:root{font-family:Trebuchet MS,Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color:#15314b;background:#f4fbff}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 15% 10%,#ffe9a7,#ffe9a700 38%),radial-gradient(circle at 90% 15%,#c8ecff,#c8ecff00 36%),linear-gradient(180deg,#f8fdff,#eef7ff)}.page{min-height:100vh;padding:18px;display:flex;flex-direction:column;gap:16px}.hero{background:#fffc;border:1px solid #dcecff;border-radius:18px;padding:16px;box-shadow:0 10px 24px #10385f1a}.kicker{margin:0 0 6px;font-weight:700;font-size:.78rem;letter-spacing:.06em;color:#0f5ea6;text-transform:uppercase}h1{margin:0;font-size:1.85rem;line-height:1.1}.subtitle{margin:8px 0 0;color:#3d5571}.actions{display:flex;flex-direction:column;gap:14px}button{border:0;border-radius:14px;padding:16px 18px;background:linear-gradient(135deg,#1b5cff,#0a8dff);color:#fff;font-size:1.03rem;font-weight:700;width:100%;min-height:56px;box-shadow:0 8px 18px #1754bb38}button:active{transform:translateY(1px)}.secondary{background:#fff;color:#1b5cff;border:2px solid #9ec7ff;box-shadow:none}.join-card{display:flex;flex-direction:column;gap:10px;background:#fffc;border:1px solid #dcecff;border-radius:16px;padding:14px}.join-label{font-weight:600}.join-input{border:2px solid #c6dcff;border-radius:12px;min-height:52px;padding:12px;font-size:1rem}.join-input:focus{outline:0;border-color:#1b5cff;box-shadow:0 0 0 3px #1b5cff24}.hint{margin:0;font-size:.94rem;color:#4f6480}@media (min-width: 720px){.page{max-width:540px;margin:0 auto;padding:28px 20px}}.board{margin:4px 0 10px;display:flex;flex-direction:column;gap:8px;background:#fffc;border:1px solid #dcecff;border-radius:16px;padding:12px}.row{display:flex;gap:8px}.cell{width:68px;height:68px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;background:#e7f2ff;color:#18476f;font-size:1.35rem;box-shadow:inset 0 -3px #d0e6ff;min-height:68px}@media (max-width: 380px){.cell{width:60px;height:60px;min-height:60px}}.connect4-board,.connect4-row{gap:6px}.connect4-cell{width:42px;height:42px;min-height:42px;border-radius:12px;padding:0}.connect4-cell-hovered{background:#d7e9ff;box-shadow:inset 0 -3px #bfd9ff}.connect4-token{width:28px;height:28px;border-radius:999px;display:inline-block}.token-red{background:#ff5546}.token-yellow{background:#ffd84f}.token-empty{background:#dbe7f7}@media (max-width: 380px){.connect4-cell{width:36px;height:36px;min-height:36px;border-radius:10px}.connect4-token{width:24px;height:24px}}.battleboard-panel{display:flex;flex-direction:column;gap:10px;background:#fffc;border:1px solid #dcecff;border-radius:16px;padding:14px}.battleboard-title{margin:0;font-size:1.05rem;color:#15314b}.battleboard-grid{display:flex;flex-direction:column;gap:6px}.battleboard-grid-wrap{--battle-cell-size: 54px;--battle-cell-gap: 6px;position:relative;width:fit-content}.battleboard-ship-overlays{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:5}.battleboard-ship-overlay{position:absolute;display:flex;align-items:center;justify-content:center}.battleboard-ship-overlay-sprite{width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 1px 1px #0c2a4333)}.battleboard-ship-overlay-sprite-active{opacity:.82}.battleboard-ship-overlay-sprite-vertical{transform:rotate(90deg)}.battleboard-ship-overlay-sprite-placing{filter:drop-shadow(0 0 6px #ffbf47b0)}.battleboard-row{display:flex;gap:6px}.battleboard-cell{width:54px;height:54px;min-height:54px;border-radius:12px;padding:0;background:#e7f2ff;position:relative;z-index:2}.battleship-token{width:24px;height:24px;border-radius:999px;display:inline-block}.battleship-empty{background:#dbe7f7}.battleship-ship{background:#51718f}.battleship-hit{background:#ff5546}.battleship-miss{background:#7ab8ff}.battleship-sunk{background:linear-gradient(135deg,#7b4a2f,#5c3925);box-shadow:inset 0 -2px #2f1d13}.battleship-placing{background:#ffc852;box-shadow:0 0 6px #ffb800}.battleship-sprite-token{width:34px;height:34px;object-fit:contain;filter:drop-shadow(0 1px 1px #0c2a4333)}.battleship-sprite-placing{filter:drop-shadow(0 0 6px #ffbf47b0)}.battleboard-ship-legend{display:flex;flex-direction:column;gap:8px}.battleboard-ship-item{display:flex;align-items:center;gap:8px;padding:6px 8px;border:1px solid #d5e6f8;border-radius:10px;background:#f3f9ff}.battleboard-ship-sprite{width:96px;height:34px;object-fit:contain}.battleboard-ship-sprite-placed{filter:saturate(1.1) contrast(1.1)}.battleboard-cell-sunk{background:#ead7c8}@media (max-width: 380px){.battleboard-cell{width:46px;height:46px;min-height:46px}.battleboard-grid-wrap{--battle-cell-size: 46px}.battleship-token{width:20px;height:20px}.battleship-sprite-token{width:28px;height:28px}.battleboard-ship-sprite{width:84px;height:30px}.chess-board{--chess-square-size: clamp(22px, 6.8vw, 32px);--chess-label-width: clamp(12px, 4vw, 16px);gap:3px}}.chess-panel{display:flex;flex-direction:column;gap:10px;background:#fffc;border:1px solid #dcecff;border-radius:16px;padding:14px}.chess-title{margin:0;font-size:1.05rem;color:#15314b}.chess-board{--chess-square-size: clamp(24px, 7.2vw, 48px);--chess-label-width: clamp(14px, 4.2vw, 24px);display:inline-grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;gap:8px;align-items:start}.chess-label-col{grid-column:1;grid-row:1;display:flex;flex-direction:column;gap:0}.chess-label{width:var(--chess-label-width);height:var(--chess-square-size);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:clamp(.68rem,2.8vw,.85rem);color:#15314b}.chess-grid{grid-column:2;grid-row:1;display:grid;grid-template-columns:repeat(8,1fr);gap:0;background:#8b6f47;padding:4px;border-radius:4px}.chess-square{width:var(--chess-square-size);height:var(--chess-square-size);min-height:var(--chess-square-size);padding:0;border:none;border-radius:0;background:#f0d9b5;color:#15314b;font-size:clamp(1.05rem,4vw,1.4rem);display:flex;align-items:center;justify-content:center;box-shadow:none;cursor:pointer}.chess-square.dark{background:#b58863}.chess-square.light{background:#f0d9b5}.chess-square.selected{background:#baca44;box-shadow:inset 0 0 0 2px #8a9e1b}.chess-square.legal-move{box-shadow:inset 0 0 0 2px #4a90e2}.chess-square.legal-capture{box-shadow:inset 0 0 0 2px #d13333}.chess-piece{display:flex;align-items:center;justify-content:center}.chess-piece.white{color:#fffef2;text-shadow:0 0 1px #27384a,0 1px 2px #27384a}.chess-piece.black{color:#1f2b36}.chess-label-row{grid-column:2;grid-row:2;display:grid;grid-template-columns:repeat(8,1fr);gap:0}.win-overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;pointer-events:none;z-index:999;animation:win-fade-in .32s ease-out}.win-overlay-burst{position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(circle at 20% 20%,#ffd34d 0,#ffd34d 8px,#ffd34d00 10px),radial-gradient(circle at 80% 22%,#ff6a5b 0,#ff6a5b 8px,#ff6a5b00 10px),radial-gradient(circle at 18% 75%,#48b5ff 0,#48b5ff 7px,#48b5ff00 9px),radial-gradient(circle at 82% 78%,#57d987 0,#57d987 7px,#57d98700 9px),radial-gradient(circle at 50% 12%,#9a75ff 0,#9a75ff 7px,#9a75ff00 9px),radial-gradient(circle at 50% 88%,#ff8b31 0,#ff8b31 7px,#ff8b3100 9px);opacity:.55;animation:win-burst-float 2.2s ease-in-out infinite}.draw-overlay-burst{position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(circle at 18% 18%,#88a3be 0,#88a3be 7px,#88a3be00 9px),radial-gradient(circle at 82% 24%,#7fb9cf 0,#7fb9cf 7px,#7fb9cf00 9px),radial-gradient(circle at 24% 78%,#93a0d9 0,#93a0d9 6px,#93a0d900 8px),radial-gradient(circle at 78% 80%,#9ba7b3 0,#9ba7b3 6px,#9ba7b300 8px),radial-gradient(circle at 50% 15%,#a9bfd1 0,#a9bfd1 6px,#a9bfd100 8px),radial-gradient(circle at 50% 85%,#9fb3c4 0,#9fb3c4 6px,#9fb3c400 8px);opacity:.45;animation:win-burst-float 2.6s ease-in-out infinite}.win-overlay-card{background:linear-gradient(135deg,#fff,#f6fbff);border:2px solid #ffd34d;border-radius:18px;padding:18px 20px;min-width:280px;max-width:calc(100vw - 32px);text-align:center;box-shadow:0 18px 36px #1f3e621f,0 0 0 6px #ffd34d33;animation:win-card-pop .52s cubic-bezier(.2,.9,.2,1)}.win-overlay-title{margin:0;font-size:2rem;line-height:1.05;color:#ea4a1f;text-transform:uppercase;letter-spacing:.04em}.win-overlay-subtitle{margin:10px 0 0;color:#1a4268;font-weight:700;font-size:1.05rem}.draw-overlay-card{border-color:#89a2bc;box-shadow:0 18px 36px #1f3e6218,0 0 0 6px #89a2bc2b}.draw-overlay-title{color:#43627e}.loss-overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;pointer-events:none;z-index:999;animation:loss-fade-in .32s ease-out}.loss-overlay-burst{position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(circle at 20% 20%,#8b4545 0,#8b4545 8px,#8b454500 10px),radial-gradient(circle at 80% 22%,#a63c3c 0,#a63c3c 8px,#a63c3c00 10px),radial-gradient(circle at 18% 75%,#5a5a5a 0,#5a5a5a 7px,#5a5a5a00 9px),radial-gradient(circle at 82% 78%,#4a4a4a 0,#4a4a4a 7px,#4a4a4a00 9px),radial-gradient(circle at 50% 12%,#6b3e3e 0,#6b3e3e 7px,#6b3e3e00 9px),radial-gradient(circle at 50% 88%,#7a3a3a 0,#7a3a3a 7px,#7a3a3a00 9px);opacity:.45;animation:loss-burst-sink 2.2s ease-in-out infinite}.loss-overlay-card{background:linear-gradient(135deg,#f5f5f5,#e8e8e8);border:2px solid #c44444;border-radius:18px;padding:18px 20px;min-width:280px;max-width:calc(100vw - 32px);text-align:center;box-shadow:0 18px 36px #1a1a1a2a,0 0 0 6px #c4444433;animation:loss-card-fall .52s cubic-bezier(.35,0,.65,1)}.loss-overlay-title{margin:0;font-size:2rem;line-height:1.05;color:#c44444;text-transform:uppercase;letter-spacing:.04em}@keyframes win-fade-in{0%{opacity:0}to{opacity:1}}@keyframes win-card-pop{0%{transform:scale(.72) rotate(-3deg);opacity:0}60%{transform:scale(1.06) rotate(1deg);opacity:1}to{transform:scale(1) rotate(0)}}@keyframes loss-fade-in{0%{opacity:0;background-color:#0000}to{opacity:1;background-color:#0000001a}}@keyframes loss-card-fall{0%{transform:translateY(-60px) rotate(2deg);opacity:0}60%{transform:translateY(2px) rotate(-1deg);opacity:1}to{transform:translateY(0) rotate(0)}}@keyframes loss-burst-sink{0%,to{transform:scale(1) rotate(0);opacity:.42}50%{transform:scale(.95) rotate(-3deg);opacity:.58}}@keyframes win-burst-float{0%,to{transform:scale(1) rotate(0);opacity:.52}50%{transform:scale(1.08) rotate(4deg);opacity:.72}}