:root {
  --bg: #07080d;
  --bg-elevated: #0f1219;
  --bg-card: #12161f;
  --border: rgba(255, 255, 255, 0.065);
  --border-strong: rgba(255, 255, 255, 0.12);
  --text: #eef1f7;
  --muted: #8b93a7;
  --accent: #5ccbff;
  --accent-dim: rgba(92, 203, 255, 0.14);
  --accent-glow: rgba(92, 203, 255, 0.22);
  --radius: 16px;
  --radius-sm: 12px;
  --font-body: "DM Sans", system-ui, sans-serif;
  --font-display: "Outfit", system-ui, sans-serif;
  --page-pad: clamp(1.25rem, 4vw, 2rem);
  --content-max: 1240px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.35), 0 24px 64px rgba(0, 0, 0, 0.45);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  background-image: radial-gradient(ellipse 140% 90% at 50% -35%, #152536 0%, transparent 52%),
    radial-gradient(ellipse 80% 50% at 100% 50%, rgba(30, 58, 95, 0.35) 0%, transparent 55%),
    radial-gradient(ellipse 70% 45% at 0% 80%, rgba(20, 45, 62, 0.25) 0%, transparent 50%);
}

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 100% 75% at 50% -5%, black 0%, transparent 72%);
  z-index: 0;
}

.bg-glow {
  position: fixed;
  top: -20%;
  left: 50%;
  translate: -50% 0;
  width: min(140vw, 1800px);
  height: 55vh;
  pointer-events: none;
  background: radial-gradient(ellipse closest-side, rgba(92, 203, 255, 0.07), transparent 75%);
  z-index: 0;
}

.site-header,
.layout,
.site-footer {
  position: relative;
  z-index: 1;
}

/* ——— Hero: title uses full inner width (block stack, no side-by-side mark) ——— */
.site-header {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(15, 18, 25, 0.92) 0%, rgba(7, 8, 13, 0.35) 100%);
  backdrop-filter: blur(12px);
}

.header-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--page-pad);
  padding-bottom: clamp(1.75rem, 4vw, 2.5rem);
}

.header-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
  margin-bottom: 1.15rem;
}

.header-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  background: var(--accent-dim);
  border: 1px solid rgba(92, 203, 255, 0.22);
}

.header-meta-divider {
  width: 1px;
  height: 14px;
  background: var(--border-strong);
}

.header-byline {
  font-size: 0.875rem;
  color: var(--muted);
  font-weight: 500;
}

.brand-title {
  margin: 0 0 1rem;
  padding: 0;
  width: 100%;
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5.5vw, 3.35rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  text-wrap: balance;
  background: linear-gradient(135deg, #fff 12%, #c8d4e8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  margin: 0;
  width: 100%;
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.0625rem;
  line-height: 1.6;
}

/* ——— Main layout ——— */
.layout {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: clamp(1.5rem, 3vw, 2rem) var(--page-pad) clamp(2rem, 4vw, 3rem);
  display: grid;
  grid-template-columns: minmax(232px, 280px) minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: start;
}

.tabs-heading {
  margin: 0 0 0.65rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.tabs {
  margin: 0;
  padding: 1rem 0 1rem 1rem;
  position: sticky;
  top: 1rem;
  border-left: 1px solid var(--border);
}

.tabs-scroll {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  width: 100%;
}

.tab-btn {
  flex: 0 0 auto;
  appearance: none;
  width: 100%;
  margin-left: -1px;
  border: 1px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.68rem 0.85rem 0.68rem 1rem;
  cursor: pointer;
  transition: background 0.18s, color 0.18s, border-color 0.18s, box-shadow 0.18s;
  text-align: left;
  line-height: 1.38;
  border-left: 3px solid transparent;
}

.tab-btn:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.tab-btn[aria-selected="true"] {
  color: var(--text);
  background: rgba(92, 203, 255, 0.06);
  border-left-color: var(--accent);
  border-color: var(--border);
  border-left-width: 3px;
  box-shadow: 0 0 24px var(--accent-glow);
}

.panel {
  margin: 0;
  padding: 0;
  min-width: 0;
}

.answer {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 4vw, 2.35rem);
  box-shadow: var(--shadow);
}

.answer-kicker {
  margin: 0 0 0.5rem;
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

.answer h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  line-height: 1.28;
  letter-spacing: -0.025em;
  color: var(--text);
}

.answer-desc {
  margin: 0 0 1.75rem;
  color: var(--muted);
  max-width: 72ch;
  font-size: 1rem;
}

.answer-desc strong {
  color: var(--text);
  font-weight: 600;
}

.video-wrap {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-strong);
  background: #000;
  aspect-ratio: 16 / 9;
}

.video-wrap--vimeo {
  aspect-ratio: 4 / 3;
}

.video-wrap iframe,
.video-wrap video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-wrap video {
  object-fit: contain;
  background: #000;
}

.video-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 2rem;
  text-align: center;
  color: var(--muted);
  background: radial-gradient(circle at 50% 35%, var(--accent-dim), transparent 58%);
}

.video-placeholder strong {
  color: var(--text);
  font-size: 1.05rem;
}

.video-placeholder code {
  font-size: 0.85rem;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--accent);
}

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 1.75rem var(--page-pad) 2.5rem;
}

.site-footer p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--muted);
}

.site-footer code {
  font-size: 0.82rem;
  padding: 0.15rem 0.4rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

@media (max-width: 720px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .tabs {
    position: static;
    padding: 0;
    border-left: none;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1.25rem;
    margin-bottom: 0.25rem;
  }

  .tabs-scroll {
    gap: 0.4rem;
  }

  .tab-btn {
    margin-left: 0;
    border-radius: var(--radius-sm);
    border-left-width: 1px;
    border-left-color: var(--border);
  }

  .tab-btn[aria-selected="true"] {
    border-left-width: 1px;
    border-left-color: var(--accent);
    box-shadow: none;
  }

  .brand-title {
    font-size: clamp(1.85rem, 6.5vw, 2.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .tab-btn {
    transition: none;
  }
}

/* ——— Password gate ——— */
.gate-overlay {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--page-pad);
  background: rgba(5, 6, 10, 0.88);
  backdrop-filter: blur(14px);
}

.gate-panel {
  width: 100%;
  max-width: 400px;
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  box-shadow: var(--shadow);
}

.gate-brand {
  margin: 0 0 0.75rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.gate-heading {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  color: var(--text);
}

.gate-desc {
  margin: 0 0 1.5rem;
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.5;
}

.gate-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.gate-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
}

.gate-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  outline: none;
}

.gate-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.gate-error {
  min-height: 1.35rem;
  margin: 0;
  font-size: 0.875rem;
  color: #fb7185;
}

.gate-submit {
  margin-top: 0.35rem;
  padding: 0.85rem 1.25rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--bg);
  background: linear-gradient(135deg, var(--accent), #8ddbff);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.gate-submit:hover {
  filter: brightness(1.06);
}