/* ================================================================
   METHOD SECTION — "The Luminous Roadmap"
   A natural-scroll, alternating-card timeline where a glowing
   accent beam draws itself downward as the user scrolls, triggering
   each method card to slide in and "lock" onto the central track.

   Layout: 3-column CSS Grid
     Column 1 (1fr)  — left card area
     Column 2 (80px) — central track + node dots
     Column 3 (1fr)  — right card area
================================================================ */

/* ── Section wrapper ────────────────────────────────────────── */
.hs-method {
  padding-block: var(--hs-section-pad-y-lg);
  padding-inline: var(--hs-container-pad-x);
  background-color: transparent; /* sky shows through */
  position: relative;
}

/* ── Section header ─────────────────────────────────────────── */
.hs-method__header {
  max-width: var(--hs-container-md);
  margin-inline: auto;
  text-align: center;
  margin-bottom: var(--hs-space-20);
}

.hs-method__eyebrow {
  color: var(--hs-color-text-accent);
  margin-bottom: var(--hs-space-4);
  display: block;
}

.hs-method__headline {
  font-family: var(--hs-font-display);
  font-size: var(--hs-text-section-h);
  font-weight: var(--hs-font-extrabold);
  line-height: var(--hs-leading-heading);
  letter-spacing: var(--hs-tracking-tight);
  color: var(--hs-color-text-brand);
  margin-bottom: var(--hs-space-5);
}

.hs-method__sub {
  font-family: var(--hs-font-body);
  font-size: var(--hs-text-lg);
  line-height: var(--hs-leading-relaxed);
  color: var(--hs-color-text-secondary);
  max-width: 52ch;
  margin-inline: auto;
}

/* ── Timeline container ─────────────────────────────────────── */
/* Positions the track, nodes, and cards together.              */
/* overflow-x: clip hard-clips GSAP slide-in cards that briefly */
/* translate beyond the viewport edge (especially on mobile)    */
/* without creating a scroll container — safe for Lenis.        */
.hs-method__timeline {
  position: relative;
  max-width: var(--hs-container-xl);
  margin-inline: auto;
  overflow-x: clip;
}

/* ── Central track ──────────────────────────────────────────── */
/* The faint background rail that the beam draws on top of.     */
.hs-method__track {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  transform: translateX(-50%);
  width: var(--hs-border-3); /* 2px rail */
  background: var(--hs-color-border-accent-subtle);
  z-index: 0;
}

/* ── The glowing beam ───────────────────────────────────────── */
/* Starts at scaleY(0). GSAP scales it from the top downward.   */
.hs-method__beam {
  position: absolute;
  inset: 0;
  background: var(--hs-gradient-accent-vertical);
  transform: scaleY(0);
  transform-origin: top center;
  border-radius: var(--hs-radius-full);
  /* Soft cyan glow halo around the beam */
  box-shadow:
    0 0 12px 3px rgba(43, 197, 241, 0.40),
    0 0 28px 6px rgba(43, 197, 241, 0.18);
  backface-visibility: hidden;
}

/* ── Method rows — the 3-column grid ───────────────────────── */
.hs-method__row {
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  align-items: center;
  gap: 0;
  position: relative;
  z-index: 1;
  margin-bottom: var(--hs-space-24);
}

.hs-method__row:last-child {
  margin-bottom: 0;
}

/* Column 2 — the node sits in the center column */
.hs-method__node {
  grid-column: 2;
  justify-self: center;
  width: var(--hs-space-5);   /* 1.25rem */
  height: var(--hs-space-5);
  border-radius: var(--hs-radius-full);
  background: var(--hs-color-bg-page);
  border: var(--hs-border-3) solid var(--hs-color-border-accent-subtle);
  position: relative;
  z-index: 2;
  transition: border-color var(--hs-transition-base);
  backface-visibility: hidden;
}

/* Lit state — triggered by GSAP adding .is-lit class */
.hs-method__node.is-lit {
  border-color: var(--hs-palette-accent-500);
  background: var(--hs-palette-accent-600);
  box-shadow:
    0 0 0 5px rgba(43, 197, 241, 0.18),
    0 0 20px 4px rgba(43, 197, 241, 0.35);
}

/* Spacer: the empty cell on the opposite side of the card */
.hs-method__spacer {
  min-height: var(--hs-space-4);
}

/* ── Method cards ───────────────────────────────────────────── */
.hs-method__card {
  background: var(--hs-glass-bg);
  backdrop-filter: var(--hs-glass-blur);
  -webkit-backdrop-filter: var(--hs-glass-blur);
  border: var(--hs-border-1) solid var(--hs-glass-border);
  border-radius: var(--hs-radius-2xl);
  box-shadow: var(--hs-glass-shadow);
  padding: var(--hs-space-8);
  display: flex;
  flex-direction: column;
  gap: var(--hs-space-5);
  backface-visibility: hidden;
  -webkit-font-smoothing: antialiased;

  /* Pre-animation state: off to the left or right, invisible */
  opacity: 0;

  /* Edge-light highlight */
  position: relative;
  overflow: hidden;
  transition:
    box-shadow var(--hs-transition-base),
    background var(--hs-transition-base);
}

/* Left cards translate in from the left */
.hs-method__card[data-side='left'] {
  transform: translateX(-60px);
  grid-column: 1;
  text-align: right;
}

/* Right cards translate in from the right */
.hs-method__card[data-side='right'] {
  transform: translateX(60px);
  grid-column: 3;
  text-align: left;
}

.hs-method__card:hover {
  background: var(--hs-glass-bg-hover);
  box-shadow: var(--hs-glass-shadow-hover);
}

/* Edge-light via ::before */
.hs-method__card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    140deg,
    var(--hs-glass-edge-top)  0%,
    var(--hs-glass-edge-left) 30%,
    transparent               65%
  );
  pointer-events: none;
}

/* ── Card internals ─────────────────────────────────────────── */
.hs-method__card-header {
  display: flex;
  align-items: center;
  gap: var(--hs-space-4);
}

/* Reverse order for right-aligned left cards */
.hs-method__card[data-side='left'] .hs-method__card-header {
  flex-direction: row-reverse;
  justify-content: flex-start;
}

.hs-method__card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--hs-space-12);
  height: var(--hs-space-12);
  background: var(--hs-color-bg-accent-subtle);
  border-radius: var(--hs-radius-lg);
  padding: var(--hs-space-3);
  flex-shrink: 0;
}

.hs-method__card-num {
  font-family: var(--hs-font-display);
  font-size: var(--hs-text-4xl);
  font-weight: var(--hs-font-extrabold);
  color: var(--hs-color-border-accent-subtle);
  line-height: 1;
  letter-spacing: var(--hs-tracking-tighter);
  flex: 1;
}

/* Left card: number on the left of the icon (reversed flex) */
.hs-method__card[data-side='left'] .hs-method__card-num {
  text-align: left;
}

.hs-method__card-title {
  font-family: var(--hs-font-display);
  font-size: var(--hs-text-2xl);
  font-weight: var(--hs-font-semibold);
  line-height: var(--hs-leading-snug);
  color: var(--hs-color-text-brand);
}

.hs-method__card-body {
  font-family: var(--hs-font-body);
  font-size: var(--hs-text-base);
  line-height: var(--hs-leading-relaxed);
  color: var(--hs-color-text-secondary);
}

/* ── Footer ─────────────────────────────────────────────────── */
.hs-method__footer {
  max-width: var(--hs-container-sm);
  margin-inline: auto;
  text-align: center;
  padding-top: var(--hs-space-20);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--hs-space-8);
}

.hs-method__closing {
  font-family: var(--hs-font-display);
  font-size: var(--hs-text-xl);
  font-weight: var(--hs-font-medium);
  line-height: var(--hs-leading-relaxed);
  color: var(--hs-color-text-secondary);
  font-style: italic;
}

/* ── Tablet: 1024px → 769px — alternating layout stays ──────── */
@media (max-width: 1024px) {
  .hs-method__header {
    margin-bottom: var(--hs-space-12);
  }

  .hs-method__row {
    margin-bottom: var(--hs-space-16);
  }

  .hs-method__card {
    padding: var(--hs-space-6);
  }

  .hs-method__card-num {
    font-size: var(--hs-text-2xl);
  }

  .hs-method__card-title {
    font-size: var(--hs-text-xl);
  }

  .hs-method__footer {
    padding-top: var(--hs-space-12);
  }
}

/* ── Mid-tablet: 768px — collapse to left-edge track ────────── */
@media (max-width: 768px) {
  .hs-method__row {
    grid-template-columns: 48px 1fr;
    margin-bottom: var(--hs-space-8);
  }

  .hs-method__track {
    left: 24px;
    transform: none;
  }

  .hs-method__node {
    grid-column: 1;
  }

  .hs-method__card[data-side='left'],
  .hs-method__card[data-side='right'] {
    grid-column: 2;
    text-align: left;
    transform: translateX(40px);
  }

  .hs-method__spacer {
    display: none;
  }

  .hs-method__card[data-side='left'] .hs-method__card-header {
    flex-direction: row;
    justify-content: flex-start;
  }

  .hs-method__card-num {
    font-size: var(--hs-text-xl);
  }

  .hs-method__card-title {
    font-size: var(--hs-text-lg);
  }

  .hs-method__card {
    padding: var(--hs-space-5);
  }
}

/* ── Mobile: ≤425px ─────────────────────────────────────────── */
@media (max-width: 425px) {
  .hs-method__header {
    margin-bottom: var(--hs-space-10);
  }

  .hs-method__sub {
    font-size: var(--hs-text-base);
  }

  .hs-method__row {
    grid-template-columns: 40px 1fr;
    margin-bottom: var(--hs-space-6);
  }

  .hs-method__track {
    left: 20px;
  }

  .hs-method__card {
    padding: var(--hs-space-4) var(--hs-space-5);
    gap: var(--hs-space-3);
  }

  .hs-method__card-icon {
    width: var(--hs-space-10);
    height: var(--hs-space-10);
    padding: var(--hs-space-2-5);
  }

  .hs-method__card-num {
    font-size: var(--hs-text-lg);
  }

  .hs-method__card-title {
    font-size: var(--hs-text-md);
  }

  .hs-method__card-body {
    font-size: var(--hs-text-sm);
  }

  .hs-method__footer {
    padding-top: var(--hs-space-10);
    gap: var(--hs-space-6);
  }

  .hs-method__closing {
    font-size: var(--hs-text-base);
  }

  .hs-method__cta {
    width: 100%;
    justify-content: center;
  }
}

/* ── Reduced motion ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .hs-method__beam,
  .hs-method__card,
  .hs-method__node {
    transition: none;
  }

  /* Show everything at rest without animation */
  .hs-method__beam {
    transform: scaleY(1);
  }

  .hs-method__card {
    opacity: 1;
    transform: none;
  }

  .hs-method__node {
    border-color: var(--hs-palette-accent-500);
    background: var(--hs-palette-accent-600);
  }
}