@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font-body);font-size:16px;line-height:1.5;color:var(--color-body);background-color:var(--color-canvas);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);color:var(--color-body-strong);margin:0}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}:root{--board-max-width: 280px;--board-max-width-medium: 320px;--board-max-width-hard: 360px}@media (min-width: 768px){:root{--board-max-width: 340px;--board-max-width-medium: 420px;--board-max-width-hard: 520px}}@media (min-width: 1280px){:root{--board-max-width: 400px;--board-max-width-medium: 500px;--board-max-width-hard: 620px}}.pips-board{width:100%;max-width:var(--board-max-width)}.pips-board[data-difficulty=medium]{max-width:min(calc(100vw - 2 * var(--space-md)),var(--board-max-width-medium))}.pips-board[data-difficulty=hard]{max-width:min(calc(100vw - 2 * var(--space-md)),var(--board-max-width-hard))}@keyframes pips-shake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}.pips-board[data-invalid=true]{animation:pips-shake .36s ease-in-out}@media (max-width: 480px){.pips-tray{gap:8px;padding:8px}.pips-tray-domino[data-orientation=horizontal]{width:72px;height:36px}.pips-tray-domino[data-orientation=vertical]{width:36px;height:72px}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}:root{--color-ink: #0a0a0a;--color-ink-active: #1f1f1f;--color-body: #3a3a3a;--color-body-strong: #1a1a1a;--color-muted: #6a6a6a;--color-muted-soft: #9a9a9a;--color-hairline: #e5e5e5;--color-hairline-soft: #f0f0f0;--color-canvas: #fffaf0;--color-surface-soft: #faf5e8;--color-surface-card: #f5f0e0;--color-surface-strong: #ebe6d6;--color-on-primary: #ffffff;--color-brand-pink: #ff4d8b;--color-brand-teal: #2f7a78;--color-brand-lavender: #b8a4ed;--color-brand-peach: #ffb084;--color-brand-ochre: #e8b94a;--color-brand-mint: #7dd3b0;--color-brand-coral: #ff6b5a;--color-brand-sky: #7cc4f0;--color-brand-plum: #9b5fb8;--color-brand-lime: #c4d96b;--color-brand-rose: #f4a8b8;--color-brand-rust: #d97742;--color-success: #22c55e;--color-warning: #f59e0b;--color-error: #ef4444;--space-xxs: 4px;--space-xs: 8px;--space-sm: 12px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-xxl: 48px;--space-section: 96px;--radius-xs: 6px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-pill: 9999px;--font-display: "Inter", system-ui, sans-serif;--font-body: "Inter", system-ui, sans-serif}.pips-board{display:grid;gap:3px;padding:var(--space-md);background:var(--color-canvas);border-radius:var(--radius-lg)}.pips-board{touch-action:none}.pips-board-cell{aspect-ratio:1;border-radius:var(--radius-sm);position:relative;overflow:hidden;transition:filter .16s ease;touch-action:none}.pips-board-cell[data-domino-id]:hover{filter:brightness(1.08)}.pips-board-cell--empty{background:transparent!important}.constraint-chip{position:absolute;bottom:4px;right:4px;display:inline-flex;align-items:center;justify-content:center;min-width:24px;height:24px;padding:0 7px;background:var(--color-canvas);color:var(--color-ink);border-radius:var(--radius-pill);font-weight:600;font-size:14px;line-height:1;z-index:2;box-shadow:0 1px 2px #00000014;transition:box-shadow .16s ease,background-color .16s ease,color .16s ease}.constraint-chip[data-violated=true]{background:var(--color-danger, #b00020);color:var(--color-canvas);box-shadow:0 0 0 2px #b0002059;animation:pips-violation-pulse .48s ease-in-out 2}.pips-board-cell[data-violated=true]:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:inherit;pointer-events:none;box-shadow:inset 0 0 0 2px var(--color-danger, #b00020);z-index:1}@keyframes pips-violation-pulse{0%,to{transform:scale(1)}50%{transform:scale(1.12)}}.pips-cell-domino-half{position:absolute;top:4px;right:4px;bottom:4px;left:4px;background:var(--color-ink);border-radius:var(--radius-md);pointer-events:none;z-index:1}.pips-cell-domino-half[data-enter=true]{animation:pips-place .24s cubic-bezier(.34,1.56,.64,1)}@keyframes pips-place{0%{transform:scale(.6);opacity:0}60%{transform:scale(1.06);opacity:1}to{transform:scale(1);opacity:1}}.pips-cell-domino-half[data-orientation=horizontal][data-position=first]{border-top-right-radius:4px;border-bottom-right-radius:4px;right:0}.pips-cell-domino-half[data-orientation=horizontal][data-position=second]{border-top-left-radius:4px;border-bottom-left-radius:4px;left:0}.pips-cell-domino-half[data-orientation=vertical][data-position=first]{border-bottom-left-radius:4px;border-bottom-right-radius:4px;bottom:0}.pips-cell-domino-half[data-orientation=vertical][data-position=second]{border-top-left-radius:4px;border-top-right-radius:4px;top:0}.pips-cell-domino-half .pip{position:absolute;width:9px;height:9px;border-radius:50%;background:var(--color-canvas)}.pips-cell-domino-half .pip.spot-tl{top:12%;left:12%}.pips-cell-domino-half .pip.spot-tr{top:12%;right:12%}.pips-cell-domino-half .pip.spot-ml{top:50%;left:12%;transform:translateY(-50%)}.pips-cell-domino-half .pip.spot-mc{top:50%;left:50%;transform:translate(-50%,-50%)}.pips-cell-domino-half .pip.spot-mr{top:50%;right:12%;transform:translateY(-50%)}.pips-cell-domino-half .pip.spot-bl{bottom:12%;left:12%}.pips-cell-domino-half .pip.spot-br{bottom:12%;right:12%}.pips-landing{min-height:100vh;padding:var(--space-xl) var(--space-md);background:var(--color-canvas);display:flex;flex-direction:column;align-items:center;gap:var(--space-xl)}.pips-landing-header{text-align:center}.pips-landing-header h1{font:500 72px / 1 var(--font-display);letter-spacing:-2.5px;margin:0;color:var(--color-ink)}.pips-landing-date{font:400 16px / 1.4 var(--font-body);color:var(--color-muted);margin:var(--space-xs) 0 0 0}.pips-difficulty-grid{display:grid;grid-template-columns:repeat(3,minmax(160px,1fr));gap:var(--space-md);max-width:720px;width:100%}.pips-difficulty-card{background:var(--brand, var(--color-surface-card));color:var(--color-ink);border:none;border-radius:var(--radius-xl);padding:var(--space-xl);cursor:pointer;text-align:left;min-height:140px;transition:transform .12s;font:inherit}.pips-difficulty-card:hover{transform:translateY(-2px)}.pips-difficulty-card h2{font:600 24px / 1.2 var(--font-display);margin:0 0 var(--space-sm) 0}.pips-difficulty-stats{font:400 14px / 1.4 var(--font-body);margin:0;color:var(--color-body)}.pips-practice{display:flex;flex-direction:column;align-items:center;gap:var(--space-sm)}.pips-practice-label{margin:0;font:500 14px / 1.4 var(--font-body);color:var(--color-muted);text-transform:uppercase;letter-spacing:1px}.pips-practice-buttons{display:flex;gap:var(--space-sm);flex-wrap:wrap;justify-content:center}.pips-practice-button{background:var(--color-canvas);color:var(--color-ink);border:1px solid var(--color-hairline);border-radius:var(--radius-pill);padding:var(--space-xs) var(--space-md);font:600 14px / 1 var(--font-body);cursor:pointer;transition:transform .14s ease,background .14s ease,border-color .14s ease,box-shadow .14s ease}.pips-practice-button:hover{background:var(--brand, var(--color-surface-card));border-color:transparent;transform:translateY(-2px);box-shadow:0 4px 10px #00000014}.pips-howto-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0a0a0a80;display:flex;align-items:center;justify-content:center;padding:var(--space-md);z-index:100}.pips-howto-card{background:var(--color-canvas);color:var(--color-ink);border-radius:var(--radius-xl);padding:var(--space-xl);max-width:480px;width:100%;box-shadow:0 24px 64px #0003}.pips-howto-card h2{font:600 28px / 1.2 var(--font-display);margin:0 0 var(--space-md) 0}.pips-howto-card ol{margin:0 0 var(--space-lg) 0;padding-left:var(--space-lg);display:flex;flex-direction:column;gap:var(--space-sm)}.pips-howto-card li{font:400 16px / 1.5 var(--font-body);color:var(--color-body)}.pips-btn-primary{background:var(--color-ink);color:var(--color-on-primary);border:none;border-radius:var(--radius-pill);padding:var(--space-sm) var(--space-lg);font:500 16px / 1 var(--font-body);cursor:pointer;transition:background .12s}.pips-btn-primary:hover{background:var(--color-ink-active)}@media (max-width: 600px){.pips-difficulty-grid{grid-template-columns:1fr}.pips-landing-header h1{font-size:56px}}.pips-tray{display:flex;gap:var(--space-sm);padding:var(--space-md);flex-wrap:wrap;justify-content:center;background:var(--color-surface-soft);border-radius:var(--radius-lg);touch-action:none}.pips-tray-domino{display:flex;align-items:center;justify-content:center;width:96px;height:96px;cursor:grab;-webkit-user-select:none;user-select:none;touch-action:none;border-radius:var(--radius-md);background:transparent}.pips-tray-domino[data-state=placed]{opacity:.2;cursor:default}.pips-domino-body{display:flex;background:var(--color-ink);border-radius:var(--radius-md);overflow:hidden;transition:width .16s ease,height .16s ease,transform .14s ease,box-shadow .14s ease;box-shadow:0 1px 2px #0000000f}.pips-tray-domino:hover:not([data-state=placed]) .pips-domino-body{transform:translateY(-3px) scale(1.04);box-shadow:0 6px 14px #00000026}.pips-tray-domino:active:not([data-state=placed]) .pips-domino-body{transform:translateY(-1px) scale(1.02)}.pips-tray-domino[data-dragging=true] .pips-domino-body{transform:scale(1.06);box-shadow:0 8px 18px #00000038}.pips-domino-body[data-orientation=horizontal]{flex-direction:row;width:92px;height:46px}.pips-domino-body[data-orientation=vertical]{flex-direction:column;width:46px;height:92px}.pips-domino-body[data-orientation=horizontal][data-flipped=true]{flex-direction:row-reverse}.pips-domino-body[data-orientation=vertical][data-flipped=true]{flex-direction:column-reverse}.pips-domino-half{flex:1;position:relative}.pips-domino-body[data-orientation=horizontal] .pips-domino-half+.pips-domino-half{border-left:1px solid var(--color-on-primary)}.pips-domino-body[data-orientation=vertical] .pips-domino-half+.pips-domino-half{border-top:1px solid var(--color-on-primary)}.pip{position:absolute;width:7px;height:7px;border-radius:50%;background:var(--color-canvas)}.pip.spot-tl{top:6px;left:6px}.pip.spot-tr{top:6px;right:6px}.pip.spot-ml{top:50%;left:6px;transform:translateY(-50%)}.pip.spot-mc{top:50%;left:50%;transform:translate(-50%,-50%)}.pip.spot-mr{top:50%;right:6px;transform:translateY(-50%)}.pip.spot-bl{bottom:6px;left:6px}.pip.spot-br{bottom:6px;right:6px}.pips-win-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0a0a0a80;display:flex;align-items:center;justify-content:center;z-index:100;animation:pips-overlay-in .22s ease-out}@keyframes pips-overlay-in{0%{background:#0a0a0a00}to{background:#0a0a0a80}}.pips-win-card{background:var(--color-canvas);border-radius:var(--radius-xl);padding:var(--space-xl);text-align:center;max-width:360px;width:calc(100% - 32px);position:relative;overflow:hidden;animation:pips-card-in .36s cubic-bezier(.34,1.56,.64,1)}@keyframes pips-card-in{0%{transform:scale(.7) translateY(20px);opacity:0}to{transform:scale(1) translateY(0);opacity:1}}.pips-win-time{font-size:48px;font-weight:500;letter-spacing:-1px;margin:var(--space-md) 0}.pips-win-difficulty{color:var(--color-muted);margin:0 0 var(--space-lg);font-size:14px}.pips-win-actions{display:flex;flex-direction:column;gap:var(--space-sm)}.pips-btn-primary{background:var(--color-ink);color:var(--color-on-primary);border:none;border-radius:var(--radius-md);padding:12px 20px;font:600 14px var(--font-body);cursor:pointer}.pips-btn-secondary{background:var(--color-canvas);color:var(--color-ink);border:1px solid var(--color-hairline);border-radius:var(--radius-md);padding:12px 20px;font:600 14px var(--font-body);cursor:pointer}.pips-confetti{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.pips-confetti span{position:absolute;top:0;width:8px;height:8px;border-radius:2px;animation:confetti-fall 1.6s ease-out forwards}@keyframes confetti-fall{0%{transform:translateY(-50%) rotate(0);opacity:1}to{transform:translate(var(--cx),200%) rotate(720deg);opacity:0}}.pips-board{position:relative}.pips-reveal-overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:5;pointer-events:auto;animation:pips-reveal-fade-in .16s ease}.pips-reveal-overlay .pips-board{background:transparent}.pips-reveal-overlay .pips-board-cell{background-color:transparent!important}.pips-reveal-overlay .pips-cell-domino-half{background:var(--color-brand-pink);opacity:.55}.pips-reveal-overlay .constraint-chip{display:none}.pips-board--locked{pointer-events:none}.pips-reveal-controls{display:flex;flex-direction:column;align-items:center;gap:var(--space-xs);margin-top:var(--space-md)}.pips-reveal-button{background:transparent;border:1px solid var(--color-hairline);border-radius:var(--radius-pill);padding:var(--space-xs) var(--space-md);font-size:14px;color:var(--color-body-strong);font-weight:500;cursor:pointer;transition:background-color .12s ease}.pips-reveal-button:hover{background:var(--color-surface-soft)}.pips-reveal-button[hidden]{display:none}.pips-reveal-error{font-size:13px;color:var(--color-danger, #b00020)}.pips-reveal-error[hidden]{display:none}@keyframes pips-reveal-fade-in{0%{opacity:0}to{opacity:1}}.pips-app-shell{min-height:100vh;display:flex;flex-direction:column}.pips-app-header{position:sticky;top:0;background:var(--color-canvas);border-bottom:1px solid var(--color-hairline-soft);padding:var(--space-md);display:flex;justify-content:space-between;align-items:center;height:64px;z-index:10}.pips-app-home,.pips-app-howto{background:transparent;border:1px solid var(--color-hairline);border-radius:var(--radius-pill);padding:var(--space-xs) var(--space-md);font-size:14px;color:var(--color-body-strong);font-weight:500;transition:background-color .12s ease}.pips-app-home:hover,.pips-app-howto:hover{background:var(--color-surface-soft)}.pips-app-home[hidden]{display:none}.pips-app-main{flex:1;display:flex;flex-direction:column;align-items:center;padding:var(--space-md)}