/* About Page — How It Works */

/* ─── How It Works Hero ─────────────────────────────────────── */
.how-hero {
  padding: calc(var(--nav-height) + 80px) var(--container-padding) 80px;
  background: var(--color-bg);
}

.how-hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

/* Left column */
.how-hero__left {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.how-hero__title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 7vw, 7rem);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.how-hero__desc {
  font-size: clamp(0.9375rem, 1.2vw, 1.0625rem);
  color: var(--color-text-secondary);
  line-height: 1.75;
  max-width: 440px;
}

/* Right column: diagram */
.how-hero__diagram {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.how-hero__diagram .data-flow-v2 {
  width: 100%;
  max-width: 560px;
}

/* Responsive */
@media (max-width: 900px) {
  .how-hero__inner {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .how-hero__desc {
    max-width: 100%;
  }

  .how-hero__diagram {
    width: 100%;
    justify-content: center;
  }

  .how-hero__diagram .data-flow-v2 {
    max-width: 100%;
  }
}

/* Philosophy */
.philosophy__content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.philosophy .section-heading {
  font-size: clamp(4rem, 6vw, 6rem);
  letter-spacing: -0.03em;
}

.philosophy__content p {
  font-size: clamp(1.05rem, 1.54vw, 1.575rem);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.philosophy__content p:last-of-type {
  margin-bottom: 40px;
}

/* Philosophy Pull Quote */
.philosophy__pullquote {
  max-width: 800px;
  margin: 64px auto 0;
  text-align: center;
}

.philosophy__pullquote p {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.4;
  color: var(--color-text-secondary);
}

.philosophy__pullquote strong {
  color: var(--color-accent);
  font-weight: 700;
}

/* Assembly Timeline */
.timeline {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.timeline__step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 32px;
  align-items: start;
}

.timeline__number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.timeline__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.timeline__desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* Team Structure */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.team-card__role {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.team-card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.team-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* Data Flow Diagram v2 */
.data-flow-v2 {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Source project boxes */
.data-flow-v2__sources {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.data-flow-v2__source-row {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.data-flow-v2__source {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  text-align: center;
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  cursor: default;
  transition: background var(--transition-base), border-color var(--transition-base), color var(--transition-base);
}

.data-flow-v2__source:hover {
  background: var(--color-accent-glow);
  border-color: rgba(74, 222, 128, 0.4);
  color: var(--color-accent);
}

/* Rows */
.data-flow-v2__row {
  width: 100%;
}

.data-flow-v2__row--split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

/* Cards */
.data-flow-v2__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  text-align: center;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: border-color 0.35s ease, box-shadow 0.35s ease;
  cursor: default;
}

/* Rotating beam pseudo-element */
.data-flow-v2__card::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: conic-gradient(
    from 0deg,
    transparent 0deg,
    transparent 60deg,
    rgba(74, 222, 128, 0.9) 90deg,
    transparent 120deg,
    transparent 360deg
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
  animation: none;
}

/* Mask so only the border strip shows */
.data-flow-v2__card::after {
  content: '';
  position: absolute;
  inset: 2px;
  background: var(--color-surface);
  border-radius: calc(var(--radius-md) - 2px);
  z-index: 1;
}

/* All card children sit above the mask */
.data-flow-v2__card > * {
  position: relative;
  z-index: 2;
}

@keyframes beam-rotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.data-flow-v2__card:hover {
  border-color: transparent;
  box-shadow: 0 0 24px rgba(74, 222, 128, 0.2);
}

.data-flow-v2__card:hover::before {
  opacity: 1;
  animation: beam-rotate 1.8s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .data-flow-v2__card:hover::before {
    animation: none;
    opacity: 1;
  }
  .data-flow-v2__card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 0 16px rgba(74, 222, 128, 0.25);
  }
}

.data-flow-v2__card--foundation {
  max-width: 420px;
  margin: 0 auto;
}

.data-flow-v2__card--principal {
  max-width: 320px;
  margin: 0 auto;
  border-color: var(--color-accent);
  background: var(--color-surface);
}

.data-flow-v2__card--principal::after {
  background: var(--color-surface);
}

.data-flow-v2__label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.data-flow-v2__title {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}

.data-flow-v2__desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Output badge inside split cards */
.data-flow-v2__output {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

/* Single vertical connector (with arrowhead) */
.data-flow-v2__connector-single {
  width: 1px;
  height: 40px;
  background: var(--color-border);
  position: relative;
  margin: 16px auto;
}

.data-flow-v2__connector-single::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--color-border);
}

/* Converge connector: two arms → single arrow down
   Card centers sit at ~24% (left) and ~76% (right) of container width
   (based on 1fr 1fr grid with 32px gap at max 680px) */
.data-flow-v2__converge {
  position: relative;
  width: 100%;
  height: 64px;
  align-self: stretch;
  margin: 16px 0;
}

/* Left arm: vertical down from left card center, then horizontal right to center */
.data-flow-v2__converge::before {
  content: '';
  position: absolute;
  top: 0;
  left: calc(25% - 8px);
  width: calc(25% + 9px);
  height: 50%;
  border-left: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  border-bottom-left-radius: 3px;
}

/* Right arm: vertical down from right card center, then horizontal left to center */
.data-flow-v2__converge::after {
  content: '';
  position: absolute;
  top: 0;
  right: calc(25% - 8px);
  width: calc(25% + 9px);
  height: 50%;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  border-bottom-right-radius: 3px;
}

/* Center vertical line with arrowhead */
.data-flow-v2__converge-down {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 50%;
  background: var(--color-border);
}

.data-flow-v2__converge-down::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--color-border);
}

@media (max-width: 768px) {
  .about-hero {
    padding: calc(var(--nav-height) + 32px) 20px 56px;
  }

  .about-hero__inner {
    min-height: 560px;
    border-radius: 20px;
  }

  .about-hero__content {
    left: 24px;
    right: 24px;
    bottom: 24px;
    max-width: none;
    text-align: center;
  }

  .about-hero__content .hero-headline {
    max-width: none;
  }

  .about-hero__sub {
    margin-left: auto;
    margin-right: auto;
  }

  .about-hero__overlay {
    background:
      linear-gradient(180deg, rgba(0, 0, 0, 0.14) 0%, rgba(0, 0, 0, 0.3) 46%, rgba(0, 0, 0, 0.78) 100%);
  }

  .team-grid {
    grid-template-columns: 1fr;
  }

  .timeline__step {
    grid-template-columns: 48px 1fr;
    gap: 20px;
  }

  .data-flow-v2__row--split {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .data-flow-v2__row--split .data-flow-v2__card:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    border-bottom: none;
  }

  .data-flow-v2__row--split .data-flow-v2__card:last-child {
    border-radius: 0 0 var(--radius-md) var(--radius-md);
  }

  .data-flow-v2__sources {
    grid-template-columns: repeat(4, 1fr);
  }

  .data-flow-v2__converge {
    height: 40px;
  }

  .data-flow-v2__converge::before {
    left: 0;
    width: calc(50% + 1px);
  }

  .data-flow-v2__converge::after {
    right: 0;
    width: calc(50% + 1px);
  }

  .data-flow-v2__card--foundation,
  .data-flow-v2__card--principal {
    max-width: none;
  }
}