:root {
  --bg-primary: #080a0d;
  --bg-secondary: #101318;
  --card: #151a21;
  --card-strong: #1a212b;
  --text-primary: #f5f7fa;
  --text-secondary: #9ca3af;
  --accent: #19c37d;
  --accent-soft: rgba(25, 195, 125, 0.14);
  --danger: #ef4444;
  --warning: #f59e0b;
  --line: rgba(255,255,255,0.08);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  --radius: 22px;
  --radius-sm: 14px;
  --shell: 1200px;
}

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

html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  background:
    radial-gradient(circle at top right, rgba(59,130,246,0.14), transparent 26%),
    linear-gradient(180deg, #0b0f14 0%, var(--bg-primary) 40%, #07090c 100%);
  color: var(--text-primary);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
.shell { width: min(calc(100% - 2rem), var(--shell)); margin: 0 auto; }
.shell--narrow { width: min(calc(100% - 2rem), 860px); }
.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}
.skip-link:focus {
  clip: auto;
  width: auto;
  height: auto;
  margin: 1rem;
  padding: .75rem 1rem;
  background: var(--accent);
  color: #05140d;
  z-index: 1000;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(8, 10, 13, 0.78);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 82px;
}
.site-branding__link {
  display: inline-flex;
  align-items: center;
  gap: .85rem;
  font-weight: 800;
}
.site-branding__mark {
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #117a5b);
  color: #03110b;
}
.primary-nav__menu,
.footer-nav,
.signal-card__stats,
.module-list { list-style: none; margin: 0; padding: 0; }
.primary-nav__menu { display: flex; gap: 1.25rem; align-items: center; }
.primary-nav__menu a,
.footer-nav a { color: var(--text-secondary); }
.primary-nav__menu a:hover,
.footer-nav a:hover { color: var(--text-primary); }
.header-actions { display: flex; gap: .75rem; align-items: center; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 1.25rem;
  border-radius: 999px;
  background: var(--accent);
  color: #04150d;
  font-weight: 700;
  border: 1px solid transparent;
}
.button:hover { filter: brightness(1.05); }
.button--ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--line);
}
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 14px;
  width: 48px;
  height: 48px;
  padding: 0;
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--text-primary);
}
.hero,
.section { padding: 5rem 0; }
.hero__grid,
.site-footer__grid,
.cta {
  display: grid;
  gap: 2rem;
}
.hero__grid {
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  align-items: center;
  min-height: calc(100vh - 82px);
}
.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(2.8rem, 5vw, 5.2rem); line-height: 1; max-width: 11ch; }
h2 { font-size: clamp(2rem, 3vw, 3rem); line-height: 1.1; }
h3 { font-size: 1.2rem; }
.hero__lead,
.section-note,
.site-footer p,
.post-card p,
.entry-content,
.archive-description { color: var(--text-secondary); }
.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; margin: 2rem 0 1rem; }
.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.02));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}
.terminal-grid__header,
.terminal-grid__body,
.cards-grid,
.site-footer__grid,
.site-footer__meta {
  display: grid;
  gap: 1rem;
}
.terminal-grid__header {
  grid-template-columns: repeat(3, 1fr);
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--text-secondary);
}
.terminal-grid__body div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.cards-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cards-grid--three .card { min-height: 220px; }
.section--muted { background: rgba(255,255,255,0.02); border-block: 1px solid var(--line); }
.section-heading { margin-bottom: 2rem; max-width: 780px; }
.module-list li,
.signal-card__stats li {
  padding: .85rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.signal-card__symbol {
  color: var(--accent);
  font-weight: 800;
  letter-spacing: .12em;
}
.cta {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  background: linear-gradient(135deg, rgba(59,130,246,0.13), rgba(25,195,125,0.1));
}
.archive-list { display: grid; gap: 1.25rem; }
.post-card h2 a:hover { color: var(--accent); }
.page-header { margin: 3rem 0 2rem; }
.entry-summary { color: var(--text-secondary); max-width: 62ch; }
.content-flow > * + * { margin-top: 1rem; }
.content-panel,
.academy-outline,
.notice-card,
.auth-form,
.calculator-form { padding: 1.5rem; }
.split-head,
.signal-card__top,
.dashboard-grid,
.dashboard-main,
.calculator-results,
.data-table__row { display: grid; gap: 1rem; }
.split-head,
.signal-card__top { grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: center; }
.signal-card__top { margin-bottom: 1rem; }
.pill {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: .35rem .8rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: .78rem;
  font-weight: 800;
}
.module-list li { display: grid; grid-template-columns: auto 1fr; gap: 1rem; }
.dashboard-grid { grid-template-columns: 260px minmax(0, 1fr); }
.dashboard-sidebar a {
  padding: .85rem 1rem;
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  color: var(--text-secondary);
}
.dashboard-sidebar a:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
.dashboard-main { align-content: start; }
.metric-card span { color: var(--text-secondary); }
.metric-card strong { display: block; margin-top: .45rem; font-size: 2rem; }
.data-table__row {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: .9rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.data-table__row--head {
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: .8rem;
  letter-spacing: .08em;
}
.auth-form,
.calculator-form { display: grid; gap: 1rem; }
.auth-form label,
.calculator-form label {
  display: grid;
  gap: .5rem;
  color: var(--text-secondary);
}
.auth-form input,
.calculator-form input {
  min-height: 48px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  color: var(--text-primary);
  padding: 0 .9rem;
}
.checkbox-row { grid-template-columns: auto 1fr; align-items: start; }
.form-message {
  margin: 0;
  padding: .8rem 1rem;
  border-radius: 14px;
}
.form-message--error { background: rgba(239,68,68,0.12); color: #fca5a5; }
.form-message--success { background: rgba(25,195,125,0.12); color: #86efac; }
.calculator-results {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding-top: 1rem;
}
.calculator-results div {
  padding: 1rem;
  border-radius: 18px;
  background: rgba(255,255,255,0.03);
}
.calculator-results span {
  display: block;
  color: var(--text-secondary);
  margin-bottom: .4rem;
}
.calculator-results strong { font-size: 1.6rem; }
.site-footer { padding: 4rem 0 2rem; border-top: 1px solid var(--line); }
.site-footer__grid { grid-template-columns: 1.2fr .8fr .9fr; }
.site-footer__meta {
  grid-template-columns: repeat(2, auto);
  justify-content: space-between;
  padding-top: 2rem;
  color: var(--text-secondary);
}

@media (max-width: 1024px) {
  .hero__grid,
  .cards-grid,
  .site-footer__grid,
  .cta,
  .dashboard-grid,
  .calculator-results,
  .split-head,
  .signal-card__top,
  .data-table__row { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .menu-toggle { display: inline-block; }
  .primary-nav {
    position: absolute;
    inset: calc(100% + 1px) 1rem auto;
  }
  .primary-nav__menu {
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: rgba(10, 13, 18, 0.98);
    border: 1px solid var(--line);
    padding: 1rem;
    border-radius: 18px;
  }
  .primary-nav__menu.is-open { display: flex; }
  .header-actions { display: none; }
  .hero,
  .section { padding: 3.5rem 0; }
  h1 { font-size: clamp(2.3rem, 12vw, 3.7rem); }
}