*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #080812;--surface: #111128;--surface2: #16163a;--border: #2a2a50;--accent: #7c4dff;--accent2: #e040fb;--green: #00e676;--gold: #ffd740;--red: #ff5252;--text: #e8e8f0;--text-dim: #8888aa;--radius: 12px;--shadow: 0 8px 40px rgba(0,0,0,.6);font-family:Poppins,system-ui,sans-serif;scroll-behavior:smooth}html{font-size:16px}body{background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden}.gradient-text{background:linear-gradient(135deg,var(--accent),var(--accent2),var(--gold));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 24px;border-radius:10px;font-family:inherit;font-size:.95rem;font-weight:700;cursor:pointer;border:none;text-decoration:none;transition:transform .18s,box-shadow .18s,opacity 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var(--border);color:var(--text);font-family:inherit;font-size:.95rem;font-weight:700;cursor:pointer;transition:border-color .2s,background .2s;display:flex;flex-direction:column;align-items:center;gap:4px}.color-chip:hover{border-color:var(--accent)}.color-chip.active{border-color:var(--green);background:#00e6761a;color:var(--green)}.color-note{font-size:.72rem;color:var(--text-dim);font-weight:400}.color-chip.active .color-note{color:#00e676b3}.diff-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:20px;font-size:.82rem;font-weight:700;letter-spacing:.04em;margin-bottom:10px;border:1.5px solid transparent}.diff-badge-easy{background:#00e6761f;border-color:var(--green);color:var(--green)}.diff-badge-medium{background:#ffd7401f;border-color:var(--gold);color:var(--gold)}.diff-badge-difficult{background:#ff52521f;border-color:var(--red);color:var(--red)}:root{--vh: 100vh}@supports (height: 100dvh){:root{--vh: 100dvh}}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;overscroll-behavior:none;touch-action:manipulation}body{min-height:var(--vh);overscroll-behavior:none;-webkit-tap-highlight-color:transparent}.board-wrap{touch-action:none}.input,.chat-input{font-size:16px}.btn,.control-btn,.back-btn,.time-chip,.color-chip,.diff-chip{min-height:44px}.copy-btn{min-height:40px;min-width:64px}.chat-close{min-width:44px;min-height:44px;font-size:1.1rem}.chat-send-btn{width:44px;height:44px}.emoji-toggle{min-width:40px;min-height:40px;font-size:1.3rem}.emoji-btn{min-width:40px;min-height:40px;font-size:1.4rem}.chat-toggle-btn{width:52px;height:52px}.home-wrap{min-height:var(--vh);justify-content:center;padding:calc(32px + env(safe-area-inset-top)) calc(16px + env(safe-area-inset-right)) calc(40px + env(safe-area-inset-bottom)) calc(16px + env(safe-area-inset-left))}.game-room,.game-layout{min-height:var(--vh)}.toast{top:calc(env(safe-area-inset-top) + 12px);white-space:normal;text-align:center;max-width:calc(100vw - 24px)}@media (max-width: 600px){.home-wrap{gap:20px}.home-hero{width:100%}.home-cards,.mode-select{width:100%;max-width:none;margin-top:0}.home-card{min-width:0;max-width:none;width:100%;flex:1 1 100%}.mode-card{min-width:0;max-width:none;width:100%;flex:1 1 100%;padding:22px 20px}.time-chip{min-width:calc(50% - 4px)}.error-msg{max-width:none}.game-code-share{flex-wrap:wrap}}@media (orientation: landscape) and (max-height: 600px){.home-wrap{justify-content:flex-start;gap:14px;padding-top:calc(14px + env(safe-area-inset-top));padding-bottom:calc(24px + env(safe-area-inset-bottom))}.home-title{font-size:1.8rem;margin-bottom:6px}.hero-badge{margin-bottom:8px}.mode-card{padding:16px 18px}.home-card{max-width:420px}.home-title{font-size:1.5rem}.home-subtitle{font-size:.88rem;line-height:1.4}.card{padding:14px}.waiting-spinner{font-size:1.4rem;margin-bottom:2px}.waiting-text{margin-bottom:8px;font-size:.85rem}.waiting-room .btn{margin-top:8px!important}.home-form{gap:8px}.home-wrap{gap:10px;padding-top:calc(8px + env(safe-area-inset-top));padding-bottom:calc(12px + env(safe-area-inset-bottom))}.hero-badge{padding:3px 12px}}@media (max-width: 900px){.chat-panel{top:calc(env(safe-area-inset-top) + 8px);bottom:auto;left:calc(8px + env(safe-area-inset-left));right:calc(8px + env(safe-area-inset-right));width:auto;max-height:min(calc(var(--vh) * .62),440px);z-index:250}}@media (orientation: portrait) and (max-width: 900px){.game-room{height:var(--vh);min-height:0;overflow:hidden;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}.game-layout{--board: max(200px, min( calc(100vw - 16px - env(safe-area-inset-left) - env(safe-area-inset-right)) , calc(var(--vh) - 272px - env(safe-area-inset-top) - env(safe-area-inset-bottom)), 720px));flex-direction:column;flex-wrap:nowrap;align-items:center;justify-content:flex-start;gap:6px;padding:8px;height:100%;min-height:0}.board-section{width:var(--board);gap:6px}.board-wrap,.player-card{width:var(--board)}.player-card{padding:6px 10px;min-height:46px;gap:8px}.player-name{font-size:.88rem}.captured-piece{font-size:.9rem}.clock-badge{padding:4px 10px;font-size:1rem}.sidebar{width:var(--board);max-width:none;flex:1 1 0;min-height:0;display:grid;grid-template-columns:auto minmax(0,1fr) auto;grid-template-rows:auto auto minmax(0,1fr);column-gap:6px;row-gap:6px;align-items:stretch;padding-top:0}.diff-badge{grid-column:1;grid-row:1;align-self:center;margin:0;padding:4px 10px;font-size:.7rem}.status-bar{grid-column:2;grid-row:1;padding:8px 10px;font-size:.88rem;display:flex;align-items:center;justify-content:center}.chat-toggle-btn{grid-column:3;grid-row:1;position:relative;right:auto;bottom:auto;width:44px;height:44px;font-size:1.15rem;align-self:center}.controls-wrap{grid-column:1 / -1;grid-row:2;flex-wrap:nowrap;gap:6px}.control-btn{min-width:0;padding:6px 8px;font-size:.8rem}.move-history-card{grid-column:1 / -1;grid-row:3;min-width:0;min-height:0;padding:6px 8px;display:flex;flex-direction:column}.card-title-sm{display:none}.move-history{flex:1;min-height:0;max-height:none;flex-direction:row;flex-wrap:wrap;align-content:flex-start;overflow-x:hidden;overflow-y:auto;gap:2px 10px}.move-history-empty{padding:4px 0;text-align:left}.move-row{display:flex;flex:none;gap:4px;padding:2px 6px;background:none!important;white-space:nowrap}.move-num{min-width:0}}@media (orientation: landscape) and (max-height: 600px){.game-room{height:var(--vh);min-height:0;overflow:hidden;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}.game-layout{--board: max(200px, min( calc(var(--vh) - 16px - env(safe-area-inset-top) - env(safe-area-inset-bottom)), calc(100vw - 274px - env(safe-area-inset-left) - env(safe-area-inset-right)) , 720px));display:grid;grid-template-columns:var(--board) minmax(230px,420px);grid-template-rows:auto minmax(0,1fr) auto;column-gap:8px;row-gap:6px;justify-content:center;align-content:center;align-items:stretch;padding:8px;height:100%;min-height:0;flex-wrap:nowrap}.board-section{display:contents}.board-wrap{grid-column:1;grid-row:1 / span 3;width:var(--board);align-self:center}.board-section>.player-card:first-child{grid-column:2;grid-row:1}.board-section>.player-card:last-child{grid-column:2;grid-row:3}.player-card{width:auto;padding:6px 10px;min-height:46px;gap:8px}.player-name{font-size:.88rem}.clock-badge{padding:4px 10px;font-size:1rem}.sidebar{grid-column:2;grid-row:2;width:auto;max-width:none;min-height:0;padding-top:0;gap:6px;overflow:hidden}.diff-badge{margin:0;align-self:flex-start;padding:3px 10px;font-size:.7rem}.status-bar{padding:8px 10px;font-size:.88rem}.controls-wrap{flex-wrap:nowrap;gap:6px}.control-btn{min-width:0;padding:6px 8px;font-size:.8rem}.move-history-card{flex:1 1 0;min-height:0;display:flex;flex-direction:column;padding:8px 10px}.card-title-sm{margin-bottom:4px}.move-history{flex:1;min-height:0;max-height:none}.chat-toggle-btn{position:relative;right:auto;bottom:auto;align-self:flex-end;width:44px;height:44px;flex:none;margin-top:auto;font-size:1.15rem}.chat-panel{left:auto;width:340px;right:calc(8px + env(safe-area-inset-right));max-height:calc(var(--vh) - 16px - env(safe-area-inset-top))}}@media (max-height: 480px){.game-over-modal{padding:14px 20px;max-height:calc(var(--vh) - 16px);overflow:auto}.game-over-icon{font-size:2.4rem;margin-bottom:2px}.game-over-title{font-size:1.4rem}.game-over-reason{margin-bottom:12px}.promotion-modal{padding:12px 18px}.promo-title{margin-bottom:8px}.promo-piece-btn{width:56px;height:56px;font-size:2rem}}