/* SITRA Magazine V3: static, mobile-first, no external dependencies */
:root {
  --brand: #2563eb;
  --brand-2: #06b6d4;
  --accent: #f59e0b;
  --dark: #07111f;
  --bg: #0b1020;
  --surface: #101827;
  --surface-2: #151f33;
  --panel: rgba(255, 255, 255, .08);
  --panel-strong: rgba(255, 255, 255, .12);
  --line: rgba(255, 255, 255, .14);
  --text-body: #e5edf8;
  --text-strong: #ffffff;
  --muted: #9fb0c7;
  --shadow: 0 24px 80px rgba(0, 0, 0, .32);
  --radius: 28px;
  --radius-sm: 16px;
  --wrap: 1168px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text-body);
  background:
    radial-gradient(circle at 12% -8%, color-mix(in srgb, var(--brand) 28%, transparent), transparent 28rem),
    radial-gradient(circle at 90% 8%, color-mix(in srgb, var(--brand-2) 22%, transparent), transparent 30rem),
    linear-gradient(180deg, var(--bg), var(--dark) 46%, #050812);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.68;
}
a { color: inherit; }
img, svg { max-width: 100%; height: auto; }
.wrap { width: min(var(--wrap), calc(100% - 32px)); margin-inline: auto; }
.narrow { max-width: 900px; }
.skip-link {
  position: absolute;
  top: -90px;
  left: 12px;
  z-index: 200;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--accent);
  color: #111827;
  font-weight: 900;
  text-decoration: none;
}
.skip-link:focus { top: 12px; }

.notice-line {
  color: rgba(255, 255, 255, .78);
  background: rgba(0, 0, 0, .32);
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.notice-inner {
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.notice-inner a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 900;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: color-mix(in srgb, var(--dark) 86%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.header-grid {
  min-height: 76px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.brand-letter {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  font-size: 22px;
  font-weight: 950;
  box-shadow: 0 16px 40px color-mix(in srgb, var(--brand) 28%, transparent);
}
.brand-mark strong {
  display: block;
  color: var(--text-strong);
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.08;
}
.brand-mark em {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
}
.main-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav a {
  padding: 10px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 850;
  text-decoration: none;
}
.main-nav a:hover {
  color: var(--text-strong);
  background: var(--panel);
}
.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--panel);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  border-radius: 999px;
  background: var(--text-strong);
}

.header-cta,
.primary-btn,
.secondary-btn {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 950;
  text-decoration: none;
}
.header-cta,
.primary-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 16px 42px color-mix(in srgb, var(--brand) 28%, transparent);
}
.secondary-btn {
  color: var(--text-strong);
  background: var(--panel);
  border: 1px solid var(--line);
}
.header-cta:hover,
.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-1px);
}

.cover-section {
  padding: clamp(38px, 7vw, 92px) 0 24px;
}
.cover-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: clamp(20px, 4vw, 42px);
  align-items: stretch;
}
.cover-story,
.cover-rail,
.story-card,
.editor-note,
.longread-card,
.table-shell,
.final-grid {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.cover-story {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 58px);
  border-radius: calc(var(--radius) + 12px);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface) 88%, transparent), color-mix(in srgb, var(--surface-2) 88%, transparent)),
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 20rem);
}
.cover-story::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -110px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--brand-2) 20%, transparent);
  pointer-events: none;
}
.breadcrumbs,
.eyebrow,
.cover-story h1,
.cover-lead,
.cta-row,
.topic-strip {
  position: relative;
  z-index: 1;
}
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 13px;
}
.breadcrumbs a {
  color: var(--accent);
  font-weight: 900;
  text-decoration: none;
}
.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 950;
  letter-spacing: .13em;
  text-transform: uppercase;
}
h1, h2, h3 { margin: 0; color: var(--text-strong); line-height: 1.08; }
h1 {
  max-width: 900px;
  font-size: clamp(38px, 7vw, 78px);
  letter-spacing: -.06em;
}
h2 {
  font-size: clamp(28px, 4.4vw, 52px);
  letter-spacing: -.045em;
}
h3 {
  font-size: clamp(20px, 2.6vw, 30px);
  letter-spacing: -.025em;
}
.cover-lead {
  max-width: 780px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2.2vw, 24px);
}
.cta-row,
.topic-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.cta-row { margin-top: 30px; }
.topic-strip { margin-top: 24px; }
.topic-strip span,
.chip {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 11px;
  border-radius: 999px;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  font-size: 13px;
  font-weight: 850;
}

.cover-rail {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 18px;
  border-radius: calc(var(--radius) + 10px);
  background: rgba(255, 255, 255, .04);
}
.rail-card,
.badge-card,
.fact-list li,
.signal-card,
.feature-stack > *,
.step-card {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: var(--radius-sm);
}
.rail-card,
.badge-card {
  padding: 20px;
}
.rail-card-accent {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--brand) 34%, transparent), color-mix(in srgb, var(--brand-2) 20%, transparent)),
    var(--panel);
}
.rail-card span,
.badge-card span {
  display: block;
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 950;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.rail-card strong,
.badge-card strong {
  display: block;
  color: var(--text-strong);
  font-size: 28px;
  line-height: 1.1;
}
.rail-card p,
.badge-card p {
  margin: 12px 0 0;
  color: var(--muted);
}
.fact-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}
.fact-list li {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 14px;
}
.fact-list b {
  color: var(--accent);
  text-align: right;
}

.quick-band { padding: 18px 0 0; }
.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.signal-card {
  padding: 18px;
}
.signal-card strong {
  display: block;
  color: var(--text-strong);
}
.signal-card span,
.signal-card p {
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: clamp(56px, 8vw, 94px) 0;
}
.muted-section {
  background: linear-gradient(180deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, .015));
  border-block: 1px solid var(--line);
}
.editorial-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 22px;
  align-items: start;
}
.story-card,
.editor-note,
.longread-card {
  padding: clamp(22px, 4vw, 38px);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
}
.editor-note {
  position: sticky;
  top: 98px;
}
.story-card-dark {
  background:
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 18rem),
    color-mix(in srgb, var(--surface-2) 88%, transparent);
}
.copy {
  color: var(--text-body);
  font-size: 17px;
}
.copy > :first-child { margin-top: 0; }
.copy > :last-child { margin-bottom: 0; }
.copy p { margin: 16px 0; }
.copy a { color: var(--accent); font-weight: 850; }
.copy ul,
.copy ol {
  padding-left: 22px;
}
.copy li + li { margin-top: 8px; }
.compact-copy { font-size: 15px; color: var(--muted); }

.section-heading {
  max-width: 820px;
  margin: 0 auto 28px;
  text-align: center;
}
.section-heading.align-left {
  margin-left: 0;
  text-align: left;
}
.section-heading p {
  color: var(--muted);
  font-size: 18px;
}
.intent-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.intent-card {
  min-height: 220px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.intent-card span {
  display: inline-flex;
  margin-bottom: 22px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 950;
}
.intent-card p {
  color: var(--muted);
}

.feature-split {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}
.feature-stack {
  display: grid;
  gap: 14px;
}
.feature-stack > * {
  padding: 20px;
}
.safe-box {
  margin-top: 24px;
  padding: 18px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--accent) 13%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 34%, transparent);
}
.safe-box strong {
  display: block;
  color: var(--text-strong);
}
.safe-box p {
  margin: 8px 0 0;
  color: var(--muted);
}

.step-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  counter-reset: steps;
}
.step-card {
  position: relative;
  padding: 54px 20px 20px;
  min-height: 210px;
  counter-increment: steps;
}
.step-card::before {
  content: counter(steps, decimal-leading-zero);
  position: absolute;
  top: 18px;
  left: 20px;
  color: var(--accent);
  font-weight: 950;
  letter-spacing: .08em;
}
.step-card p {
  color: var(--muted);
}

.table-shell {
  overflow-x: auto;
  border-radius: var(--radius);
  background: var(--panel);
}
table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
}
th,
td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
th {
  color: var(--text-strong);
  background: rgba(255, 255, 255, .05);
}
td {
  color: var(--text-body);
}

.faq-list {
  display: grid;
  gap: 12px;
}
.faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel);
  overflow: hidden;
}
.faq-list summary {
  cursor: pointer;
  padding: 18px 20px;
  color: var(--text-strong);
  font-weight: 950;
}
.faq-list details[open] summary {
  border-bottom: 1px solid var(--line);
}
.faq-list details > *:not(summary) {
  margin: 0;
  padding: 0 20px 18px;
  color: var(--muted);
}

.longread-section {
  background:
    radial-gradient(circle at 5% 0%, color-mix(in srgb, var(--brand) 20%, transparent), transparent 24rem),
    #050812;
}
.longread-card {
  background: rgba(255, 255, 255, .055);
}
.long-copy h2,
.long-copy h3 {
  margin-top: 32px;
}
.long-copy table {
  margin: 22px 0;
}

.final-panel {
  padding: clamp(42px, 7vw, 74px) 0;
}
.final-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: clamp(24px, 5vw, 42px);
  border-radius: calc(var(--radius) + 8px);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--brand) 26%, transparent), color-mix(in srgb, var(--brand-2) 14%, transparent)),
    var(--panel);
}
.final-grid p {
  max-width: 740px;
  color: var(--muted);
}

.site-footer {
  padding: 34px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, .28);
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: start;
}
.footer-grid strong {
  color: var(--text-strong);
}
.footer-grid nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-grid nav a {
  color: var(--muted);
  text-decoration: none;
}
.footer-grid small {
  grid-column: 1 / -1;
}

@media (max-width: 1040px) {
  .cover-grid,
  .editorial-layout,
  .feature-split {
    grid-template-columns: 1fr;
  }
  .cover-rail {
    grid-template-columns: repeat(2, 1fr);
  }
  .fact-list {
    grid-column: 1 / -1;
  }
  .quick-grid,
  .step-board {
    grid-template-columns: repeat(2, 1fr);
  }
  .intent-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .editor-note {
    position: static;
  }
}

@media (max-width: 760px) {
  .wrap { width: min(100% - 24px, var(--wrap)); }
  .notice-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 8px 0;
  }
  .header-grid {
    grid-template-columns: auto auto;
  }
  .nav-toggle {
    display: block;
    justify-self: end;
  }
  .main-nav,
  .header-cta {
    display: none;
  }
  .site-header.open .main-nav {
    grid-column: 1 / -1;
    display: grid;
    width: 100%;
    padding-bottom: 14px;
  }
  .site-header.open .header-cta {
    grid-column: 1 / -1;
    display: inline-flex;
    width: 100%;
    margin-bottom: 16px;
  }
  .cover-story,
  .story-card,
  .editor-note,
  .longread-card,
  .final-grid {
    border-radius: 22px;
  }
  .cover-rail,
  .intent-grid,
  .quick-grid,
  .step-board {
    grid-template-columns: 1fr;
  }
  .cta-row .primary-btn,
  .cta-row .secondary-btn,
  .final-grid .primary-btn {
    width: 100%;
  }
  .final-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
}