/* Page shell: persistent left sidebar + scrolling main */

.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
  background: var(--bg);
}

/* ---------- Sidebar ---------- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  padding: var(--sp-6) var(--sp-5);
  background: var(--bg-tint);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
  z-index: 50;
  overflow-y: auto;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--ink);
  color: var(--on-primary);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: var(--fs-md);
  letter-spacing: -0.04em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
}

.brand-text span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: var(--tracking-wide);
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
}

.nav-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.nav-group-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--tracking-mega);
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: var(--sp-1);
  padding-left: var(--sp-2);
}

.nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-soft);
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
  position: relative;
}

.nav-item:hover {
  background: var(--surface);
  color: var(--text);
}

.nav-item.is-active {
  background: var(--surface-2);
  color: var(--text);
}

.nav-item.is-active::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 16px;
  background: var(--primary-deep);
  border-radius: 2px;
}

.nav-sub {
  margin-left: var(--sp-4);
  padding-left: var(--sp-3);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: var(--sp-1);
}

.nav-sub a {
  display: block;
  padding: 6px var(--sp-3);
  font-size: var(--fs-sm);
  font-weight: 400;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
}

.nav-sub a:hover {
  color: var(--text);
  background: var(--surface);
}

.sidebar-foot {
  padding: var(--sp-4) var(--sp-3);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.sidebar-foot strong {
  color: var(--text);
  font-size: var(--fs-sm);
  font-weight: 600;
}

.sidebar-foot a:hover { color: var(--primary-deep); }

/* Mobile drawer toggle */
.nav-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 60;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--bg-tint);
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text);
  position: relative;
  transition: transform var(--dur-fast) var(--ease-out);
}

.nav-toggle-bars::before { position: absolute; top: -6px; left: 0; }
.nav-toggle-bars::after  { position: absolute; top: 6px;  left: 0; }

.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(42, 40, 37, 0.4);
  z-index: 45;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}
.nav-backdrop.is-shown { display: block; opacity: 1; }

/* ---------- Main column ---------- */
.main {
  grid-column: 2;
  padding: 0;
  min-width: 0;
}

.section {
  padding: var(--sp-9) var(--content-pad);
  max-width: var(--content-max);
  margin: 0 auto;
}

.section--tight  { padding-top: var(--sp-7); padding-bottom: var(--sp-7); }
.section--alt    { background: var(--bg-tint); max-width: none; padding-left: 0; padding-right: 0; }
.section--alt > .section-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--content-pad);
}

.section-head {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--sp-7);
  margin-bottom: var(--sp-7);
  align-items: end;
}

.section-head__title h2 {
  margin-top: var(--sp-3);
}

.section-head__copy p {
  font-size: var(--fs-md);
  line-height: var(--lh-loose);
  color: var(--text-soft);
  max-width: 56ch;
}

/* ---------- Hero (pure-text manifesto) ---------- */
.hero {
  padding: clamp(96px, 14vh, 160px) var(--content-pad) var(--sp-9);
  max-width: var(--content-max);
  margin: 0 auto;
  position: relative;
}

.hero__meta {
  display: flex;
  gap: var(--sp-5);
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: var(--sp-6);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: var(--tracking-wide);
}

.hero__meta span { display: inline-flex; align-items: center; gap: var(--sp-2); }
.hero__meta .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--primary); }

.hero__statement {
  font-size: var(--fs-hero);
  font-weight: 400;
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--text);
  max-width: 16ch;
}

.hero__statement em {
  font-style: normal;
  font-weight: 500;
  color: var(--primary-deep);
  position: relative;
}

.hero__statement em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 6px;
  background: var(--accent);
  opacity: 0.45;
  border-radius: 3px;
}

.hero__sub {
  margin-top: var(--sp-6);
  font-size: var(--fs-md);
  line-height: var(--lh-loose);
  color: var(--text-soft);
  max-width: 60ch;
}

.hero__cta {
  margin-top: var(--sp-7);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  align-items: center;
}

.hero__index {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-5);
  margin-top: var(--sp-9);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--border);
}

.hero__index-item .num {
  font-family: var(--font-mono);
  font-size: var(--fs-2xl);
  font-weight: 500;
  color: var(--primary-deep);
  letter-spacing: -0.02em;
}

.hero__index-item .lbl {
  display: block;
  margin-top: var(--sp-2);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Decorative shapes */
.shape {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}

.shape--ring {
  top: 80px;
  right: 8%;
  width: 220px;
  height: 220px;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
}

.shape--ring::before {
  content: "";
  position: absolute;
  inset: 28px;
  border: 1px dashed var(--border-strong);
  border-radius: 50%;
}

.shape--bar {
  top: 320px;
  right: 4%;
  width: 96px;
  height: 4px;
  background: var(--accent);
  opacity: 0.5;
}

.hero > * { position: relative; z-index: 1; }