:root {
  color-scheme: dark;
  --bg: #101318;
  --panel: #171b22;
  --panel-border: #2a313d;
  --text: #ebeff4;
  --muted: #9ba8bb;
  --accent: #7db8ff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}
button, input, select {
  font: inherit;
}
.topbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--panel-border);
  background: #12161c;
  position: sticky;
  top: 0;
  z-index: 5;
}
.topbar h1 { margin: 0; font-size: 1.25rem; }
.subtle { color: var(--muted); margin: 0.35rem 0 0; }
.actions { display: flex; gap: 0.75rem; }
button {
  border: 1px solid var(--panel-border);
  background: #1d2430;
  color: var(--text);
  border-radius: 10px;
  padding: 0.65rem 0.95rem;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
.layout {
  display: grid;
  grid-template-columns: 430px 1fr;
  min-height: calc(100vh - 78px);
}
.sidebar {
  border-right: 1px solid var(--panel-border);
  padding: 1rem;
  overflow: auto;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 1rem;
  margin-bottom: 1rem;
}
.panel h2 { margin-top: 0; font-size: 1rem; }
.grid {
  display: grid;
  gap: 0.8rem;
}
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
label { display: grid; gap: 0.35rem; font-size: 0.9rem; }
label span { color: var(--muted); }
input, select {
  width: 100%;
  background: #0f141b;
  color: var(--text);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 0.6rem 0.7rem;
}
.checkbox { display: flex; align-items: center; gap: 0.65rem; margin-bottom: 0.75rem; }
.checkbox input { width: auto; }
.file-input span {
  display: inline-block;
  background: #1d2430;
  padding: 0.65rem 0.8rem;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  width: 100%;
  text-align: center;
}
.file-input input { display: none; }
.preset-row { display: flex; gap: 0.5rem; margin-top: 0.75rem; }
.viewer-area {
  padding: 1rem;
  overflow: auto;
}
.preview-shell {
  min-height: calc(100vh - 120px);
  display: grid;
  place-items: center;
  border: 1px dashed var(--panel-border);
  border-radius: 18px;
  background: radial-gradient(circle at top, #171b24, #0f1319 55%);
  overflow: auto;
}
.placeholder { color: var(--muted); }
.preview { width: 100%; display: grid; place-items: center; padding: 2rem; }
.preview svg { max-width: 100%; height: auto; background: white; box-shadow: 0 18px 48px rgba(0,0,0,0.35); }
#statsBox {
  white-space: pre-wrap;
  font-size: 0.85rem;
  color: #d3d9e4;
  background: #0f141b;
  padding: 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
}
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { border-right: none; border-bottom: 1px solid var(--panel-border); }
}


.drop-zone {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.9rem;
  align-items: center;
  padding: 1rem;
  border: 1px dashed #4d607a;
  border-radius: 14px;
  background: #121821;
  transition: border-color 120ms ease, background 120ms ease, transform 120ms ease;
  margin-bottom: 1rem;
}
.drop-zone:hover,
.drop-zone:focus-visible {
  border-color: var(--accent);
  background: #15202b;
  outline: none;
}
.drop-zone.is-dragover {
  border-color: #a8d0ff;
  background: #182432;
  transform: translateY(-1px);
}
.drop-zone-copy {
  display: grid;
  gap: 0.2rem;
}
.drop-zone-copy strong {
  font-size: 0.98rem;
}
.drop-zone-copy span {
  color: var(--muted);
  font-size: 0.88rem;
}
.file-input.compact {
  display: inline-flex;
}
.file-input.compact span {
  width: auto;
  white-space: nowrap;
  padding-inline: 1rem;
}
.source-preview-card {
  display: grid;
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.source-preview-header {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: baseline;
}
.source-preview-title {
  font-size: 0.9rem;
  font-weight: 600;
}
.source-preview-frame {
  min-height: 170px;
  display: grid;
  place-items: center;
  background: #0f141b;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  overflow: hidden;
  padding: 0.75rem;
}
#sourcePreview {
  display: block;
  max-width: 100%;
  max-height: 220px;
  height: auto;
  width: auto;
  border-radius: 8px;
}
.source-preview-placeholder {
  color: var(--muted);
  text-align: center;
  font-size: 0.9rem;
}
.preview-shell {
  position: relative;
  align-items: stretch;
}
.render-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 0.9rem;
  background: rgba(8, 11, 15, 0.72);
  backdrop-filter: blur(3px);
  z-index: 3;
  text-align: center;
  padding: 1rem;
}
.render-overlay-text {
  display: grid;
  gap: 0.3rem;
}
.render-overlay-text span {
  color: #d5deea;
}
.spinner {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 4px solid rgba(255,255,255,0.18);
  border-top-color: #ffffff;
  animation: spin 0.9s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.preview {
  width: 100%;
  min-height: calc(100vh - 140px);
  display: grid;
  place-items: center;
  padding: 1.5rem;
}
.preview svg {
  display: block;
  max-width: 100%;
  max-height: calc(100vh - 150px);
  width: auto;
  height: auto;
  background: white;
  box-shadow: 0 18px 48px rgba(0,0,0,0.35);
}


/* v1.7: ensure the render overlay actually hides when the hidden attribute is set. */
.render-overlay[hidden] {
  display: none !important;
}

/* v1.8: keep the SVG visible while rendering by turning the full overlay
   into a small floating progress badge. */
.render-overlay {
  inset: auto 1rem 1rem auto;
  place-items: end;
  align-content: end;
  justify-items: end;
  background: transparent;
  backdrop-filter: none;
  padding: 0;
  pointer-events: none;
}

.render-overlay-text {
  background: rgba(8, 11, 15, 0.86);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 0.6rem 0.8rem;
  max-width: min(28rem, 60vw);
  box-shadow: 0 10px 28px rgba(0,0,0,0.35);
}

.spinner {
  width: 30px;
  height: 30px;
}

/* v1.9 live-drawing polish */
.render-overlay-text strong { display:block; }
.render-overlay-text span { display:block; }


/* v1.10 advanced toggle */
.advanced-toggle {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 0.2rem 0.75rem 0.8rem;
  background: rgba(255,255,255,0.02);
}

.advanced-toggle > summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.45rem 0;
  user-select: none;
}

.advanced-content {
  padding-top: 0.35rem;
}

.subpanel + .subpanel {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.subpanel h3 {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
}


/* v1.11 UI cleanup */
:root {
  --panel-soft: rgba(255,255,255,0.03);
}

.topbar h1 {
  font-size: 1.18rem;
}

.layout {
  grid-template-columns: 460px 1fr;
}

.sidebar {
  padding: 1rem;
}

.panel {
  padding: 1rem 1rem 1.05rem;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.panel h2 {
  margin: 0;
  font-size: 1rem;
}

.panel-note {
  margin: 0.3rem 0 0;
  font-size: 0.86rem;
  color: var(--muted);
  line-height: 1.35;
}

.form-stack {
  display: grid;
  gap: 1rem;
}

.field-group {
  border: 1px solid rgba(255,255,255,0.06);
  background: var(--panel-soft);
  border-radius: 12px;
  padding: 0.9rem;
}

.field-group h3,
.subpanel h3 {
  margin: 0 0 0.8rem;
  font-size: 0.95rem;
}

.field-label {
  color: var(--muted);
  cursor: help;
  text-decoration: underline dotted rgba(155, 168, 187, 0.5);
  text-underline-offset: 0.16rem;
}

label {
  gap: 0.42rem;
}

input, select {
  padding: 0.62rem 0.7rem;
}

.checkbox {
  margin-bottom: 0.85rem;
}

.preset-row {
  margin-top: 0.8rem;
}

.advanced-toggle {
  padding: 0.3rem 0.8rem 0.85rem;
}

.advanced-toggle > summary {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.advanced-toggle > summary small {
  color: var(--muted);
  font-weight: 400;
}

.advanced-content {
  display: grid;
  gap: 1rem;
  padding-top: 0.55rem;
}

.subpanel {
  border: 1px solid rgba(255,255,255,0.06);
  background: var(--panel-soft);
  border-radius: 12px;
  padding: 0.9rem;
}

.subpanel + .subpanel {
  margin-top: 0;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}

#statsBox {
  min-height: 7.2rem;
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 400px 1fr;
  }
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

/* v1.12 advanced disclosure panels */
.advanced-subtoggle {
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  background: rgba(255,255,255,0.025);
  overflow: hidden;
}

.advanced-subtoggle > summary {
  display: grid;
  gap: 0.15rem;
  padding: 0.75rem 0.85rem;
  cursor: pointer;
  user-select: none;
}

.advanced-subtoggle > summary span {
  font-weight: 650;
}

.advanced-subtoggle > summary small {
  color: var(--muted);
  font-weight: 400;
}

.advanced-subtoggle[open] > summary {
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.025);
}

.subpanel.nested {
  border: 0;
  border-radius: 0;
  background: transparent;
  padding: 0.9rem;
}

.field-subgroup {
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.field-subgroup h4 {
  margin: 0 0 0.45rem;
  font-size: 0.88rem;
}

.inline-field {
  align-self: end;
  min-height: 2.65rem;
}


/* v1.13 branding */
.brand-block {
  display: flex;
  align-items: center;
  min-height: 52px;
}

.brand-logo {
  display: block;
  height: 46px;
  width: auto;
  max-width: min(320px, 42vw);
  object-fit: contain;
  border-radius: 6px;
}

@media (max-width: 700px) {
  .brand-logo {
    height: 36px;
    max-width: 58vw;
  }
}


/* v1.15 intro placeholder */
.intro-placeholder {
  width: min(760px, calc(100% - 2rem));
  color: var(--text);
  padding: 2rem;
}

.intro-card {
  background: rgba(15, 20, 27, 0.84);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  padding: clamp(1.2rem, 3vw, 2rem);
  box-shadow: 0 22px 56px rgba(0,0,0,0.32);
  text-align: left;
  line-height: 1.55;
}

.intro-card h2 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  letter-spacing: 0.01em;
}

.intro-card p {
  margin: 0.85rem 0 0;
  color: #dbe3ee;
}

.intro-card .pronunciation {
  margin-top: 0;
  color: var(--muted);
}

.intro-card .pronunciation strong {
  color: var(--text);
  font-weight: 650;
}

.intro-callout {
  border-left: 3px solid var(--accent);
  padding-left: 0.9rem;
  color: var(--text) !important;
  font-weight: 600;
}


/* v1.16 production polish */
.privacy-note {
  margin: 0.75rem 0 0;
  color: #c7d2e1;
  font-size: 0.86rem;
  line-height: 1.4;
  background: rgba(125, 184, 255, 0.08);
  border: 1px solid rgba(125, 184, 255, 0.18);
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
.drop-zone:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.preview-shell {
  min-height: calc(100vh - 108px);
}


/* v1.22 live drawing option */
.render-options {
  margin-top: 0.75rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  background: rgba(255,255,255,0.025);
}

.render-options .checkbox {
  margin: 0;
}