/* Six Days: stack diagram and animated sample game */
.sd-board { display: grid; grid-template-columns: repeat(6, 1fr); gap: .5rem; align-items: start; }
.sd-col { display: flex; flex-direction: column; gap: .3rem; min-width: 0; }
.sd-day { font-weight: 800; font-size: .85rem; text-align: center; }
.sd-slot { height: 1.9rem; border-radius: 6px; border: 2px dashed #cfc5b3; color: #fff; font-size: .78rem; font-weight: 700; display: grid; place-items: center;
           overflow: hidden; white-space: nowrap; text-overflow: ellipsis; padding: 0 .15rem; }
.sd-slot.is-on { border: 2px solid rgba(0,0,0,.18); }
.sd-em { margin-top: .2rem; font-size: .72rem; color: #6e6048; }
.sd-em.is-ready { border-color: #c9a227; color: #8a6b0a; background: #fff8dc; animation: sd-glow 1.4s ease-in-out infinite; }
.sd-em.is-on { background: linear-gradient(135deg, #f6c453, #e2a521); border: 2px solid #b98a12; color: #2b1a3a; }
.sd-slot.pop { animation: sd-pop .45s cubic-bezier(.2, 1.4, .4, 1); }
@keyframes sd-pop { from { transform: scale(.4) translateY(-14px); opacity: 0; } to { transform: none; opacity: 1; } }
@keyframes sd-glow { 0%, 100% { box-shadow: 0 0 0 0 rgba(201, 162, 39, .5); } 50% { box-shadow: 0 0 0 6px rgba(201, 162, 39, 0); } }
.sd-board.is-small .sd-slot { height: 1.3rem; border-radius: 4px; }
.sd-board.is-small .sd-day { font-size: .75rem; }
.sd-board.is-small .sd-em { display: none; }

.sd-player { background: var(--pp-surface); border: 1px solid var(--pp-line); border-radius: var(--pp-radius); padding: 1.25rem; }
.pp-band.alt .sd-player { background: var(--pp-bg); }
.sd-player h3 { font-size: 1.15rem; margin: 0 0 .15rem; }
.sd-player .sub { margin: 0 0 1rem; color: var(--pp-muted); font-size: .95rem; }
.sd-scores { display: flex; gap: .6rem; flex-wrap: wrap; margin: 1rem 0 .6rem; }
.sd-score { display: flex; align-items: baseline; gap: .5rem; padding: .35rem .8rem; border: 2px solid var(--pp-line); border-radius: 999px; background: #fff; position: relative; }
.sd-score b { font-size: 1.25rem; font-variant-numeric: tabular-nums; }
.sd-score.is-active { border-color: var(--pp-accent); }
.sd-score i { font-style: normal; font-weight: 800; color: #1c6b3a; animation: sd-up .9s ease-out; }
@keyframes sd-up { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.sd-caption { min-height: 4.4rem; margin: .4rem 0 .8rem; }
.sd-step { display: inline-block; font-size: .78rem; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; background: var(--pp-primary); color: #fff; border-radius: 999px; padding: .1rem .6rem; margin-right: .4rem; }
.sd-controls { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; }
.sd-controls button { border: 1px solid var(--pp-line); background: #fff; border-radius: 8px; padding: .4rem .75rem; font-weight: 700; color: var(--pp-ink); }
.sd-controls button[data-play] { background: var(--pp-primary); color: #fff; border-color: var(--pp-primary); min-width: 6.5rem; }
.sd-controls button:disabled { opacity: .45; }
.sd-controls input[type=range] { flex: 1 1 140px; min-width: 120px; accent-color: var(--pp-accent); }
.sd-controls select { border: 1px solid var(--pp-line); border-radius: 8px; padding: .35rem .5rem; background: #fff; }

.sd-idea { display: grid; grid-template-columns: 1fr 1.1fr; gap: 2rem; align-items: center; }
.sd-diagram { background: var(--pp-surface); border: 1px solid var(--pp-line); border-radius: var(--pp-radius); padding: 1rem 1rem .8rem; }
.pp-band.alt .sd-diagram { background: var(--pp-bg); }
.sd-diagram figcaption { text-align: center; color: var(--pp-muted); font-size: .9rem; margin-top: .6rem; }
@media (max-width: 860px) { .sd-idea { grid-template-columns: 1fr; } .sd-board { gap: .3rem; } .sd-slot { font-size: .68rem; } }
@media (prefers-reduced-motion: reduce) { .sd-slot.pop, .sd-em.is-ready, .sd-score i { animation: none; } }