/* 입실론 v60 모바일 우선 UI. 기존 화면 구조와 기능 ID는 유지한다. */
:root{
  --app-accent:#1d4ed8;
  --app-accent-strong:#1e40af;
  --app-accent-soft:#eff6ff;
  --app-bg:#f5f7fb;
  --app-surface:#ffffff;
  --app-text:#0f172a;
  --app-muted:#475569;
  --app-border:#dbe3ee;
  --app-radius:16px;
  --app-shadow:0 8px 24px rgba(30,64,175,.07);
  --app-nav-height:68px;
  --app-z-header:20;
  --app-z-nav:40;
  --app-z-sheet:1200;
  --app-fast:140ms;
  --app-base:200ms;
}

html{background:var(--app-bg);scroll-behavior:smooth;}
body{background:var(--app-bg);color:var(--app-text);font-size:15px;line-height:1.55;overscroll-behavior-y:none;}
button,input,select,textarea{font:inherit;}
button,.cat,.tab,.tb,.uf,.level-item,.omr-bubble{touch-action:manipulation;cursor:pointer;}
button:active,.cat:active,.tab:active,.tb:active,.uf:active,.level-item:active{opacity:.78;}
:focus-visible{outline:3px solid rgba(37,99,235,.38);outline-offset:2px;}
input:focus-visible,select:focus-visible,textarea:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(37,99,235,.22);border-color:var(--app-accent);}

.hdr{position:relative;z-index:var(--app-z-header);box-shadow:0 1px 0 rgba(15,23,42,.07);}
.hdr-top{min-height:56px;gap:12px;padding-top:max(10px,env(safe-area-inset-top));padding-bottom:8px;}
.logo{min-width:0;flex:1;align-items:center;}
.logo-main{font-size:19px;letter-spacing:-.04em;}
.logo-sub{font-size:11px;color:#64748b;}
.logo-badge{flex:0 0 auto;border-radius:8px;padding:4px 8px;background:var(--app-accent-soft);}
.install-trigger{display:none;align-items:center;justify-content:center;gap:6px;min-height:40px;padding:0 12px;border:1px solid var(--app-border);border-radius:10px;background:var(--app-surface);color:var(--app-accent);font-size:12px;font-weight:700;white-space:nowrap;}
.install-trigger i{font-size:18px;}

.inner{max-width:720px;padding:20px 16px 40px;}
.inner.counsel-wide{width:100%;max-width:none;padding-left:clamp(12px,2vw,32px);padding-right:clamp(12px,2vw,32px);}
.card,.stg-card,.col-section,.hi,.vw-card{border-color:var(--app-border);border-radius:var(--app-radius);box-shadow:var(--app-shadow);}
.card-title{font-size:12px;color:var(--app-muted);letter-spacing:0;text-transform:none;margin-bottom:14px;}
.sec-title{font-size:15px;letter-spacing:-.01em;}
.notice{font-size:12px;line-height:1.65;border-radius:12px;}
.src{font-size:10px;line-height:1.55;border-radius:7px;white-space:normal;}
.empty-text{font-size:14px;line-height:1.7;color:#64748b;}
.btn{min-height:48px;padding:12px 16px;border-radius:12px;font-size:15px;}
.btn-p{background:var(--app-accent);box-shadow:0 8px 18px rgba(29,78,216,.18);}
.btn-p:hover{background:var(--app-accent-strong);}
.tb,.uf{min-height:44px;display:inline-flex;align-items:center;justify-content:center;}
.fi,select.fi,.search-inp,.vw-in,.target-select{min-height:46px;font-size:16px;}
.ai-input{min-height:44px;font-size:20px;}
.ai-lbl,.ai-res-lbl{font-size:10px;letter-spacing:0;text-transform:none;}
.omr-bubble{width:44px;height:44px;min-width:44px;}
.tabs{scroll-snap-type:x proximity;padding:0 8px;}
.tab{min-height:48px;padding:10px 14px;scroll-snap-align:start;font-size:13px;}
.cats{padding-bottom:10px;}
.cat{min-height:44px;display:inline-flex;align-items:center;}
.uni-item{padding:14px 12px;border-radius:14px;}
.uni-name{font-size:14px;}
.uni-dept{font-size:12px;line-height:1.45;}
.toast{max-width:calc(100vw - 32px);white-space:normal;text-align:center;font-size:13px;line-height:1.45;border-radius:12px;}

.mobile-bottom-nav,.app-sheet-scrim{display:none;}
.app-sheet-scrim[hidden]{display:none!important;}
body.sheet-open{overflow:hidden;}

@media (max-width:767px), (max-width:900px) and (max-height:500px){
  body{font-size:16px;}
  .hdr-top{padding-left:14px;padding-right:14px;}
  .logo img{height:24px!important;margin-right:6px!important;}
  .logo-sub{display:none;}
  .logo-badge{font-size:10px;}
  .install-trigger{display:inline-flex;width:44px;height:44px;padding:0;}
  .install-trigger span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}
  .cats{display:none!important;}
  .tabs{border-top:1px solid var(--app-border);background:var(--app-surface);}
  .main{padding-bottom:calc(var(--app-nav-height) + env(safe-area-inset-bottom));}
  .inner{width:100%;max-width:none;padding:16px 12px 32px;}
  .inner.counsel-wide{padding-left:12px;padding-right:12px;}
  .card,.stg-card,.col-section{padding:16px 14px;margin-bottom:12px;}
  .subj-grid{grid-template-columns:1fr 1fr;gap:8px;}
  .score-banner{padding:20px 16px;border-radius:16px;}
  .total-num{font-size:44px;}
  .ai-cell{padding:8px 4px;min-width:0;}
  .ai-input::placeholder{font-size:10px;}
  .form-hdr{align-items:flex-start;}
  .fhdr-title{font-size:15px;}
  .fhdr-sub{font-size:11px;text-align:right;max-width:55%;line-height:1.45;}
  .uni-item{align-items:flex-start;gap:8px;}
  .uni-meta{padding-top:2px;}
  .uni-tags{flex-wrap:wrap;}
  .chart-wrap{height:220px;}
  .toast{bottom:calc(var(--app-nav-height) + env(safe-area-inset-bottom) + 12px);}

  .mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:var(--app-z-nav);height:calc(var(--app-nav-height) + env(safe-area-inset-bottom));padding:6px 8px env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);gap:4px;background:rgba(255,255,255,.96);border-top:1px solid var(--app-border);box-shadow:0 -8px 24px rgba(15,23,42,.08);}
  .mobile-nav-item{min-width:0;min-height:56px;border:0;border-radius:12px;background:transparent;color:#64748b;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:11px;font-weight:600;}
  .mobile-nav-item i{font-size:22px;line-height:1;}
  .mobile-nav-item.on{color:var(--app-accent);background:var(--app-accent-soft);font-weight:800;}

  .app-sheet-scrim{position:fixed;inset:0;z-index:var(--app-z-sheet);display:flex;align-items:flex-end;justify-content:center;padding-top:env(safe-area-inset-top);background:rgba(15,23,42,.46);}
  .app-sheet{width:100%;max-width:560px;max-height:min(78dvh,620px);overflow-y:auto;padding:8px 16px calc(20px + env(safe-area-inset-bottom));border-radius:20px 20px 0 0;background:var(--app-surface);box-shadow:0 -16px 40px rgba(15,23,42,.18);animation:sheet-in var(--app-base) cubic-bezier(.22,1,.36,1);}
  .app-sheet-handle{width:40px;height:4px;margin:2px auto 10px;border-radius:99px;background:#cbd5e1;}
  .app-sheet-header{display:flex;align-items:center;justify-content:space-between;min-height:52px;}
  .app-sheet-header h2{font-size:18px;letter-spacing:-.02em;}
  .icon-button{width:44px;height:44px;border:0;border-radius:12px;background:#f1f5f9;color:var(--app-text);font-size:22px;}
  .app-sheet-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;padding:8px 0 4px;}
  .app-sheet-grid button{min-height:88px;border:1px solid var(--app-border);border-radius:14px;background:#f8fafc;color:var(--app-text);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;font-size:13px;font-weight:700;}
  .app-sheet-grid i{font-size:26px;color:var(--app-accent);}
  .install-guide-body{padding:4px 0 8px;color:var(--app-muted);font-size:14px;line-height:1.7;}
  .install-step{display:flex;gap:12px;align-items:flex-start;padding:12px 0;}
  .install-step+.install-step{border-top:1px solid var(--app-border);}
  .install-step i{width:28px;flex:0 0 28px;color:var(--app-accent);font-size:24px;text-align:center;}
  .install-step strong{display:block;color:var(--app-text);margin-bottom:2px;}
}

@media (max-width:390px){
  .logo-main{font-size:17px;}
  .logo-badge{display:none;}
  .tab{padding-left:12px;padding-right:12px;}
  .ai-input{font-size:18px;}
  .mobile-nav-item{font-size:10px;}
}

@media (max-height:500px) and (orientation:landscape){
  :root{--app-nav-height:56px;}
  .hdr-top{min-height:46px;padding-top:6px;padding-bottom:6px;}
  .mobile-nav-item{min-height:44px;flex-direction:row;gap:5px;}
  .mobile-nav-item i{font-size:19px;}
  .app-sheet{max-height:88dvh;}
}

@media (min-width:768px){
  .hdr-top,.cats,.tabs{max-width:760px;margin-left:auto;margin-right:auto;}
}

@media (display-mode:standalone){
  .install-trigger{display:none!important;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;}
}

@keyframes sheet-in{from{transform:translateY(24px);opacity:.7}to{transform:translateY(0);opacity:1}}