/* ============================================================
   STORM — design system
   Stochastic Trading and Optimization under Regulation for MEM
   ============================================================ */

:root {
  /* Surfaces */
  --bg-0: #050810;
  --bg-1: #0A0E1A;
  --bg-2: #0F1524;
  --bg-3: #141B2D;
  --bg-4: #1A2238;

  /* Lines */
  --border: #1E2A44;
  --border-soft: #162038;
  --border-strong: #2A3656;

  /* Text */
  --text-1: #E6EDF7;
  --text-2: #A0AABF;
  --text-3: #6A7488;
  --text-4: #4A5468;

  /* Brand */
  --cyan: #5BD4FF;
  --cyan-dim: #3FA8D4;
  --azure: #4F8BFF;
  --violet: #B58CFF;
  --teal: #4FE4C1;
  --amber: #FFB454;
  --rose: #FF6E8A;
  --emerald: #4ADE80;

  /* Argentine flag palette */
  --arg-celeste: #75AADB;
  --arg-celeste-light: #8DC4F0;
  --arg-celeste-dark: #5B8FC4;
  --arg-white: #FFFFFF;
  --arg-gold: #F6B40E;
  --arg-gold-light: #FFD54F;

  /* Gradients */
  --grad-storm: linear-gradient(135deg, var(--arg-celeste) 0%, var(--cyan) 40%, var(--azure) 100%);
  --grad-storm-soft: linear-gradient(135deg, rgba(117,170,219,0.15) 0%, rgba(91,212,255,0.10) 55%, rgba(79,139,255,0.12) 100%);
  --grad-arg: linear-gradient(180deg, var(--arg-celeste) 0%, var(--arg-white) 50%, var(--arg-celeste) 100%);

  /* Typography */
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Spacing scale (8pt base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;

  /* Shadows */
  --glow-cyan: 0 0 32px rgba(91, 212, 255, 0.18);
  --glow-violet: 0 0 32px rgba(181, 140, 255, 0.16);
  --shadow-card: 0 1px 0 rgba(255,255,255,0.04) inset, 0 24px 60px -20px rgba(0,0,0,0.5);

  /* Layout */
  --container: 1240px;
  --gutter: clamp(16px, 4vw, 48px);
}

/* ----------------------------------------------------------------- reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  font-family: var(--sans);
  background: var(--bg-1);
  color: var(--text-1);
  line-height: 1.55;
  font-feature-settings: "ss01", "cv11", "tnum";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  touch-action: pan-y;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* ----------------------------------------------------------------- layout */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
section { position: relative; }

/* skip-link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  padding: 8px 14px;
  background: var(--cyan);
  color: var(--bg-1);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  z-index: 9999;
  transition: top 0.2s;
  text-decoration: none;
}
.skip-link:focus { top: 0; outline: 2px solid var(--text-1); }

/* scroll progress bar */
.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--border-soft);
  z-index: 101;
  pointer-events: none;
}
.scroll-progress > i {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--azure));
  transition: width 0.1s linear;
}

/* ----------------------------------------------------------------- typography */
h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-4);
  color: var(--text-1);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  /* parent .section-head is a 1-col grid; without this the pill stretches to fill the cell */
  justify-self: start;
  width: fit-content;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(91, 212, 255, 0.04);
  margin-bottom: var(--space-4);
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}
.h-display {
  font-size: clamp(40px, 7vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  margin: 0;
}
.h-display .gradient {
  background: var(--grad-storm);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.h-section {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.1;
}
.h-3 { font-size: 20px; line-height: 1.3; }
.lede {
  font-size: clamp(16px, 1.4vw, 18px);
  color: var(--text-2);
  max-width: 680px;
  line-height: 1.65;
}
p { color: var(--text-2); }
code, .mono { font-family: var(--mono); }

/* ----------------------------------------------------------------- nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  background: rgba(10, 14, 26, 0.72);
  border-bottom: 1px solid var(--border-soft);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
  position: relative;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.18em;
}
.nav-brand img { width: 28px; height: 28px; }
.nav-links {
  display: flex; gap: 28px;
  font-size: 14px;
}
.nav-links a {
  color: var(--text-2);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-1); }
.nav-links a.is-active { color: var(--text-1); border-bottom: 2px solid var(--cyan); padding-bottom: 2px; }
.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  font-size: 13px;
  color: var(--text-1);
  transition: all 0.2s;
}
.nav-cta:hover { border-color: var(--cyan); background: rgba(91,212,255,0.05); }
.nav-right { display: inline-flex; align-items: center; gap: 14px; }
.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  overflow: hidden;
  background: rgba(10, 14, 26, 0.4);
}
.lang-toggle button {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--text-3);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  padding: 7px 10px;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.lang-toggle button + button { border-left: 1px solid var(--border-soft); }
.lang-toggle button:hover { color: var(--text-1); }
.lang-toggle button.is-active {
  color: var(--cyan);
  background: rgba(91, 212, 255, 0.08);
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-cta span { display: none; }
}

/* Argentine flag divider between sections */
.arg-divider {
  width: 100%;
  height: 3px;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  pointer-events: none;
  background: linear-gradient(90deg,
    rgba(117, 170, 219, 0.90) 0%,  rgba(117, 170, 219, 0.90) 33%,
    rgba(230, 237, 247, 0.70) 33%, rgba(230, 237, 247, 0.70) 66%,
    rgba(117, 170, 219, 0.90) 66%, rgba(117, 170, 219, 0.90) 100%
  );
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px;
  border-radius: var(--r-md);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad-storm);
  color: #0A0E1A;
  box-shadow: var(--glow-cyan);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 0 40px rgba(91,212,255,0.32); }
.btn-secondary {
  background: var(--bg-3);
  border-color: var(--border-strong);
  color: var(--text-1);
}
.btn-secondary:hover { border-color: var(--cyan); background: var(--bg-4); }
.btn-ghost { color: var(--text-2); }
.btn-ghost:hover { color: var(--text-1); }
.btn .arrow { transition: transform 0.2s; }
.btn:hover .arrow { transform: translateX(3px); }

/* ----------------------------------------------------------------- hero */
.hero {
  position: relative;
  min-height: 100vh;
  padding-top: 120px;
  padding-bottom: var(--space-9);
  overflow: hidden;
  isolation: isolate;
}
.hero-canvas {
  position: absolute;
  inset: 0;
  /* width/height pin to parent — without this, setting canvas.width in JS leaks out via
     the presentation attribute and the canvas grows unboundedly on every resize() call */
  width: 100%;
  height: 100%;
  display: block;
  z-index: -1;
  pointer-events: none;
}
.hero-canvas.reduced-motion {
  background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(79, 139, 255, 0.10) 0%, transparent 70%);
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 42, 68, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 68, 0.4) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 0%, transparent 70%);
  z-index: -2;
}
.hero-glow {
  position: absolute;
  width: 60vw; height: 60vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 139, 255, 0.18) 0%, transparent 60%);
  top: -10vw; left: 50%; transform: translateX(-50%);
  z-index: -2;
  filter: blur(20px);
}
.hero-content {
  display: grid;
  gap: var(--space-5);
  max-width: 920px;
}
.hero h1 { margin-bottom: var(--space-3); }
.hero .meta-row {
  display: flex; flex-wrap: wrap; gap: 12px;
  margin-top: var(--space-2);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}
.hero .meta-row span {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: rgba(15, 21, 36, 0.6);
}
.hero-cta {
  display: flex; flex-wrap: wrap; gap: 12px;
  margin-top: var(--space-5);
}
.hero-kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(15,21,36,0.6) 0%, rgba(10,14,26,0.4) 100%);
  backdrop-filter: blur(6px);
}
.hero-kpis .kpi { display: grid; gap: 4px; }
.hero-kpis .kpi-label {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-3);
}
.hero-kpis .kpi-value {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.01em;
}
.hero-kpis .kpi-value .unit {
  font-size: 12px;
  color: var(--text-3);
  margin-left: 4px;
  letter-spacing: 0;
  font-weight: 400;
}

/* ----------------------------------------------------------------- section base */
.section {
  padding: var(--space-9) 0;
  position: relative;
  /* keep #anchor jumps clear of the fixed nav */
  scroll-margin-top: 72px;
}
.section-head {
  display: grid; gap: var(--space-3);
  margin-bottom: var(--space-7);
  max-width: 760px;
}
.section-grid {
  display: grid;
  gap: var(--space-5);
}

/* divider */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--border) 30%, var(--border) 70%, transparent 100%);
  margin: 0;
}

/* ----------------------------------------------------------------- cards */
.card {
  background: linear-gradient(180deg, var(--bg-2) 0%, rgba(15, 21, 36, 0.6) 100%);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-5);
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s;
}
.card:hover { border-color: var(--border-strong); }
.card-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: var(--space-3);
}
.card h3 { margin-bottom: var(--space-2); }
.card p { font-size: 14px; line-height: 1.6; }

/* ----------------------------------------------------------------- scenario fan section */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
@media (max-width: 920px) { .scenario-grid { grid-template-columns: 1fr; } }
.scenario-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-4);
  overflow: hidden;
}
.scenario-card-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: var(--space-3);
}
.scenario-card-title {
  font-family: var(--display);
  font-weight: 600;
  font-size: 15px;
  color: var(--text-1);
}
.scenario-card-unit {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: 0.08em;
}
.scenario-svg { width: 100%; height: 180px; }
.scenario-legend {
  display: flex; gap: 14px; flex-wrap: wrap;
  margin-top: var(--space-3);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.scenario-legend .swatch {
  display: inline-block;
  width: 12px; height: 2px;
  margin-right: 6px;
  vertical-align: middle;
  border-radius: 2px;
}
.scenario-legend .swatch.band {
  height: 8px; opacity: 0.3;
}

/* ----------------------------------------------------------------- workflow */
.workflow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  position: relative;
}
@media (max-width: 980px) { .workflow { grid-template-columns: 1fr; } }
.workflow-stage {
  background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg-1) 100%);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-5);
  position: relative;
}
.workflow-stage::before {
  content: attr(data-step);
  position: absolute;
  top: var(--space-4); right: var(--space-4);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: 0.1em;
}
.workflow-stage-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 8px;
}
.workflow-stage h3 {
  font-size: 18px;
  margin-bottom: var(--space-4);
}
.workflow-vars {
  display: grid; gap: 6px;
  margin-top: var(--space-3);
}
.workflow-var {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-2);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 5px 0;
  border-top: 1px dashed var(--border-soft);
}
.workflow-var:first-child { border-top: 0; }
.workflow-var .sym { color: var(--cyan); font-weight: 500; }
.workflow-var .desc { color: var(--text-3); font-size: 11px; }

/* connecting flow line (desktop) */
.workflow-flow {
  position: absolute;
  top: 50%; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--cyan) 10%, var(--violet) 50%, var(--azure) 90%, transparent 100%);
  opacity: 0.4;
  z-index: -1;
}
@media (max-width: 980px) { .workflow-flow { display: none; } }

/* ----------------------------------------------------------------- code + output */
.codeblock-wrap {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: var(--space-4);
}
@media (max-width: 1024px) { .codeblock-wrap { grid-template-columns: 1fr; } }

.codeblock {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex; flex-direction: column;
}
.codeblock-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-3);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
}
.codeblock-head .dots {
  display: inline-flex; gap: 6px;
}
.codeblock-head .dots i {
  width: 10px; height: 10px;
  border-radius: 50%;
  display: block;
  background: var(--bg-4);
  border: 1px solid var(--border-strong);
}
.codeblock-body {
  padding: 18px 20px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
  color: var(--text-1);
}
.codeblock-body .kw { color: #C792EA; }
.codeblock-body .fn { color: #82AAFF; }
.codeblock-body .str { color: #C3E88D; }
.codeblock-body .num { color: #F78C6C; }
.codeblock-body .com { color: var(--text-4); font-style: italic; }
.codeblock-body .var { color: var(--cyan); }
.codeblock-body .sym { color: #FFCB6B; }

/* output panel */
.output-panel {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-5);
  display: flex; flex-direction: column;
}
.output-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: var(--space-4);
}
.output-head h4 {
  font-family: var(--display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0;
  margin: 0;
  color: var(--text-1);
}
.output-head .badge {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
}
.output-panel svg { width: 100%; flex: 1; }
.output-foot {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px dashed var(--border-soft);
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.output-stat {
  display: grid; gap: 2px;
}
.output-stat .lbl {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}
.output-stat .val {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-1);
}
.output-stat .val .delta { font-size: 12px; color: var(--emerald); margin-left: 4px; }
.output-stat .val .delta.warn { color: var(--amber); }

/* ----------------------------------------------------------------- equations */
.eq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}
@media (max-width: 920px) { .eq-grid { grid-template-columns: 1fr; } }
.eq-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-5);
  min-width: 0;
}
.eq-card .eq-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: var(--space-2);
}
.eq-card .eq-title {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-4);
}
.eq-card .eq-body {
  padding: var(--space-4);
  background: var(--bg-1);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  font-size: 16px;
  color: var(--text-1);
}
.eq-card .eq-note {
  margin-top: var(--space-3);
  font-size: 13px;
  color: var(--text-3);
}

/* ----------------------------------------------------------------- results */
.results-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-5);
}
@media (max-width: 980px) { .results-grid { grid-template-columns: 1fr; } }
.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.results-table th, .results-table td {
  text-align: right;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-soft);
  font-variant-numeric: tabular-nums;
  font-family: var(--mono);
}
.results-table th:first-child, .results-table td:first-child {
  text-align: left;
  font-family: var(--sans);
}
.results-table th {
  color: var(--text-3);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.results-table tr.highlight td {
  background: rgba(91, 212, 255, 0.04);
  color: var(--text-1);
}
.results-table tr.highlight td:first-child {
  color: var(--cyan);
  font-weight: 600;
}

/* ----------------------------------------------------------------- applications */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}
@media (max-width: 1080px) { .apps-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .apps-grid { grid-template-columns: 1fr; } }
.app-card {
  padding: var(--space-5);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}
.app-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--arg-gold), transparent);
  opacity: 0;
  transition: opacity 0.25s;
}
.app-card:hover { border-color: var(--arg-celeste-dark); transform: translateY(-2px); }
.app-card:hover::before { opacity: 0.8; }
.app-card .icon {
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  display: grid; place-items: center;
  background: var(--bg-3);
  margin-bottom: var(--space-4);
  color: var(--cyan);
}
.app-card h3 {
  font-size: 16px;
  margin-bottom: var(--space-2);
}
.app-card p {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.6;
}

/* ----------------------------------------------------------------- cost stack */
.coststack {
  display: flex; height: 56px;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-2);
}
.coststack-seg {
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--bg-1);
  font-weight: 600;
  letter-spacing: 0.06em;
  position: relative;
  transition: flex 0.3s;
}
.coststack-legend {
  margin-top: var(--space-3);
  display: flex; flex-wrap: wrap; gap: 14px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
}
.coststack-legend .swatch {
  display: inline-block;
  width: 12px; height: 12px;
  border-radius: 3px;
  margin-right: 6px;
  vertical-align: middle;
}

/* ----------------------------------------------------------------- final cta */
.final-cta {
  padding: var(--space-10) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  scroll-margin-top: 72px;
}
.final-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 50% 50%, rgba(79, 139, 255, 0.16) 0%, transparent 70%);
  z-index: -1;
}
.final-cta h2 {
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 auto var(--space-5);
  max-width: 18ch;
}
.final-cta .gradient {
  background: var(--grad-storm);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.final-cta .ctas { display: inline-flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* Code copy button */
.codeblock-actions {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}
.copy-btn {
  appearance: none;
  background: var(--bg-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  color: var(--text-2);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 5px 10px;
  cursor: pointer;
  transition: all .2s;
}
.copy-btn:hover {
  border-color: var(--cyan);
  color: var(--text-1);
}
.copy-btn.copied {
  color: var(--emerald);
  border-color: var(--emerald);
}

/* Chart tooltips */
.chart-tooltip-group {
  pointer-events: none;
  opacity: 0;
  transition: opacity .15s;
}
.chart-tooltip-group.active { opacity: 1; }
.chart-tooltip-rect {
  fill: var(--bg-3);
  stroke: var(--border-strong);
  rx: 6;
}
.chart-tooltip-text {
  fill: var(--text-1);
  font-family: var(--mono);
  font-size: 11px;
}

/* Table wrap for mobile */
.table-wrap { overflow-x: auto; }

/* Noscript chart fallback */
oscript .chart-fallback {
  display: grid;
  gap: 8px;
  padding: 16px 0;
  font-family: var(--mono);
  font-size: 13px;
}
oscript .chart-fallback-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 12px;
  border-radius: var(--r-sm);
  background: var(--bg-1);
  border: 1px solid var(--border-soft);
}
noscript .chart-fallback-row.highlight {
  border-color: var(--cyan);
  background: rgba(91, 212, 255, 0.06);
}
noscript .chart-fallback-row span:last-child { color: var(--text-1); font-weight: 600; }

/* ----------------------------------------------------------------- interactive explorer */
.explorer-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--space-5);
}
@media (max-width: 980px) { .explorer-layout { grid-template-columns: 1fr; } }

.explorer-panel {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-5);
}
.explorer-controls { display: grid; gap: var(--space-5); }
.explorer-control { display: grid; gap: 8px; }
.control-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 8px;
}
.control-head label {
  font-family: var(--display);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
}
.control-value {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--cyan);
  min-width: 48px;
  text-align: right;
}
.control-unit {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-3);
}
.control-range {
  display: flex; justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-4);
}
.explorer-slider {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px;
  background: var(--bg-4);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}
.explorer-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--grad-storm);
  border: 2px solid var(--bg-1);
  box-shadow: 0 0 8px rgba(91,212,255,0.35);
  cursor: pointer;
  transition: transform .15s;
}
.explorer-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
.explorer-slider::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--grad-storm);
  border: 2px solid var(--bg-1);
  cursor: pointer;
}
.explorer-note { margin-top: 8px; line-height: 1.5; }

/* output area */
.explorer-output { display: grid; gap: var(--space-4); }
.explorer-kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
@media (max-width: 560px) { .explorer-kpis { grid-template-columns: 1fr; } }
.explorer-kpi {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-4);
  display: grid; gap: 4px;
}
.explorer-kpi-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}
.explorer-kpi-value {
  font-family: var(--display);
  font-size: 28px;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.02em;
}
.explorer-kpi-unit {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
}

/* portfolio stack bar */
.explorer-bars-title {
  font-family: var(--display);
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--text-1);
}
.stack-bar {
  display: flex;
  height: 56px;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--bg-1);
  border: 1px solid var(--border);
}
.stack-seg {
  flex: var(--w);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-family: var(--mono);
  font-size: 9px;
  color: var(--bg-1);
  letter-spacing: 0.04em;
  min-width: 0;
  transition: flex .35s cubic-bezier(0.4,0,0.2,1);
  position: relative;
  overflow: hidden;
}
.stack-seg.is-narrow span,
.stack-seg.is-narrow b,
.stack-seg.is-narrow i {
  display: none;
}
.stack-seg-tooltip {
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-3);
  color: var(--text-1);
  font-family: var(--mono);
  font-size: 9px;
  padding: 2px 6px;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .15s;
  white-space: nowrap;
  z-index: 2;
}
.stack-seg:hover .stack-seg-tooltip {
  opacity: 1;
}

/* stack segment gradient ids */
#seg-pv   { background: linear-gradient(135deg, #FFB454, #FF9243); }
#seg-bess { background: linear-gradient(135deg, #B58CFF, #9173FF); }
#seg-mate { background: linear-gradient(135deg, #5BD4FF, #4F8BFF); }
#seg-mater{ background: linear-gradient(135deg, #4FE4C1, #3FBFA3); }
#seg-matp { background: linear-gradient(135deg, #FF6E8A, #E85D75); }

/* mini charts row */
.explorer-mini {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
@media (max-width: 720px) { .explorer-mini { grid-template-columns: 1fr; } }

/* hedge gauge */
.hedge-gauge { padding: 8px 0; }
.hedge-track {
  height: 8px;
  background: var(--bg-1);
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.hedge-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--arg-gold), var(--arg-celeste));
  border-radius: 4px;
  transition: width .4s cubic-bezier(0.4,0,0.2,1);
}
.hedge-labels {
  display: flex; justify-content: space-between; margin-top: 8px;
  font-family: var(--mono); font-size: 10px; color: var(--text-3);
}
.hedge-pct { color: var(--arg-gold); font-weight: 600; }

/* ----------------------------------------------------------------- footer */
.footer {
  border-top: 1px solid var(--border-soft);
  padding: var(--space-7) 0 var(--space-5);
  font-size: 13px;
  color: var(--text-3);
}
.footer-row {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4);
}
.footer-brand { display: flex; align-items: center; gap: 10px; }
.footer-brand img { width: 24px; height: 24px; }
.footer-meta {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-soft);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-4);
  display: flex; justify-content: space-between; flex-wrap: wrap;
}

/* ----------------------------------------------------------------- utility */
.row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.muted { color: var(--text-3); }
.cyan { color: var(--cyan); }
.violet { color: var(--violet); }
.teal { color: var(--teal); }
.amber { color: var(--amber); }
.mono-12 { font-family: var(--mono); font-size: 12px; }
.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s, transform 0.6s;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* selection */
::selection { background: rgba(91, 212, 255, 0.25); color: var(--text-1); }

/* scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-1); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-strong); }

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}