:root {
  --bg: #0d0b1f;
  --bg-elev: #15122b;
  --bg-card: #1b1833;
  --text: #f6f9f1;
  --text-muted: #a6a3b8;
  --accent: #6cf8c3;
  --accent-2: #ff8ac1;
  --accent-gradient: linear-gradient(90deg, var(--accent), var(--accent-2));
  --danger: #ff6b6b;
  --warning-bg: rgba(255, 193, 7, 0.12);
  --warning-border: rgba(255, 193, 7, 0.45);
  --border: rgba(255, 255, 255, 0.1);
  --radius: 18px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: rgba(13, 11, 31, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.logo {
  margin: 0;
  font-family: 'Dela Gothic One', sans-serif;
  font-size: 1.6rem;
  letter-spacing: 0.02em;
}

.logo__accent {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo__mascot {
  margin-left: 0.25rem;
  color: var(--accent);
}

.lang-switcher {
  display: flex;
  gap: 0.35rem;
  padding: 0.25rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.lang-btn {
  padding: 0.4rem 0.75rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: 0.15s;
}

.lang-btn.is-active,
.lang-btn:hover {
  background: var(--accent-gradient);
  color: #0d0b1f;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.panel {
  margin-bottom: 2rem;
}

.panel__title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: 'Dela Gothic One', sans-serif;
  font-size: 1.35rem;
  margin: 0 0 0.4rem;
}

.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: 2px solid var(--accent);
  color: var(--accent);
  border-radius: 50%;
  font-size: 1rem;
  font-family: 'Inter', sans-serif;
  font-weight: 700;
}

.panel__hint {
  color: var(--text-muted);
  margin: 0 0 1rem;
  font-size: 0.95rem;
}

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 160px;
  padding: 1.5rem;
  text-align: center;
  border: 2px dashed var(--accent);
  border-radius: var(--radius);
  background: var(--bg-elev);
  cursor: pointer;
  transition: 0.15s;
}

.dropzone:hover,
.dropzone.is-dragover {
  background: rgba(108, 248, 195, 0.08);
}

.dropzone span:first-child {
  font-weight: 600;
}

.dropzone__hint {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.editor-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 1.25rem;
}

@media (max-width: 880px) {
  .editor-layout {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.card--canvas {
  height: 100%;
  min-height: 420px;
  display: flex;
  flex-direction: column;
}

.card__title {
  margin: 0 0 0.75rem;
  font-family: 'DotGothic16', sans-serif;
  font-size: 1rem;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.card__title::before {
  content: '•••';
  letter-spacing: 0.15em;
  color: var(--accent-2);
}

.card__desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0.5rem 0 0;
}

.select {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
}

.select:focus {
  border-color: var(--accent);
}

.brush-modes {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.mode-btn {
  flex: 1;
  padding: 0.55rem 0.4rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elev);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  transition: 0.15s;
}

.mode-btn.is-active,
.mode-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(108, 248, 195, 0.1);
}

.range-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  margin: 0.75rem 0 0.35rem;
  color: var(--text-muted);
}

.range-label span:last-child {
  color: var(--accent);
  font-weight: 700;
}

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

.editor-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  transition: 0.15s;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--ghost:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.btn--primary {
  background: var(--accent-gradient);
  border: 0;
  color: #0d0b1f;
}

.btn--primary:hover {
  filter: brightness(1.08);
}

.btn--large {
  padding: 0.85rem 1.6rem;
  font-size: 1rem;
  margin-top: 1rem;
}

.check-row {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin: 0.5rem 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  cursor: pointer;
}

.check-row input {
  margin-top: 0.15rem;
  accent-color: var(--accent);
  width: 1rem;
  height: 1rem;
}

.canvas-scroll {
  flex: 1;
  overflow: auto;
  margin-top: 0.75rem;
  border-radius: 14px;
  background: repeating-conic-gradient(#2a2642 0% 25%, #1e1b36 0% 50%) 50% / 20px 20px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.editor-canvas {
  display: block;
  max-width: 100%;
  touch-action: none;
  cursor: crosshair;
}

.preview-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.preview-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.theme-toggle {
  display: flex;
  gap: 0.4rem;
  padding: 0.25rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.theme-btn {
  padding: 0.35rem 0.8rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
}

.theme-btn.is-active {
  background: var(--accent-gradient);
  color: #0d0b1f;
}

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

.preview-cell {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #ffffff;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-cell--black {
  background: #000000;
}

.preview-cell canvas {
  max-width: 100%;
  max-height: 100%;
  display: block;
}

.preview-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}

.warning-box {
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  border-radius: 12px;
  padding: 0.85rem 1rem;
  font-size: 0.88rem;
  color: #ffe082;
  line-height: 1.5;
}

.site-footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

.toast {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.9rem 1.25rem;
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 0.9rem;
  opacity: 0;
  transition: transform 0.25s, opacity 0.25s;
  z-index: 200;
  max-width: min(520px, 90vw);
  text-align: center;
}

.toast.is-visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

@media (max-width: 640px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .logo {
    font-size: 1.3rem;
  }

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

  .preview-cell {
    aspect-ratio: auto;
    min-height: 220px;
  }
}