:root {
  --bg: #eef0ff;
  --card: #ffffff;
  --card-soft: #f5f6ff;
  --ink: #151b33;
  --muted: #66708c;
  --line: #dfe4fb;
  --blue: #4f63ff;
  --blue-dark: #3045c7;
  --violet: #a796ff;
  --danger: #b33a56;
  --danger-bg: #fff0f4;
  --dark: #090d25;
  --shadow: 0 22px 60px rgba(30, 43, 100, 0.10);
  --radius-xl: 26px;
  --radius-lg: 18px;
  --radius-md: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(167, 150, 255, 0.28), transparent 34rem),
    linear-gradient(135deg, #f7f8ff 0%, var(--bg) 100%);
}

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

.page-shell {
  width: min(1720px, calc(100% - 56px));
  margin: 0 auto;
  padding: 34px 0 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.hero-card,
.info-card,
.quick-card,
.panel {
  background: rgba(255, 255, 255, 0.93);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 48px;
  min-height: 300px;
}

.info-card {
  padding: 42px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.quick-card {
  padding: 30px 34px;
  margin-bottom: 32px;
}

.quick-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 18px;
}

.quick-steps span {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #f8f9ff;
  color: #303852;
  font-weight: 800;
  line-height: 1.35;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 12px 18px;
  border: 1px solid #d8defa;
  border-radius: 999px;
  background: #f3f5ff;
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.22em;
}

h1 {
  margin: 30px 0 20px;
  max-width: 900px;
  font-size: clamp(42px, 5vw, 74px);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

h2 {
  margin: 0 0 8px;
  font-size: 30px;
  line-height: 1.05;
  letter-spacing: -0.035em;
}

h3 {
  margin: 0 0 12px;
  font-size: 16px;
  letter-spacing: 0.02em;
}

p {
  margin: 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.55;
}

code {
  padding: 2px 7px;
  border: 1px solid #dce2fa;
  border-radius: 8px;
  background: #f5f7ff;
  color: #1d2747;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.small-note {
  margin-top: 16px;
  font-size: 15px;
}

.flow-box {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 22px 0 2px;
}

.flow-box span {
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f8f9ff;
  font-weight: 900;
}

.flow-box b {
  color: var(--blue-dark);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.hero-actions span {
  padding: 13px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  font-weight: 800;
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.panel {
  padding: 32px;
}

.output-panel {
  min-height: 500px;
}

.panel-header {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.step {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  color: white;
  font-size: 18px;
  font-weight: 900;
}

.upload-box {
  display: grid;
  place-items: center;
  min-height: 170px;
  padding: 26px;
  border: 2px dashed #cfd7fb;
  border-radius: var(--radius-lg);
  background: #f8f9ff;
  cursor: pointer;
  text-align: center;
  transition: 0.18s ease;
}

.upload-box:hover {
  border-color: var(--blue);
  transform: translateY(-1px);
}

.upload-box input {
  display: none;
}

.upload-title {
  display: block;
  font-size: 22px;
  font-weight: 900;
}

.upload-subtitle {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-weight: 700;
}

.status-box {
  margin-top: 20px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #f8f9ff;
  color: #53607f;
  font-weight: 800;
  line-height: 1.45;
}

.status-box.muted {
  color: var(--muted);
}

.status-box.error {
  border-color: #ffc7d4;
  background: var(--danger-bg);
  color: var(--danger);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

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

.custom-size {
  margin-top: 18px;
}

.top-gap {
  margin-top: 18px;
}

label {
  display: grid;
  gap: 8px;
  color: #222a48;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.field-help {
  color: var(--muted);
  font-size: 14px;
  font-weight: 750;
  letter-spacing: 0;
  line-height: 1.35;
}

input[type="text"],
input[type="number"],
input[type="color"],
select {
  width: 100%;
  min-height: 52px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--ink);
  outline: none;
  font-weight: 750;
}

input[type="color"] {
  padding: 6px;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(79, 99, 255, 0.13);
}

.advanced-box {
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #f8f9ff;
  overflow: hidden;
}

.advanced-box summary {
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 950;
  color: #303852;
}

.advanced-box[open] summary {
  border-bottom: 1px solid var(--line);
}

.advanced-grid {
  padding: 20px;
}

.checks {
  display: grid;
  gap: 12px;
  padding: 0 20px 20px;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  letter-spacing: 0;
  font-size: 16px;
  color: var(--muted);
}

.check-row input {
  width: 18px;
  height: 18px;
}

.primary-btn,
.secondary-btn {
  border: 0;
  border-radius: var(--radius-md);
  min-height: 56px;
  padding: 0 24px;
  cursor: pointer;
  font-weight: 950;
  transition: 0.16s ease;
}

.primary-btn {
  width: 100%;
  margin-top: 24px;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  color: white;
  box-shadow: 0 12px 28px rgba(79, 99, 255, 0.24);
}

.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-1px);
}

.secondary-btn {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.preview-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--card-soft);
}

canvas {
  width: 100%;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  display: block;
  border-radius: var(--radius-md);
  background:
    linear-gradient(45deg, #e8ebfa 25%, transparent 25%),
    linear-gradient(-45deg, #e8ebfa 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e8ebfa 75%),
    linear-gradient(-45deg, transparent 75%, #e8ebfa 75%);
  background-size: 22px 22px;
  background-position: 0 0, 0 11px, 11px -11px, -11px 0;
  image-rendering: pixelated;
}

.hint-box {
  margin-top: 18px;
  padding: 18px;
  border-radius: var(--radius-md);
  background: #101633;
  color: #dbe2ff;
  line-height: 1.55;
  font-weight: 750;
}

.hint-box b {
  color: white;
}

.output-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.download-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #f8f9ff, #ffffff);
}

.file-icon {
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background: var(--dark);
  color: #ffffff;
  font-size: 22px;
  font-weight: 950;
  letter-spacing: -0.04em;
}

.file-main h3 {
  margin: 0 0 6px;
  font-size: 22px;
  letter-spacing: -0.03em;
}

.file-main p {
  font-size: 16px;
}

.file-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 18px 0;
}

.file-details div {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #f8f9ff;
}

.file-details span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.file-details b {
  display: block;
  overflow-wrap: anywhere;
  color: var(--ink);
  font-size: 17px;
}

.download-btn {
  width: 100%;
  min-height: 68px;
  border: 0;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--blue), var(--violet));
  color: white;
  box-shadow: 0 12px 28px rgba(79, 99, 255, 0.24);
  cursor: pointer;
  font-weight: 950;
  font-size: 18px;
  transition: 0.16s ease;
}

.download-btn:hover {
  transform: translateY(-1px);
}

.code-preview-box {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #f8f9ff;
  overflow: hidden;
}

.code-preview-box summary {
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 950;
  color: #303852;
}

.code-preview-box p {
  padding: 0 20px 14px;
  font-size: 15px;
}

.copy-inside {
  margin: 0 20px 16px;
}

textarea {
  width: 100%;
  min-height: 300px;
  resize: vertical;
  padding: 22px;
  border: 1px solid #151b36;
  border-radius: var(--radius-lg);
  background: var(--dark);
  color: #f5f7ff;
  outline: none;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  line-height: 1.55;
  white-space: pre;
}

.embed-block {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 30px;
  background: var(--bg);
  text-align: center;
}

.embed-block h1 {
  margin: 0 0 16px;
  font-size: clamp(32px, 5vw, 62px);
}

.hidden,
.hidden-soft {
  display: none;
}

@media (max-width: 1050px) {
  .hero-grid,
  .tool-grid,
  .quick-steps {
    grid-template-columns: 1fr;
  }

  .hero-card {
    padding: 36px;
  }
}

@media (max-width: 680px) {
  .page-shell {
    width: min(100% - 28px, 1720px);
    padding-top: 18px;
  }

  .hero-card,
  .info-card,
  .quick-card,
  .panel {
    border-radius: 20px;
    padding: 24px;
  }

  .form-grid,
  .preview-grid,
  .file-details {
    grid-template-columns: 1fr;
  }

  .output-actions,
  .hero-actions {
    flex-direction: column;
  }

  h1 {
    font-size: 42px;
  }
}

.wide-check {
  grid-column: 1 / -1;
  align-self: center;
  margin: 0 0 4px;
}