:root {
  --bg: #0f1117;
  --bg-card: #181b24;
  --border: #2a2d3a;
  --text: #e8eaf0;
  --text-muted: #6b7280;
  --text-dim: #9ca3af;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --prime-color: #f59e0b;
  --prime-bg: rgba(245, 158, 11, 0.12);
  --prime-border: rgba(245, 158, 11, 0.35);
  --unit-color: #6b7280;
  --unit-bg: rgba(107, 114, 128, 0.1);
}

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

html, body, .page {
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
}

.page {
  display: flex;
  flex-direction: column;
}

/* ── Topbar ─────────────────────────────────────────────────────────────────── */

.topbar {
  flex-shrink: 0;
  padding: 24px 40px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  gap: 28px;
}

.back-btn {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  padding-top: 4px;
  transition: color 0.15s;
}
.back-btn:hover { color: var(--accent-light); }

.title-wrap h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}
.title-wrap p {
  margin-top: 5px;
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 580px;
}
.title-wrap p em { color: var(--accent-light); font-style: normal; font-weight: 600; }

/* ── Global controls ─────────────────────────────────────────────────────────── */

.controls-bar {
  flex-shrink: 0;
  padding: 12px 40px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  gap: 24px;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-dim);
  font-size: 0.875rem;
}

.control-group input[type="range"] {
  width: 180px;
  accent-color: var(--accent);
  cursor: pointer;
}

.control-group strong {
  font-variant-numeric: tabular-nums;
  color: var(--text);
  min-width: 2.5rem;
}

.add-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 7px 18px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}
.add-btn:hover { opacity: 0.85; }

/* ── Panels container ────────────────────────────────────────────────────────── */

.panels-container {
  flex: 1;
  display: flex;
  flex-direction: row;
  overflow-x: auto;
  min-height: 0;
}

/* ── Single panel ────────────────────────────────────────────────────────────── */

.panel {
  flex: 1;
  min-width: 340px;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  overflow: hidden;
}
.panel:last-child { border-right: none; }

.panel-header {
  flex-shrink: 0;
  padding: 10px 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mod-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mod-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
}

.mod-input {
  width: 64px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  padding: 4px 6px;
  font-variant-numeric: tabular-nums;
}
.base-input {
  width: 64px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  padding: 4px 6px;
  font-variant-numeric: tabular-nums;
}
.base-input:focus { outline: none; border-color: var(--accent); }
.mod-input:focus { outline: none; border-color: var(--accent); }

.panel-close {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, border-color 0.15s;
}
.panel-close:hover:not(:disabled) { color: var(--text); border-color: var(--text-muted); }
.panel-close:disabled { opacity: 0.25; cursor: default; }

.panel-stats {
  flex-shrink: 0;
  padding: 6px 16px;
  font-size: 0.75rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}

.panel-numbers {
  flex: 1;
  overflow-y: auto;
  padding: 0 16px 60px;
}

/* ── Number rows ─────────────────────────────────────────────────────────────── */

.number-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.num-label {
  width: 48px;
  min-width: 48px;
  font-size: 1rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
  text-align: right;
  padding-top: 5px;
  letter-spacing: -0.02em;
}
.num-main { font-size: 1rem; }
.num-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.compositions {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex: 1;
  min-width: 0;
}

.comp-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3px;
}

/* ── Chips ───────────────────────────────────────────────────────────────────── */

.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  padding: 0 6px;
  border-radius: 5px;
  border: 1.5px solid transparent;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0,0,0,0.4);
  user-select: none;
}

.chip-more {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 6px;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
}

.chip-rem {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 7px;
  border-radius: 5px;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.35);
  color: var(--accent-light);
  font-size: 0.75rem;
  font-weight: 700;
}

.comp-summary {
  color: var(--text-muted);
  font-size: 0.72rem;
  margin-left: 4px;
  font-variant-numeric: tabular-nums;
  align-self: center;
}

/* ── Badges ──────────────────────────────────────────────────────────────────── */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.prime-badge {
  background: var(--prime-bg);
  border: 1px solid var(--prime-border);
  color: var(--prime-color);
}

.unit-badge {
  background: var(--unit-bg);
  border: 1px solid rgba(107, 114, 128, 0.2);
  color: var(--unit-color);
}