@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Syne:wght@400;500;700&display=swap');

:root {
  --bg: #f7f4ef;
  --bg2: #eee9e0;
  --bg3: #e4ddd1;
  --surface: #fffdf9;
  --border: #c8bfb0;
  --border2: #b0a494;
  --text: #1c1814;
  --text2: #6b5e4e;
  --text3: #9c8e7e;
  --accent: #c45c1a;
  --accent2: #a84d12;
  --accent-bg: #fdf0e8;
  --green: #2d7a4f;
  --green-bg: #eaf4ee;
  --mono: 'DM Mono', monospace;
  --sans: 'Syne', sans-serif;
  --radius: 6px;
  --radius-lg: 10px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.5;
}

/* Layout */
.app-shell {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 100vh;
}

header {
  background: var(--text);
  color: var(--bg);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  border-bottom: 3px solid var(--accent);
}

header h1 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

header .version {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text3);
  background: rgba(255,255,255,0.08);
  padding: 3px 8px;
  border-radius: 3px;
}

.main {
  display: grid;
  grid-template-columns: 380px 1fr;
  height: calc(100vh - 56px);
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-inner {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sidebar-inner::-webkit-scrollbar { width: 4px; }
.sidebar-inner::-webkit-scrollbar-track { background: transparent; }
.sidebar-inner::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

/* Cards */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem;
}

.card-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: .875rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.card-title svg { flex-shrink: 0; }

/* Form elements */
label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text2);
  display: block;
  margin-bottom: 4px;
}

input[type=number], input[type=text] {
  width: 100%;
  height: 36px;
  padding: 0 10px;
  font-family: var(--mono);
  font-size: 13px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}

input[type=number]:focus, input[type=text]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(196,92,26,0.12);
}

.field-row {
  display: grid;
  gap: 10px;
}

.field-row-2 { grid-template-columns: 1fr 1fr; }
.field-row-3 { grid-template-columns: 1fr 1fr 72px; }
.field-row-4 { grid-template-columns: 2fr 1fr 1fr 52px; }

/* Toggle */
.toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
}

.toggle-label {
  font-size: 13px;
  color: var(--text2);
  flex: 1;
}

.toggle {
  position: relative;
  width: 38px;
  height: 21px;
  flex-shrink: 0;
}

.toggle input { opacity: 0; width: 0; height: 0; }

.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 11px;
  cursor: pointer;
  transition: background .2s;
}

.toggle-track::before {
  content: '';
  position: absolute;
  width: 15px;
  height: 15px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  transition: transform .2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.toggle input:checked + .toggle-track { background: var(--accent); }
.toggle input:checked + .toggle-track::before { transform: translateX(17px); }

/* Buttons */
button {
  font-family: var(--sans);
  cursor: pointer;
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  transition: all .15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-primary {
  background: var(--accent);
  color: white;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  width: 100%;
  height: 44px;
  border-radius: var(--radius-lg);
}

.btn-primary:hover { background: var(--accent2); }
.btn-primary:active { transform: scale(0.98); }

.btn-ghost {
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border);
  padding: 7px 12px;
  font-size: 12px;
}

.btn-ghost:hover { background: var(--bg2); border-color: var(--border2); }

.btn-danger {
  background: transparent;
  color: #b94040;
  border: 1px solid #e0b0b0;
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: var(--radius);
}

.btn-danger:hover { background: #fef2f2; }

.btn-icon {
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border);
  width: 32px;
  height: 32px;
  padding: 0;
}

.btn-icon:hover { background: var(--bg2); }

/* Cut list */
.cut-list-header {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 52px;
  gap: 8px;
  padding: 0 0 6px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.cut-list-header span {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text3);
}

#cut-rows {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cut-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 32px;
  gap: 6px;
  align-items: center;
  animation: slideIn .15s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.cut-row .color-dot {
  width: 8px;
  height: 100%;
  border-radius: 2px 0 0 2px;
}

.cut-row input[type=text] { font-family: var(--sans); font-size: 12px; }
.cut-row input[type=number] { font-size: 12px; }

/* CSV drop zone */
.drop-zone {
  border: 1.5px dashed var(--border2);
  border-radius: var(--radius-lg);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  background: var(--bg);
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-bg);
}

.drop-zone-text {
  font-size: 12px;
  color: var(--text3);
  line-height: 1.6;
}

.drop-zone-text strong {
  color: var(--accent);
  font-weight: 500;
}

/* Content area */
.content {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg2);
}

.content-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: .875rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-shrink: 0;
}

.metrics-bar {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.metric {
  text-align: center;
}

.metric-val {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 500;
  color: var(--text);
  line-height: 1;
}

.metric-lbl {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text3);
  margin-top: 2px;
}

.metric-divider {
  width: 1px;
  height: 32px;
  background: var(--border);
}

.content-actions {
  display: flex;
  gap: 8px;
}

/* Sheet tabs */
.sheet-tabs {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  display: flex;
  gap: 2px;
  overflow-x: auto;
  flex-shrink: 0;
}

.sheet-tabs::-webkit-scrollbar { height: 3px; }
.sheet-tabs::-webkit-scrollbar-thumb { background: var(--border); }

.sheet-tab {
  padding: 10px 16px 9px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text3);
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
  border-radius: 0;
  transition: all .15s;
  font-family: var(--sans);
}

.sheet-tab:hover { color: var(--text2); background: var(--bg2); }
.sheet-tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 700; }

/* Canvas area */
.canvas-area {
  flex: 1;
  overflow: auto;
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.canvas-wrap {
  background: white;
  box-shadow: 0 2px 12px rgba(0,0,0,0.10), 0 1px 3px rgba(0,0,0,0.06);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: inline-block;
}

#layout-canvas {
  display: block;
}

/* Empty state */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text3);
  text-align: center;
  padding: 2rem;
}

.empty-state svg {
  opacity: 0.3;
}

.empty-state h2 {
  font-size: 16px;
  font-weight: 500;
  color: var(--text2);
}

.empty-state p {
  font-size: 13px;
  max-width: 260px;
  line-height: 1.6;
}

/* Legend */
.legend {
  padding: .75rem 1.5rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  flex-shrink: 0;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text2);
}

.legend-swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--text);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: var(--radius-lg);
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  transform: translateY(8px);
  transition: all .25s;
  pointer-events: none;
  z-index: 999;
  border-left: 3px solid var(--accent);
}

.toast.show { opacity: 1; transform: translateY(0); }

/* Utility badge */
.util-badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 3px;
  font-weight: 500;
}

.util-good { background: var(--green-bg); color: var(--green); }
.util-ok { background: #fef9ec; color: #8a6300; }
.util-low { background: #fef2f2; color: #b94040; }

/* Hidden file input */
#csv-input { display: none; }