/* =========================================================================
   THEME TOKENS  —  cool palette only (navy, deep blue, cyan, teal, slate,
   ice blue, soft mint). No purple anywhere.
   ========================================================================= */
:root{
  --c-cyan:#22d3ee;  --c-teal:#2dd4bf;  --c-blue:#3b82f6;
  --c-mint:#6ee7b7;  --c-sky:#38bdf8;   --c-slate:#64748b;
  --c-up:#2dd4bf;    --c-down:#5b8bbf;  /* cool up/down for candles */
  --radius:18px;
  --transition:.25s cubic-bezier(.4,0,.2,1);
  --font:"Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
}

/* ---------- Dark theme (default) : professional, finance-focused -------- */
html[data-theme="dark"]{
  --bg-0:#070d1a;  --bg-1:#0b1428;  --bg-grad:radial-gradient(1200px 600px at 80% -10%,#0f2748 0,transparent 60%),radial-gradient(900px 500px at -10% 110%,#062a33 0,transparent 55%);
  --card:rgba(17,29,53,.62);
  --card-solid:#111d35;
  --border:rgba(120,170,225,.14);
  --text:#e8f1ff;  --text-dim:#9fb3d1;  --text-faint:#6c84a6;
  --accent:var(--c-cyan);  --accent-2:var(--c-teal);
  --shadow:0 18px 45px -20px rgba(0,0,0,.75);
  --pos:#34d399;   --neg:#5b8bbf;   --grid:rgba(120,170,225,.10);
  --input:rgba(8,16,32,.7);
}

/* ---------- Light theme : clean & airy ---------------------------------- */
html[data-theme="light"]{
  --bg-0:#eef4fb;  --bg-1:#f6fafe;  --bg-grad:radial-gradient(1100px 600px at 85% -10%,#dceefb 0,transparent 60%),radial-gradient(900px 500px at -10% 110%,#d9f7f0 0,transparent 55%);
  --card:rgba(255,255,255,.72);
  --card-solid:#ffffff;
  --border:rgba(40,90,140,.14);
  --text:#0c2440;  --text-dim:#3f5b7f;  --text-faint:#73879f;
  --accent:#0e9bb8;  --accent-2:#0d9488;
  --shadow:0 16px 38px -22px rgba(20,60,110,.40);
  --pos:#0d9488;   --neg:#4f7eb0;   --grid:rgba(40,90,140,.10);
  --input:rgba(255,255,255,.85);
}

*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--bg-0);
  background-image:var(--bg-grad);
  background-attachment:fixed;
  min-height:100vh;
  line-height:1.45;
  transition:background var(--transition),color var(--transition);
  -webkit-font-smoothing:antialiased;
}

/* ===== Layout shell ===== */
.wrap{max-width:1320px;margin:0 auto;padding:22px clamp(14px,3vw,34px) 60px}

/* ===== Glass card ===== */
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  padding:20px;
  transition:transform var(--transition),box-shadow var(--transition),border var(--transition);
}
.card:hover{transform:translateY(-3px);box-shadow:0 24px 55px -22px rgba(0,0,0,.6)}
.card h2,.card h3{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--text-dim);font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}

/* ===== Header ===== */
header.topbar{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-bottom:22px;
}
.brand{display:flex;align-items:center;gap:12px;margin-right:auto}
.logo{
  width:44px;height:44px;border-radius:13px;flex:none;
  background:linear-gradient(135deg,var(--c-cyan),var(--c-teal));
  display:grid;place-items:center;color:#04222b;font-weight:900;font-size:1.2rem;
  box-shadow:0 8px 22px -6px var(--c-cyan);
}
.brand h1{font-size:1.25rem;letter-spacing:.3px}
.brand small{display:block;color:var(--text-faint);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase}

.controls{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.field{display:flex;flex-direction:column;gap:3px}
.field label{font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text-faint);padding-left:4px}
select,input,button{font-family:inherit;color:var(--text)}
select,input{
  background:var(--input);border:1px solid var(--border);border-radius:11px;
  padding:9px 12px;font-size:.9rem;min-width:120px;outline:none;transition:border var(--transition),box-shadow var(--transition);
}
select:focus,input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 25%,transparent)}

.btn{
  cursor:pointer;border:1px solid var(--border);border-radius:11px;
  background:var(--input);padding:9px 14px;font-size:.85rem;font-weight:600;
  display:inline-flex;align-items:center;gap:7px;transition:all var(--transition);
}
.btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--c-cyan),var(--c-teal));color:#03222b;border:none}
.btn.primary:hover{filter:brightness(1.08);color:#03222b}
.btn.icon{padding:9px 11px}
#refreshBtn.spin svg{animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.updated{font-size:.72rem;color:var(--text-faint);display:flex;align-items:center;gap:6px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--pos);box-shadow:0 0 8px var(--pos)}

/* ===== Grid ===== */
.grid{display:grid;gap:18px}
.top-grid{grid-template-columns:1.15fr 1fr 1fr;margin-bottom:18px}
.chart-grid{grid-template-columns:1fr 1fr;margin-bottom:18px}
.bottom-grid{grid-template-columns:1.4fr 1fr;margin-bottom:18px}
@media(max-width:1040px){.top-grid,.chart-grid,.bottom-grid{grid-template-columns:1fr}}

/* ===== Current value card ===== */
.pair-row{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.pair-row .pair{font-size:1rem;color:var(--text-dim);font-weight:600}
.rate{font-size:clamp(2.2rem,5vw,3rem);font-weight:800;letter-spacing:-1px;line-height:1.1;
  background:linear-gradient(120deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{margin-top:6px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:var(--text-dim);font-size:.9rem}
.change{font-weight:700}
.change.up{color:var(--pos)} .change.down{color:var(--neg)}

.badge{display:inline-flex;align-items:center;gap:6px;font-size:.72rem;font-weight:700;
  padding:5px 11px;border-radius:999px;letter-spacing:.04em;border:1px solid transparent}
.badge.up{background:color-mix(in srgb,var(--pos) 16%,transparent);color:var(--pos);border-color:color-mix(in srgb,var(--pos) 35%,transparent)}
.badge.down{background:color-mix(in srgb,var(--neg) 16%,transparent);color:var(--neg);border-color:color-mix(in srgb,var(--neg) 35%,transparent)}
.badge.flat{background:color-mix(in srgb,var(--c-slate) 20%,transparent);color:var(--text-dim);border-color:color-mix(in srgb,var(--c-slate) 35%,transparent)}

.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
.mini{background:var(--input);border:1px solid var(--border);border-radius:12px;padding:10px}
.mini .k{font-size:.62rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-faint)}
.mini .v{font-size:1rem;font-weight:700;margin-top:3px}

/* ===== AI / pattern lists ===== */
.insight{display:flex;gap:11px;padding:11px 0;border-bottom:1px dashed var(--border)}
.insight:last-child{border-bottom:none}
.insight .ic{flex:none;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;font-size:.95rem;
  background:color-mix(in srgb,var(--accent) 16%,transparent);color:var(--accent)}
.insight p{font-size:.86rem;color:var(--text);line-height:1.4}
.insight p span{color:var(--text-faint);display:block;font-size:.74rem;margin-top:2px}

.pattern{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px dashed var(--border)}
.pattern:last-child{border-bottom:none}
.tag{font-size:.66rem;font-weight:800;letter-spacing:.05em;padding:4px 9px;border-radius:8px;flex:none;text-transform:uppercase}
.tag.t-up{background:color-mix(in srgb,var(--c-teal) 20%,transparent);color:var(--c-teal)}
.tag.t-down{background:color-mix(in srgb,var(--c-down) 22%,transparent);color:var(--neg)}
.tag.t-flat{background:color-mix(in srgb,var(--c-slate) 22%,transparent);color:var(--text-dim)}
.tag.t-vol{background:color-mix(in srgb,var(--c-sky) 22%,transparent);color:var(--c-sky)}
.tag.t-break{background:color-mix(in srgb,var(--c-cyan) 22%,transparent);color:var(--c-cyan)}
.pattern small{color:var(--text-dim);font-size:.8rem}

/* ===== Charts ===== */
.chart-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.chart-box{position:relative;height:320px}
.range-btns{display:flex;gap:6px;background:var(--input);padding:4px;border-radius:11px;border:1px solid var(--border)}
.range-btns button{border:none;background:transparent;color:var(--text-dim);font-size:.78rem;font-weight:600;
  padding:5px 11px;border-radius:8px;cursor:pointer;transition:all var(--transition)}
.range-btns button.active{background:linear-gradient(135deg,var(--c-cyan),var(--c-teal));color:#04222b}
.est-note{font-size:.7rem;color:var(--text-faint);font-style:italic;margin-top:8px}

/* ===== Heatmap ===== */
.heat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px}
.heat-cell{border-radius:13px;padding:14px 12px;color:#eafcff;position:relative;overflow:hidden;
  border:1px solid rgba(255,255,255,.08);transition:transform var(--transition)}
.heat-cell:hover{transform:scale(1.04)}
.heat-cell .code{font-weight:800;font-size:1.05rem;letter-spacing:.04em}
.heat-cell .pct{font-size:.78rem;opacity:.92;font-weight:600;margin-top:3px}
.heat-cell .lbl{font-size:.62rem;opacity:.8;text-transform:uppercase;letter-spacing:.08em;margin-top:6px}
.heat-legend{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:.72rem;color:var(--text-faint)}
.heat-bar{flex:1;height:9px;border-radius:6px;background:linear-gradient(90deg,#0b2233,#0e4a5a,#138a8a,#1fb6a6,#7ff0c8)}

/* ===== Calculator ===== */
.calc-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:end}
@media(max-width:540px){.calc-grid{grid-template-columns:1fr}}
.calc-swap{align-self:end;margin-bottom:2px}
.calc-result{margin-top:16px;background:var(--input);border:1px solid var(--border);border-radius:14px;padding:16px;text-align:center}
.calc-result .big{font-size:clamp(1.5rem,4vw,2rem);font-weight:800;
  background:linear-gradient(120deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.calc-result .rate-line{font-size:.78rem;color:var(--text-faint);margin-top:5px}

/* ===== Table ===== */
.table-tools{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
.table-tools input{flex:1;min-width:160px}
.table-scroll{max-height:430px;overflow:auto;border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:.86rem}
thead th{position:sticky;top:0;background:var(--card-solid);text-align:left;padding:11px 12px;
  font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--text-faint);cursor:pointer;user-select:none;white-space:nowrap;border-bottom:1px solid var(--border)}
thead th:hover{color:var(--accent)}
thead th .arr{opacity:.5;font-size:.7rem}
tbody td{padding:10px 12px;border-bottom:1px solid var(--border)}
tbody tr{transition:background var(--transition)}
tbody tr:hover{background:color-mix(in srgb,var(--accent) 8%,transparent)}
tbody td.code{font-weight:700}
tbody td.name{color:var(--text-dim)}
.num{text-align:right;font-variant-numeric:tabular-nums}
.row-strong{box-shadow:inset 3px 0 0 var(--c-teal)}
.row-weak{box-shadow:inset 3px 0 0 var(--c-down)}
.pill{font-size:.68rem;font-weight:700;padding:3px 8px;border-radius:7px}
.pill.up{background:color-mix(in srgb,var(--pos) 16%,transparent);color:var(--pos)}
.pill.down{background:color-mix(in srgb,var(--neg) 18%,transparent);color:var(--neg)}
.pill.flat{background:color-mix(in srgb,var(--c-slate) 20%,transparent);color:var(--text-dim)}
.lead{font-size:.64rem;font-weight:800;letter-spacing:.06em;margin-left:6px;padding:2px 6px;border-radius:6px;text-transform:uppercase}
.lead.s{background:color-mix(in srgb,var(--c-teal) 22%,transparent);color:var(--c-teal)}
.lead.w{background:color-mix(in srgb,var(--c-down) 24%,transparent);color:var(--neg)}

/* ===== Loading / skeleton / error ===== */
.skeleton{background:linear-gradient(90deg,var(--input) 25%,color-mix(in srgb,var(--accent) 10%,var(--input)) 50%,var(--input) 75%);
  background-size:200% 100%;animation:shimmer 1.3s infinite;border-radius:8px;color:transparent!important}
@keyframes shimmer{to{background-position:-200% 0}}
#overlay{position:fixed;inset:0;background:color-mix(in srgb,var(--bg-0) 70%,transparent);backdrop-filter:blur(3px);
  display:none;place-items:center;z-index:50}
#overlay.show{display:grid}
.loader{display:flex;flex-direction:column;align-items:center;gap:14px;color:var(--text-dim);font-size:.85rem}
.ring{width:46px;height:46px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--accent);animation:spin .8s linear infinite}
#toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(120%);
  background:var(--card-solid);border:1px solid var(--neg);color:var(--text);padding:13px 18px;border-radius:13px;
  box-shadow:var(--shadow);z-index:60;transition:transform .35s ease;max-width:90vw;font-size:.86rem;display:flex;gap:10px;align-items:center}
#toast.show{transform:translateX(-50%) translateY(0)}
#toast .x{cursor:pointer;color:var(--text-faint)}

footer{text-align:center;color:var(--text-faint);font-size:.74rem;margin-top:30px;line-height:1.6}
footer a{color:var(--accent);text-decoration:none}