/* Shared styles for the public pages: landing, auth (login/signup/reset) and
   legal (terms/risk/privacy). The dashboard (index.html) and admin page keep
   their own inline styles; the token names below match theirs. */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --md-surface: #0b0d17;
  --md-surface-raised: #0f1220;
  --md-surface-container: #141627;
  --md-surface-container-high: #1a1d30;
  --md-surface-container-highest: #2e3252;
  --md-divider: #1e2035;
  --md-outline: #252840;
  --md-outline-strong: #33375a;
  --md-row-hover: #171a2c;

  --md-on-surface: #eceef6;
  --md-on-surface-strong: #d0d3e6;
  --md-on-surface-medium: #b6b9d0;
  --md-on-surface-variant: #9296b0;
  --md-on-surface-faint: #7e82a3;

  --md-primary: #2FC4E0;
  --md-primary-hover: #5AD3EA;
  --md-on-primary: #062330;
  --md-primary-container: #0E3F52;
  --md-on-primary-container: #2FC4E0;

  --md-positive-bright: #4ade80;
  --md-negative: #f87171;
  --md-negative-bg: #2a1218;
  --md-negative-border: #7f1d1d;
  --md-accent-a: #818cf8;
  --md-accent-a-soft: #a5b4fc;
  --md-accent-purple-bg: #1a1020;
  --md-accent-purple-border: #3d1f5c;
  --md-accent-purple-bright: #c9a4f7;

  /* Hero diagram series (validated: scripts/validate_palette.js, dark, #141627) */
  --viz-price: #20A4C0;
  --viz-buy: #2FAE5E;
  --viz-sell: #7D86EE;

  --md-radius-sm: 10px;
  --md-radius-md: 14px;
  --md-radius-lg: 20px;
  --md-radius-full: 999px;

  --md-elevation-2: 0 4px 12px rgba(0,0,0,0.4), 0 2px 4px rgba(0,0,0,0.3);
  --md-elevation-3: 0 24px 60px rgba(0,0,0,0.55), 0 6px 16px rgba(0,0,0,0.35);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

html { scroll-behavior: smooth; }
body {
  background: var(--md-surface);
  color: var(--md-on-surface);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--md-accent-a-soft); }
a:hover { color: var(--md-on-surface); }
:focus-visible { outline: 2px solid var(--md-primary); outline-offset: 3px; border-radius: 6px; }

/* ---------- Brand ---------- */
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--md-on-surface); text-decoration: none;
  font-weight: 700; font-size: 17px; letter-spacing: -0.3px; white-space: nowrap;
}
.brand:hover { color: var(--md-on-surface); }
.brand svg { width: 28px; height: 28px; flex: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 12px; font-size: 15px; font-weight: 600;
  text-decoration: none; white-space: nowrap; cursor: pointer; border: 1px solid transparent;
  transition: background-color .15s, border-color .15s, transform .15s, box-shadow .15s;
}
.btn-primary {
  background: var(--md-primary); color: var(--md-on-primary);
  box-shadow: 0 0 0 1px rgba(47,196,224,0.25), 0 8px 24px -8px rgba(47,196,224,0.55);
}
.btn-primary:hover { background: var(--md-primary-hover); color: var(--md-on-primary); transform: translateY(-1px); }
.btn-secondary {
  background: rgba(255,255,255,0.02); border-color: var(--md-outline-strong); color: var(--md-on-surface);
}
.btn-secondary:hover { background: var(--md-row-hover); border-color: var(--md-on-surface-faint); color: var(--md-on-surface); }
.btn-sm { padding: 8px 16px; font-size: 14px; border-radius: 10px; }

/* ---------- Site header / footer ---------- */
header.site {
  position: sticky; top: 0; z-index: 20;
  background: rgba(11,13,23,0.72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
header.site .inner {
  max-width: 1160px; margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
header.site nav { display: flex; align-items: center; gap: 6px; }
header.site nav a.link {
  color: var(--md-on-surface-medium); text-decoration: none; font-size: 14px;
  padding: 8px 12px; border-radius: 8px; white-space: nowrap;
}
header.site nav a.link:hover { color: var(--md-on-surface); background: rgba(255,255,255,0.04); }
@media (max-width: 640px) {
  header.site .inner { padding: 12px 16px; }
  header.site nav a.link.optional { display: none; }
}

footer.site {
  border-top: 1px solid var(--md-divider);
  padding: 40px 24px 56px; color: var(--md-on-surface-faint); font-size: 13px;
}
footer.site .inner { max-width: 1160px; margin: 0 auto; }
footer.site .top {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  padding-bottom: 24px; margin-bottom: 24px; border-bottom: 1px solid var(--md-divider);
}
footer.site .links { display: flex; gap: 22px; flex-wrap: wrap; }
footer.site .links a { color: var(--md-on-surface-variant); text-decoration: none; }
footer.site .links a:hover { color: var(--md-on-surface); }
footer.site .fine { max-width: 760px; line-height: 1.65; }
footer.site .fine + .fine { margin-top: 8px; }

/* ---------- Background glow (decorative) ---------- */
.glow {
  position: absolute; inset: 0; pointer-events: none; overflow: hidden; z-index: 0;
}
.glow::before, .glow::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(90px); opacity: .55;
}
.glow::before {
  width: 620px; height: 620px; left: 50%; top: -340px; transform: translateX(-80%);
  background: radial-gradient(circle, rgba(47,196,224,0.35), transparent 65%);
}
.glow::after {
  width: 560px; height: 560px; left: 50%; top: -260px; transform: translateX(10%);
  background: radial-gradient(circle, rgba(129,140,248,0.28), transparent 65%);
}
.grid-bg {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
          mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}

/* =================================================================
   Landing
   ================================================================= */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

.hero { position: relative; overflow: hidden; padding: 88px 0 72px; }
.hero .container { position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 960px) { .hero-grid { grid-template-columns: 1fr; gap: 44px; } .hero { padding-top: 56px; } }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 500; color: var(--md-on-surface-medium);
  padding: 6px 12px 6px 8px; border-radius: var(--md-radius-full);
  background: rgba(255,255,255,0.03); border: 1px solid var(--md-outline);
  margin-bottom: 22px;
}
.eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--md-positive-bright);
  box-shadow: 0 0 0 4px rgba(74,222,128,0.15);
}
.hero h1 {
  font-size: clamp(36px, 5.2vw, 58px); line-height: 1.06; letter-spacing: -0.035em;
  font-weight: 750; margin-bottom: 20px;
}
.hero h1 .accent {
  background: linear-gradient(90deg, #5AD3EA, #a5b4fc);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .tagline { font-size: 18px; line-height: 1.6; color: var(--md-on-surface-medium); max-width: 560px; margin-bottom: 32px; }
.hero .cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

.trust-row { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 30px; }
.trust-row span {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--md-on-surface-variant);
}
.trust-row svg { width: 16px; height: 16px; color: var(--md-primary); flex: none; }

.risk-line {
  margin-top: 28px; max-width: 560px;
  display: flex; gap: 10px; align-items: flex-start;
  background: var(--md-accent-purple-bg); border: 1px solid var(--md-accent-purple-border);
  border-radius: var(--md-radius-md); padding: 12px 16px; font-size: 13px; line-height: 1.55;
  color: var(--md-accent-purple-bright);
}
.risk-line a { color: var(--md-accent-purple-bright); }

/* Hero diagram card */
.viz-card {
  position: relative;
  background: linear-gradient(180deg, rgba(26,29,48,0.9), rgba(20,22,39,0.92));
  border: 1px solid var(--md-outline-strong); border-radius: var(--md-radius-lg);
  box-shadow: var(--md-elevation-3), inset 0 1px 0 rgba(255,255,255,0.05);
  padding: 18px 18px 14px;
}
.viz-card .bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.viz-card .title { font-size: 14px; font-weight: 600; color: var(--md-on-surface); }
.viz-card .sub { font-size: 12px; color: var(--md-on-surface-variant); }
.viz-card .tag {
  font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--md-on-surface-variant); border: 1px solid var(--md-outline-strong);
  padding: 3px 8px; border-radius: var(--md-radius-full); white-space: nowrap;
}
.viz-legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 12px; color: var(--md-on-surface-medium); margin-bottom: 4px; }
.viz-legend span { display: inline-flex; align-items: center; gap: 6px; }
.viz-legend i { display: inline-block; }
.viz-legend .k-line { width: 16px; height: 2px; border-radius: 2px; background: var(--viz-price); }
.viz-legend .k-buy, .viz-legend .k-sell { width: 0; height: 0; border-left: 5px solid transparent; border-right: 5px solid transparent; }
.viz-legend .k-buy { border-bottom: 9px solid var(--viz-buy); }
.viz-legend .k-sell { border-top: 9px solid var(--viz-sell); }
.viz-svg { display: block; width: 100%; height: auto; overflow: visible; }
.viz-svg .grid line { stroke: rgba(255,255,255,0.06); stroke-width: 1; }
.viz-svg .axis text, .viz-svg .lbl { fill: var(--md-on-surface-variant); font-size: 11px; font-family: var(--font-sans); }
.viz-svg .lbl-strong { fill: var(--md-on-surface-strong); font-size: 11px; font-weight: 600; font-family: var(--font-sans); }
.viz-svg .price { fill: none; stroke: var(--viz-price); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.viz-svg .buy { fill: var(--viz-buy); stroke: #141627; stroke-width: 2; }
.viz-svg .sell { fill: var(--viz-sell); stroke: #141627; stroke-width: 2; }
.viz-svg .hit { fill: transparent; cursor: default; }
.viz-tip {
  position: absolute; pointer-events: none; z-index: 2; opacity: 0; transition: opacity .12s;
  background: #0b0d17; border: 1px solid var(--md-outline-strong); border-radius: 10px;
  padding: 8px 10px; font-size: 12px; line-height: 1.45; color: var(--md-on-surface-strong);
  box-shadow: var(--md-elevation-2); white-space: nowrap;
}
.viz-tip b { color: var(--md-on-surface); }
.viz-caption { font-size: 12px; color: var(--md-on-surface-variant); margin-top: 8px; line-height: 1.5; }

/* Sections */
.section { padding: 96px 0; position: relative; }
.section + .section { border-top: 1px solid var(--md-divider); }
.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head .kicker {
  font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--md-primary); margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(28px, 3.4vw, 38px); line-height: 1.15; letter-spacing: -0.025em; margin-bottom: 14px; }
.section-head p { font-size: 17px; color: var(--md-on-surface-variant); }
@media (max-width: 640px) { .section { padding: 72px 0; } }

.what-lead {
  font-size: 17px; line-height: 1.7; color: var(--md-on-surface-strong);
  max-width: 820px; margin-bottom: 40px;
}

.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 1000px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }
.feature {
  background: var(--md-surface-raised); border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-lg); padding: 24px 22px;
  transition: border-color .15s, transform .15s;
}
.feature:hover { border-color: var(--md-outline-strong); transform: translateY(-2px); }
.feature .icon {
  width: 40px; height: 40px; border-radius: 12px; margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center;
  background: var(--md-primary-container); color: var(--md-primary);
  box-shadow: inset 0 0 0 1px rgba(47,196,224,0.2);
}
.feature .icon svg { width: 20px; height: 20px; }
.feature h3 { font-size: 16px; letter-spacing: -0.01em; margin-bottom: 8px; }
.feature p { font-size: 14px; line-height: 1.6; color: var(--md-on-surface-variant); }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: step; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }
.step {
  position: relative; background: var(--md-surface-raised); border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-lg); padding: 26px 24px;
}
.step .num {
  font-family: var(--font-mono); font-size: 13px; font-weight: 600; color: var(--md-primary);
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 10px; margin-bottom: 18px;
  background: var(--md-primary-container); box-shadow: inset 0 0 0 1px rgba(47,196,224,0.25);
}
.step h3 { font-size: 17px; letter-spacing: -0.01em; margin-bottom: 8px; }
.step p { font-size: 14.5px; line-height: 1.6; color: var(--md-on-surface-variant); }

.pricing-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
@media (max-width: 860px) { .pricing-wrap { grid-template-columns: 1fr; } }
.pricing-card {
  position: relative; overflow: hidden;
  background: linear-gradient(180deg, var(--md-surface-container-high), var(--md-surface-raised));
  border: 1px solid var(--md-outline-strong); border-radius: var(--md-radius-lg);
  padding: 32px 30px; box-shadow: var(--md-elevation-2);
}
.pricing-card::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px;
  background: linear-gradient(90deg, var(--md-primary), var(--md-accent-a));
}
.pricing-card .plan { font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--md-on-surface-variant); margin-bottom: 14px; }
.pricing-card .rate { font-size: 34px; font-weight: 750; letter-spacing: -0.03em; line-height: 1.1; }
.pricing-card .rate small { display: block; font-size: 15px; font-weight: 500; letter-spacing: 0; color: var(--md-on-surface-variant); margin-top: 6px; }
.pricing-card .desc { margin: 18px 0 20px; color: var(--md-on-surface-variant); font-size: 14.5px; line-height: 1.65; }
.pricing-card ul { list-style: none; border-top: 1px solid var(--md-divider); padding-top: 16px; margin-bottom: 26px; }
.pricing-card li { display: flex; gap: 10px; font-size: 14.5px; color: var(--md-on-surface-strong); padding: 7px 0; }
.pricing-card li svg { width: 18px; height: 18px; color: var(--md-positive-bright); flex: none; margin-top: 2px; }
.pricing-card .btn { width: 100%; }

.cta-band { padding: 24px 0 104px; }
.cta-card {
  position: relative; overflow: hidden; text-align: center;
  border: 1px solid var(--md-outline-strong); border-radius: 28px; padding: 64px 28px;
  background:
    radial-gradient(600px 240px at 50% 0%, rgba(47,196,224,0.18), transparent 70%),
    radial-gradient(500px 220px at 50% 100%, rgba(129,140,248,0.14), transparent 70%),
    var(--md-surface-raised);
}
.cta-card h2 { font-size: clamp(26px, 3.2vw, 36px); letter-spacing: -0.025em; line-height: 1.2; margin-bottom: 12px; }
.cta-card p { color: var(--md-on-surface-medium); font-size: 16px; margin-bottom: 28px; }
.cta-card .cta-row { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* =================================================================
   Auth pages (login / signup / reset)
   ================================================================= */
body.auth {
  min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 40px 16px; position: relative; overflow-x: hidden;
}
body.auth > .glow, body.auth > .grid-bg { position: fixed; }
body.auth .auth-top { position: relative; z-index: 1; margin-bottom: 28px; }
body.auth .card {
  position: relative; z-index: 1; width: 100%; max-width: 400px;
  background: linear-gradient(180deg, rgba(26,29,48,0.92), rgba(20,22,39,0.94));
  border: 1px solid var(--md-outline-strong); border-radius: var(--md-radius-lg);
  padding: 34px 32px 28px; box-shadow: var(--md-elevation-3), inset 0 1px 0 rgba(255,255,255,0.05);
}
body.auth .card h1 { font-size: 22px; letter-spacing: -0.02em; margin-bottom: 6px; }
body.auth .subtitle { font-size: 14.5px; color: var(--md-on-surface-variant); margin-bottom: 26px; }
body.auth label { display: block; font-size: 13px; font-weight: 500; color: var(--md-on-surface-medium); margin: 16px 0 7px; }
body.auth form > label:first-of-type { margin-top: 0; }
body.auth input[type=email], body.auth input[type=password], body.auth input[type=text] {
  width: 100%; background: var(--md-surface); border: 1px solid var(--md-outline-strong);
  border-radius: 11px; padding: 12px 14px; font-size: 15px; color: var(--md-on-surface); font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
}
body.auth input[type=email]:focus, body.auth input[type=password]:focus, body.auth input[type=text]:focus {
  outline: none; border-color: var(--md-primary); box-shadow: 0 0 0 4px rgba(47,196,224,0.15);
}
body.auth .hint { font-size: 12.5px; color: var(--md-on-surface-faint); margin-top: 7px; }
body.auth .remember { display: flex; align-items: center; gap: 9px; margin-top: 16px; }
body.auth .remember label, body.auth .terms { margin: 0; font-size: 13.5px; color: var(--md-on-surface-medium); font-weight: 400; }
body.auth .terms { display: flex; gap: 10px; align-items: flex-start; line-height: 1.5; }
body.auth .terms input { margin-top: 3px; }
body.auth input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--md-primary); flex: none; }
body.auth .risk-banner {
  margin-top: 18px; background: var(--md-negative-bg); border: 1px solid var(--md-negative-border);
  border-radius: 12px; padding: 12px 14px; font-size: 12.5px; line-height: 1.55; color: #fca5a5;
}
body.auth .error { color: var(--md-negative); font-size: 13px; min-height: 18px; margin-top: 14px; }
body.auth .msg { font-size: 13px; min-height: 18px; margin-top: 14px; color: var(--md-on-surface-variant); }
body.auth .msg.error { color: var(--md-negative); }
body.auth .msg.ok { color: var(--md-positive-bright); }
body.auth button[type=submit] {
  width: 100%; margin-top: 10px; padding: 13px; border: none; border-radius: 12px; cursor: pointer;
  background: var(--md-primary); color: var(--md-on-primary); font-size: 15px; font-weight: 600; font-family: inherit;
  box-shadow: 0 8px 24px -10px rgba(47,196,224,0.6); transition: background-color .15s;
}
body.auth button[type=submit]:hover { background: var(--md-primary-hover); }
body.auth button[type=submit]:disabled { opacity: .55; cursor: not-allowed; }
body.auth .links {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--md-divider); font-size: 13.5px;
}
body.auth .links:has(> a:only-child) { justify-content: center; }
body.auth .links a { color: var(--md-on-surface-variant); text-decoration: none; }
body.auth .links a:hover { color: var(--md-on-surface); }
body.auth .auth-foot { position: relative; z-index: 1; margin-top: 26px; font-size: 12.5px; color: var(--md-on-surface-faint); display: flex; gap: 18px; }
body.auth .auth-foot a { color: var(--md-on-surface-faint); text-decoration: none; }
body.auth .auth-foot a:hover { color: var(--md-on-surface-medium); }

/* =================================================================
   Legal pages (terms / risk / privacy)
   ================================================================= */
main.legal { max-width: 760px; margin: 0 auto; padding: 56px 24px 88px; }
main.legal .back {
  display: inline-flex; align-items: center; gap: 6px; font-size: 13.5px;
  color: var(--md-on-surface-variant); text-decoration: none; margin-bottom: 28px;
}
main.legal .back:hover { color: var(--md-on-surface); }
main.legal h1 { font-size: clamp(28px, 4vw, 36px); line-height: 1.2; letter-spacing: -0.025em; margin-bottom: 10px; }
main.legal .version {
  display: inline-block; font-size: 12.5px; color: var(--md-on-surface-variant);
  border: 1px solid var(--md-outline); border-radius: var(--md-radius-full); padding: 4px 12px; margin-bottom: 36px;
}
main.legal h2 { font-size: 19px; letter-spacing: -0.01em; margin: 40px 0 12px; padding-top: 4px; }
main.legal p, main.legal li { font-size: 15.5px; line-height: 1.75; color: var(--md-on-surface-strong); }
main.legal p + p { margin-top: 14px; }
main.legal ul { margin: 12px 0 12px 22px; }
main.legal li + li { margin-top: 10px; }
main.legal strong { color: var(--md-on-surface); }
main.legal .banner {
  background: var(--md-negative-bg); border: 1px solid var(--md-negative-border); border-radius: var(--md-radius-md);
  padding: 16px 18px; color: #fca5a5; font-size: 15px; line-height: 1.6; margin-bottom: 28px;
}

/* Small screens: the diagram scales down with its viewBox, so its text needs
   to be larger in SVG units to stay readable (~11px on screen). */
@media (max-width: 600px) {
  .viz-svg .axis text, .viz-svg .lbl, .viz-svg .lbl-strong { font-size: 17px; }
  .hero { padding-bottom: 48px; }
}