:root {
  --bg: #f4f1ea;
  --ink: #171717;
  --muted: #6d6a64;
  --line: #ded8cc;
  --panel: #fffdf8;
  --panel-2: #f9f6ef;
  --panel-rgb: 255, 253, 248;
  --panel-2-rgb: 249, 246, 239;
  --field: #fffefa;
  --segment: #ece6da;
  --drop-border: #b9b0a1;
  --grid-line: rgba(23, 23, 23, 0.035);
  --preview-bg: #e9e3d7;
  --svg-shadow: 0 12px 28px rgba(39, 34, 24, 0.16);
  --accent: #0e7c66;
  --accent-dark: #075946;
  --blue: #315f8c;
  --danger: #a93232;
  --shadow: 0 18px 50px rgba(39, 34, 24, 0.14);
  color-scheme: light;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

[data-theme="dark"] {
  --bg: #111417;
  --ink: #f2efe7;
  --muted: #aaa49a;
  --line: #34312d;
  --panel: #1b1d20;
  --panel-2: #232529;
  --panel-rgb: 27, 29, 32;
  --panel-2-rgb: 35, 37, 41;
  --field: #15181b;
  --segment: #2b2d31;
  --drop-border: #565149;
  --grid-line: rgba(242, 239, 231, 0.055);
  --preview-bg: #171a1e;
  --svg-shadow: 0 16px 32px rgba(0, 0, 0, 0.34);
  --accent: #2db790;
  --accent-dark: #68d4b8;
  --blue: #81acd8;
  --danger: #ff817b;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.32);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(120deg, rgba(14, 124, 102, 0.14), transparent 32%),
    linear-gradient(300deg, rgba(49, 95, 140, 0.13), transparent 30%),
    var(--bg);
  color: var(--ink);
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
}

.shell {
  width: min(1800px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 18px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 14px;
}

.topbar {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(var(--panel-rgb), 0.82);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand,
.topActions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--panel);
  font-weight: 800;
  font-size: 20px;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 19px;
  line-height: 1.15;
}

h2 {
  font-size: 15px;
}

.subline,
.mini,
.status,
.pill,
.dropMeta {
  color: var(--muted);
  font-size: 12px;
}

.pill {
  min-width: 72px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-2);
}

.pill.good {
  color: var(--accent-dark);
  border-color: rgba(14, 124, 102, 0.25);
  background: rgba(14, 124, 102, 0.1);
}

.ghost,
.primary,
.convertButton,
.themeToggle {
  height: 36px;
  padding: 0 14px;
  border-radius: 8px;
  cursor: pointer;
  transition:
    transform 0.16s ease,
    background 0.16s ease,
    opacity 0.16s ease;
}

.ghost {
  color: var(--ink);
  background: var(--panel-2);
  border: 1px solid var(--line);
}

.themeToggle {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ink);
  background: var(--panel-2);
  border: 1px solid var(--line);
  white-space: nowrap;
}

.primary,
.convertButton {
  color: white;
  background: var(--accent);
}

.ghost:hover,
.primary:hover,
.convertButton:hover,
.themeToggle:hover {
  transform: translateY(-1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

.workspace {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(360px, 0.95fr) minmax(420px, 1.25fr);
  gap: 14px;
}

.panel {
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(var(--panel-rgb), 0.92);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.inputPanel,
.codePanel,
.previewPanel {
  display: flex;
  flex-direction: column;
}

.panelHead {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(var(--panel-2-rgb), 0.84);
}

.segments {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  margin: 14px;
  padding: 4px;
  border-radius: 8px;
  background: var(--segment);
}

.segments button {
  height: 34px;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.segments button.active {
  color: var(--ink);
  background: var(--panel);
  box-shadow: 0 4px 14px rgba(39, 34, 24, 0.08);
}

.dropzone {
  min-height: 168px;
  margin: 0 14px 14px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  border: 1px dashed var(--drop-border);
  border-radius: 8px;
  background: var(--panel-2);
  cursor: pointer;
  text-align: center;
}

.dropzone.hasFile {
  border-color: rgba(14, 124, 102, 0.48);
  background: rgba(14, 124, 102, 0.08);
}

.dropzone input {
  display: none;
}

.dropTitle {
  max-width: calc(100% - 28px);
  overflow-wrap: anywhere;
  font-weight: 700;
}

.xmlBox,
.urlInput,
.codeBox {
  width: calc(100% - 28px);
  margin: 0 14px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
  color: var(--ink);
  outline: none;
}

.xmlBox,
.codeBox {
  resize: none;
  line-height: 1.45;
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
}

.xmlBox {
  min-height: 244px;
  padding: 12px;
}

.urlInput {
  height: 42px;
  padding: 0 12px;
}

.optionGrid {
  margin: auto 14px 14px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.optionGrid label {
  display: grid;
  grid-template-columns: 1fr 88px;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

.optionGrid input {
  width: 88px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 8px;
  background: var(--field);
}

.convertButton {
  margin: 0 14px 14px;
  width: calc(100% - 28px);
  font-weight: 700;
}

.errorBox {
  margin: 0 14px 14px;
  max-height: 150px;
  overflow: auto;
  white-space: pre-wrap;
  border: 1px solid rgba(169, 50, 50, 0.22);
  border-radius: 8px;
  padding: 10px;
  color: var(--danger);
  background: rgba(169, 50, 50, 0.08);
  font-size: 12px;
}

.codeBox {
  flex: 1;
  min-height: 0;
  margin-top: 14px;
  padding: 14px;
}

.previewStage {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 18px;
  background:
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    var(--preview-bg);
  background-size: 22px 22px;
}

.previewStage svg {
  display: block;
  max-width: 100%;
  margin: 0 auto 18px;
  border-radius: 4px;
  background: white;
  box-shadow: var(--svg-shadow);
}

.emptyPreview {
  min-height: 220px;
  display: grid;
  place-items: center;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(var(--panel-rgb), 0.76);
}

.busy {
  color: var(--blue);
}

@media (max-width: 1180px) {
  .workspace {
    grid-template-columns: 320px 1fr;
  }

  .previewPanel {
    grid-column: 1 / -1;
    min-height: 560px;
  }
}

@media (max-width: 760px) {
  .shell {
    padding: 10px;
  }

  .topbar,
  .topActions {
    align-items: stretch;
  }

  .topbar {
    flex-direction: column;
  }

  .topActions {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr repeat(3, minmax(58px, auto));
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .previewPanel {
    grid-column: auto;
  }

  .inputPanel,
  .codePanel,
  .previewPanel {
    min-height: 480px;
  }
}