:root{--bg:#0b1020;--panel:#111827;--panel2:#172033;--text:#f8fafc;--muted:#9ca3af;--a:#7c3aed;--b:#06b6d4;--ok:#22c55e;--warn:#f59e0b;--danger:#ef4444;--line:rgba(255,255,255,.12);--shadow:0 24px 70px rgba(0,0,0,.35)}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 20% 10%,rgba(124,58,237,.35),transparent 28%),radial-gradient(circle at 90% 20%,rgba(6,182,212,.25),transparent 24%),var(--bg);color:var(--text);font-family:Inter,Segoe UI,system-ui,Arial,sans-serif;overflow:hidden}button,input,select{font:inherit}button{border:0;cursor:pointer}#appShell{display:grid;grid-template-columns:270px 1fr;height:100vh}.sidebar{padding:22px;background:linear-gradient(180deg,rgba(17,24,39,.97),rgba(11,16,32,.96));border-right:1px solid var(--line);display:flex;flex-direction:column;gap:24px}.brand{display:flex;gap:12px;align-items:center}.brand-logo{width:54px;height:54px}.brand strong{display:block;font-size:20px}.brand span{color:var(--muted);font-size:13px}.sidebar nav{display:grid;gap:9px}.nav-btn{display:flex;align-items:center;gap:12px;padding:14px 15px;border-radius:16px;background:transparent;color:var(--muted);text-align:left}.nav-btn span{width:28px;height:28px;display:grid;place-items:center;background:rgba(255,255,255,.08);border-radius:9px}.nav-btn:hover,.nav-btn.active{background:linear-gradient(135deg,rgba(124,58,237,.28),rgba(6,182,212,.14));color:#fff}.nav-btn.donate{color:#fecaca}.sidebar-footer{margin-top:auto;color:var(--muted);font-size:12px}.main{height:100vh;overflow:hidden;display:flex;flex-direction:column}.topbar{height:78px;display:flex;align-items:center;justify-content:flex-end;gap:14px;padding:16px 22px;border-bottom:1px solid var(--line);background:rgba(11,16,32,.62);backdrop-filter:blur(14px)}.player-card{margin-right:auto;display:flex;gap:12px;align-items:center;background:rgba(255,255,255,.06);border:1px solid var(--line);padding:9px 12px;border-radius:18px}.player-card img{width:42px;height:42px}.player-card label{display:block;font-size:12px;color:var(--muted)}.player-card input{width:160px;background:transparent;border:0;color:#fff;outline:0;font-weight:800}.stat-pill{display:flex;gap:8px;align-items:center;background:rgba(255,255,255,.07);border:1px solid var(--line);border-radius:999px;padding:11px 14px}select{background:var(--panel);color:#fff;border:1px solid var(--line);border-radius:12px;padding:10px}.screen{display:none;overflow:auto;padding:24px;height:calc(100vh - 78px)}.screen.active{display:block}.card-glow{box-shadow:var(--shadow);border:1px solid var(--line);background:linear-gradient(135deg,rgba(23,32,51,.98),rgba(17,24,39,.92));border-radius:28px}.hero{display:grid;grid-template-columns:1.1fr .9fr;min-height:330px;overflow:hidden}.hero-copy{padding:42px}.eyebrow{color:#67e8f9;letter-spacing:.16em;text-transform:uppercase;font-weight:800;font-size:12px}.hero h1{font-size:clamp(34px,5vw,64px);line-height:.96;margin:10px 0 16px}.hero p{color:#d1d5db;max-width:680px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.hero-art{display:grid;place-items:center;background:radial-gradient(circle,rgba(6,182,212,.22),transparent 56%)}.hero-art img{width:min(100%,420px);filter:drop-shadow(0 30px 45px rgba(0,0,0,.4))}.primary,.secondary,.danger{border-radius:15px;padding:12px 16px;color:#fff;font-weight:900;display:inline-flex;text-decoration:none;align-items:center;justify-content:center}.primary{background:linear-gradient(135deg,var(--a),var(--b))}.secondary{background:rgba(255,255,255,.09);border:1px solid var(--line)}.danger{background:rgba(239,68,68,.18);border:1px solid rgba(239,68,68,.36)}.big{font-size:17px;padding:15px 22px}.mode-grid,.skin-grid,.settings-grid{display:grid;grid-template-columns:repeat(4,minmax(180px,1fr));gap:16px;margin-top:18px}.mode-card,.settings-card,.table-card,.skin-card,.hud-card{background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:22px;padding:18px}.mode-card:hover,.skin-card:hover{transform:translateY(-3px);background:rgba(255,255,255,.09)}.mode-card{transition:.18s}.mode-card span{font-size:34px}.mode-card h3{margin:8px 0}.mode-card p,.settings-card p,.muted{color:var(--muted)}.section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.section-head h2{font-size:34px;margin:0}.tabs{display:flex;gap:10px;margin-bottom:12px}.tab{padding:10px 15px;border-radius:12px;background:rgba(255,255,255,.06);color:#fff;border:1px solid var(--line)}.tab.active{background:linear-gradient(135deg,var(--a),var(--b))}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:14px;border-bottom:1px solid var(--line)}th{color:#a5f3fc}.skin-card{display:flex;align-items:center;gap:13px}.skin-card img{width:58px}.settings-card label{display:block;margin:12px 0}.donate-card{max-width:760px;margin:30px auto;padding:40px;text-align:center}.modal{position:fixed;inset:0;background:rgba(0,0,0,.68);display:grid;place-items:center;z-index:50}.modal.hidden{display:none}.modal-card{width:min(92vw,560px);background:linear-gradient(135deg,#172033,#0b1020);border:1px solid var(--line);border-radius:28px;padding:28px;box-shadow:var(--shadow);text-align:center}.result-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:20px 0}.result-grid div{background:rgba(255,255,255,.07);border-radius:16px;padding:12px}.result-grid label{display:block;color:var(--muted);font-size:12px}.result-grid strong{font-size:24px}.modal-actions{display:flex;gap:12px;justify-content:center}.hidden{display:none!important}@media(max-width:1100px){#appShell{grid-template-columns:86px 1fr}.brand div,.nav-btn b,.sidebar-footer{display:none}.sidebar{padding:18px 12px}.nav-btn{justify-content:center}.hero{grid-template-columns:1fr}.hero-art{display:none}.mode-grid,.settings-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:760px){body{overflow:auto}#appShell{display:block}.sidebar{position:fixed;left:0;right:0;bottom:0;height:74px;z-index:30;flex-direction:row;padding:8px;overflow:auto;border-right:0;border-top:1px solid var(--line)}.brand,.sidebar-footer{display:none}.sidebar nav{display:flex;gap:8px;width:100%}.nav-btn{min-width:62px;padding:10px}.main{height:auto;min-height:100vh;padding-bottom:80px}.topbar{height:auto;flex-wrap:wrap;justify-content:flex-start}.screen{height:auto;min-height:calc(100vh - 78px);padding:16px}.mode-grid,.skin-grid,.settings-grid{grid-template-columns:1fr}.hero-copy{padding:26px}.result-grid{grid-template-columns:repeat(2,1fr)}}
/* Premium tower v2 polish */
.name-card{max-width:520px}.name-logo{width:84px;height:84px;margin-bottom:10px;filter:drop-shadow(0 14px 24px rgba(34,211,238,.25))}.big-input{width:100%;padding:16px 18px;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.08);color:#fff;font-weight:900;font-size:20px;outline:0;margin:16px 0 18px}.big-input:focus,.player-card input:focus{box-shadow:0 0 0 3px rgba(34,211,238,.2);border-color:rgba(34,211,238,.5)}
.game-wrap{position:relative;background:#020617;border-radius:28px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.08),0 30px 80px rgba(0,0,0,.35);overflow:hidden}.game-wrap:before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(124,58,237,.16),transparent 16%,transparent 84%,rgba(6,182,212,.14));z-index:1}.game-wrap canvas{position:relative;z-index:0}.hud-card strong{font-size:25px}.hearts{font-size:23px;letter-spacing:2px}.bar{height:16px;background:rgba(255,255,255,.08);border-radius:999px;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(255,255,255,.08)}.bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,#7c3aed,#22d3ee,#22c55e);border-radius:999px;transition:width .12s}.bots ol{margin:8px 0 0;padding-left:20px}.bots li{margin:6px 0;color:#dbeafe}.skin-card{cursor:pointer;position:relative;overflow:hidden}.skin-card:after{content:"";position:absolute;inset:auto 0 0 0;height:3px;background:linear-gradient(90deg,var(--a),var(--b));opacity:.45}.mode-card{cursor:pointer;min-height:148px;background:linear-gradient(135deg,rgba(124,58,237,.13),rgba(6,182,212,.08));}.mode-card:nth-child(2){background:linear-gradient(135deg,rgba(244,114,182,.16),rgba(6,182,212,.08));}.mode-card:nth-child(3){background:linear-gradient(135deg,rgba(245,158,11,.16),rgba(239,68,68,.08));}.mode-card:nth-child(4){background:linear-gradient(135deg,rgba(34,197,94,.13),rgba(6,182,212,.08));}
@media(max-width:1100px){.game-layout{grid-template-columns:1fr!important}.game-panel{grid-template-columns:repeat(4,1fr)!important;display:grid!important}.game-panel .bots{grid-column:span 2}.game-panel .danger{grid-column:span 2}.hearts{font-size:19px}}
@media(max-width:760px){.game-panel{grid-template-columns:repeat(2,1fr)!important}.game-panel .bots,.game-panel .danger{grid-column:span 2}#gameCanvas{min-height:560px}.player-card input{width:120px}.stat-pill{padding:9px 11px}}
.skin-card.active{outline:3px solid rgba(34,211,238,.55);background:linear-gradient(135deg,rgba(34,211,238,.16),rgba(124,58,237,.18))}.skin-card.active:before{content:"✓";position:absolute;right:18px;top:16px;width:28px;height:28px;display:grid;place-items:center;border-radius:999px;background:#22c55e;color:#052e16;font-weight:1000}
/* v1.2.0 premium UI polish */
.topbar{background:linear-gradient(90deg,rgba(20,18,52,.82),rgba(5,22,36,.74));box-shadow:0 14px 50px rgba(0,0,0,.22)}
.player-card{box-shadow:inset 0 0 0 1px rgba(255,255,255,.06),0 14px 30px rgba(0,0,0,.18)}
.status-pill{color:#86efac}.status-pill span{color:#22c55e;text-shadow:0 0 12px #22c55e}.status-pill.offline{color:#fca5a5}.status-pill.offline span{color:#ef4444;text-shadow:0 0 12px #ef4444}.api-note{font-size:12px;color:#a5f3fc;word-break:break-all}.online-web{border-color:rgba(34,211,238,.35);box-shadow:0 0 0 1px rgba(34,211,238,.08),0 10px 24px rgba(6,182,212,.12)}
.hero{position:relative;background:radial-gradient(circle at 76% 28%,rgba(34,211,238,.23),transparent 30%),linear-gradient(135deg,rgba(35,25,78,.98),rgba(5,22,36,.94));}
.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 0 46%,rgba(255,255,255,.08) 50%,transparent 54%);transform:translateX(-100%);animation:heroSweep 7s infinite;pointer-events:none}@keyframes heroSweep{0%,55%{transform:translateX(-100%)}90%,100%{transform:translateX(100%)}}
.mode-card,.skin-card,.settings-card,.table-card,.hud-card{box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 18px 50px rgba(0,0,0,.18)}
.hud-card{background:linear-gradient(135deg,rgba(15,42,60,.88),rgba(24,34,54,.90));border-color:rgba(148,163,184,.18)}
.game-panel .danger{box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 0 25px rgba(239,68,68,.12)}
#gameCanvas{image-rendering:auto}.countdown,.pause{backdrop-filter:blur(8px)}

/* v1.3.0 gameplay clarity and premium HUD */
.zone-card,.checkpoint-card{background:linear-gradient(135deg,rgba(124,58,237,.18),rgba(6,182,212,.13))!important;border-color:rgba(103,232,249,.22)!important}
.hud-card small{display:block;margin-top:6px;color:#a5f3fc;font-size:12px;line-height:1.3}.zone-card strong{font-size:18px!important}.checkpoint-card strong{font-size:16px!important;color:#fde68a}.game-panel{scrollbar-width:thin;scrollbar-color:rgba(34,211,238,.5) rgba(255,255,255,.05)}
@media(max-width:1100px){.game-panel .zone-card,.game-panel .checkpoint-card{grid-column:span 2}}