:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-alt: #0b1324;
  --border: #334155;
  --accent: #38bdf8;
  --accent-hover: #0ea5e9;
  --success: #22c55e;
  --success-hover: #16a34a;
  --warn: #f59e0b;
  --danger: #ef4444;
  --text: #f8fafc;
  --muted: #94a3b8;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: radial-gradient(circle at top, #1e293b 0%, #0f172a 70%);
  color: var(--text);
  min-height: 100vh;
  padding: 24px 16px 48px;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
}

header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.title-group h1 {
  margin: 0;
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}

.title-group p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.14);
  color: var(--accent);
  border: 1px solid rgba(56, 189, 248, 0.35);
}

.badge.ok {
  background: rgba(34, 197, 94, 0.14);
  color: #4ade80;
  border-color: rgba(34, 197, 94, 0.35);
}

.badge.err {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.4);
}

.layout {
  display: grid;
  grid-template-columns: 1fr 370px;
  gap: 20px;
  align-items: start;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
}

.card h2 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Dropzone */
.dropzone {
  border: 2px dashed #475569;
  border-radius: var(--radius);
  background: rgba(15, 23, 42, 0.55);
  padding: 20px;
  text-align: center;
  transition: all 0.18s ease;
  cursor: pointer;
  margin-bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
}

.dropzone-info {
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
}

.dropzone-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.14);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

.dropzone-text strong {
  display: block;
  font-size: 0.98rem;
  margin-bottom: 2px;
}

.dropzone-text span {
  color: var(--muted);
  font-size: 0.84rem;
}

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text);
  background: #334155;
}

.btn:hover:not(:disabled) {
  background: #475569;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #082f49;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  color: #fff;
}

.btn-success {
  background: var(--success);
  color: #052e16;
  width: 100%;
  padding: 13px 18px;
  font-size: 1rem;
}

.btn-success:hover:not(:disabled) {
  background: var(--success-hover);
  color: #fff;
}

.btn-sm {
  padding: 6px 11px;
  font-size: 0.8rem;
  border-radius: 6px;
}

.btn-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.btn-group .btn.active {
  background: var(--accent);
  color: #082f49;
}

/* Canvas workspace */
.canvas-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1024 / 600;
  background: #050811;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  user-select: none;
  touch-action: none;
}

canvas#editorCanvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

canvas#editorCanvas:active {
  cursor: grabbing;
}

.canvas-overlay-hint {
  position: absolute;
  bottom: 10px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
  font-size: 0.78rem;
  color: rgba(248, 250, 252, 0.85);
}

.pill {
  background: rgba(15, 23, 42, 0.78);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(148, 163, 184, 0.25);
  padding: 4px 9px;
  border-radius: 6px;
}

/* Controls */
.control-section {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.control-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.84rem;
  color: var(--muted);
  font-weight: 500;
}

.control-label strong {
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

.inline-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.input-box {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 7px 10px;
  color: var(--text);
  font-size: 0.88rem;
  width: 100%;
}

.color-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

input[type="color"] {
  appearance: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 38px;
  height: 32px;
  padding: 2px;
  background: var(--panel-alt);
  cursor: pointer;
}

/* Progress / Partition usage bar */
.meter-box {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}

.meter-bar {
  height: 8px;
  background: #1e293b;
  border-radius: 999px;
  overflow: hidden;
  margin: 7px 0 4px;
}

.meter-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--success));
  width: 0%;
  transition: width 0.2s ease;
}

.meter-fill.over {
  background: var(--danger);
}

.status-box {
  margin-top: 12px;
  padding: 11px 13px;
  border-radius: 8px;
  font-size: 0.84rem;
  line-height: 1.45;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  word-break: break-word;
}

.status-box.ok {
  border-color: rgba(34, 197, 94, 0.45);
  background: rgba(34, 197, 94, 0.09);
}

.status-box.err {
  border-color: rgba(239, 68, 68, 0.45);
  background: rgba(239, 68, 68, 0.1);
  color: #fca5a5;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.8rem;
}

.steps {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.55;
}

.steps li {
  margin-bottom: 4px;
}

.steps code {
  color: var(--accent);
  background: rgba(56, 189, 248, 0.1);
  padding: 1px 5px;
  border-radius: 4px;
}