {
  border: 0;
  border-radius: 12px;
  background: var(--brand);
  color: #fff;
  padding: 11px 15px;
  cursor: pointer;
  font-weight: 800;
  box-shadow: 0 12px 25px rgba(37, 99, 235, 0.22);
  transition: transform 0.15s ease, background 0.15s ease, opacity 0.15s ease, box-shadow 0.15s ease;
}

.button:hover:not(:disabled) {
  background: var(--brand-dark);
  box-shadow: 0 16px 35px rgba(37, 99, 235, 0.28);
  transform: translateY(-1px);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.button.secondary {
  background: var(--brand-soft);
  color: var(--brand-dark);
  box-shadow: none;
}

.button.secondary:hover:not(:disabled) {
  background: #dbe7ff;
}

.button.ghost {
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  box-shadow: none;
}

.button.ghost:hover:not(:disabled) {
  background: #f4f7fb;
}

.button.danger {
  background: #fee2e2;
  color: var(--danger);
  box-shadow: none;
}

.button.danger:hover:not(:disabled) {
  background: #fecaca;
}

.status {
  width: fit-content;
  min-height: 22px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--input-muted-bg);
  margin-top: 0;
  padding: 9px 13px;
  font-size: 0.92rem;
  font-weight: 700;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.file-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.import-textarea {
  min-height: 170px;
}

.import-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 14px;
}

.inline-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.inline-status.error {
  color: var(--danger);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 22px;
  align-items: start;
}

.side-column {
  display: grid;
  gap: 18px;
}

.panel-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 18px;
}

.panel-heading.compact {
  align-items: center;
  margin-bottom: 14px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: end;
  justify-content: flex-end;
}

.sidebar-toolbar {
  display: grid;
  align-items: stretch;
  justify-content: stretch;
}

.map-toolbar {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--input-muted-bg);
  padding: 10px;
  text-align: left;
}

.draw-tools-heading {
  min-width: 180px;
}

.draw-tools-heading h2 {
  margin: 0;
  font-size: 0.95rem;
}

.map-toolbar .helper-text {
  max-width: 360px;
  margin-top: 3px;
  font-size: 0.78rem;
}

.map-toolbar .sidebar-toolbar {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  gap: 8px;
  align-items: end;
  justify-content: flex-end;
}

.map-toolbar .button,
.map-toolbar .sidebar-toolbar .button {
  width: auto;
  padding: 9px 11px;
  white-space: nowrap;
}

.compact-button {
  min-width: 42px;
}

.zoom-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: end;
  border-left: 1px solid var(--border);
  padding-left: 10px;
}

.zoom-field {
  display: grid;
  min-width: 130px;
  gap: 5px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
}

.zoom-field input {
  accent-color: var(--brand);
}

.compact-button.active {
  background: var(--brand);
  color: #fff;
}

.compact-tool {
  min-width: 150px;
}

.compact-tool select {
  padding-top: 9px;
  padding-bottom: 9px;
}

.mode-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--input-muted-bg);
  padding: 5px;
}

.mode-button {
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 10px;
  font-weight: 900;
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.mode-button:hover {
  color: var(--text);
}

.mode-button.active {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.22);
}

.map-toolbar .mode-actions {
  min-width: 220px;
}

.map-toolbar .mode-button {
  padding: 9px 10px;
}

.sidebar-toolbar .button {
  width: 100%;
}

.helper-text {
  margin-top: 12px;
  font-size: 0.88rem;
  line-height: 1.5;
}

.image-panel {
  padding: 14px;
}

.map-viewport {
  overflow: auto;
  max-height: min(72vh, 760px);
  border-radius: 20px;
  text-align: center;
}

.map-viewport.panning {
  cursor: grabbing;
  user-select: none;
}

.stage {
  position: relative;
  display: inline-block;
  min-height: 360px;
  border: 1px dashed var(--border);
  border-radius: 20px;
  background:
    linear-gradient(45deg, var(--stage-pattern) 25%, transparent 25%),
    linear-gradient(-45deg, var(--stage-pattern) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--stage-pattern) 75%),
    linear-gradient(-45deg, transparent 75%, var(--stage-pattern) 75%),
    var(--stage-bg);
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
  background-size: 24px 24px;
  vertical-align: top;
}

.stage.empty {
  display: grid;
  width: 100%;
  max-width: 100%;
  place-items: center;
}

.stage-placeholder {
  display: grid;
  gap: 6px;
  padding: 24px;
  color: var(--muted);
  text-align: center;
}

.stage-placeholder strong {
  color: var(--text);
}

#sourceImage {
  display: none;
  max-width: 100%;
  height: auto;
  border-radius: 20px;
  user-select: none;
}

#overlay {
  position: absolute;
  inset: 0;
  display: none;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: none;
}

#overlay.select-mode {
  cursor: pointer;
}

#overlay.pan-mode {
  cursor: grab;
}

#overlay.pan-mode.panning {
  cursor: grabbing;
}

.stage.has-image {
  min-height: 0;
  border-style: solid;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.02);
}

.stage.has-image #sourceImage,
.stage.has-image #overlay {
  display: block;
}

.stage.has-image .stage-placeholder {
  display: none;
}

.area-form {
  display: grid;
  gap: 14px;
}

.areas-list {
  display: grid;
  gap: 10px;
  max-height: 360px;
  overflow: auto;
}

.area-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--input-bg);
  padding: 10px;
  color: var(--text);
  cursor: pointer;
  text-align: left;
}

.area-item:hover,
.area-item.selected {
  border-color: var(--brand);
  background: var(--brand-soft);
}

.area-item strong {
  display: block;
  font-size: 0.93rem;
}

.area-item span {
  color: var(--muted);
  font-size: 0.78rem;
}

.shape-badge {
  border-radius: 999px;
  background: #e8eefc;
  color: var(--brand-dark);
  padding: 5px 8px;
  font-size: 0.72rem;
  font-weight: 900;
  text-transform: uppercase;
}

.empty-list {
  color: var(--muted);
  font-style: italic;
}

textarea {
  width: 100%;
  min-height: 260px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--code-bg);
  color: var(--code-text);
  padding: 16px;
  font-family: "Cascadia Code", "Fira Code", Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.55;
  outline: none;
  resize: vertical;
}

.output-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.output-block {
  display: grid;
  gap: 10px;
}

.output-subheading {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.output-subheading h3 {
  margin: 0;
  font-size: 0.95rem;
}

.map-shape {
  fill: rgba(37, 99, 235, 0.24);
  stroke: #2563eb;
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.map-shape.selected {
  fill: rgba(220, 38, 38, 0.24);
  stroke: #dc2626;
}

.draft-shape {
  fill: rgba(20, 184, 166, 0.18);
  stroke: #0f766e;
  stroke-dasharray: 8 5;
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.poly-point {
  fill: #0f766e;
  stroke: #fff;
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.info-footer {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.info-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-glass);
  box-shadow: var(--shadow);
  padding: 26px;
  backdrop-filter: blur(12px);
}

.info-kicker {
  display: inline-flex;
  width: fit-content;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  padding: 6px 10px;
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.info-card h2 {
  margin: 14px 0 10px;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  letter-spacing: -0.04em;
}

.info-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.info-card p + p {
  margin-top: 12px;
}

@media (max-width: 920px) {
  .app-header,
  .workspace,
  .output-grid,
  .info-footer,
  .upload-options,
  .upload-grid,
  .url-loader {
    grid-template-columns: 1fr;
  }

  .app-header {
    padding-top: 36px;
  }

  .hero-card {
    max-width: 440px;
  }

  .upload-card {
    min-height: auto;
  }

  .panel-heading {
    display: grid;
  }

  .toolbar {
    justify-content: flex-start;
  }

  .map-toolbar,
  .map-toolbar .sidebar-toolbar {
    display: grid;
    justify-content: stretch;
  }

  .map-toolbar .button,
  .map-toolbar .sidebar-toolbar .button,
  .compact-tool {
    width: 100%;
  }

  .stage {
    width: 100%;
  }
}

@media (max-width: 560px) {
  .app-shell,
  .app-header {
    padding-right: 14px;
    padding-left: 14px;
  }

  .upload-card,
  .upload-panel,
  .output-panel,
  .import-panel,
  .editor-panel,
  .side-column .panel {
    padding: 16px;
    border-radius: 18px;
  }

  .step-heading {
    align-items: flex-start;
  }

  .toolbar,
  .panel-heading.compact {
    align-items: stretch;
  }

  .button {
    width: 100%;
  }
}