:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --ink: #000000;
  --muted: #3f3f3f;
  --line: #000000;
  --accent: #000000;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
}

.app {
  max-width: 1320px;
  margin: 0 auto;
  padding: 1rem 0.85rem 1.4rem;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  grid-template-areas:
    "title controls"
    "subtitle controls"
    "preview controls"
    "charset controls"
    "export controls"
    "status status";
  gap: 0.65rem 0.9rem;
  align-items: start;
}

h1 {
  margin: 0;
  font-size: clamp(1.2rem, 2.8vw, 1.7rem);
}

.sub {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.sub-invert {
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.controls {
  display: grid;
  gap: 1rem;
  padding: 0.72rem;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 14px;
  max-height: calc(100vh - 2rem);
  overflow: auto;
}

.control-group {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem;
}

.control-group h2 {
  margin: 0 0 0.42rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.55rem;
}

.effects-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
}

.effect-col {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.45rem;
  display: grid;
  gap: 0.45rem;
}

.effect-col h3 {
  margin: 0;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.controls label {
  display: grid;
  gap: 0.25rem;
  font-size: 0.84rem;
}

.wide-action {
  width: 100%;
}

.action-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}

input[type="text"],
select,
input[type="file"] {
  width: 100%;
  padding: 0.42rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  background: #ffffff;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

button {
  border: 1px solid var(--accent);
  background: #000000;
  color: #fff;
  border-radius: 8px;
  padding: 0.5rem 0.62rem;
  font: inherit;
  cursor: pointer;
  align-self: end;
}

button:hover {
  background: #1a1a1a;
}

button:disabled {
  background: #5c5c5c;
  border-color: #5c5c5c;
  cursor: not-allowed;
}

.preview {
  margin-top: 0;
  padding: 0.6rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #000000;
}

.charset-preview {
  margin-top: 0;
}

.export {
  margin-top: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 0.65rem;
}

.export-name {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
  min-width: 220px;
}

.export-name input {
  width: 100%;
}

svg {
  width: 100%;
  height: auto;
  display: block;
}

.modifiedPath {
  fill: #ffffff;
}

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

.app-title {
  grid-area: title;
}

.app-sub {
  grid-area: subtitle;
}

.controls-panel {
  grid-area: controls;
}

.main-preview {
  grid-area: preview;
  position: sticky;
  top: 0.6rem;
  z-index: 2;
}

.charset-preview {
  grid-area: charset;
}

.export-bar {
  grid-area: export;
}

.status-bar {
  grid-area: status;
}

@media (max-width: 680px) {
  .effects-split {
    grid-template-columns: 1fr;
  }

  .app {
    display: block;
    max-width: 1050px;
    padding: 1rem 0.75rem 1.2rem;
  }

  .controls {
    max-height: none;
    overflow: visible;
    margin-top: 0.8rem;
  }

  .main-preview {
    position: static;
    margin-top: 0.8rem;
  }

  .charset-preview,
  .export,
  .status {
    margin-top: 0.8rem;
  }
}