/* ====== 즐거운 운전법 (Fun Driving) — 다크 테마 ====== */
:root{
  --bg:#0a0f1c; --bg2:#0e1526; --panel:#121b30; --panel2:#16203a;
  --border:#243150; --border2:#2e3d63;
  --txt:#e7eefb; --muted:#8da0c0; --muted2:#5f7196;
  --green:#2dd4a7; --green-d:#16a37f; --red:#ff5d6c; --blue:#4d8dff;
  --amber:#f5b14c; --purple:#a78bfa;
  --radius:14px; --radius-sm:9px;
  --shadow:0 8px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"Pretendard","Pretendard Variable",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  background:radial-gradient(1200px 600px at 80% -10%,rgba(77,141,255,.10),transparent 60%),
             radial-gradient(900px 500px at 0% 0%,rgba(45,212,167,.08),transparent 55%),
             var(--bg);
  color:var(--txt); line-height:1.55; min-height:100vh;
}
a{color:inherit;text-decoration:none}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.mono{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace}

/* ===== Nav ===== */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(10px);
  background:rgba(10,15,28,.72);border-bottom:1px solid var(--border)}
.nav .container{max-width:1680px}
.nav-inner{display:flex;align-items:center;gap:8px;height:62px}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.12rem;letter-spacing:-.02em;white-space:nowrap;flex:0 0 auto}
.brand .dot{width:11px;height:11px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(135deg,var(--green),var(--blue));box-shadow:0 0 12px var(--green)}
.brand .beta{font-size:.62rem;font-weight:700;color:var(--bg);background:var(--amber);
  padding:2px 6px;border-radius:6px;margin-left:2px}
.brand .brand-en{font-size:.74rem;font-weight:600;color:var(--muted);letter-spacing:0}
.nav-links{display:flex;gap:2px;margin-left:14px;flex-wrap:nowrap}
.nav-links a{padding:8px 10px;border-radius:9px;color:var(--muted);font-weight:600;font-size:.9rem;white-space:nowrap}
.nav-links a:hover{color:var(--txt);background:var(--panel)}
.nav-links a.active{color:var(--txt);background:var(--panel2)}
.nav-right{margin-left:auto;display:flex;gap:8px;align-items:center}
.nav-toggle{display:inline-flex;align-items:center;margin-left:6px;font-size:1.1rem;padding:6px 11px}
.nav-drop{display:none;position:absolute;top:62px;right:8px;min-width:220px;background:var(--bg2);
  flex-direction:column;padding:8px;border:1px solid var(--border);border-radius:0 0 14px 14px;
  box-shadow:0 16px 40px rgba(0,0,0,.55);z-index:60}
.nav-drop.open{display:flex}
.nav-drop a{padding:11px 12px;border-radius:9px;color:var(--muted);font-weight:600;font-size:.95rem;white-space:nowrap}
.nav-drop a:hover{color:var(--txt);background:var(--panel)}
.nav-drop a.active{color:var(--txt);background:var(--panel2)}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;
  font-weight:700;font-size:.93rem;padding:10px 16px;border-radius:10px;border:1px solid var(--border2);
  background:var(--panel);color:var(--txt);transition:.15s;white-space:nowrap}
.btn:hover{border-color:var(--blue);transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--green),var(--green-d));border:none;color:#04130d}
.btn-primary:hover{filter:brightness(1.08)}
.btn-blue{background:linear-gradient(135deg,var(--blue),#3b6fe0);border:none;color:#fff}
.btn-amber{background:linear-gradient(135deg,var(--amber),#e0942f);border:none;color:#1a1205}
.btn-ghost{background:transparent}
.btn-lg{padding:14px 24px;font-size:1.02rem}
.btn-block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ===== Cards / panels ===== */
.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.card{background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--border);
  border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.tag{display:inline-block;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:999px;
  background:var(--panel2);border:1px solid var(--border2);color:var(--muted)}
.tag.green{color:var(--green);border-color:rgba(45,212,167,.4)}
.tag.amber{color:var(--amber);border-color:rgba(245,177,76,.4)}
.tag.purple{color:var(--purple);border-color:rgba(167,139,250,.4)}

/* ===== Hero ===== */
.hero{padding:70px 0 40px;text-align:center}
.hero h1{font-size:clamp(2rem,5vw,3.3rem);font-weight:900;letter-spacing:-.03em;margin:14px 0 8px;
  background:linear-gradient(120deg,#fff 30%,var(--green));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:clamp(1rem,2.2vw,1.25rem);color:var(--muted);max-width:680px;margin:0 auto 26px}
.hero .cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.hero-note{margin-top:14px;font-size:.85rem;color:var(--muted2)}

/* ===== Feature grid ===== */
.grid{display:grid;gap:16px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.feature h3{margin:6px 0 6px;font-size:1.08rem}
.feature p{color:var(--muted);font-size:.92rem;margin:0}
.feature .ico{font-size:1.7rem}
.section{padding:46px 0}
.section h2{font-size:1.7rem;font-weight:800;letter-spacing:-.02em;margin:0 0 6px}
.section .lead{color:var(--muted);margin:0 0 24px}
.center{text-align:center}

/* ===== Forms ===== */
label.fld{display:block;font-size:.82rem;font-weight:700;color:var(--muted);margin:0 0 6px}
input,select{width:100%;background:var(--bg2);border:1px solid var(--border2);color:var(--txt);
  border-radius:9px;padding:10px 12px;font-size:.95rem;font-family:inherit}
input:focus,select:focus{outline:none;border-color:var(--blue)}
.row{display:grid;gap:12px;margin-bottom:14px}
.row.c2{grid-template-columns:1fr 1fr}
.row.c3{grid-template-columns:1fr 1fr 1fr}

/* chips (ticker) */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{padding:8px 13px;border-radius:999px;border:1px solid var(--border2);background:var(--bg2);
  cursor:pointer;font-weight:700;font-size:.88rem;color:var(--muted);transition:.15s;position:relative}
.chip:hover{color:var(--txt);border-color:var(--blue)}
.chip.active{background:linear-gradient(135deg,var(--blue),#3b6fe0);color:#fff;border:none}
.chip.locked{opacity:.62}
.chip .lk{margin-left:4px}

/* segmented toggle (자동/수동) */
.seg{display:flex;gap:6px;background:var(--bg2);border:1px solid var(--border2);border-radius:10px;padding:4px;margin-bottom:14px}
.seg-btn{flex:1;padding:9px;border:none;background:transparent;color:var(--muted);font-weight:700;border-radius:7px;cursor:pointer;font-family:inherit;font-size:.92rem}
.seg-btn.active{background:var(--blue);color:#fff}

/* order tables */
.otab{width:100%;border-collapse:collapse;font-size:.86rem}
.otab th{background:var(--bg2);color:var(--muted);font-weight:700;padding:8px;text-align:center;border-bottom:1px solid var(--border2)}
.otab td{padding:8px;text-align:center;border-bottom:1px solid var(--border);font-variant-numeric:tabular-nums}
.otab tr.fill td{background:rgba(245,177,76,.20);font-weight:800}
.otab .moc{color:var(--amber);font-weight:800}
#holdTable input{padding:6px;font-size:.82rem}
#holdTable th{font-size:.74rem;color:var(--muted);font-weight:700;padding:4px;text-align:center}
#holdTable td{padding:2px}

/* date field + calendar button */
.date-field{display:flex;align-items:center;gap:6px}
.date-field input{flex:1;cursor:pointer}
.cal-btn{flex:0 0 auto;width:42px;height:40px;border:none;background:var(--blue);
  color:#fff;border-radius:9px;cursor:pointer;font-size:1.05rem;line-height:1}
.cal-btn:hover{filter:brightness(1.1)}

/* calendar popup */
.cal-info{text-align:center;font-size:.86rem;font-weight:700;color:var(--green);margin-bottom:10px}
.cal-pop{position:fixed;z-index:1000;width:300px;background:var(--panel);border:1px solid var(--border2);
  border-radius:14px;box-shadow:0 18px 50px rgba(0,0,0,.55);padding:14px}
.cal-head{display:flex;align-items:center;gap:6px;margin-bottom:10px}
.cal-head .cal-title{flex:1;text-align:center;font-weight:800;font-size:1.02rem}
.cal-head button{width:40px;height:40px;border:1px solid var(--border2);background:var(--panel2);color:var(--txt);
  border-radius:9px;cursor:pointer;font-size:1rem;font-weight:800;line-height:1}
.cal-head button:hover{border-color:var(--blue)}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:4px}
.cal-dow span{text-align:center;font-size:.78rem;font-weight:800;color:var(--muted);padding:4px 0}
.cal-dow span.sat{color:#7fb0ff}.cal-dow span.sun{color:#ff7a86}
.cal-days button{height:38px;border:none;background:var(--bg2);color:var(--txt);border-radius:8px;cursor:pointer;
  font-weight:700;font-size:.9rem}
.cal-days button:hover{background:var(--panel2);outline:1px solid var(--blue)}
.cal-days button.sat{color:#7fb0ff}.cal-days button.sun{color:#ff7a86}
.cal-days button.inrange{background:rgba(77,141,255,.22)}
.cal-days button.selstart,.cal-days button.selend{background:linear-gradient(135deg,var(--blue),#3b6fe0);color:#fff}
.cal-days button.today{outline:1px solid var(--green)}
.cal-days .blank{height:38px}
.cal-today{width:100%;margin-top:12px;padding:11px;border:none;border-radius:10px;cursor:pointer;
  background:var(--blue);color:#fff;font-weight:800;font-size:.95rem}
.cal-today:hover{filter:brightness(1.1)}

/* toggle switches */
.toggle-box{border:1px solid var(--border);border-radius:12px;padding:14px;margin-bottom:14px;background:var(--bg2)}
.toggle-row{display:flex;align-items:center;justify-content:space-between}
.t-label{font-weight:700;font-size:.92rem;color:var(--txt)}
.switch{position:relative;display:inline-block;width:46px;height:26px;flex:0 0 auto}
.switch input{opacity:0;width:0;height:0}
.switch .slider{position:absolute;cursor:pointer;inset:0;background:var(--border2);border-radius:999px;transition:.2s}
.switch .slider:before{content:"";position:absolute;height:20px;width:20px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s}
.switch input:checked + .slider{background:linear-gradient(135deg,var(--green),var(--green-d))}
.switch input:checked + .slider:before{transform:translateX(20px)}
.switch input:disabled + .slider{opacity:.55;cursor:not-allowed}

/* premium lock box */
.lockbox{position:relative;border:1px dashed var(--border2);border-radius:12px;padding:18px;background:rgba(167,139,250,.05)}
.lockbox.locked .lock-overlay{display:flex}
.lock-overlay{display:none;position:absolute;inset:0;border-radius:12px;
  background:rgba(10,15,28,.45);align-items:center;justify-content:center;
  flex-direction:column;gap:10px;text-align:center;padding:18px;z-index:2}
.lock-overlay .pad{font-size:1.8rem}

/* ===== Backtest layout ===== */
.bt-page{max-width:1760px;margin:0 auto;padding:0 24px}
.bt-wrap{display:grid;grid-template-columns:400px 1fr;gap:22px;align-items:start;padding:24px 0 60px}
.bt-form{position:sticky;top:78px;max-height:calc(100vh - 94px);overflow-y:auto;overflow-x:hidden}
.accordion{border:1px solid var(--border);border-radius:12px;margin-top:14px;overflow:hidden}
.accordion>summary{cursor:pointer;padding:13px 16px;font-weight:700;background:var(--panel2);list-style:none;
  display:flex;align-items:center;justify-content:space-between}
.accordion>summary::-webkit-details-marker{display:none}
.accordion .acc-body{padding:16px}

/* metrics */
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.metric{background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:14px 16px}
.metric .k{font-size:.76rem;color:var(--muted);font-weight:700}
.metric .v{font-size:1.5rem;font-weight:900;letter-spacing:-.02em;margin-top:4px}
.v.pos{color:var(--green)} .v.neg{color:var(--red)}

/* heatmap */
.heat{width:100%;border-collapse:separate;border-spacing:3px;font-size:.78rem}
.heat th{color:var(--muted);font-weight:700;padding:4px;text-align:center}
.heat td{text-align:center;padding:8px 4px;border-radius:6px;font-weight:700;font-variant-numeric:tabular-nums;
  background:var(--bg2);color:var(--muted2);min-width:42px}
.heat td.y{background:transparent;color:var(--txt);font-weight:800}

/* states */
.empty,.loading{padding:60px 20px;text-align:center;color:var(--muted)}
.spinner{width:34px;height:34px;border:3px solid var(--border2);border-top-color:var(--green);
  border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 14px}
@keyframes spin{to{transform:rotate(360deg)}}
.banner{padding:11px 14px;border-radius:10px;font-size:.9rem;font-weight:600;margin-bottom:12px}
.banner.warn{background:rgba(245,177,76,.12);border:1px solid rgba(245,177,76,.35);color:var(--amber)}
.banner.err{background:rgba(255,93,108,.12);border:1px solid rgba(255,93,108,.35);color:var(--red)}
.banner.ok{background:rgba(45,212,167,.12);border:1px solid rgba(45,212,167,.35);color:var(--green)}
.banner.info{background:rgba(77,141,255,.12);border:1px solid rgba(77,141,255,.35);color:var(--blue)}

.report-frame{width:100%;height:1400px;border:1px solid var(--border);border-radius:12px;background:#fff}

/* google login */
.gbtn{background:#fff;color:#1f2937;border:1px solid #dadce0;font-weight:700;gap:10px}
.gbtn:hover{background:#f5f6f8;border-color:#dadce0;transform:none}
.orline{display:flex;align-items:center;gap:10px;color:var(--muted2);font-size:.82rem;margin:14px 0}
.orline:before,.orline:after{content:"";flex:1;height:1px;background:var(--border)}

/* ===== Auth ===== */
.auth-card{max-width:420px;margin:60px auto;}
.auth-card h2{margin:0 0 4px} .auth-card p.sub{color:var(--muted);margin:0 0 22px}
.step{display:none}.step.on{display:block}
.muted{color:var(--muted)} .small{font-size:.85rem}
.hr{height:1px;background:var(--border);margin:18px 0}

/* pricing/sponsor */
.price-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;max-width:760px;margin:0 auto}
.price{padding:26px;border-radius:16px;border:1px solid var(--border)}
.price.pro{border:1px solid var(--green);box-shadow:0 0 0 1px rgba(45,212,167,.3),var(--shadow)}
.price h3{margin:0 0 4px;font-size:1.2rem} .price .amt{font-size:1.6rem;font-weight:900;margin:8px 0}
.price ul{list-style:none;padding:0;margin:14px 0;display:flex;flex-direction:column;gap:9px}
.price li{display:flex;gap:9px;align-items:flex-start;color:var(--muted);font-size:.92rem}
.price li .ck{color:var(--green);font-weight:900}
.price li.lock .ck{color:var(--amber)}

/* footer */
.footer{border-top:1px solid var(--border);padding:30px 0;color:var(--muted2);font-size:.85rem;text-align:center;margin-top:40px}

/* faq */
.faq-item{border:1px solid var(--border);border-radius:12px;margin-bottom:10px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:15px 18px;font-weight:700;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item .a{padding:0 18px 16px;color:var(--muted)}

/* 네비가 한 줄에 안 들어가면 햄버거 드롭다운으로 전환 */
/* 좁아질수록 상단 인라인 메뉴를 오른쪽부터 하나씩 숨김 (백테스트·주문표는 끝까지 유지 / 나머지는 ☰ 드롭다운에 항상 존재) */
@media(max-width:1280px){ .brand .brand-en{display:none} .nav-links a:nth-child(8){display:none} }
@media(max-width:1180px){ .nav-links a:nth-child(7){display:none} }
@media(max-width:1080px){ .nav-links a:nth-child(6){display:none} }
@media(max-width:1000px){ .nav-links a:nth-child(5){display:none} }
@media(max-width:940px){ .nav-links a:nth-child(4){display:none} }
@media(max-width:860px){ .nav-links a:nth-child(3){display:none} }
@media(max-width:560px){ .nav-right .btn{max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap} }
@media(max-width:900px){
  .grid-3,.grid-4{grid-template-columns:1fr 1fr}
  .bt-wrap{grid-template-columns:1fr}.bt-form{position:static;max-height:none;overflow:visible}
  .price-grid,.row.c2,.row.c3{grid-template-columns:1fr}
}
@media(max-width:560px){.grid-3,.grid-4,.grid-2{grid-template-columns:1fr}.metrics{grid-template-columns:1fr 1fr}}