:root {
  --bg: #0b1020;
  --panel: rgba(19, 27, 48, .88);
  --panel-soft: rgba(30, 41, 70, .72);
  --line: rgba(157, 177, 226, .16);
  --text: #edf2ff;
  --muted: #8997b8;
  --accent: #8b7cff;
  --accent-2: #4ed9d0;
  --shadow: 0 20px 60px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); }
body {
  color: var(--text);
  font: 13px/1.45 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
button, input, select { font: inherit; }
button { color: inherit; }
.app-shell { min-height: 100vh; position: relative; isolation: isolate; background: radial-gradient(circle at 50% -20%, #273766 0, transparent 43%), #0b1020; }
.ambient { position: fixed; z-index: -1; width: 360px; height: 360px; border-radius: 50%; filter: blur(80px); opacity: .18; pointer-events: none; }
.ambient-one { top: 8%; left: 18%; background: #7164ff; }
.ambient-two { right: 9%; bottom: 3%; background: #2ac8be; }
.wrapper { display: grid; grid-template-columns: 70px minmax(0, 1fr) 260px; grid-template-rows: 58px minmax(0, 1fr); height: 100vh; padding: 14px; gap: 10px; }
.main_menu { grid-column: 1 / -1; grid-row: 1; display: flex; align-items: center; min-width: 0; padding-left: 12px; border: 1px solid var(--line); border-radius: 16px; background: rgba(13, 19, 36, .72); box-shadow: var(--shadow); backdrop-filter: blur(18px); }
.submenu { grid-column: 2 / 4; grid-row: 1; z-index: 3; display: flex; align-items: center; gap: 14px; min-width: 0; padding: 0 14px 0 24px; pointer-events: none; }
.submenu > * { pointer-events: auto; }
.logo { display: inline-flex; align-items: center; gap: 8px; color: var(--text); font-size: 17px; font-weight: 800; letter-spacing: -.04em; text-decoration: none; white-space: nowrap; }
.logo > span:not(.logo-mark) { color: var(--accent-2); }
.logo-mark { display: grid; width: 28px; height: 28px; place-items: center; color: #fff; font-size: 14px; border-radius: 9px; background: linear-gradient(135deg, var(--accent), #c775ff); box-shadow: 0 7px 20px rgba(139,124,255,.35); }
.attributes { flex: 1; min-width: 0; }
.undo_button { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel-soft); transition: .2s ease; }
.undo_button:hover { border-color: var(--accent); background: rgba(139,124,255,.2); transform: translateY(-1px); }
.sidebar_left, .sidebar_right { min-height: 0; border: 1px solid var(--line); background: var(--panel); box-shadow: var(--shadow); backdrop-filter: blur(18px); }
.sidebar_left { grid-column: 1; grid-row: 2; border-radius: 16px; overflow: hidden; }
.sidebar_right { grid-column: 3; grid-row: 2; border-radius: 16px; padding: 10px; overflow: auto; scrollbar-width: thin; }
.middle_area { grid-column: 2; grid-row: 2; position: relative; min-width: 0; min-height: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: rgba(9, 14, 28, .67); box-shadow: var(--shadow); }
.main_wrapper { position: absolute; inset: 26px; overflow: auto; display: grid; place-items: center; border: 1px solid rgba(157,177,226,.1); border-radius: 12px; background: radial-gradient(circle, rgba(59,76,121,.17), transparent 68%); }
.canvas_wrapper { box-shadow: 0 25px 80px rgba(0,0,0,.45); }
.block { margin-bottom: 10px; padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: rgba(29, 39, 66, .64); }
.block:last-child { margin-bottom: 0; }
.block h2 { display: flex; align-items: center; justify-content: space-between; margin: 0 0 10px; color: #cbd6f3; font-size: 11px; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
.toggle { cursor: pointer; transition: color .2s ease; }
.toggle:hover { color: var(--accent-2); }
.content { color: var(--muted); }
.sidebar_left button, .sidebar_left a, .sidebar_right button { transition: background .18s ease, color .18s ease, border-color .18s ease, transform .18s ease; }
.sidebar_left button:hover, .sidebar_left a:hover { color: #fff; background: rgba(139,124,255,.2); }
.transparent-grid { opacity: .55; }
.mobile_menu { display: none; }
.sr_only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.hidden { display: none !important; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { border: 2px solid transparent; border-radius: 99px; background: #344365; background-clip: padding-box; }

@media (max-width: 800px) {
  body { overflow: auto; }
  .wrapper { grid-template-columns: 58px minmax(0, 1fr); grid-template-rows: 58px minmax(480px, 1fr); min-height: 100vh; height: auto; padding: 8px; }
  .main_menu { grid-column: 1 / -1; }
  .submenu { grid-column: 2; padding-left: 14px; }
  .sidebar_right { position: fixed; z-index: 10; top: 76px; right: 8px; bottom: 8px; width: min(280px, calc(100vw - 16px)); transform: translateX(calc(100% + 20px)); transition: transform .25s ease; }
  .middle_area { grid-column: 2; grid-row: 2; min-height: 72vh; }
  .sidebar_left { grid-column: 1; grid-row: 2; }
  .mobile_menu { display: block; }
}

@media (max-width: 480px) {
  .wrapper { grid-template-columns: 1fr; grid-template-rows: 58px 54px minmax(520px, 1fr); }
  .main_menu { grid-column: 1; grid-row: 1; }
  .submenu { grid-column: 1; grid-row: 2; padding: 0 8px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
  .sidebar_left { grid-column: 1; grid-row: 3; position: absolute; z-index: 4; width: 58px; height: calc(100vh - 150px); }
  .middle_area { grid-column: 1; grid-row: 3; min-height: 520px; }
  .main_wrapper { inset: 12px 12px 12px 70px; }
}