:root{--cave:#17130f;--cave-deep:#0f0d0b;--amber:#f7b733;--gold:#ffd166;--moss:#8bbf5a;--teal:#35c2b3;--ruby:#ff5f5f;--stone:#6f757d;--panel:#282019;--panel-light:#392b21;--text:#fff4d8;--muted:#c7b58e}*{box-sizing:border-box}html,body{min-height:100%}body{background:radial-gradient(circle at top, #f7b7332e, transparent 34rem), linear-gradient(180deg, #211811 0%, var(--cave-deep) 100%);color:var(--text);letter-spacing:0;overscroll-behavior:none;-webkit-user-select:none;user-select:none;margin:0;font-family:Trebuchet MS,Arial,sans-serif}button{color:inherit;font:inherit;touch-action:manipulation}.app-shell{place-items:center;min-height:100dvh;padding:12px;display:grid}.phone-frame{background:linear-gradient(transparent 31px, #ffffff06 32px), linear-gradient(90deg, transparent 31px, #ffffff06 32px), var(--cave);background-size:32px 32px;border:4px solid #473324;flex-direction:column;width:min(100%,430px);min-height:min(820px,100dvh - 24px);display:flex;overflow:hidden;box-shadow:0 18px 60px #0000008c}.top-rail{background:#0d0a08;border-bottom:3px solid #473324;justify-content:space-between;align-items:center;min-height:48px;padding:8px 12px;display:flex}.brand-mark{background:var(--amber);color:#1c130a;border:3px solid #fff0b0;place-items:center;width:40px;height:32px;font-weight:900;display:grid;box-shadow:4px 4px #000}.icon-button{background:#241a14;border:3px solid #5d4634;width:40px;height:36px;font-weight:900;box-shadow:3px 3px #000}.screen{flex-direction:column;flex:1;gap:18px;padding:18px;display:flex}.start-screen,.summary-screen{justify-content:center}.kicker{color:var(--moss);text-transform:uppercase;margin:0 0 6px;font-size:.78rem;font-weight:800}h1,h2,h3,p{margin:0}h1{text-shadow:5px 5px #000;font-size:clamp(3rem,18vw,5rem);line-height:.9}h2{text-shadow:4px 4px #000;font-size:2.4rem;line-height:1}h3{font-size:1.05rem}.title-block p:last-child{color:var(--muted);margin-top:12px;font-size:1.06rem}.coin-vault{background:var(--panel);border:3px solid #5d4634;justify-content:space-between;align-items:center;min-height:76px;padding:14px;display:flex;box-shadow:5px 5px #000}.coin-vault.compact{min-height:58px}.coin-vault span,.hud span,.summary-grid span,.upgrade-buy span{color:var(--muted);text-transform:uppercase;font-size:.78rem;font-weight:800}.coin-vault strong{color:var(--gold);font-size:2rem}.action-stack{gap:12px;display:grid}.primary-button,.secondary-button,.ghost-button,.upgrade-buy button,.reset-zone button{background:var(--amber);color:#1c130a;cursor:pointer;border:3px solid #ffe28a;min-height:52px;font-weight:900;box-shadow:5px 5px #000}.secondary-button{background:var(--teal);border-color:#bff0de}.ghost-button,.reset-zone button{color:var(--text);background:#241a14;border-color:#5d4634}.ghost-button.small{min-height:42px;padding:0 14px}button:disabled{opacity:.48;cursor:not-allowed}.future-row{color:var(--muted);text-transform:uppercase;grid-template-columns:1fr 1fr;gap:10px;font-size:.78rem;font-weight:800;display:grid}.future-row span{text-align:center;border:2px dashed #5d4634;padding:10px}.hud,.summary-grid{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.hud div,.summary-grid div{background:var(--panel);border:3px solid #5d4634;min-height:58px;padding:8px;display:grid;box-shadow:3px 3px #000}.hud strong,.summary-grid strong{color:var(--gold);font-size:1.25rem}.layer-meter{background:#0d0a08;border:2px solid #5d4634;height:14px;padding:3px}.layer-meter span{background:linear-gradient(90deg, var(--moss), var(--gold));height:100%;display:block}.relic-toast{color:#fff0fa;background:#4a2040;border:3px solid #ff91d0;place-items:center;min-height:40px;font-weight:900;display:grid;box-shadow:4px 4px #000}.mine-grid{--columns:5;grid-template-columns:repeat(var(--columns), minmax(0, 1fr));gap:8px;margin-top:auto;margin-bottom:auto;display:grid}.mine-tile{aspect-ratio:1;background:#3f332d;border:3px solid #1e1713;place-items:center;width:100%;padding:0;display:grid;position:relative;overflow:visible;transform:translateZ(0);box-shadow:4px 4px #000}.mine-tile:active:not(:disabled){transform:translate(2px,2px);box-shadow:2px 2px #000}.block-face{background:linear-gradient(135deg,#ffffff24 0 16%,#0000 17%),linear-gradient(315deg,#00000038 0 18%,#0000 19%),#75645a;border:3px solid #52433b;position:absolute;inset:5px}.mine-tile.broken{background:#16100c;border-color:#38291f;animation:.18s ease-out break-pop;box-shadow:inset 0 0 0 3px #0d0a08}.mine-tile.broken .block-face{opacity:0}.reward-icon{z-index:1;color:var(--gold);font-size:1.25rem;font-weight:900;position:relative}.mine-tile.coal .reward-icon{color:#b5c1c9}.mine-tile.gem .reward-icon{color:#71f3ff}.mine-tile.chest .reward-icon{color:#ff95d6}.floating-reward{z-index:5;color:var(--gold);text-shadow:2px 2px #000;pointer-events:none;font-weight:900;animation:.82s ease-out forwards float-up;position:absolute;top:2px;left:50%}.floating-reward.rare{color:#71f3ff}.screen-heading{justify-content:space-between;align-items:center;gap:12px;display:flex}.upgrade-list{gap:12px;padding-bottom:8px;display:grid;overflow-y:auto}.upgrade-card{background:var(--panel);border:3px solid #5d4634;grid-template-columns:1fr auto;gap:12px;padding:12px;display:grid;box-shadow:4px 4px #000}.upgrade-card p{color:var(--muted);margin:5px 0 8px;font-size:.86rem}.effect-line{color:var(--moss);font-size:.82rem;font-weight:900}.upgrade-buy{align-content:space-between;justify-items:end;gap:8px;display:grid}.upgrade-buy button{min-width:74px;min-height:42px;padding:0 8px}.reset-zone{margin-top:auto}.reset-zone>div{grid-template-columns:1fr 1fr;gap:8px;display:grid}@keyframes break-pop{0%{transform:scale(1)}55%{transform:scale(1.08)}to{transform:scale(1)}}@keyframes float-up{0%{opacity:0;transform:translate(-50%,10px)scale(.8)}18%{opacity:1}to{opacity:0;transform:translate(-50%,-34px)scale(1)}}@media (max-height:700px){.screen{gap:12px;padding:14px}.mine-grid{gap:6px}h1{font-size:3.4rem}}@media (min-width:700px){.app-shell{padding:24px}}