:root{
  --bg:#ffffff;
  --panel:#f7f8fa;
  --panel2:#ffffff;
  --text:#111827;
  --muted:#4b5563;
  --line:#e5e7eb;
  --accent:#2563eb;
}

*{box-sizing:border-box}
html,body{height:100%}

body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI,
               Roboto, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  background:var(--bg);
  color:var(--text);
  display:flex;
}

.app{width:100%; min-height:100vh; display:flex;}

/* ================= Sidebar ================= */

.sidebar{
  width:10vw;
  min-width:220px;
  max-width:280px;
  background:#ffffff;
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  /* tighter to top-left */
  padding:10px 10px;
  position:sticky;
  top:0;
  height:100vh;
}

/* ===== Brand (STABLE VERSION) ===== */

.brand{
  margin:0 0 12px 0;
  padding:0;
  border-radius:16px;
  background:transparent;
  border:none;

  /* logo becomes background behind text */
  position:relative;
  overflow:hidden;
}

.brand::before{
  content:"";
  position:absolute;
  left:-6px;
  top:-10px;
  width:210px;
  height:140px;
  background-image:url('/static/img/logo_mark.svg');
  background-repeat:no-repeat;
  background-position:left top;
  background-size:contain;
  opacity:0.95;
  pointer-events:none;
  z-index:0;
}


.logo-row{display:flex;align-items:flex-start;gap:10px;position:relative;z-index:1}
/* hide the inline logo image — we render it as background */
.logo-mark{display:none}

.logo{
  font-weight:800;
  letter-spacing:0.5px;
  font-size:26px;
  padding:10px 0 0 0;
  border:none;
  border-radius:0;
  background:transparent;
}

.logo-slogan{
  margin-top:4px;
  padding:0;
  font-size:13px;
  letter-spacing:0.04em;
  color: rgba(92, 45, 145, 0.95);
  line-height:1.2;
}

.nav{
  margin-top:14px;
  display:flex;
  flex-direction:column;
  gap:8px;
  flex:1;
}

.nav-item{
  color:var(--muted);
  text-decoration:none;
  padding:10px 10px;
  border-radius:12px;
  border:1px solid transparent;
  line-height:1.15;
  font-size:14px;
}

.nav-item:hover{
  border-color:var(--line);
  color:var(--text);
  background:rgba(37,99,235,0.06);
}

.nav-item.active{
  border-color:rgba(78,161,255,0.5);
  color:var(--text);
  background:rgba(78,161,255,0.12);
}

.sidebar-footer{padding-top:10px;}

.disclaimer{
  font-size:12px;
  color:var(--muted);
  padding:10px;
  border:1px dashed var(--line);
  border-radius:12px;
}

/* ================= Main ================= */

.main{
  flex:1;
  display:flex;
  flex-direction:column;
  min-width:0;
}

.header{
  position:sticky;
  top:0;
  z-index:5;
  background:rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border-bottom:1px solid var(--line);
  padding:40px 18px;
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  justify-content:center;
  gap:8px;
  min-height:120px;
}

.header-title{font-size:18px; font-weight:700;}
.header-subtitle{font-size:13px; color:var(--muted); margin-top:4px;}
.header-actions{display:flex; align-items:center; gap:10px;}

.content{
  padding:18px;
  max-width:1400px;
}

/* ================= Cards & Grids ================= */

.card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:16px;
  padding:16px;
  margin-bottom:16px;
}

.grid2{display:grid; grid-template-columns:1fr 1fr; gap:12px}
.grid4{display:grid; grid-template-columns:1fr 1fr; gap:12px}


.grid-2x2{display:grid; grid-template-columns:1fr 1fr; gap:12px}
.grid-3x2{display:grid; grid-template-columns:repeat(3, minmax(0, 1fr)); gap:12px}
@media(max-width:980px){
  .grid-3x2{grid-template-columns:repeat(2, minmax(0, 1fr))}

  .grid4{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr}
  .sidebar{min-width:200px}
}

/* ================= Tiles ================= */

.tile{
  display:block;
  text-decoration:none;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:18px;
  padding:18px;
  transition: transform .08s ease, border-color .12s ease;
}

.tile:hover{
  transform: translateY(-2px);
  border-color:rgba(78,161,255,0.5);
}

.tile-title{font-weight:750; margin-bottom:6px}
.tile-desc{font-size:13px; color:var(--muted)}
.tile-empty{opacity:.75}

/* City background tiles */

.tile.city-bg{
  position:relative;
  overflow:hidden;
  background-size:cover;
  background-position: 92% 52%;
}

.tile.city-bg::before{
  content:"";
  position:absolute;
  inset:0;
  background: rgba(255,255,255,0.62);
  border-radius:18px;
}

.tile.city-bg > *{
  position:relative;
  z-index:1;
}

.tile.bg-ndq{ background-image:url("/static/img/city_ny.jpg"); }
.tile.bg-ftse{ background-image:url("/static/img/city_hk.jpg"); }
.tile.bg-hsi{ background-image:url("/static/img/city_london.jpg"); }
.tile.bg-dax{ background-image:url("/static/img/city_berlin.jpg"); }
.tile.bg-cyb{ background-image:url("/static/img/city_shenzhen.jpg"); }

/* ================= Charts ================= */

.chart{height:420px; width:100%}
.chart.small{height:260px}
canvas.chart{display:block; background:#ffffff}

/* ================= Buttons ================= */

.btn{
  background:rgba(78,161,255,0.18);
  border:1px solid rgba(78,161,255,0.45);
  color:var(--text);
  padding:10px 12px;
  border-radius:12px;
  cursor:pointer;
  font-weight:650;
}

.btn:hover{background:rgba(78,161,255,0.24);}
.btn-ghost{background:transparent; border:1px solid var(--line);}

/* ================= Contacts ================= */

.contact-hero{
  position: relative;
  min-height: 70vh;
  border:1px solid var(--line);
  border-radius: 18px;
  overflow:hidden;
  background:#fff;
}

.contact-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-size: cover;
  background-position: 92% 52%;
  animation: contactBg 18s infinite;
}

@keyframes contactBg{
  0%, 33%   { background-image:url("/static/img/city_ny.jpg"); }
  34%, 66%  { background-image:url("/static/img/city_london.jpg"); }
  67%, 100% { background-image:url("/static/img/city_hk.jpg"); }
}

.contact-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background: rgba(0,0,0,0.42);
}

.contact-body{
  position: relative;
  z-index: 1;
  height: 100%;
  display:flex;
  align-items:center;
  justify-content:center;
  padding: 0 48px;
}

.contact-card{
  max-width: 520px;
  background: rgba(255,255,255,0.92);
  border:1px solid rgba(255,255,255,0.35);
  border-radius: 18px;
  padding: 20px 22px;
  box-shadow: 0 18px 60px rgba(0,0,0,0.25);
  text-align:center;
}
/* ================= Detail pages (strategy backtest) ================= */
.detail-page .sidebar{display:none !important;}
.detail-page .main{width:100%;}

/* Back button + topbar helpers (used on detail pages) */
.topbar{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  padding:18px 18px 14px;
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  position:sticky;
  top:0;
  z-index:6;
}
.topbar-left{display:flex; flex-direction:column; gap:6px; min-width:0;}
.topbar-row{display:flex; align-items:center; gap:10px; flex-wrap:wrap;}
.topbar-title{margin:0; font-size:22px; line-height:1.2; min-width:0;}
.topbar-subtitle{color:var(--muted); font-size:13px; max-width:90ch;}
.back-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:8px 10px;
  border:1px solid var(--line);
  border-radius:12px;
  background:#fff;
  color:var(--text);
  text-decoration:none;
  font-weight:700;
  font-size:14px;
  line-height:1;
}
.back-btn:hover{background:var(--panel);}

.input{width:100%; padding:10px 12px; border:1px solid var(--line); border-radius:12px; background:#fff; font:inherit;}
textarea.input{resize:vertical}
.msg-list{max-height:420px; overflow:auto; display:flex; flex-direction:column; gap:10px;}
.msg-item{border:1px solid var(--line); border-radius:14px; padding:10px 12px; background:rgba(255,255,255,0.9)}
.msg-meta{display:flex; justify-content:space-between; gap:10px; align-items:center;}
.msg-name{font-weight:600}
.msg-time{font-size:12px; color:var(--muted)}
.msg-body{white-space:pre-wrap; margin-top:6px}
.btn-link{background:transparent; border:0; color:var(--brand); cursor:pointer; padding:6px 8px;}

.topbar-right{display:flex; gap:10px; align-items:center;}
.btn-link{border:none; background:transparent; color:var(--brand); cursor:pointer; padding:6px 8px; border-radius:10px}
.btn-link:hover{background:rgba(0,0,0,0.04)}

/* Message Board */
.msg-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.msg-del{border:0;background:transparent;cursor:pointer;font-size:16px;opacity:0.75;}
.msg-del:hover{opacity:1;}
.msg-time{opacity:0.7;font-size:12px;margin-left:8px;}


/* ----- Modal (Backtest Results) ----- */
.modal{
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
}
.modal.open{ display: flex; }
.modal-overlay{
  position:absolute;
  inset:0;
  background: rgba(0,0,0,0.45);
}
.modal-dialog{
  position: relative;
  width: min(900px, calc(100vw - 48px));
  max-height: calc(100vh - 64px);
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 20px 70px rgba(0,0,0,0.35);
  overflow: hidden;
  display:flex;
  flex-direction: column;
}
.modal-header{
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid rgba(0,0,0,0.10);
}
.modal-title{
  font-weight: 650;
}
.modal-body{
  padding: 12px 14px;
  overflow: auto;
}
.icon-btn{
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  padding: 6px 8px;
  border-radius: 10px;
}
.icon-btn:hover{ background: rgba(0,0,0,0.06); }
.pre{
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
  line-height: 1.45;
}

/* Back-compat: support chart-small class name */
.chart.chart-small{height:260px}
canvas.chart-small{display:block; background:#ffffff; height:260px; width:100%}

/* ===== Responsive: mobile sidebar -> dropdown ===== */
.mobile-nav{
  display:none;
  margin-top:10px;
}
.mobile-nav select{
  width:100%;
  border:1px solid var(--line);
  background:var(--panel2);
  border-radius:12px;
  padding:10px 12px;
  font-size:14px;
}

.market-grid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap:12px;
}
@media (max-width: 980px){
  .market-grid{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px){
  .app{ flex-direction:column; }
  .sidebar{
    width:100%;
    max-width:none;
    min-width:0;
    height:auto;
    position:relative;
    top:auto;
    border-right:none;
    border-bottom:1px solid var(--line);
  }
  .nav{ display:none; }
  .mobile-nav{ display:block; }
  .main{ width:100%; }
}

/* ===== Explorer tabs/cards ===== */
.tabs{ display:flex; gap:10px; flex-wrap:wrap; }
.tab{
  border:1px solid var(--line);
  background:var(--panel2);
  color:var(--muted);
  border-radius:999px;
  padding:8px 12px;
  font-size:13px;
  cursor:pointer;
}
.tab.active{
  border-color:rgba(78,161,255,0.6);
  background:rgba(78,161,255,0.10);
  color:var(--text);
}
.continent{ margin-top:16px; }
.continent-title{ margin:16px 0 10px; font-size:18px; }
.mkt-card{
  position:relative;
  border:1px solid var(--line);
  background:var(--panel2);
  border-radius:18px;
  padding:14px 14px 12px;
  box-shadow: var(--shadow);
}
.mkt-badge{
  position:absolute;
  top:12px;
  right:12px;
  font-size:12px;
  color:var(--muted);
  background:rgba(0,0,0,0.04);
  border:1px solid var(--line);
  padding:4px 8px;
  border-radius:999px;
}
.mkt-title{ font-weight:700; padding-right:84px; }
.mkt-meta{ color:var(--muted); font-size:13px; margin-top:6px; min-height:18px; }
.mkt-actions{ display:flex; gap:10px; margin-top:12px; }