:root {
  --mosaic-bg: #f4efe7;
  --mosaic-ink: #1c2430;
  --mosaic-muted: #667085;
  --mosaic-line: rgba(28, 36, 48, 0.12);
  --mosaic-card: rgba(255, 255, 255, 0.84);
  --mosaic-accent: #c9522f;
  --mosaic-accent-soft: rgba(201, 82, 47, 0.12);
  --mosaic-ok: #177245;
  --mosaic-warn: #9a6700;
  --mosaic-error: #bf3d3d;
  --mosaic-shadow: 0 24px 60px rgba(30, 26, 21, 0.12);
}

body {
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(201, 82, 47, 0.12), transparent 30%),
    radial-gradient(circle at bottom right, rgba(25, 89, 118, 0.12), transparent 28%),
    var(--mosaic-bg);
  color: var(--mosaic-ink);
}

.mosaic-shell {
  padding: 40px 0 56px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.9fr);
  gap: 24px;
  margin-bottom: 28px;
}

.hero-copy,
.hero-note,
.control-panel,
.preview-panel {
  border: 1px solid var(--mosaic-line);
  border-radius: 28px;
  background: var(--mosaic-card);
  backdrop-filter: blur(18px);
  box-shadow: var(--mosaic-shadow);
}

.hero-copy {
  padding: 32px;
}

.hero-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.22em;
  font-weight: 800;
  color: var(--mosaic-accent);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid rgba(28, 36, 48, 0.12);
  background: rgba(255, 255, 255, 0.78);
  color: var(--mosaic-muted);
  font-size: 0.88rem;
}

.lang-switch select {
  border: none;
  background: transparent;
  font: inherit;
  color: var(--mosaic-ink);
  outline: none;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 3.8vw, 3.8rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.hero-text,
.helper-text {
  margin: 0;
  color: var(--mosaic-muted);
  line-height: 1.8;
}

.hero-note {
  padding: 28px;
}

.hero-note p {
  margin: 0 0 14px;
  font-weight: 700;
}

.hero-note ol {
  margin: 0;
  padding-left: 20px;
  color: var(--mosaic-muted);
  line-height: 1.9;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 360px) minmax(0, 1fr);
  gap: 24px;
}

.control-panel {
  padding: 20px;
}

.panel-section + .panel-section {
  margin-top: 18px;
}

.panel-section {
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(28, 36, 48, 0.08);
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.section-head h2,
.preview-header h2 {
  margin: 0;
  font-size: 1.05rem;
}

.upload-card {
  display: grid;
  gap: 8px;
  padding: 22px;
  margin-bottom: 18px;
  border-radius: 22px;
  border: 1px dashed rgba(28, 36, 48, 0.22);
  background: linear-gradient(135deg, rgba(201, 82, 47, 0.12), rgba(255, 255, 255, 0.88));
  cursor: pointer;
}

.upload-card input {
  display: none;
}

.upload-title {
  font-size: 1.05rem;
  font-weight: 700;
}

.upload-subtitle {
  color: var(--mosaic-muted);
  font-size: 0.95rem;
}

.field {
  display: grid;
  gap: 8px;
}

.field + .field {
  margin-top: 14px;
}

.field span {
  font-size: 0.92rem;
  font-weight: 600;
}

.field input[type="range"] {
  width: 100%;
}

.field input[type="email"] {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(28, 36, 48, 0.14);
  background: rgba(255, 255, 255, 0.86);
  color: var(--mosaic-ink);
  font: inherit;
}

.field output {
  color: var(--mosaic-muted);
  font-size: 0.88rem;
}

.button-row {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

button {
  appearance: none;
  border: none;
  cursor: pointer;
  font: inherit;
}

.primary-button,
.ghost-button {
  border-radius: 999px;
  transition: transform 0.15s ease, opacity 0.15s ease, background 0.15s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.primary-button {
  padding: 12px 18px;
  background: var(--mosaic-accent);
  color: #fff;
  font-weight: 700;
}

.ghost-button {
  padding: 12px 18px;
  background: rgba(28, 36, 48, 0.06);
  color: var(--mosaic-ink);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

button:not(:disabled):hover {
  transform: translateY(-1px);
}

.count-pill {
  min-width: 34px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--mosaic-accent-soft);
  color: var(--mosaic-accent);
  font-size: 0.84rem;
  font-weight: 700;
  text-align: center;
}

.region-list {
  display: grid;
  gap: 10px;
}

.region-item {
  display: grid;
  gap: 4px;
  width: 100%;
  padding: 14px;
  border-radius: 18px;
  text-align: left;
  border: 1px solid rgba(28, 36, 48, 0.08);
  background: rgba(255, 255, 255, 0.72);
}

.region-item.is-active {
  border-color: rgba(201, 82, 47, 0.38);
  background: rgba(201, 82, 47, 0.1);
}

.region-item strong {
  font-size: 0.94rem;
}

.region-item span {
  color: var(--mosaic-muted);
  font-size: 0.84rem;
}

.status-ok {
  color: var(--mosaic-ok);
}

.status-warn {
  color: var(--mosaic-warn);
}

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

.preview-panel {
  padding: 20px;
}

.preview-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.canvas-stage {
  position: relative;
  min-height: 480px;
  border-radius: 28px;
  border: 1px solid rgba(28, 36, 48, 0.08);
  background:
    linear-gradient(45deg, rgba(28, 36, 48, 0.04) 25%, transparent 25%, transparent 75%, rgba(28, 36, 48, 0.04) 75%),
    linear-gradient(45deg, rgba(28, 36, 48, 0.04) 25%, transparent 25%, transparent 75%, rgba(28, 36, 48, 0.04) 75%);
  background-size: 22px 22px;
  background-position: 0 0, 11px 11px;
  overflow: hidden;
}

.canvas-stage.is-empty {
  display: grid;
  place-items: center;
}

#previewCanvas {
  display: block;
  width: 100%;
  height: auto;
}

.empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  text-align: center;
  color: var(--mosaic-muted);
}

.result-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.result-card {
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(28, 36, 48, 0.08);
}

.result-label {
  display: block;
  margin-bottom: 6px;
  color: var(--mosaic-muted);
  font-size: 0.8rem;
}

.result-card strong {
  font-size: 1rem;
}

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

  .canvas-stage {
    min-height: 360px;
  }
}

@media (max-width: 640px) {
  .mosaic-shell {
    padding-top: 20px;
  }

  .hero-copy,
  .hero-note,
  .control-panel,
  .preview-panel {
    border-radius: 24px;
  }

  .hero-copy,
  .hero-note,
  .control-panel,
  .preview-panel,
  .panel-section {
    padding: 18px;
  }

  .hero-topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .preview-header,
  .button-row,
  .result-meta {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .button-row {
    display: grid;
  }

  .canvas-stage {
    min-height: 280px;
    border-radius: 22px;
  }
}