*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:100vh;overflow:hidden;user-select:none}
#app{max-width:420px;margin:0 auto;height:100vh;display:flex;flex-direction:column;position:relative}

/* 顶部信息栏 */
.top-bar{display:flex;justify-content:space-between;align-items:center;padding:8px 16px;color:#fff;font-size:14px;z-index:10;padding-top:max(8px,env(safe-area-inset-top))}
.top-bar .level{font-size:18px;font-weight:700}
.top-bar .timer{font-size:16px;opacity:.9}
.btn-small{background:rgba(255,255,255,.2);border:none;color:#fff;padding:4px 12px;border-radius:16px;font-size:13px;cursor:pointer;backdrop-filter:blur(4px)}
.btn-small:active{transform:scale(.95)}

/* 游戏区域 */
.game-area{flex:1;position:relative;margin:4px 12px;border-radius:16px;background:rgba(255,255,255,.1);backdrop-filter:blur(8px);overflow:hidden}

/* 木板 */
.plate{position:absolute;cursor:default;transition:opacity .4s,transform .4s;filter:drop-shadow(0 3px 0 rgba(80,50,20,.85)) drop-shadow(0 6px 0 rgba(60,35,15,.65)) drop-shadow(0 9px 0 rgba(45,25,10,.5)) drop-shadow(0 12px 0 rgba(30,18,5,.35)) drop-shadow(0 16px 10px rgba(0,0,0,.3))}
.plate.removing{opacity:0;transform:scale(.85);pointer-events:none}
/* 3D斜面高光+暗角 */
.plate::after{content:'';position:absolute;inset:0;background:linear-gradient(155deg,rgba(255,255,255,.35) 0%,rgba(255,255,255,.12) 10%,transparent 35%,transparent 65%,rgba(0,0,0,.12) 85%,rgba(0,0,0,.25) 100%);pointer-events:none}

/* 螺丝 */
.screw{position:absolute;width:38px;height:38px;border-radius:50%;cursor:pointer;transition:transform .15s,opacity .15s;z-index:1;display:flex;align-items:center;justify-content:center;background-size:contain;background-position:center;background-repeat:no-repeat}
/* 十字槽 */
.screw::before{content:none}
.screw::after{content:none}
/* 光泽 */
.screw-shine{position:absolute;width:12px;height:8px;background:radial-gradient(ellipse,rgba(255,255,255,.5),transparent);top:6px;left:8px;border-radius:50%;pointer-events:none}
.screw:active:not(.blocked){transform:scale(.88)}
.screw.blocked{cursor:not-allowed;opacity:.45;filter:brightness(.75)}
.screw.blocked .lock-badge{display:block}
.screw .lock-badge{display:none;position:absolute;top:-5px;right:-5px;font-size:11px;z-index:2}
.screw.fly-out{animation:screwOut .45s ease-in forwards;pointer-events:none}

@keyframes screwOut{
  0%{transform:rotate(0) scale(1);opacity:1}
  40%{transform:rotate(360deg) scale(.5);opacity:1}
  100%{transform:rotate(720deg) scale(0);opacity:0}
}

/* 收集槽 */
.slot-bar{height:68px;margin:6px 12px 10px;background:rgba(255,255,255,.15);border-radius:16px;display:flex;align-items:center;padding:0 8px;gap:4px;backdrop-filter:blur(8px)}
.slot{width:calc((100% - 24px)/7);aspect-ratio:1;border-radius:50%;background:rgba(255,255,255,.08);border:2px dashed rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;transition:all .25s;position:relative}
.slot.filled{border:none;animation:slotPop .3s ease-out}
.slot.matched{animation:slotBoom .45s ease-out forwards}
.slot .mini-screw{width:34px;height:34px;border-radius:50%;position:relative;background-size:contain;background-position:center;background-repeat:no-repeat}
.slot .mini-cross::before,.slot .mini-cross::after{content:'';position:absolute;background:rgba(0,0,0,.25);border-radius:1px}
.slot .mini-cross::before{width:12px;height:2px;top:50%;left:50%;transform:translate(-50%,-50%)}
.slot .mini-cross::after{width:2px;height:12px;top:50%;left:50%;transform:translate(-50%,-50%)}

@keyframes slotPop{0%{transform:scale(0) rotate(-180deg)}100%{transform:scale(1) rotate(0)}}
@keyframes slotBoom{0%{transform:scale(1);opacity:1}50%{transform:scale(1.3);filter:brightness(2)}100%{transform:scale(0);opacity:0}}

/* 道具栏 */
.tools-bar{display:flex;justify-content:center;gap:14px;padding:0 16px 16px;padding-bottom:max(16px,env(safe-area-inset-bottom))}
.tool-btn{display:flex;flex-direction:column;align-items:center;background:rgba(255,255,255,.2);border:none;color:#fff;padding:8px 16px;border-radius:12px;font-size:12px;cursor:pointer;min-width:72px;backdrop-filter:blur(4px);position:relative;transition:transform .1s}
.tool-btn:active{transform:scale(.94)}
.tool-btn .icon{font-size:22px;margin-bottom:2px}
.tool-btn .count{font-size:10px;opacity:.7}
.tool-btn.disabled{opacity:.35;cursor:not-allowed}
.tool-btn .badge{position:absolute;top:-5px;right:-5px;background:#e74c3c;color:#fff;font-size:9px;font-weight:700;width:16px;height:16px;border-radius:50%;display:flex;align-items:center;justify-content:center}

/* 弹窗 */
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.55);display:none;align-items:center;justify-content:center;z-index:300;backdrop-filter:blur(4px)}
.modal-bg.show{display:flex}
.modal{background:#fff;border-radius:20px;padding:28px 24px;text-align:center;max-width:300px;width:88%;animation:mIn .25s ease-out}
@keyframes mIn{0%{transform:scale(.8);opacity:0}100%{transform:scale(1);opacity:1}}
.modal h2{font-size:24px;margin-bottom:6px}
.modal p{color:#555;margin-bottom:14px;font-size:14px;line-height:1.5}
.m-btn{display:block;width:100%;padding:11px;border:none;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;margin-top:7px;transition:transform .1s}
.m-btn:active{transform:scale(.97)}
.m-btn.primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}
.m-btn.green{background:linear-gradient(135deg,#00b894,#00cec9);color:#fff}
.m-btn.gray{background:#f0f0f0;color:#333}

/* 开始界面 */
.start-screen{position:fixed;inset:0;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:200;color:#fff}
.start-screen.hidden{display:none}
.start-screen h1{font-size:44px;margin-bottom:4px;text-shadow:0 3px 12px rgba(0,0,0,.2)}
.start-screen .sub{font-size:16px;opacity:.8;margin-bottom:28px}
.logo-screw-wrap{width:90px;height:90px;margin-bottom:20px;animation:logoFloat 2.5s ease-in-out infinite}
@keyframes logoFloat{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-8px) rotate(10deg)}}
.logo-screw{width:90px;height:90px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#ff6b6b,#e74c3c,#c0392b);box-shadow:0 6px 24px rgba(0,0,0,.3),inset 0 3px 6px rgba(255,255,255,.3),inset 0 -3px 6px rgba(0,0,0,.2);position:relative}
.logo-screw::before{content:'';position:absolute;width:40px;height:6px;background:rgba(255,255,255,.3);border-radius:3px;top:42px;left:25px}
.logo-screw::after{content:'';position:absolute;width:6px;height:40px;background:rgba(255,255,255,.3);border-radius:3px;top:25px;left:42px}
.start-btn{background:#fff;color:#764ba2;border:none;padding:14px 48px;border-radius:30px;font-size:18px;font-weight:700;cursor:pointer;box-shadow:0 4px 20px rgba(0,0,0,.2);margin-bottom:12px}
.start-btn:active{transform:scale(.96)}
.name-input{background:rgba(255,255,255,.2);border:2px solid rgba(255,255,255,.4);color:#fff;padding:10px 20px;border-radius:20px;font-size:15px;text-align:center;width:200px;margin-bottom:14px;outline:none}
.name-input::placeholder{color:rgba(255,255,255,.5)}
.lb-btn{background:transparent;border:2px solid rgba(255,255,255,.3);color:#fff;padding:8px 28px;border-radius:20px;font-size:13px;cursor:pointer}

/* 排行榜 */
.lb-list{max-height:280px;overflow-y:auto;text-align:left;margin:10px 0;-webkit-overflow-scrolling:touch;touch-action:pan-y}
.lb-item{display:flex;align-items:center;padding:5px 10px;border-radius:8px;font-size:13px}
.lb-item:nth-child(odd){background:#f7f7f7}
.lb-item .rk{width:28px;font-weight:700;color:#764ba2}
.lb-item .nm{flex:1}
.lb-item .lv{color:#e74c3c;font-weight:600;font-size:12px}

/* 螺丝颜色 */
.c0{background:url(../assets/screw_0.png) center/contain no-repeat}
.c1{background:url(../assets/screw_1.png) center/contain no-repeat}
.c2{background:url(../assets/screw_2.png) center/contain no-repeat}
.c3{background:url(../assets/screw_3.png) center/contain no-repeat}
.c4{background:url(../assets/screw_4.png) center/contain no-repeat}
.c5{background:url(../assets/screw_5.png) center/contain no-repeat}
.c6{background:url(../assets/screw_6.png) center/contain no-repeat}
.c7{background:url(../assets/screw_7.png) center/contain no-repeat}

/* 木板样式 - 8种高品质Gemini纹理 */
.pw0{background:url(../assets/tex_0.png) center/cover}
.pw1{background:url(../assets/tex_1.png) center/cover}
.pw2{background:url(../assets/tex_2.png) center/cover}
.pw3{background:url(../assets/tex_3.png) center/cover}
.pw4{background:url(../assets/tex_4.png) center/cover}
.pw5{background:url(../assets/tex_5.png) center/cover}
.pw6{background:url(../assets/tex_6.png) center/cover}
.pw7{background:url(../assets/tex_7.png) center/cover}

/* 教程 */
.tut{position:absolute;bottom:12px;left:50%;transform:translateX(-50%);background:rgba(0,0,0,.7);color:#fff;padding:7px 14px;border-radius:18px;font-size:12px;white-space:nowrap;z-index:20;animation:tutPulse 2s infinite}
@keyframes tutPulse{0%,100%{opacity:1}50%{opacity:.5}}

/* 粒子 */
.spark{position:fixed;width:6px;height:6px;border-radius:50%;pointer-events:none;z-index:999;animation:sparkAnim .5s ease-out forwards}
@keyframes sparkAnim{0%{transform:scale(1);opacity:1}100%{transform:scale(0);opacity:0}}

/* 连击 */
.combo-text{position:fixed;top:40%;left:50%;transform:translate(-50%,-50%);font-size:32px;font-weight:900;color:#ffd700;text-shadow:0 0 15px rgba(255,215,0,.6);pointer-events:none;animation:comboUp .7s ease-out forwards;z-index:50}
@keyframes comboUp{0%{opacity:1;transform:translate(-50%,-50%) scale(.6)}30%{transform:translate(-50%,-50%) scale(1.15)}100%{opacity:0;transform:translate(-50%,-70%) scale(1)}}

/* 菜单弹窗 */
.menu-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:10px 0}
.menu-item{padding:12px 8px;border-radius:12px;border:2px solid #eee;background:#fafafa;cursor:pointer;font-size:14px;font-weight:600;color:#333;transition:all .1s}
.menu-item:active{transform:scale(.96);background:#f0f0f0}
.menu-item .mi{font-size:22px;display:block;margin-bottom:2px}

/* 横屏提示 */
@media (orientation:landscape) and (max-height:500px){
  body::before{content:'📱 请竖屏游玩';position:fixed;inset:0;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:24px;font-weight:700;display:flex;align-items:center;justify-content:center;z-index:99999}
}