/* Phong cách theo hipuku.dev/snippets (references/): nền void tối + lưới 44px, chữ đậm hình học,
   chú thích kiểu viết tay, số liệu mono. Parkinsans không có dấu tiếng Việt -> chỉ dùng cho wordmark
   và chữ số; chữ tiếng Việt dùng Be Vietnam Pro (cùng tinh thần hình học, đủ dấu). */
:root {
  --void-0: #121213; --void-10: #1f1f20; --void-20: #2b2b2c; --void-30: #383839; --void-40: #575759;
  --void-50: #838385; --void-55: #959597; --void-60: #b1b1b3; --void-70: #d3d3d5; --void-80: #e8e8ea;
  --void-90: #f1f1f4; --void-100: #fff;
  --pulsar-dark: #4468d8; --pulsar: #7193ed; --pulsar-light: #c2cffa;
  --quasar-dark: #9b72e6; --quasar: #bf9ff1;
  --corona-dark: #f28bad; --flare: #e15e42; --flare-dark: #c83d25;
  --solstice: #f78d2c; --supernova: #ffc700; --nebula: #15ad70; --nebula-light: #b4edcf;
  --orbit: #73bde7; --tidal: #68d0ca;

  --surface-page: var(--void-0); --surface-raised: var(--void-10); --surface-overlay: var(--void-20);
  --surface-hover: var(--void-30);
  --ink-primary: var(--void-90); --ink-secondary: var(--void-60); --ink-tertiary: var(--void-55);
  --ink-on-colour: var(--void-0);
  --border-default: var(--void-20); --border-strong: var(--void-40);
  --up: var(--nebula); --down: var(--flare);

  --font-display: "Parkinsans", "Be Vietnam Pro", system-ui, sans-serif;
  --font-sans: "Be Vietnam Pro", system-ui, sans-serif;
  --font-mono: "Geist Mono", "Fira Code", ui-monospace, monospace;
  --font-annotation: "Patrick Hand", cursive;

  --radius-sm: 4px; --radius-md: 8px; --radius-lg: 12px; --radius-xl: 16px; --radius-card: 24px;
  --ease-card: cubic-bezier(.22, 1, .36, 1); --duration-card: .28s;
  --nav-height: 4.5rem; --gutter: clamp(16px, 4vw, 48px);
  color-scheme: dark;
}

* , *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
html, body { overflow-x: clip; }
body {
  background: var(--surface-page); color: var(--ink-primary);
  font: 400 1rem/1.6 var(--font-sans); -webkit-font-smoothing: antialiased; min-height: 100vh;
}
body::before {
  --grid-line: color-mix(in srgb, var(--border-default) 50%, transparent);
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px),
                    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--pulsar); outline-offset: 3px; border-radius: 4px; }
.num { font-family: var(--font-display); font-variant-numeric: tabular-nums; }
.mono { font-family: var(--font-mono); }
.muted { color: var(--ink-tertiary); }
.up { color: var(--up); } .down { color: var(--down); }
[hidden] { display: none !important; }

/* ------------------------------------------------------------------ nav */
.nav {
  position: sticky; top: 0; z-index: 20; height: var(--nav-height);
  display: flex; align-items: center; gap: 1.5rem; padding: 0 var(--gutter);
  background: color-mix(in oklab, var(--surface-page) 72%, transparent); backdrop-filter: blur(12px);
}
.wordmark { font: 800 2rem/1 var(--font-display); letter-spacing: -.03em; display: flex; }
.wordmark span:nth-child(1) { color: var(--quasar); } .wordmark span:nth-child(2) { color: var(--corona-dark); }
.wordmark span:nth-child(3) { color: var(--flare); } .wordmark span:nth-child(4) { color: var(--solstice); }
.wordmark span:nth-child(5) { color: var(--pulsar); }
.nav-meta { display: flex; gap: 1rem; font: 500 .75rem var(--font-mono); color: var(--ink-tertiary); white-space: nowrap; }
.nav-meta b { color: var(--ink-secondary); font-weight: 500; }
.nav-links { margin-left: auto; min-width: 0; max-width: 100%; display: flex; gap: clamp(.75rem, 2.5vw, 2.5rem); overflow-x: auto; scrollbar-width: none; }
.nav-links a { font-weight: 600; font-size: 1.0625rem; white-space: nowrap; color: var(--ink-primary); transition: color .15s; }
.nav-links a:hover { color: var(--pulsar); }
.nav-links a[aria-current="page"] { color: var(--pulsar); }
.nav-links sup { font: 500 .65rem var(--font-mono); margin-left: 2px; }

/* ------------------------------------------------------------------ layout */
main { padding: 0 var(--gutter) 6rem; max-width: 1400px; margin: 0 auto; }
.hero { text-align: center; padding: clamp(1.5rem, 5vw, 3.5rem) 0 clamp(1.5rem, 4vw, 3rem); }
.display {
  font: 800 clamp(2.6rem, 5.4vw + 1rem, 5.5rem)/1.02 var(--font-sans); letter-spacing: -.035em;
  color: var(--pulsar); overflow-wrap: anywhere;
}
.display .a { color: var(--pulsar-dark); }
.lede { font-size: clamp(1rem, .5vw + .9rem, 1.25rem); color: var(--ink-secondary); max-width: 60ch; margin: 1rem auto 0; }
.annotation { font: 1rem/1.3 var(--font-annotation); color: var(--ink-tertiary); }
.section-title { font: 700 clamp(1.4rem, 1.5vw + .8rem, 2rem)/1.15 var(--font-sans); letter-spacing: -.01em; margin: 3rem 0 1rem; }
.label { font: 500 .75rem/1.4 var(--font-mono); text-transform: uppercase; letter-spacing: .06em; color: var(--ink-tertiary); }

/* ------------------------------------------------------------------ cards (snippet grid) */
.grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); }
.card {
  position: relative; background: var(--surface-raised); border-radius: var(--radius-card);
  padding: 1.75rem; min-width: 0; overflow: hidden;
  transition: transform var(--duration-card) var(--ease-card), background var(--duration-card) var(--ease-card);
}
a.card:hover, button.card:hover { transform: translateY(-4px); background: var(--surface-overlay); }
.card-title { font: 800 clamp(1.6rem, 1.4vw + 1rem, 2.25rem)/1.1 var(--font-sans); letter-spacing: -.02em; color: var(--ink-secondary); }
.card .big { font: 800 clamp(2rem, 2.5vw + 1rem, 3.2rem)/1 var(--font-display); letter-spacing: -.03em; margin-top: 1.25rem; }
.card .sub { display: flex; gap: .75rem 1.25rem; flex-wrap: wrap; margin-top: .5rem; font: 500 .875rem var(--font-mono); color: var(--ink-tertiary); }
.card svg.spark { width: 100%; height: 90px; margin-top: 1rem; display: block; }
.card .alloc { margin-top: 1rem; }
.card.new { display: grid; place-items: center; text-align: center; min-height: 260px; border: 2px dashed var(--void-30); background: transparent; }
.card.new .plus { font: 800 4rem/1 var(--font-display); color: var(--void-40); }
.card.new:hover .plus { color: var(--pulsar); }
.card-flat { background: var(--surface-raised); border-radius: var(--radius-card); padding: clamp(1rem, 2vw, 1.75rem); min-width: 0; }

/* ------------------------------------------------------------------ KPI */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; }
.kpi { background: var(--surface-raised); border-radius: var(--radius-xl); padding: 1rem 1.25rem; min-width: 0; }
.kpi .v { font: 700 clamp(1.3rem, 1vw + 1rem, 1.9rem)/1.15 var(--font-display); letter-spacing: -.02em; margin-top: .35rem;
          font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }

/* thanh phân bổ */
.alloc-bar { display: flex; height: 12px; border-radius: 999px; overflow: hidden; background: var(--void-20); gap: 2px; }
.alloc-bar span { display: block; min-width: 3px; }
.legend-row { display: flex; flex-wrap: wrap; gap: .4rem 1rem; margin-top: .75rem; font-size: .875rem; color: var(--ink-secondary); }
.dot { display: inline-block; width: .65rem; height: .65rem; border-radius: 50%; margin-right: .4rem; vertical-align: middle; }

/* ------------------------------------------------------------------ chips / buttons */
.chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.chip {
  border-radius: 999px; padding: .4rem .95rem; font-size: .875rem; font-weight: 600;
  background: var(--surface-overlay); color: var(--ink-secondary); transition: background .15s, color .15s;
}
.chip:hover { background: var(--surface-hover); color: var(--ink-primary); }
.chip[aria-pressed="true"] { background: var(--ink-primary); color: var(--ink-on-colour); }
.chip .dot { margin-right: .35rem; }
.btn {
  display: inline-flex; align-items: center; gap: .5rem; border-radius: 999px; padding: .65rem 1.3rem;
  font-weight: 700; background: var(--pulsar); color: var(--ink-on-colour); transition: filter .15s, transform .15s;
}
.btn:hover { filter: brightness(1.1); } .btn:active { transform: scale(.98); }
.btn.ghost { background: var(--surface-overlay); color: var(--ink-primary); }
.btn.danger { background: transparent; color: var(--flare); box-shadow: inset 0 0 0 1.5px var(--flare); }
.btn:disabled { opacity: .5; cursor: progress; }
.icon-btn { width: 2rem; height: 2rem; border-radius: 50%; display: inline-grid; place-items: center; color: var(--ink-tertiary); }
.icon-btn:hover { background: var(--surface-hover); color: var(--flare); }
.pill { display: inline-block; border-radius: 999px; padding: .1rem .55rem; font: 500 .7rem var(--font-mono);
        background: var(--surface-overlay); color: var(--ink-secondary); text-transform: uppercase; letter-spacing: .04em; }

/* ------------------------------------------------------------------ forms */
.form { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 180px), 1fr)); align-items: end; }
.field { display: grid; gap: .35rem; min-width: 0; }
.wide { grid-column: 1 / -1; }
.field > span { font: 500 .75rem var(--font-mono); text-transform: uppercase; letter-spacing: .05em; color: var(--ink-tertiary); }
.field input, .field select, .field textarea {
  width: 100%; background: var(--surface-page); border: 1.5px solid var(--void-30); border-radius: var(--radius-lg);
  padding: .6rem .8rem; font-size: 1rem; transition: border-color .15s;
}
.field input:focus, .field select:focus { border-color: var(--pulsar); outline: none; }
.field small { color: var(--ink-tertiary); font-size: .8rem; }
.check { display: flex; gap: .5rem; align-items: center; font-size: .9rem; color: var(--ink-secondary); }
.check input { width: 1.1rem; height: 1.1rem; accent-color: var(--pulsar); }
.form-actions { display: flex; gap: .75rem; flex-wrap: wrap; grid-column: 1 / -1; }

/* ------------------------------------------------------------------ tables */
.table-wrap { overflow-x: auto; margin: 0 -.25rem; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th { font: 500 .7rem var(--font-mono); text-transform: uppercase; letter-spacing: .05em; color: var(--ink-tertiary);
     text-align: right; padding: .6rem .5rem; border-bottom: 1px solid var(--void-30); white-space: nowrap; }
td { padding: .6rem .5rem; border-bottom: 1px solid var(--void-20); text-align: right; white-space: nowrap;
     font-variant-numeric: tabular-nums; }
th:first-child, td:first-child, td.l, th.l { text-align: left; }
table.fixed { table-layout: fixed; min-width: 560px; }
table.fixed th:first-child { width: 34%; }
tr.group td { font-weight: 700; color: var(--ink-secondary); padding-top: 1.1rem; border-bottom: 0; }
tbody tr:hover td { background: color-mix(in srgb, var(--surface-hover) 40%, transparent); }
.sym { font-weight: 700; }

/* ------------------------------------------------------------------ chart */
.chart-card { padding: 0; overflow: hidden; }
.chart-head { padding: 1.25rem 1.5rem .5rem; display: grid; gap: .75rem; }
.chart-bar { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; align-items: center; }
.info { display: flex; flex-wrap: wrap; gap: .25rem 1.25rem; font-size: .85rem; padding: 0 1.5rem; }
.info .k { font: 500 .7rem var(--font-mono); text-transform: uppercase; color: var(--ink-tertiary); margin-right: .35rem; }
.info .v { font-family: var(--font-display); font-weight: 600; font-variant-numeric: tabular-nums; display: inline-block; min-width: 9ch; }
.legend { display: flex; flex-wrap: wrap; gap: .3rem .4rem; padding: .5rem 1.25rem; }
.lg { display: inline-flex; align-items: center; gap: .4rem; border: 1.5px solid var(--void-30); border-radius: 999px;
      padding: .2rem .7rem; font-size: .8rem; color: var(--ink-primary); }
.lg .sw { width: 14px; height: 3px; border-radius: 2px; }
.lg .val { font: 600 .8rem var(--font-display); min-width: 52px; text-align: right; font-variant-numeric: tabular-nums; }
.lg[aria-pressed="false"] { color: var(--ink-tertiary); } .lg[aria-pressed="false"] .sw { opacity: .25; }
.lg[aria-pressed="false"] .val { visibility: hidden; }
.chart-box { position: relative; width: 100%; }
#chart-main { height: 420px; } #chart-dd { height: 150px; }
.trades-overlay { position: absolute; top: 8px; left: 12px; right: 90px; z-index: 3; pointer-events: none;
  display: flex; flex-wrap: wrap; gap: 2px 12px; font-size: .78rem; color: var(--ink-secondary);
  background: color-mix(in srgb, var(--surface-overlay) 90%, transparent); border-radius: var(--radius-md);
  padding: .3rem .6rem; max-height: 72px; overflow: hidden; }
.trades-overlay:empty { display: none; }
.tag { font-weight: 700; margin-right: 3px; } .tag.B { color: var(--up); } .tag.S { color: var(--down); }
.pane-title { padding: .5rem 1.5rem 0; }
.chart-note { padding: .75rem 1.5rem 1.25rem; }

dialog { margin: auto; border: 0; color: inherit; width: min(92vw, 460px); background: var(--surface-raised);
         border-radius: var(--radius-card); padding: 1.75rem; }
dialog::backdrop { background: rgba(0, 0, 0, .6); backdrop-filter: blur(4px); }
.form.one { grid-template-columns: 1fr; }
.input { background: var(--surface-page); border: 1.5px solid var(--void-30); border-radius: var(--radius-lg); padding: .55rem .8rem; }
.input:focus { border-color: var(--pulsar); outline: none; }
input.target { width: 6rem; padding: .3rem .5rem; text-align: right; border-radius: var(--radius-md); }

.auth-card { max-width: 460px; margin: 0 auto; }

/* ------------------------------------------------------------------ tabs / misc */
.tabs { display: flex; gap: .5rem; flex-wrap: wrap; justify-content: center; margin-bottom: 2rem; }
.drop {
  border: 2px dashed var(--void-40); border-radius: var(--radius-card); padding: 2.5rem 1.5rem; text-align: center;
  transition: border-color .15s, background .15s; cursor: pointer;
}
.drop.over, .drop:hover { border-color: var(--pulsar); background: color-mix(in srgb, var(--pulsar) 6%, transparent); }
.drop .big { font: 800 1.5rem var(--font-sans); }
.notice { border-radius: var(--radius-xl); padding: .9rem 1.1rem; background: color-mix(in srgb, var(--supernova) 10%, var(--surface-raised));
          color: var(--void-80); font-size: .9rem; }
.notice.err { background: color-mix(in srgb, var(--flare) 14%, var(--surface-raised)); }
.notice.ok { background: color-mix(in srgb, var(--nebula) 14%, var(--surface-raised)); }
details summary { cursor: pointer; color: var(--ink-secondary); }
details ul { margin: .5rem 0 0 1.25rem; font-size: .85rem; color: var(--ink-tertiary); }
.stack { display: grid; gap: 1.25rem; }
.row { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }
.spacer { flex: 1; }
.empty { text-align: center; padding: 3rem 1rem; }
.toast { position: fixed; bottom: 1.5rem; left: 50%; transform: translateX(-50%); z-index: 50; max-width: min(92vw, 560px);
         background: var(--void-90); color: var(--void-0); border-radius: 999px; padding: .7rem 1.3rem; font-weight: 600;
         box-shadow: 0 10px 30px rgba(0,0,0,.4); }
.toast.err { background: var(--flare); color: #fff; }
.loading { text-align: center; padding: 4rem 0; }
.spinner { display: inline-block; width: 28px; height: 28px; border: 3px solid var(--void-30); border-top-color: var(--pulsar);
           border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 720px) {
  :root { --nav-height: auto; }
  .nav { flex-wrap: wrap; gap: .25rem 1rem; padding-top: .75rem; padding-bottom: .5rem; }
  .wordmark { font-size: 1.6rem; }
  .nav-links { margin-left: 0; width: 100%; padding-bottom: .25rem; }
  .nav-links a { font-size: 1rem; }
  #chart-main { height: 320px; } #chart-dd { height: 110px; }
  .trades-overlay { right: 64px; }
  .card { padding: 1.25rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }