/* styles.css */
:root{
  --bg: #0e0f12;
  --panel: #14161b;
  --panel-2: #1a1d24;
  --ink: #e8f0ff;
  --muted: #9aa4b2;
  --accent: #7c5cff;
  --accent-2: #30e0a1;
  --ring: rgba(124,92,255,.45);
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 16px;
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  background: radial-gradient(1200px 800px at 10% -10%, rgba(124,92,255,.08), transparent 40%),
              radial-gradient(1000px 800px at 110% 110%, rgba(48,224,161,.08), transparent 40%),
              var(--bg);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Noto Sans", "Helvetica Neue", Arial, "Apple Color Emoji","Segoe UI Emoji";
  line-height: 1.35;
}

.app{
  display:grid;
  grid-template-columns: 320px 1fr;
  gap: 18px;
  padding: 20px clamp(16px, 4vw, 32px);
  max-width: 1400px;
  margin: 0 auto;
}

/* Left Menu */
.left-menu{
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  position: sticky;
  top: 16px;
  align-self: start;
  max-height: calc(100vh - 32px);
  overflow: auto;
}
.menu-header h1{
  margin: 4px 0 2px;
  font-size: 1.2rem;
  letter-spacing: .4px;
}
.menu-header p{
  margin: 0 0 12px;
  color: var(--muted);
  font-size: .92rem;
}

.draggables{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.chip{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 10px 12px;
  background: rgba(124,92,255,.12);
  color: var(--ink);
  border: 1px solid rgba(124,92,255,.35);
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: .2px;
  cursor: grab;
  user-select: none;
  transition: transform .12s ease, box-shadow .12s ease, background .2s ease;
  outline: none;
}
.chip:active{ cursor: grabbing; }
.chip.dragging{ transform: scale(.95); box-shadow: 0 8px 20px rgba(124,92,255,.25); }
.chip.placed{ position: relative; padding-right: 28px; }
.chip-close{
  position:absolute; right:6px; top:50%; transform: translateY(-50%);
  width:20px; height:20px; border-radius:50%;
  background: rgba(255,255,255,.08);
  color: var(--ink); border: 1px solid rgba(255,255,255,.15);
  font-size: 14px; line-height: 18px;
  display:grid; place-items:center;
  cursor:pointer;
}

/* Board */
.board{
  display:grid;
  grid-template-columns: 1fr 48px 180px; /* left / very narrow middle / little right */
  gap: 16px;
  align-items: stretch;
}

/* Columns */
.col{
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.00));
  border: 1px dashed rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 12px;
  min-height: 380px;
}

/* Column A: grid of cells */
.col-a{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-auto-rows: 60px;
  gap: 12px;
}

/* Column B: single tall cell */
.col-b{ display:grid; grid-template-rows: 1fr; }
.col-b .tall{ height: 100%; display:flex; align-items:center; justify-content:center; }

/* Column C: vertical stack */
.col-c{ display:grid; grid-auto-rows: 60px; gap: 10px; }

/* Cells */
.cell{
  border-radius: 14px;
  border: 1px dashed rgba(255,255,255,.18);
  background: linear-gradient(180deg, rgba(124,92,255,.08), rgba(124,92,255,.02));
  display:grid; place-items:center;
  position: relative;
  transition: box-shadow .2s ease, background .2s ease, border-color .2s ease;
  outline: none;
}
.cell::after{
  content: "Drop here";
  color: var(--muted);
  font-size: .82rem;
  letter-spacing: .3px;
  pointer-events: none;
}
.dropzone.over{
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--ring) inset;
  background: linear-gradient(180deg, rgba(124,92,255,.15), rgba(124,92,255,.05));
}
.cell.occupied::after{ content: ""; }

/* Placed chip in cells */
.dropzone .chip{
  background: rgba(48,224,161,.12);
  border-color: rgba(48,224,161,.45);
}
/* Vertical style for the middle column */
.chip.vertical{
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: .04em;
  padding: 12px 10px;
  min-height: 120px;
}
.chip.vertical .chip-close{
  right: 50%;
  transform: translate(50%, -50%);
}

/* Footer actions */
.actions{
  position: sticky;
  bottom: 0;
  z-index: 10;
  display:flex;
  gap: 12px;
  justify-content: center;
  padding: 16px;
  background: linear-gradient(180deg, rgba(20,22,27,.0), rgba(20,22,27,.9) 20%, rgba(20,22,27,.95));
  backdrop-filter: blur(6px);
  border-top: 1px solid rgba(255,255,255,.06);
  margin-top: 18px;
}
.action{
  appearance: none;
  border: 1px solid rgba(255,255,255,.16);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  color: var(--ink);
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 700;
  letter-spacing: .3px;
  cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease, background .2s ease;
}
.action:hover{ transform: translateY(-1px); box-shadow: 0 10px 24px rgba(0,0,0,.25); }
.action:active{ transform: translateY(0); }

.action-primary{
  border-color: rgba(124,92,255,.55);
  background: linear-gradient(180deg, rgba(124,92,255,.35), rgba(124,92,255,.2));
}

.hidden{ display:none !important; }

/* Responsive */
@media (max-width: 1100px){
  .board{ grid-template-columns: 1fr 40px 150px; }
}
@media (max-width: 900px){
  .app{ grid-template-columns: 1fr; }
  .left-menu{ position: relative; top: 0; max-height: none; }
}
@media (max-width: 560px){
  .col-a{ grid-template-columns: repeat(2, 1fr); }
  .board{ grid-template-columns: 1fr 36px 120px; }
  .chip.vertical{ min-height: 90px; }
}