*{box-sizing:border-box}
:root{--bg:#F1E3DD;--text:#222;--muted:#666;--light:#739C7C;--shadow:#BB747F;--card:#fff;--border:#e5e5e5;--cream:#E7C7B9;--creamText:#000;--creamBorder:#000;--rowHL:#E8C8BA}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif}
.container{max-width:1100px;margin:0 auto;padding:16px}
h1{font-size:28px;margin:8px 0 4px}
h2{font-size:20px;margin:12px 0 8px}
h3{font-size:18px;margin:12px 0 8px}
.intro p{margin:6px 0}
.howto{padding-left:18px;margin:6px 0}
.controls{display:flex;gap:12px;align-items:center;margin:12px 0 4px}
.hint{color:var(--muted);font-size:14px}
.btn{border:1px solid var(--creamBorder);background:var(--cream);color:var(--creamText);border-radius:10px;padding:8px 12px;cursor:pointer}
.btn:hover{filter:brightness(0.98)}
.btn.danger{background:var(--cream);border-color:var(--creamBorder);color:var(--creamText)}

.slots{display:grid;grid-template-columns:repeat(5, 1fr);gap:12px;margin:12px 0 20px}
@media (max-width: 800px){.slots{grid-template-columns:1fr}}

.slot{background:var(--card);border:1px dashed var(--border);border-radius:14px;aspect-ratio: 2.5 / 3.5;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}
.card-inner{position:absolute;inset:0;transform-style:preserve-3d;transition:transform .4s ease}
.card-inner.flipped{transform:rotateY(180deg)}
.card-face{position:absolute;inset:0;backface-visibility:hidden;display:flex;align-items:center;justify-content:center;padding:8px}
.card-front{background:#fff}
.card-front img{width:100%;height:100%;object-fit:contain;object-position:center center}
.card-back{background:#fff;transform:rotateY(180deg);padding:12px;overflow:auto;display:block}
.card-back .title{font-weight:700;text-align:center;font-size:20px;margin:0 0 10px}
.card-back .body{white-space:pre-wrap}

.slot .badge{position:absolute;top:8px;left:8px;font-size:12px;padding:4px 8px;background:var(--cream);border-radius:999px;border:1px solid var(--creamBorder);color:var(--creamText)}
.slot .card-inner ~ .badge{display:none!important}
.remove{position:absolute;top:6px;right:6px;width:26px;height:26px;border:none;border-radius:999px;cursor:pointer;background:#fff;border:1px solid var(--border)}
.remove:after{content:"×";font-size:18px;line-height:24px}

.lists{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.list-col.solo{grid-column:1 / -1}
@media (max-width: 800px){.lists{grid-template-columns:1fr}}
.card-list{list-style:none;margin:0;padding:0;border:1px solid var(--border);border-radius:12px;background:#fff}
.card-list li{padding:10px 12px;border-top:1px solid var(--border);cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.card-list li:first-child{border-top:none}
.card-list li:hover{background:#fafafa}
.card-list .pill{font-size:12px;padding:2px 8px;border-radius:999px;border:1px solid var(--border)}
.light{color:var(--light)}
.shadow{color:var(--shadow)}

/* Headers with arrows */
.list-col h3{cursor:pointer;user-select:none;color:#fff;padding:12px 14px;border-radius:12px;position:relative;padding-right:28px}
.list-col h3.light{background:var(--light)}
.list-col h3.shadow{background:var(--shadow)}
.list-col.solo h3{color:#000;background:transparent}
.list-col h3::after{content:'▾'; position:absolute; right:10px; top:50%; transform:translateY(-50%) rotate(0deg)}
.list-col h3.collapsed::after{content:'▸'; transform:translateY(-50%)}

.card-list.light{border-top:4px solid var(--light)}
.card-list.shadow{border-top:4px solid var(--shadow)}
.card-list.collapsed{display:none}

/* Blank inputs */
.blank-title{position:absolute; top:8px; left:8px; right:8px; padding:6px 8px; border:1px solid var(--border); border-radius:8px; background:#fff; font-weight:700; font-size:20px; text-align:center}
.blank-body{width:100%; height:100%; border:0; outline:0; resize:none; font:inherit; line-height:1.4}

/* Highlight */
.card-list li.selected{background:var(--rowHL)}