/* V0.319 · board-first Four in a Row */
.four-page{max-width:980px}.four-v0319-core{max-width:760px;margin:0 auto;padding:16px}.four-v319-topline{display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,.72fr);gap:12px;align-items:end}.four-v319-block>small,.four-v319-settings label>span,.four-v319-career>small,.four-v319-coach>small{display:block;color:var(--muted);font-size:.68rem;font-weight:900;letter-spacing:.08em}.four-v319-settings{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.four-v319-settings label{display:grid;gap:5px}.four-v319-settings select{width:100%;border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:10px;padding:9px;font:inherit}.four-v319-toolbar{display:flex;gap:7px;flex-wrap:wrap;margin:12px 0 8px}.four-v319-toolbar button{border:1px solid var(--line);background:var(--card);border-radius:10px;padding:8px 11px;font:inherit;font-weight:750;cursor:pointer}.four-v319-toolbar button.active{background:var(--soft);border-color:#a7b1bf}.four-v319-score{display:grid;grid-template-columns:1.4fr repeat(4,minmax(0,1fr));gap:7px;margin:8px 0 10px}.four-v319-score>span{background:var(--soft);border-radius:11px;padding:8px 9px;min-width:0}.four-v319-score small{display:block;color:var(--muted);font-size:.65rem}.four-v319-score strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.92rem}.four-board-zone{width:min(100%,620px);margin:0 auto}.four-board-shell{width:100%;max-width:none;padding:12px;border-radius:20px;background:linear-gradient(180deg,#1f5da8,#174780);box-shadow:0 10px 30px rgba(20,40,70,.14)}.four-board{gap:8px}.four-cell{transition:transform .12s ease,filter .12s ease}.four-cell:hover{transform:translateY(-1px)}.four-column-pad{width:100%;max-width:none;gap:6px;margin-bottom:7px}.four-column-pad button{position:relative;min-height:36px;font-weight:900;transition:.12s}.four-column-pad button span{pointer-events:none}.four-column-pad button.coach-win{background:#e8f8ef;border-color:#39a96b;color:#08783d}.four-column-pad button.coach-win::after{content:'WIN';position:absolute;right:3px;top:2px;font-size:.52rem;font-weight:950}.four-column-pad button.coach-block{background:#fff5e8;border-color:#e6a23c;color:#995b00}.four-column-pad button.coach-block::after{content:'BLOCK';position:absolute;right:2px;top:2px;font-size:.46rem;font-weight:950}.four-actions{max-width:620px;margin:10px auto 0}.four-actions button{min-height:42px}.four-v0319-core>.status{max-width:620px;margin:10px auto 0}.four-v319-coach{max-width:620px;margin:9px auto 0;padding:10px 12px;border:1px solid var(--line);background:var(--soft);border-radius:12px}.four-v319-coach strong{display:block;margin:3px 0}.four-v319-coach p{margin:0;color:var(--muted);font-size:.9rem}.four-tactic-brief{max-width:620px;margin:0 auto 10px}.four-board-zone:fullscreen{background:#f3f6fa;padding:clamp(12px,3vw,34px);display:grid;place-items:center}.four-board-zone:fullscreen .four-board-shell{width:min(92vw,760px)}.four-board-zone:fullscreen .four-column-pad{width:min(92vw,760px)}.four-v319-advanced{margin:16px auto 26px;max-width:980px;border:1px solid var(--line);border-radius:16px;background:var(--card);overflow:hidden}.four-v319-advanced>summary{cursor:pointer;padding:15px 17px;display:flex;justify-content:space-between;gap:12px;align-items:center;font-weight:850;list-style:none}.four-v319-advanced>summary::-webkit-details-marker{display:none}.four-v319-advanced>summary small{font-weight:500;color:var(--muted);text-align:right}.four-v319-advanced[open]>summary{border-bottom:1px solid var(--line)}.four-v319-advanced-body{padding:14px}.four-v319-career{margin-bottom:14px}.four-v319-career .four-stats{margin-top:8px}.four-v319-advanced .four-v0175{margin-top:0}.four-v319-advanced .four-guide{margin-bottom:0}.four-flow-tabs{max-width:760px;margin-left:auto;margin-right:auto}.four-day-nav{max-width:760px;margin-left:auto;margin-right:auto}
@media(max-width:760px){.four-v319-topline{grid-template-columns:1fr}.four-v319-settings{grid-template-columns:repeat(2,minmax(0,1fr))}.four-v319-score{grid-template-columns:repeat(3,minmax(0,1fr))}.four-v319-score>span:first-child{grid-column:span 2}.four-save-chip{display:none}.four-v319-advanced>summary{display:grid}.four-v319-advanced>summary small{text-align:left}}
@media(max-width:560px){.four-v0319-body .mobile-dock{display:none}.four-page{padding-bottom:20px}.gameheader{margin-bottom:8px}.four-flow-tabs{margin:10px 0;gap:6px}.four-flow-tabs a{padding:8px 5px;font-size:.78rem}.four-v0319-core{padding:11px;border-radius:15px}.four-v319-topline{gap:8px}.four-difficulty{grid-template-columns:repeat(2,minmax(0,1fr));gap:5px}.four-difficulty button{font-size:.78rem;padding:8px}.four-v319-settings{grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.four-v319-settings select{padding:8px 6px;font-size:.8rem}.four-v319-toolbar{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px;margin:8px 0}.four-v319-toolbar button{padding:7px 5px;font-size:.78rem}.four-v319-score{grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;margin:7px 0}.four-v319-score>span,.four-v319-score>span:first-child{grid-column:auto;padding:6px 5px}.four-v319-score small{font-size:.58rem}.four-v319-score strong{font-size:.76rem}.four-board-shell{padding:7px;border-radius:14px}.four-board{gap:4px}.four-column-pad{gap:4px;margin-bottom:5px}.four-column-pad button{min-height:30px;font-size:.75rem;padding:2px}.four-column-pad button::after{display:none}.four-actions{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;margin-top:8px}.four-actions button{min-height:38px;padding:7px 2px;font-size:.75rem}.four-v0319-core>.status{font-size:.82rem;padding:9px;margin-top:7px}.four-v319-coach{font-size:.82rem}.four-v319-advanced{margin-top:12px}.four-v319-advanced-body{padding:8px}.four-guide{display:none}}
/* V0.319 mobile-first compression: board stays in the first phone viewport. */
@media(max-width:560px){
  .four-v0319-body .preview-note{display:none}
  .four-v0319-body .topbar{min-height:56px}
  .four-v0319-body .gameheader{margin:8px 0 4px;display:block}
  .four-v0319-body .gameheader .eyebrow,.four-v0319-body .gameheader p,.four-v0319-body .gameheader .scorebox{display:none}
  .four-v0319-body .gameheader h1{font-size:1.75rem;line-height:1.05;margin:0}
  .four-flow-tabs{grid-template-columns:repeat(4,minmax(0,1fr));margin:7px 0;gap:4px}
  .four-flow-tabs a{padding:7px 2px;font-size:.67rem;border-radius:9px}
  .four-v0319-core{padding:8px}
  .four-v319-topline{gap:5px}
  .four-difficulty{grid-template-columns:repeat(4,minmax(0,1fr));gap:3px;margin-top:3px}
  .four-difficulty button{font-size:.66rem;padding:6px 1px;border-radius:8px}
  .four-v319-settings{gap:4px}.four-v319-settings select{padding:6px 4px;font-size:.72rem;border-radius:8px}
  .four-v319-settings label>span{font-size:.58rem}
  .four-v319-toolbar{grid-template-columns:repeat(4,minmax(0,1fr));gap:3px;margin:5px 0}
  .four-v319-toolbar button{padding:5px 1px;font-size:.63rem;min-height:29px;border-radius:8px}
  .four-v319-score{grid-template-columns:repeat(2,minmax(0,1fr));gap:3px;margin:4px 0 5px}
  .four-v319-score>span{padding:4px 6px}.four-v319-score>span:nth-child(n+3){display:none}
  .four-v319-score small{font-size:.54rem}.four-v319-score strong{font-size:.7rem}
  .four-column-pad button{min-height:25px;font-size:.68rem}
  .four-board-shell{padding:6px}.four-board{gap:3px}
  .four-actions{grid-template-columns:repeat(4,minmax(0,1fr));margin-top:5px}.four-actions button{min-height:32px;font-size:.68rem;padding:4px 1px}
  .four-v0319-core>.status{font-size:.72rem;padding:6px 8px;margin-top:5px}
}