@import url('https://fonts.googleapis.com/css2?family=Pretendard:wght@400;500;600;700&display=swap');

:root {
  --accent:#3772FF; --danger:#DF2935;
  --male-point:#3772FF;    --male-bg:#EBF1FF;
  --female-point:#F472B6;  --female-bg:#FDF2F8;
  --neutral-point:#6B7280; --neutral-bg:#F3F4F6;
  --desk-bg:#F5F3FF; --desk-border:#8B5CF6; --desk-text:#6D28D9;
  --radius-lg:20px; --radius-md:12px; --radius-sm:10px;
  --es:cubic-bezier(0.34,1.56,0.64,1);
  --eo:cubic-bezier(0.4,0,0.2,1);
  --tr:background-color .3s cubic-bezier(0.4,0,0.2,1), color .3s cubic-bezier(0.4,0,0.2,1), border-color .3s cubic-bezier(0.4,0,0.2,1), box-shadow .3s cubic-bezier(0.4,0,0.2,1), opacity .3s cubic-bezier(0.4,0,0.2,1), transform .3s cubic-bezier(0.4,0,0.2,1), filter .3s cubic-bezier(0.4,0,0.2,1);
  --swatch--clay:#D97757;
}
[data-theme="light"]{
  --bg:#fff; --surface:#F9FAFB; --surface2:#F3F4F6; --border:#E5E7EB;
  --text:#111827; --text-sub:#6B7280;
  --island-bg:rgba(255,255,255,0.95); --island-border:#E5E7EB;
  --shadow:0 4px 15px rgba(0,0,0,0.06); --overlay:rgba(0,0,0,0.45);
}
[data-theme="dark"]{
  --bg:#000; --surface:#121212; --surface2:#1E1E1E; --border:#2D2D2D;
  --text:#F9FAFB; --text-sub:#9CA3AF;
  --swatch--clay:#ffffff;
  --island-bg:rgba(20,20,20,0.95); --island-border:#2D2D2D;
  --shadow:0 10px 30px rgba(0,0,0,0.8); --overlay:rgba(0,0,0,0.75);
  --male-bg:rgba(55,114,255,0.15); --female-bg:rgba(244,114,182,0.15);
  --neutral-bg:rgba(107,114,128,0.2); --desk-bg:rgba(139,92,246,0.15); --desk-text:#A78BFA;
}
@media(prefers-color-scheme:light){[data-theme="system"]{
  --bg:#fff;--surface:#F9FAFB;--surface2:#F3F4F6;--border:#E5E7EB;
  --text:#111827;--text-sub:#6B7280;
  --island-bg:rgba(255,255,255,0.95);--island-border:#E5E7EB;
  --shadow:0 4px 15px rgba(0,0,0,0.06);--overlay:rgba(0,0,0,0.45);
}}
@media(prefers-color-scheme:dark){[data-theme="system"]{
  --bg:#000;--surface:#121212;--surface2:#1E1E1E;--border:#2D2D2D;
  --text:#F9FAFB;--text-sub:#9CA3AF;
  --island-bg:rgba(20,20,20,0.95);--island-border:#2D2D2D;
  --shadow:0 10px 30px rgba(0,0,0,0.8);--overlay:rgba(0,0,0,0.75);
  --male-bg:rgba(55,114,255,0.15);--female-bg:rgba(244,114,182,0.15);
  --neutral-bg:rgba(107,114,128,0.2);--desk-bg:rgba(139,92,246,0.15);--desk-text:#A78BFA;
  --swatch--clay:#ffffff;
}}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html,*{scrollbar-width:none;-ms-overflow-style:none;}
html::-webkit-scrollbar,body::-webkit-scrollbar,*::-webkit-scrollbar{width:0;height:0;display:none;background:transparent;}
html{width:100%;height:100%;overflow:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;}
body{width:100%;height:100%;min-height:100vh;background:var(--bg);color:var(--text);display:flex;justify-content:center;align-items:center;font-family:'Pretendard',sans-serif;overflow:hidden;transition:background .4s,color .4s;}
h1,h2,h3,.tool-title,.section-label,.group-card-title{text-wrap:balance;}
p,li,.modal-body,.history-preview,.legal-desc,.pick-history-label,#toast{text-wrap:pretty;}

@keyframes fadeUp{from{opacity:0;transform:translateY(22px) scale(0.97)}to{opacity:1;transform:none}}
#wrapper{display:flex;flex-direction:column;align-items:center;gap:20px;width:100%;animation:fadeUp .5s var(--es) both;}
#dynamic-island{animation:fadeUp .45s var(--es) .06s both;}

#dynamic-island{
  background:var(--island-bg);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border:1px solid var(--island-border);border-radius:28px;padding:6px 10px;
  display:flex;align-items:center;gap:4px;box-shadow:var(--shadow);z-index:1000;
  transition:box-shadow .3s;
}
#dynamic-island:hover{box-shadow:0 8px 30px rgba(55,114,255,0.18);}
.btn-divider{width:1px;height:18px;background:var(--border);margin:0 4px;flex-shrink:0;}
.button{
  width:40px;height:40px;background:var(--surface2);border:none;
  border-radius:var(--radius-sm);color:var(--text);
  display:flex;justify-content:center;align-items:center;
  cursor:pointer;font-size:14px;transition:var(--tr);flex-shrink:0;
  position:relative;overflow:hidden;isolation:isolate;
}
.button:hover{background:var(--accent);color:#fff;transform:translateY(-2px) scale(1.05);}
.button:active{transform:scale(.96);}
.button:disabled{cursor:not-allowed;opacity:.58;transform:none;filter:saturate(.75);}
.button:disabled:hover{transform:none;opacity:.58;}

/* ── 버튼별 호버 배경/효과 ── */
#lock-button:active{transform:scale(.96) !important;}
#start-button{background:var(--accent);color:#fff;}
#start-button:hover{opacity:.88;transform:translateY(-2px) scale(1.05);}
#reset-button{color:var(--danger);}
#reset-button:hover{background:var(--danger);color:#fff;animation:resetFlash .9s ease infinite;}
#bug-main-button{color:var(--danger);}
#bug-main-button:hover{animation:bugGlitchBg .12s steps(1) infinite;color:#fff;}
#dev-button:hover{background:#000;color:#39FF14 !important;transform:translateY(-2px) scale(1.05);}
#dev-button:active{transform:scale(.96) !important;}
#save-main-button:hover{background:var(--accent);animation:exportGlow .6s var(--eo) infinite;}
#upload-button:hover{background:var(--accent);animation:importGlow .5s var(--eo) infinite;}
#sync-button.sync-on{background:var(--accent);color:#fff;}
#sync-button.syncing i{animation:syncSpin .8s linear infinite;}
#history-button:hover{background:var(--accent);}
#settings-button:hover{background:linear-gradient(135deg,var(--accent),#7C9CFF);animation:gearSpinBg 1.1s linear infinite;}
#patch-button:hover{background:var(--accent);animation:unrollGlow .5s var(--es) infinite;}
#info-button::after{display:none;}
#info-button:hover{background:var(--accent);position:relative;animation:infoGlow 1.6s var(--eo) infinite;}
@keyframes infoGlow{
  0%,58%,100%{box-shadow:none;}
  15%{box-shadow:0 0 18px rgba(55,114,255,.8);}
  40%{box-shadow:0 0 6px rgba(55,114,255,.2);}
}
@keyframes syncSpin{to{transform:rotate(360deg)}}
#info-button:hover::before{display:none;}

@keyframes lockFlash{
  0%,52%,100%{box-shadow:0 0 0 rgba(223,41,53,0);outline:2px solid rgba(223,41,53,0);}
  15%{box-shadow:0 0 18px rgba(223,41,53,1),inset 0 0 8px rgba(223,41,53,.4);outline:2px solid rgba(223,41,53,.9);}
  40%{box-shadow:0 0 8px rgba(223,41,53,.4);outline:2px solid rgba(223,41,53,.3);}
}
#lock-button:hover{background:var(--text-sub);color:#fff !important;transform:translateY(-2px) scale(1.05);animation:lockFlash 1.8s linear infinite;}

/* ── Wide Wash ::after ── */
.button::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.22) 50%,transparent);
  transform:translateX(-110%);pointer-events:none;z-index:1;
}
.button.entering::after{animation:wideWashIn .48s ease forwards;}
.button.leaving::after{animation:wideWashOut .45s ease forwards;}
@keyframes wideWashIn{from{transform:translateX(-110%)}to{transform:translateX(110%)}}
@keyframes wideWashOut{from{transform:translateX(110%)}to{transform:translateX(-130%)}}

/* ── 아이콘 공통 ── */
.button i{position:relative;z-index:2;will-change:transform;transition:transform .22s var(--es),filter .22s var(--eo);}
.button:hover i{transform:translateY(-1px) scale(1.06);}

/* ── 버튼별 아이콘 애니메이션 ── */
@keyframes iconShuffle{
  0%,62%,100%{transform:translateX(0) rotate(0);}
  8%{transform:translateX(-6px) rotate(-22deg);}18%{transform:translateX(6px) rotate(22deg);}
  28%{transform:translateX(-5px) rotate(-16deg);}38%{transform:translateX(5px) rotate(16deg);}
  48%{transform:translateX(-2px) rotate(-8deg);}56%{transform:translateX(2px) rotate(8deg);}
}
#start-button:hover i{animation:iconShuffle 1.6s var(--es) infinite;}

@keyframes iconRewind{0%{transform:rotate(0);}38%{transform:rotate(-360deg);}100%{transform:rotate(-360deg);}}
#reset-button:hover i{animation:iconRewind 1.5s cubic-bezier(0.25,1,0.5,1) infinite;}
@keyframes resetFlash{0%,100%{box-shadow:none;}50%{box-shadow:0 0 20px var(--danger);}}

@keyframes iconExport{
  0%,55%,100%{transform:translateY(0);opacity:1;}
  20%{transform:translateY(-11px);opacity:0;}21%{transform:translateY(9px);opacity:0;}
  40%{transform:translateY(0);opacity:1;}
}
#save-main-button:hover i{animation:iconExport 1.5s var(--eo) infinite;}
@keyframes exportGlow{0%{box-shadow:0 0 0 rgba(55,114,255,0);}40%{box-shadow:0 -8px 16px -4px rgba(55,114,255,.7);}100%{box-shadow:0 0 0 rgba(55,114,255,0);}}

@keyframes iconImport{
  0%,55%,100%{transform:translateY(0);opacity:1;}
  20%{transform:translateY(11px);opacity:0;}21%{transform:translateY(-8px);opacity:0;}
  40%{transform:translateY(0);opacity:1;}
}
#upload-button:hover i{animation:iconImport 1.5s var(--eo) infinite;}
@keyframes importGlow{0%{box-shadow:0 0 0 rgba(55,114,255,0);}50%{box-shadow:0 8px 16px -4px rgba(55,114,255,.7);}100%{box-shadow:0 0 0 rgba(55,114,255,0);}}

@keyframes iconTick{from{transform:rotate(0);}to{transform:rotate(-360deg);}}
#history-button:hover i{animation:iconTick 1.8s linear infinite;}

@keyframes iconSpin{from{transform:rotate(0) scale(1.08);}to{transform:rotate(360deg) scale(1.08);}}
#settings-button:hover i{animation:iconSpin 1.1s linear infinite;color:#fff;}
@keyframes gearSpinBg{0%,100%{filter:hue-rotate(0deg);}50%{filter:hue-rotate(50deg);}}

@keyframes iconUnroll{
  0%,65%,100%{transform:scaleX(1) rotate(0);}
  12%{transform:scaleX(0.75) rotate(-5deg);}28%{transform:scaleX(1.5) rotate(3deg);}
  42%{transform:scaleX(1.2) rotate(-2deg);}55%{transform:scaleX(1) rotate(0);}
}
#patch-button:hover i{animation:iconUnroll 1.6s var(--es) infinite;}
@keyframes unrollGlow{0%,100%{box-shadow:inset 0 0 0 rgba(255,255,255,0);}50%{box-shadow:inset 6px 0 10px -6px rgba(255,255,255,.6),inset -6px 0 10px -6px rgba(255,255,255,.6);}}

@keyframes iconBounce{0%,58%,100%{transform:translateY(0);}12%{transform:translateY(-9px);}22%{transform:translateY(0);}34%{transform:translateY(-5px);}44%{transform:translateY(0);}}
@keyframes infoBlink{0%,58%,100%{filter:none;}12%{filter:brightness(3) drop-shadow(0 0 6px #fff);}22%{filter:brightness(1.3);}34%{filter:brightness(2) drop-shadow(0 0 3px #fff);}}
#info-button:hover i{animation:iconBounce 1.6s var(--eo) infinite, infoBlink 1.6s var(--eo) infinite;}

@keyframes bugGlitchBg{
  0%{background:var(--danger);}16%{background:#39FF14;}32%{background:#FF00FF;}
  48%{background:var(--danger);}64%{background:#00F0FF;}80%{background:#FFEA00;color:#fff;}100%{background:var(--danger);color:#fff;}
}
@keyframes iconWiggle{
  0%{transform:translate(0,0) rotate(0) scale(1);}8%{transform:translate(-9px,-6px) rotate(-20deg) scale(.9);}
  16%{transform:translate(8px,7px) rotate(15deg) scale(1.1);}24%{transform:translate(7px,-8px) rotate(-12deg) scale(1);}
  32%{transform:translate(-8px,8px) rotate(18deg) scale(.95);}40%{transform:translate(-6px,-3px) rotate(-8deg) scale(1.05);}
  48%{transform:translate(9px,2px) rotate(10deg) scale(.92);}56%{transform:translate(2px,-9px) rotate(-15deg) scale(1.08);}
  64%{transform:translate(-9px,4px) rotate(6deg) scale(1);}72%{transform:translate(5px,9px) rotate(-10deg) scale(.96);}
  80%{transform:translate(-3px,-7px) rotate(14deg) scale(1.1);}88%{transform:translate(7px,-2px) rotate(-6deg) scale(.94);}
  100%{transform:translate(0,0) rotate(0) scale(1);}
}
#bug-main-button:hover i{position:absolute;animation:iconWiggle .9s steps(12,end) infinite;}

/* ── Dev 버튼 매트릭스 ── */
#dev-button{position:relative;}
#dev-button .bits{position:absolute;inset:0;overflow:hidden;border-radius:inherit;display:flex;justify-content:space-between;padding:0 2px;opacity:0;transition:opacity .12s;pointer-events:none;z-index:1;}
#dev-button:hover .bits{opacity:1;}
#dev-button .bits .col{position:relative;flex:1;height:100%;}
#dev-button .bits .col span{position:absolute;left:0;right:0;text-align:center;font-family:'Courier New',monospace;font-size:8px;font-weight:700;line-height:1.05;color:#39FF14;text-shadow:0 0 4px #39FF14,0 0 8px #39FF14;animation:bitsFall linear infinite;}
#dev-button .bits .col:nth-child(1) span{animation-duration:.38s;}
#dev-button .bits .col:nth-child(2) span{animation-duration:.3s;animation-delay:-.1s;}
#dev-button .bits .col:nth-child(3) span{animation-duration:.42s;animation-delay:-.05s;}
#dev-button .bits .col:nth-child(4) span{animation-duration:.34s;animation-delay:-.18s;}
@keyframes bitsFall{0%{transform:translateY(-44px);opacity:0;}10%{opacity:1;}85%{opacity:1;}100%{transform:translateY(44px);opacity:0;}}
@keyframes iconType{0%,100%{opacity:1;transform:translateY(-1px) scale(1.08);filter:drop-shadow(0 0 4px #39FF14);}50%{opacity:.35;transform:translateY(-1px) scale(1.08);filter:drop-shadow(0 0 1px #39FF14);}}
#dev-button:hover i{animation:iconType .35s steps(2,end) infinite;}

/* ── 잠금 ── */
@keyframes iconShake{
  0%,52%,100%{transform:translateX(0);}6%{transform:translateX(-7px);}12%{transform:translateX(7px);}
  18%{transform:translateX(-7px);}24%{transform:translateX(7px);}30%{transform:translateX(-5px);}
  36%{transform:translateX(5px);}42%{transform:translateX(-2px);}48%{transform:translateX(2px);}
}
#lock-button:hover i{animation:iconShake 1.8s linear infinite;}

@media(prefers-reduced-motion:reduce){.button,.button i,.button::after,.button::before,#start-button.pulsing{animation:none !important;transition:none !important;}}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(55,114,255,.55)}70%{box-shadow:0 0 0 10px rgba(55,114,255,0)}100%{box-shadow:0 0 0 0 rgba(55,114,255,0)}}
#start-button.pulsing{animation:pulse .6s ease-out;}

/* ── 모든 다이나믹 아일랜드 버튼 호버를 계정 버튼과 동일하게 통일 ──
   (개별 회전/반짝임/글리치 애니메이션 제거 → 깔끔한 액센트 배경 + 와이드워시 + 아이콘 살짝 들림) */
#start-button:hover, #reset-button:hover, #save-main-button:hover, #upload-button:hover,
#history-button:hover, #settings-button:hover, #patch-button:hover, #info-button:hover,
#bug-main-button:hover, #download-button:hover, #account-button:hover{
  background:var(--accent); color:#fff;
  transform:translateY(-2px) scale(1.05); animation:none;
}
#reset-button:hover, #bug-main-button:hover{ background:var(--danger); }
#start-button:hover i, #reset-button:hover i, #save-main-button:hover i, #upload-button:hover i,
#history-button:hover i, #settings-button:hover i, #patch-button:hover i, #info-button:hover i,
#bug-main-button:hover i, #download-button:hover i, #account-button:hover i{
  animation:none; position:relative; transform:translateY(-1px) scale(1.06);
}
#info-button::after{ display:block; }
.button:disabled,.button:disabled:hover{
  cursor:not-allowed;
  opacity:.58;
  transform:none;
  filter:saturate(.75);
  animation:none;
}
.button:disabled i,.button:disabled:hover i{animation:none;transform:none;}

#seat-container{
  display:grid;
  margin-top:14px;
  
  grid-template-columns:64px 48px 64px 48px 64px 48px 64px 48px 64px;
  grid-auto-rows:64px;
  gap:12px;
  width:min(calc(100vw - 32px),max(360px,var(--tool-panel-width,656px)));
  height:min(604px,max(320px,var(--tool-panel-height,604px)));
  padding:24px 24px 38px;
  justify-content:center;
  align-content:start;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);box-shadow:var(--shadow);position:relative;
  transition:background .4s,border-color .4s;
  overflow:hidden;
}
.seat-tool-title{
  position:absolute;top:18px;bottom:auto;left:24px;
  pointer-events:none;
  z-index:1;
  transition:top .28s var(--es),bottom .28s var(--es),left .28s var(--es),transform .28s var(--es);
}
#seat-container.teacher-view .seat-tool-title{top:auto;bottom:18px;}
#seat-container::after{
  content:'© 2026 Eunsung Lee  ·  All Rights Reserved';
  position:absolute;bottom:10px;right:18px;
  font-size:10px;font-weight:500;color:var(--text-sub);opacity:.4;
  pointer-events:none;letter-spacing:.02em;white-space:nowrap;
}

@keyframes seatSlideIn{from{opacity:0;transform:translateY(-18px) scale(.91)}to{opacity:1;transform:none}}
#seat-container.teacher-animating .seat,
#seat-container.teacher-animating .desk,
#seat-container.teacher-animating .empty{animation:seatSlideIn .3s var(--es) both;}

.seat{width:64px;height:64px;position:relative;}
.seat-inner{
  width:100%;height:100%;border-radius:var(--radius-md);
  display:flex;justify-content:center;align-items:center;
  font-weight:600;font-size:13px;color:var(--text);
  background:var(--surface2);border:2px solid var(--border);
  cursor:grab;user-select:none;position:relative;
  transition:background .45s var(--eo),border-color .45s var(--eo),color .45s var(--eo),transform .22s var(--es),box-shadow .22s;
}
.seat-inner:hover{transform:scale(1.07);box-shadow:0 4px 18px rgba(0,0,0,.13);}
.seat-inner:active{transform:scale(.96);cursor:grabbing;}
body.ptr-dragging,.ptr-dragging *{cursor:grabbing !important;}
body.rs-running #seat-container,
body.rs-running .tool-panel{pointer-events:none;cursor:wait!important;}
body.rs-running #dynamic-island .button:not(#start-button),
body.rs-running #mode-toggle{pointer-events:none;opacity:.58;}

@keyframes namePopIn{0%{opacity:0;transform:scale(.55) translateY(5px);filter:blur(5px)}70%{opacity:1;transform:scale(1.09);filter:blur(0)}100%{transform:scale(1)}}

@keyframes slotDrop{
  0%  {opacity:0;transform:translateY(-14px) scaleY(1.15);filter:blur(6px);}
  55% {opacity:1;transform:translateY(3px)   scaleY(0.94);filter:blur(0);}
  75% {transform:translateY(-1px) scaleY(1.03);}
  100%{opacity:1;transform:translateY(0)     scaleY(1);   filter:blur(0);}
}
.name-char{display:inline-block;transition:opacity .3s,filter .3s,transform .3s;opacity:1;filter:blur(0);}
.name-char.flash-out{opacity:0;filter:blur(10px);transform:scale(1.1);}
.name-char.pop-in{animation:namePopIn .35s var(--es) both;}

.name-char.slot-spin{animation:slotDrop .14s var(--eo) both;}

.name-char.slot-final{animation:slotDrop .28s var(--es) both;}

.seat.male    .seat-inner{background:var(--male-bg);   border-color:var(--male-point);   color:var(--male-point);}
.seat.female  .seat-inner{background:var(--male-bg);   border-color:var(--male-point);   color:var(--male-point);}
.seat.neutral .seat-inner{background:var(--male-bg);   border-color:var(--male-point);   color:var(--male-point);}

/* drag-self: 선택된 원본 카드 */
.seat.drag-self .seat-inner{border:2px dashed var(--drag-color,var(--accent))!important;transform:scale(1.08)!important;box-shadow:0 8px 24px rgba(0,0,0,.16),0 0 0 3px var(--drag-shadow,rgba(55,114,255,.22))!important;opacity:1;}
.seat-disabled.drag-self .seat-disabled-inner{border:2px dashed var(--drag-color,var(--accent))!important;transform:scale(1.08)!important;box-shadow:0 8px 24px rgba(0,0,0,.16),0 0 0 3px var(--drag-shadow,rgba(55,114,255,.22))!important;cursor:grabbing!important;opacity:1;}

/* ghost: 커서를 따라다니는 떠있는 카드 */
#drag-ghost{position:fixed;top:0;left:0;width:64px;height:64px;pointer-events:none;z-index:9999;will-change:transform;}
#drag-ghost .seat-inner,#drag-ghost .seat-disabled-inner{
  transform:scale(1.13) rotate(-3deg)!important;
  border:2px solid var(--drag-color,var(--accent))!important;
  background:color-mix(in srgb,var(--surface2) 72%,var(--drag-color,var(--accent)) 28%)!important;
  color:var(--drag-color,var(--accent))!important;
  box-shadow:0 20px 50px rgba(0,0,0,0.22),0 0 0 3px var(--drag-shadow,rgba(55,114,255,0.25))!important;
  transition:none!important;opacity:1!important;cursor:grabbing!important;
}

/* drag-over: 글로우 (점선 아님) */
.seat.drag-over .seat-inner{background:color-mix(in srgb,var(--surface2) 65%,var(--drag-color,var(--accent)) 35%)!important;border:2px solid var(--drag-color,var(--accent))!important;transform:scale(1.06);box-shadow:0 0 0 3px var(--drag-shadow,rgba(55,114,255,0.22))!important;}

.seat:not(.drag-self) .seat-inner:hover{transform:scale(1.07);box-shadow:0 4px 18px rgba(0,0,0,.13);}

.lock-icon{position:absolute;top:4px;right:4px;width:20px;height:20px;display:flex;align-items:center;justify-content:center;font-size:10px;opacity:0;transition:opacity .2s, color .2s, transform .2s;cursor:pointer;z-index:3;}
.seat:hover .lock-icon{opacity:.55!important;}
.seat-inner:hover .lock-icon{opacity:.55!important;}
.lock-icon:hover{opacity:1!important;transform:scale(1.12);}
.seat.locked .lock-icon{opacity:1!important;top:2px;right:2px;}
.seat.locked .seat-inner{border-style:double;border-width:4px;}

.seat-no{position:absolute;bottom:4px;right:5px;font-size:9px;font-weight:700;opacity:0.85;pointer-events:none;line-height:1;font-variant-numeric:tabular-nums;}

.seat-disabled{width:64px;height:64px;position:relative;}
.seat-disabled-inner{width:100%;height:100%;border-radius:var(--radius-md);background:#D1D5DB;border:2px solid #9CA3AF;display:flex;justify-content:center;align-items:center;cursor:not-allowed;}
.seat-disabled.swap-target .seat-disabled-inner{cursor:grab;transition:background-color .2s, border-color .2s, transform .2s, box-shadow .2s;}
.seat-disabled.swap-target .seat-disabled-inner:hover{box-shadow:0 4px 18px rgba(0,0,0,.13);}
.seat-disabled.swap-target.drag-over .seat-disabled-inner{background:color-mix(in srgb,#D1D5DB 70%,var(--drag-color,var(--accent)) 30%)!important;border:2px solid var(--drag-color,var(--accent))!important;box-shadow:0 0 0 3px var(--drag-shadow,rgba(55,114,255,0.22));}
[data-theme="dark"] .seat-disabled-inner{background:#2D2D2D;border-color:#4B5563;}
@media(prefers-color-scheme:dark){[data-theme="system"] .seat-disabled-inner{background:#2D2D2D;border-color:#4B5563;}}

#seat-container{-webkit-user-select:none;user-select:none;}
img{-webkit-user-drag:none;user-drag:none;outline:1px solid rgba(0,0,0,.1);outline-offset:-1px;}
[data-theme="dark"] img{outline-color:rgba(255,255,255,.1);}
@media(prefers-color-scheme:dark){[data-theme="system"] img{outline-color:rgba(255,255,255,.1);}}
.empty{width:64px;height:64px;}
.aisle{height:64px;width:48px;}
.desk{grid-column:span 2;height:64px;background:var(--desk-bg);color:var(--desk-text);border:2px solid var(--desk-border);border-radius:var(--radius-md);display:flex;justify-content:center;align-items:center;font-weight:700;font-size:14px;transition:background .4s,color .4s;}

.desk-box{width:152px;height:64px;background:var(--desk-bg);color:var(--desk-text);border:2px solid var(--desk-border);border-radius:var(--radius-md);display:flex;justify-content:center;align-items:center;font-weight:700;font-size:14px;transition:background .4s,color .4s;}

@keyframes modalIn{from{opacity:0;transform:translateY(18px) scale(.95)}to{opacity:1;transform:none}}
.modal-overlay{position:fixed;inset:0;background:var(--overlay);backdrop-filter:blur(10px);display:none;justify-content:center;align-items:center;z-index:2000;opacity:0;transition:opacity .25s;}
.modal-overlay.show{display:flex;}
.modal-overlay.visible{opacity:1;}
.modal-box{background:var(--bg);border:1px solid var(--border);padding:24px;border-radius:var(--radius-lg);width:90%;max-width:440px;box-shadow:0 24px 64px rgba(0,0,0,.5);color:var(--text);animation:modalIn .3s var(--es) both;max-height:90vh;overflow-y:auto;}
.modal-box h2{font-size:18px;margin-bottom:18px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--border);padding-bottom:14px;}

.modal-btn{width:100%;padding:13px 14px;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:600;cursor:pointer;margin-top:8px;transition:var(--tr);display:flex;align-items:center;justify-content:center;gap:8px;font-family:'Pretendard',sans-serif;}
.modal-btn:active{transform:scale(.96);}
.modal-btn.primary  {background:var(--accent);color:#fff;}
.modal-btn.primary:hover{filter:brightness(1.1);}
.modal-btn.secondary{background:var(--surface2);color:var(--text);}
.modal-btn.secondary:hover{background:var(--border);}
.modal-btn.danger   {background:var(--danger);color:#fff;}
.modal-btn.danger:hover{filter:brightness(1.1);}

.ice-input{width:100%;padding:12px;border:1.5px solid var(--border);border-radius:10px;background:var(--surface2);color:var(--text);font-size:14px;font-family:'Pretendard',sans-serif;margin-top:10px;outline:none;transition:border-color .2s;}
.ice-input:focus{border-color:var(--accent);}

.student-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;max-height:280px;overflow-y:auto;padding:5px;}
.student-item{padding:10px;background:var(--surface2);border-radius:8px;font-size:12px;text-align:center;cursor:pointer;transition:background-color .2s, border-color .2s, color .2s, transform .2s;border:1px solid transparent;color:var(--text);}
.student-item:hover{background:var(--accent);color:#fff;transform:scale(1.04);}

.stm-head,.stm-row{display:grid;grid-template-columns:38px minmax(0,1fr) 40px 30px;gap:6px;align-items:center;}
.stm-head{padding:0 2px 4px;font-size:11px;color:var(--text-sub);}
.stm-head-no,.stm-head-gender{text-align:center;}
.stm-row{margin-bottom:6px;}
.stm-row .ice-input{height:40px;margin-top:0;padding:6px;}
.stm-no{text-align:center;}
.stm-name{min-width:0;}
.stm-gender{width:40px;height:40px;padding:0;border-radius:8px;border:1.5px solid var(--border);background:transparent;cursor:pointer;font-weight:700;font-size:13px;font-family:'Pretendard',sans-serif;display:flex;align-items:center;justify-content:center;transition:var(--tr);}
.stm-del{width:30px;height:40px;border:none;background:transparent;color:var(--danger);cursor:pointer;font-size:15px;display:flex;align-items:center;justify-content:center;border-radius:8px;transition:background-color .2s,color .2s,transform .2s;}
.stm-del:hover{background:var(--danger);color:#fff;}

.custom-toggle{display:flex;align-items:center;justify-content:space-between;padding:13px 0;border-bottom:1px solid var(--border);cursor:pointer;user-select:none;transition:opacity .2s;}
.custom-toggle:hover{opacity:.8;}
.toggle-switch{width:44px;height:24px;background:var(--border);border-radius:20px;position:relative;transition:background .3s;flex-shrink:0;}
.toggle-switch::after{content:'';position:absolute;top:3px;left:3px;width:18px;height:18px;background:#fff;border-radius:50%;transition:left .3s var(--es);}
.custom-toggle.active .toggle-switch{background:var(--accent);}
.custom-toggle.active .toggle-switch::after{left:23px;}
.toggle-preview-badge{font-size:10px;font-weight:700;padding:2px 7px;border-radius:20px;margin-left:8px;transition:opacity .3s, transform .3s, background-color .3s, color .3s;opacity:0;transform:scale(.8);font-variant-numeric:tabular-nums;}
.toggle-preview-badge.visible{opacity:1;transform:scale(1);}
.badge-on  {background:#DCFCE7;color:#16A34A;}
.badge-off {background:var(--surface2);color:var(--text-sub);}
.badge-near{background:#DCFCE7;color:#16A34A;}
.badge-far {background:#FEE2E2;color:#DC2626;}

.custom-select{position:relative;width:100%;user-select:none;}
.select-trigger{padding:10px 12px;background:var(--surface2);border-radius:8px;font-size:13px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;border:1px solid var(--border);transition:border-color .2s;}
.select-trigger:hover{border-color:var(--accent);}
.select-options{position:absolute;top:calc(100% + 4px);left:0;right:0;background:var(--bg);border:1px solid var(--border);border-radius:10px;display:none;z-index:100;box-shadow:0 8px 24px rgba(0,0,0,.15);overflow:hidden;}
.select-options.show{display:block;animation:modalIn .2s var(--es) both;}
.option-item{padding:12px;font-size:13px;cursor:pointer;color:var(--text);display:flex;align-items:center;gap:8px;transition:background .15s;}
.option-item:hover{background:var(--surface2);}

.section-label{font-size:11px;font-weight:700;color:var(--text-sub);letter-spacing:.05em;text-transform:uppercase;margin-bottom:10px;margin-top:16px;display:flex;align-items:center;gap:6px;}

.constraint-list{display:flex;flex-direction:column;gap:6px;max-height:160px;overflow-y:auto;margin-bottom:10px;}
.constraint-item{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:9px;border:1px solid var(--border);font-size:12px;background:var(--surface2);animation:fadeUp .2s var(--es) both;}
.constraint-type-badge{font-size:10px;font-weight:700;padding:2px 7px;border-radius:20px;flex-shrink:0;}
.constraint-desc{flex:1;color:var(--text);}
.constraint-del{background:none;border:none;color:var(--text-sub);cursor:pointer;font-size:11px;padding:3px 5px;border-radius:5px;transition:background-color .15s, color .15s, transform .15s;flex-shrink:0;font-family:'Pretendard',sans-serif;position:relative;}
.constraint-del::before,.history-delete::before{content:'';position:absolute;inset:50%;width:40px;height:40px;transform:translate(-50%,-50%);}
.card-remove::before,.group-lock::before,.lock-icon::after{content:'';position:absolute;inset:50%;width:28px;height:28px;transform:translate(-50%,-50%);}
.constraint-del:hover{background:var(--danger);color:#fff;}

.con-form{display:flex;flex-direction:column;gap:6px;}
.con-row1{display:grid;grid-template-columns:1fr 1fr;gap:6px;}
.con-row2{display:grid;grid-template-columns:auto 1fr auto;gap:6px;align-items:stretch;}

.mini-dd{position:relative;user-select:none;}
.mini-dd-trigger{height:36px;padding:0 10px;border:1.5px solid var(--border);border-radius:8px;background:var(--surface2);color:var(--text);font-size:12px;font-family:'Pretendard',sans-serif;display:flex;align-items:center;justify-content:space-between;gap:4px;cursor:pointer;transition:border-color .2s;white-space:nowrap;overflow:hidden;}
.mini-dd-trigger:hover{border-color:var(--accent);}
.mini-dd-trigger i{font-size:9px;opacity:.6;flex-shrink:0;}
.mini-dd-opts{position:absolute;top:calc(100% + 4px);left:0;right:0;min-width:120px;background:var(--bg);border:1px solid var(--border);border-radius:10px;z-index:300;box-shadow:0 8px 24px rgba(0,0,0,.18);display:none;max-height:180px;overflow-y:auto;}
.mini-dd-opts.show{display:block;animation:modalIn .18s var(--es) both;}
.mini-dd-opt{padding:9px 12px;font-size:12px;cursor:pointer;color:var(--text);transition:background-color .12s;white-space:nowrap;}
.mini-dd-opt:hover{background:var(--surface2);}
.mini-dd-opt.active{background:var(--accent);color:#fff;}

.type-toggle-btn{height:40px;padding:0 12px;border:1.5px solid var(--border);border-radius:8px;background:var(--surface2);color:var(--text);font-size:12px;font-weight:700;cursor:pointer;white-space:nowrap;transition:background-color .2s, border-color .2s, color .2s, transform .2s;font-family:'Pretendard',sans-serif;display:flex;align-items:center;justify-content:center;gap:5px;}
.type-toggle-btn.near{border-color:#16A34A;color:#16A34A;background:#DCFCE7;}
.type-toggle-btn.far {border-color:#DC2626;color:#DC2626;background:#FEE2E2;}

.radius-wrap{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-sub);}
.radius-input{width:40px;height:36px;padding:0 6px;border:1.5px solid var(--border);border-radius:8px;background:var(--surface2);color:var(--text);font-size:12px;font-family:'Pretendard',sans-serif;outline:none;text-align:center;transition:border-color .2s;}
.radius-input:focus{border-color:var(--accent);}
input[type="number"]{-moz-appearance:textfield;appearance:textfield;}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0;}

.con-add-btn{height:36px;padding:0 14px;background:var(--accent);color:#fff;border:none;border-radius:8px;font-size:13px;font-weight:700;cursor:pointer;white-space:nowrap;transition:var(--tr);font-family:'Pretendard',sans-serif;display:flex;align-items:center;justify-content:center;gap:5px;}
.con-add-btn:hover{filter:brightness(1.1);transform:translateY(-1px);}
.con-add-btn:active{transform:scale(.96);}

.history-list{display:flex;flex-direction:column;gap:8px;max-height:340px;overflow-y:auto;padding:2px;}
.history-item{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-md);cursor:pointer;transition:var(--tr);}
.history-item:hover{border-color:var(--accent);background:var(--surface);transform:translateX(4px);}
.history-item:hover .history-restore{opacity:1;}
.history-num{width:28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;flex-shrink:0;}
.history-info{flex:1;min-width:0;}
.history-date{font-size:12px;font-weight:700;color:var(--text);}
.history-preview{font-size:11px;color:var(--text-sub);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.history-restore{font-size:11px;font-weight:600;color:var(--accent);opacity:0;transition:opacity .2s;white-space:nowrap;flex-shrink:0;}
.history-delete{width:24px;height:24px;border-radius:6px;background:transparent;border:none;cursor:pointer;color:var(--text-sub);font-size:11px;display:flex;align-items:center;justify-content:center;transition:background-color .2s, color .2s, transform .2s;flex-shrink:0;position:relative;}
.history-delete:hover{background:var(--danger);color:#fff;}
.history-empty{text-align:center;padding:30px;color:var(--text-sub);font-size:13px;}

@keyframes toastIn{from{opacity:0;transform:translateX(-50%) translateY(8px) scale(.93)}to{opacity:1;transform:translateX(-50%) translateY(-10px) scale(1)}}
#toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);background:var(--surface2);color:var(--text);padding:10px 22px;border-radius:30px;font-size:13px;font-weight:600;border:1px solid var(--border);opacity:0;pointer-events:none;z-index:3000;white-space:nowrap;}
#toast.show{animation:toastIn .35s var(--es) both;opacity:1;}

@media(max-width:620px){
  #seat-container{grid-template-columns:44px 32px 44px 32px 44px 32px 44px 32px 44px;grid-auto-rows:44px;gap:8px;padding:14px 14px 30px;height:360px;}
  .seat-tool-title{top:14px;bottom:auto;left:18px;}
  #seat-container.teacher-view .seat-tool-title{top:auto;bottom:14px;left:18px;}
  .seat,.empty{width:44px;height:44px;} .aisle{width:32px;height:44px;} .seat-inner{font-size:11px;} .desk{height:44px;font-size:12px;}
}

#legal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:9999;display:flex;align-items:center;justify-content:center;padding:16px;backdrop-filter:blur(4px);}
#legal-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px 24px 20px;max-width:460px;width:100%;box-shadow:0 8px 40px rgba(0,0,0,.25);display:flex;flex-direction:column;gap:14px;max-height:88vh;}
#legal-box h3{font-size:15px;font-weight:700;color:var(--text);display:flex;align-items:center;gap:8px;margin:0;flex-shrink:0;}
#legal-scroll{overflow-y:auto;flex:1;padding-right:4px;}
#legal-scroll::-webkit-scrollbar{width:0;height:0;display:none;background:transparent;}
#legal-scroll::-webkit-scrollbar-thumb{background:transparent;}
#legal-box .legal-item{margin-bottom:14px;}
#legal-box .legal-item:last-child{margin-bottom:0;}
#legal-box .legal-label{font-size:12px;font-weight:700;color:var(--text);margin-bottom:4px;display:flex;align-items:center;gap:6px;}
#legal-box .legal-desc{font-size:12px;line-height:1.65;color:var(--text-sub);margin:0;}
#legal-box .legal-law{display:inline-block;margin-top:4px;font-size:11px;font-weight:600;color:var(--accent);background:rgba(55,114,255,0.10);border-radius:4px;padding:2px 7px;}
#legal-box .legal-notice{font-size:11px;color:var(--text-sub);margin-top:6px;padding-top:12px;border-top:1px solid var(--border);flex-shrink:0;}
#legal-box .legal-btns{display:flex;gap:8px;margin-top:4px;}
#legal-box .legal-btns button{flex:1;padding:11px 0;border:none;border-radius:var(--radius-sm);font-size:13px;font-weight:600;cursor:pointer;font-family:'Pretendard',sans-serif;transition:var(--tr);}
.legal-hide{background:var(--surface2);color:var(--text-sub);}
.legal-hide:hover{background:var(--border);}
.legal-close{background:var(--accent);color:#fff;}
.legal-close:hover{filter:brightness(1.1);}

#cookie-banner{position:fixed;bottom:16px;right:16px;z-index:4000;max-width:300px;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:14px 16px;box-shadow:0 4px 20px rgba(0,0,0,.15);font-size:12px;color:var(--text-sub);line-height:1.6;transition:opacity .3s,transform .3s;opacity:0;transform:translateY(8px);pointer-events:none;}
#cookie-banner.show{opacity:1;transform:translateY(0);pointer-events:auto;}
#cookie-banner strong{color:var(--text);font-weight:600;}
#cookie-banner-btns{display:flex;gap:6px;margin-top:10px;}
#cookie-accept{flex:1;padding:6px 0;background:var(--accent);color:#fff;border:none;border-radius:8px;font-size:12px;font-weight:600;cursor:pointer;}
#cookie-decline{flex:1;padding:6px 0;background:transparent;color:var(--text-sub);border:1px solid var(--border);border-radius:8px;font-size:11px;font-weight:500;cursor:pointer;}
#cookie-decline:hover{background:var(--surface2);}
#ip-badge{position:fixed;bottom:12px;left:16px;z-index:100;font-size:10px;font-weight:500;color:var(--text-sub);opacity:.45;pointer-events:none;letter-spacing:.02em;font-family:'Pretendard',sans-serif;}
.tool-area{display:flex;justify-content:center;margin-top:14px;width:100%;}
.tool-panel{width:min(calc(100vw - 32px),max(360px,var(--tool-panel-width,656px)));height:min(604px,max(320px,var(--tool-panel-height,604px)));background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px 24px 38px;display:flex;flex-direction:column;gap:16px;box-shadow:var(--shadow);position:relative;overflow:visible;}
.tool-panel::after{content:'© 2026 Eunsung Lee  ·  All Rights Reserved';position:absolute;bottom:10px;right:18px;font-size:10px;font-weight:500;color:var(--text-sub);opacity:.4;pointer-events:none;letter-spacing:.02em;white-space:nowrap;}
.tool-title{font-size:16px;font-weight:700;display:flex;align-items:center;gap:8px;color:var(--text);}
.tool-form{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--text);}
.tool-field{height:46px;display:inline-flex;align-items:center;gap:8px;padding:0 12px;border:1.5px solid var(--border);border-radius:10px;background:var(--surface2);color:var(--text-sub);font-size:13px;font-weight:700;}
.tool-field.compact{padding-right:12px;}
.tool-field .ice-input{width:56px;height:34px;margin:0;padding:0 6px;border-radius:9px;text-align:center;font-size:15px;font-weight:800;background:var(--bg);}
.tool-check{height:42px;display:flex;align-items:center;gap:7px;font-size:12px;color:var(--text-sub);cursor:pointer;padding:0 10px;border:1px solid var(--border);border-radius:10px;background:var(--surface2);}
.tool-check input{cursor:pointer;}
.seg2{display:flex;height:46px;}
.seg2-btn{padding:0 18px;font-size:13px;font-weight:800;border:1.5px solid var(--border);background:var(--surface2);color:var(--text-sub);cursor:pointer;font-family:inherit;display:flex;align-items:center;justify-content:center;gap:8px;transition:var(--tr);}
.seg2-btn i{font-size:14px;}
.seg2-btn:first-child{border-radius:10px 0 0 10px;}
.seg2-btn:last-child{border-radius:0 10px 10px 0;border-left:none;}
.seg2-btn.active{background:var(--accent);color:#fff;border-color:var(--accent);}
.pick-result{min-height:140px;display:flex;align-items:center;justify-content:center;overflow:visible;width:100%;padding:8px;}
.pick-big{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;width:100%;max-width:100%;padding:8px;}
.tool-student-card{
  width:64px;height:64px;border-radius:var(--radius-md);
  display:inline-flex;justify-content:center;align-items:center;
  font-weight:600;font-size:13px;color:var(--male-point);
  background:var(--male-bg);border:2px solid var(--male-point);
  position:relative;user-select:none;text-align:center;line-height:1;
  font-variant-numeric:tabular-nums;
  transition:background .45s var(--eo),border-color .45s var(--eo),color .45s var(--eo),transform .22s var(--es),box-shadow .22s;
}
.tool-student-card:hover{transform:scale(1.07);box-shadow:0 4px 18px rgba(0,0,0,.13);}
.tool-student-card.empty-card{background:var(--male-bg);border-style:solid;border-color:var(--male-point);color:var(--male-point);}
.pick-name{padding:0;min-width:64px;}
.pick-history-label{font-size:11px;color:var(--text-sub);margin-bottom:6px;font-variant-numeric:tabular-nums;}
.pick-history{overflow-y:auto;scrollbar-gutter:auto;min-height:0;width:100%;padding:8px 10px 12px;}
.pick-chips{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-start;justify-content:flex-start;width:100%;}
.pick-chip{padding:0;min-width:64px;}
.removable-card{position:relative;}
.student-card-wrap{position:relative;display:inline-flex;flex:0 0 auto;}
.card-remove,.group-lock{width:20px;height:20px;border:none;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:10px;transition:background-color .2s, color .2s, opacity .2s, transform .2s, box-shadow .2s;position:relative;}
.card-remove{position:absolute;top:4px;right:4px;z-index:2;opacity:0;background:transparent;color:var(--male-point);box-shadow:none;font-size:10px;}
.student-card-wrap:hover .card-remove,.student-card-wrap:focus-within .card-remove{opacity:1;}
.card-remove:hover{background:transparent;color:var(--male-point);transform:scale(1.14);box-shadow:none;}
.group-result{display:flex;flex-direction:column;gap:10px;margin-top:4px;overflow-y:auto;padding-right:2px;min-height:0;flex:1 1 auto;}
.group-card{background:var(--surface2);border:1px solid var(--border);border-radius:12px;padding:12px;}
.group-card.drag-over{border-color:var(--accent);background:color-mix(in srgb,var(--surface2) 78%,var(--accent) 22%);box-shadow:0 0 0 3px rgba(55,114,255,.16);}
.group-add-btn{height:44px;border:1px dashed var(--border);border-radius:12px;background:transparent;color:var(--text-sub);font-size:13px;font-weight:800;font-family:inherit;display:flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;transition:background-color .2s,border-color .2s,color .2s,transform .2s;flex:0 0 44px;width:100%;}
.group-add-btn:hover{background:color-mix(in srgb,var(--surface2) 78%,var(--accent) 22%);border-color:var(--accent);color:var(--accent);transform:translateY(-1px);}
.group-chip{cursor:grab;transition:transform .15s, box-shadow .15s, opacity .15s;}
.group-empty{display:none!important;}
.group-preview-empty{cursor:default;pointer-events:none;}
.group-member-wrap{position:relative;display:inline-flex;}
.group-lock{position:absolute;top:4px;right:4px;opacity:0;background:transparent;color:currentColor;box-shadow:none;}
.group-member-wrap:hover .group-lock,.group-lock.locked{opacity:1;}
.group-member-wrap:hover .group-lock{opacity:.55;}
.group-lock.locked{background:transparent;color:currentColor;opacity:1!important;}
.group-chip.locked{border-style:double;border-width:4px;cursor:default;}
.group-chip.locked .group-lock{top:2px;right:2px;}
.group-chip:active{cursor:grabbing;}
.group-chip.drag-self{border:2px dashed var(--accent)!important;transform:scale(1.08)!important;box-shadow:0 8px 24px rgba(0,0,0,.16),0 0 0 3px rgba(55,114,255,.22)!important;opacity:1;}
.group-chip.drag-self .name-char,.group-chip.drag-self .seat-no{opacity:1;}
.group-chip.drag-over{background:color-mix(in srgb,var(--surface2) 65%,var(--accent) 35%)!important;border:2px solid var(--accent)!important;transform:scale(1.06);box-shadow:0 0 0 3px rgba(55,114,255,.22)!important;}
.group-card-title{font-size:14px;font-weight:700;color:var(--accent);margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.group-count{font-size:11px;font-weight:500;color:var(--text-sub);font-variant-numeric:tabular-nums;}
#group-drag-ghost{position:fixed;top:0;left:0;width:64px;height:64px;pointer-events:none;z-index:9999;will-change:transform;}
#group-drag-ghost .tool-student-card{
  transform:scale(1.13) rotate(-3deg)!important;
  box-shadow:0 20px 50px rgba(0,0,0,.22),0 0 0 3px rgba(55,114,255,.25)!important;
  transition:none!important;opacity:1!important;cursor:grabbing!important;
}
@media(max-width:620px){.tool-panel{height:360px;padding:18px;}}
.tool-menu{position:fixed;z-index:9000;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:6px;box-shadow:0 8px 24px rgba(0,0,0,.25);display:flex;flex-direction:column;gap:2px;min-width:168px;}
.tool-menu-item{padding:9px 14px;font-size:13px;font-weight:600;color:var(--text);border-radius:8px;cursor:pointer;display:flex;align-items:center;gap:10px;}
.tool-menu-item:hover{background:var(--surface2);}
.tool-menu-item.active{background:var(--accent);color:#fff;}
.tool-beta{margin-left:auto;padding:2px 7px;border-radius:999px;background:var(--danger);color:#fff;font-size:9px;font-weight:800;letter-spacing:.04em;line-height:1.25;}
#mode-toggle{display:none;justify-content:center;gap:0;margin-top:12px;}
.settings-mode-toggle{display:flex;justify-content:flex-start;gap:0;margin:0 0 12px;height:46px;}
.mode-seg{height:46px;padding:0 18px;font-size:13px;font-weight:800;border:1.5px solid var(--border);background:var(--surface2);color:var(--text-sub);cursor:pointer;font-family:inherit;display:flex;align-items:center;justify-content:center;gap:8px;transition:background-color .15s, border-color .15s, color .15s, transform .15s;}
.mode-seg i{font-size:14px;}
.mode-seg:first-child{border-radius:10px 0 0 10px;}
.mode-seg:last-child{border-radius:0 10px 10px 0;border-left:none;}
.mode-seg.active{background:var(--accent);color:#fff;border-color:var(--accent);}
#block-overlay,#ban-overlay{position:fixed;inset:0;z-index:99999;background:var(--bg);color:var(--text);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;font-family:'Pretendard',sans-serif;padding:24px;box-sizing:border-box;}
.bl-icon{font-size:40px;color:var(--danger);}
.bl-title{font-size:17px;font-weight:700;}
.bl-sub{font-size:13px;color:var(--text-sub);text-align:center;}
.bl-ip{font-size:11px;color:var(--text-sub);opacity:.6;font-family:monospace;margin-top:-4px;}
.bl-logout-btn{margin-top:8px;padding:10px 22px;font-size:14px;font-weight:600;color:var(--danger);background:transparent;border:1px solid var(--danger);border-radius:8px;cursor:pointer;display:inline-flex;align-items:center;gap:8px;font-family:'Pretendard',sans-serif;transition:background .15s,color .15s;}
.bl-logout-btn:hover{background:var(--danger);color:#fff;}


.rainbow-seat {
  background: color-mix(in srgb, var(--surface) 82%, #9bc5f4 18%) !important;
  border: 2px solid #9bc5f4 !important;
  animation: rainbow-border-anim 4s ease-in-out infinite;
}
@keyframes rainbow-border-anim {
  0%,100% { border-color: #9bc5f4; }
  50%      { border-color: #b8daf8; }
}
.seat.drag-self .rainbow-seat { animation: none !important; }

.rainbow-seat .name-char {
  color: var(--text) !important;
  background: none !important;
  -webkit-background-clip: unset !important;
  background-clip: unset !important;
  font-weight: 600 !important;
}