/* MATCH — Mechanics page */

.mech-hero {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 48px;
}
.mech-hero-top {
  display: flex;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}
.mech-h1 {
  font-size: clamp(48px, 7vw, 104px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  margin: 0 0 32px;
  max-width: 1100px;
}
.mech-lede {
  font-size: 19px;
  line-height: 1.55;
  max-width: 720px;
  color: var(--fg-2);
  margin: 0 0 56px;
}
.mech-toc {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.mech-toc-item {
  background: var(--bg-1);
  padding: 18px 20px;
  display: flex;
  gap: 16px;
  align-items: baseline;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  color: var(--fg-2);
}
.mech-toc-item:hover {
  background: var(--bg-2);
  color: var(--fg);
}
.mech-toc-num {
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.08em;
}
.mech-toc-label {
  font-size: 14px;
}

/* ============ MechSection ============ */
.mech-section {
  border-top: 1px solid var(--line);
  padding: 80px 0;
}
.mech-section.is-highlight {
  background: linear-gradient(180deg, var(--accent-soft) 0%, transparent 30%);
  margin: 0 -24px;
  padding-left: 24px;
  padding-right: 24px;
}
.mech-section-head {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  margin-bottom: 56px;
  align-items: start;
}
.mech-section-num {
  font-size: 120px;
  line-height: 0.85;
  color: var(--fg-4);
}
.mech-section-meta {
  padding-top: 16px;
}
.mech-section-title {
  font-size: clamp(36px, 4.5vw, 64px);
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 8px 0 0;
}
.mech-section-body p,
.mech-prose {
  font-size: 17px;
  line-height: 1.65;
  margin: 0 0 18px;
  max-width: 680px;
  color: var(--fg-2);
}
.mech-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.mech-cols > div:first-child p {
  max-width: none;
}

.mech-spec {
  border: 1px solid var(--line);
  background: var(--bg-1);
}
.spec-row {
  display: flex;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.spec-row:last-child { border-bottom: none; }
.spec-label {
  color: var(--fg-3);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.spec-value { color: var(--fg); }
.spec-value.is-fire { color: var(--fire); }
.spec-value.is-accent { color: var(--accent); }

.hook-spec {
  margin-top: 32px;
  border: 1px solid var(--line);
  background: var(--bg-1);
}

/* ============ Phase diagram ============ */
.phase-diagram {
  margin-top: 32px;
  padding: 32px;
  background: var(--bg-1);
  border: 1px solid var(--line);
}
.phase-diagram-track {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: stretch;
}
.phase-diagram-segment {
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--bg);
}
.phase-diagram-segment-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.phase-diagram-segment-title {
  font-size: 36px;
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.phase-diagram-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.phase-diagram-bullets li {
  font-size: 13px;
  line-height: 1.5;
  color: var(--fg-2);
  padding-left: 16px;
  position: relative;
}
.phase-diagram-bullets li::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 6px; height: 1px;
  background: var(--fg-3);
}
.phase-diagram-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-width: 80px;
}
.phase-diagram-divider-line {
  width: 1px;
  flex: 1;
  background: linear-gradient(180deg, transparent, var(--accent), transparent);
  min-height: 80px;
}
.phase-diagram-divider-label {
  font-size: 11px;
  color: var(--accent);
  text-align: center;
  letter-spacing: 0.06em;
}

/* ============ Curve diagram ============ */
.curve-diagram {
  width: 100%;
  height: auto;
  background: var(--bg);
  border: 1px solid var(--line);
}
.curve-axis {
  font-family: var(--f-mono);
  font-size: 9px;
  fill: var(--fg-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.curve-axis-fire {
  font-family: var(--f-mono);
  font-size: 10px;
  fill: var(--fire);
  letter-spacing: 0.05em;
}
.curve-label {
  font-family: var(--f-mono);
  font-size: 10px;
  fill: var(--fg-2);
}

/* ============ Hook diagram ============ */
.hook-diagram {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: repeat(7, auto);
  gap: 0;
  border: 1px solid var(--line);
  background: var(--bg-1);
  padding: 24px;
  align-items: stretch;
  justify-items: stretch;
}
.hook-node {
  border: 1px solid var(--line);
  padding: 14px 16px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
}
.hook-node-hook {
  border-color: var(--accent);
  background: var(--accent-soft);
  position: relative;
  overflow: hidden;
}
.hook-node-hook::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 40px; height: 40px;
  background: radial-gradient(circle at top right, var(--accent-glow), transparent 70%);
}
.hook-node-burn {
  border-color: var(--fire);
  background: rgba(226,87,12,0.06);
}
.hook-burn-icon {
  position: absolute;
  top: 14px; right: 14px;
  color: var(--fire);
  font-size: 14px;
}
.hook-node-label { font-size: 12px; color: var(--fg); }
.hook-node-sub { font-size: 10px; color: var(--fg-3); }
.hook-arrow {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 32px;
  position: relative;
}
.hook-arrow::before {
  content: "";
  position: absolute;
  width: 1px;
  height: 100%;
  background: var(--line-2);
  left: 50%;
}
.hook-arrow span {
  font-family: var(--f-mono);
  font-size: 9px;
  color: var(--fg-3);
  background: var(--bg-1);
  padding: 0 6px;
  position: relative;
  z-index: 1;
}

/* ============ Flywheel ============ */
.flywheel {
  display: grid;
  grid-template-columns: repeat(9, auto);
  align-items: center;
  gap: 12px;
  padding: 32px;
  border: 1px solid var(--line);
  background: var(--bg-1);
  margin-top: 24px;
  overflow-x: auto;
}
.flywheel-step {
  border: 1px solid var(--line);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg);
  min-width: 160px;
  position: relative;
}
.flywheel-step-num {
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--fg-3);
}
.flywheel-step-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  margin: 8px 0;
}
.flywheel-step-label {
  font-size: 22px;
  line-height: 1;
  letter-spacing: -0.02em;
}
.flywheel-step-sub {
  font-size: 11px;
  color: var(--fg-3);
}
.flywheel-arrow {
  color: var(--fg-4);
  font-size: 14px;
  font-family: var(--f-mono);
}

/* ============ VRF diagram ============ */
.vrf-diagram {
  display: flex;
  align-items: stretch;
  margin-top: 24px;
  border: 1px solid var(--line);
  background: var(--bg-1);
  overflow-x: auto;
}
.vrf-step {
  flex: 1;
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 180px;
}
.vrf-step-num {
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.06em;
}
.vrf-step-label {
  font-size: 14px;
  color: var(--fg);
}
.vrf-divider {
  width: 1px;
  background: var(--line);
}

/* ============ Footer CTA ============ */
.mech-footer-cta {
  display: flex;
  justify-content: space-between;
  align-items: end;
  padding: 80px 0 32px;
  border-top: 1px solid var(--line);
}