/* ██████████████████████████████████████████████████████████
   §4  PROCESS FLOW (v4.0 — Professional Upgrade)
   ──────────────────────────────────────────────────────────
   HTML source: process_flow.php (frontend partial)
   Class names: .process-flow-section, .process-flow-header,
     .pf-eyebrow, .process-flow-title, .process-flow-subtitle,
     .process-flow-wrapper, .process-flow-scroll,
     .process-flow-steps, .process-flow-step,
     .pf-step-number, .process-flow-icon,
     .process-flow-step-title, .process-flow-step-desc,
     .pf-nav, .pf-fade, .has-connector
   ──────────────────────────────────────────────────────────
   Upgrade Notes (v4.0):
   • Added eyebrow label styling
   • Added step number badge
   • Added connector lines between cards
   • Added scroll fade indicators (left/right)
   • Added scroll snap for smoother UX
   • Added ambient glow (radial gradient bg)
   • Improved vertical mobile layout with timeline
   • Improved responsive scaling at all breakpoints
   • All class names backwards-compatible with v3.0
   ██████████████████████████████████████████████████████████ */

.process-flow-section {
  padding: var(--mt-section-py) 0;
  background: var(--mt-gradient-surface-r);
  position: relative;
  overflow: hidden;
}

/* Ambient glow */
.process-flow-section::before {
  content: "";
  position: absolute;
  top: -25%;
  left: -15%;
  width: 55%;
  height: 55%;
  background: radial-gradient(
    circle,
    rgba(var(--mt-brand-primary-rgb), 0.05),
    transparent 70%
  );
  pointer-events: none;
}

/* ── Header ── */
.process-flow-header {
  max-width: 760px;
  margin-inline: auto;
  text-align: center;
  margin-bottom: var(--mt-space-12);
}

/* Eyebrow (optional label above title) */
.pf-eyebrow {
  display: inline-block;
  font-size: var(--mt-text-xs);
  font-weight: var(--mt-weight-bold);
  letter-spacing: var(--mt-tracking-widest);
  text-transform: uppercase;
  color: var(--mt-brand-primary);
  margin-bottom: var(--mt-space-3);
  position: relative;
  padding-left: 20px;
}

.pf-eyebrow::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 3px;
  background: var(--mt-brand-primary);
  border-radius: var(--mt-radius-full);
  transform: translateY(-50%);
}

.process-flow-title {
  font-weight: var(--mt-weight-black);
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  margin-bottom: var(--mt-space-4);
  color: var(--mt-text-heading);
  letter-spacing: var(--mt-tracking-tight);
}

.process-flow-subtitle {
  font-size: var(--mt-text-md);
  color: var(--mt-text-muted);
  line-height: var(--mt-leading-relaxed);
  max-width: 640px;
  margin-inline: auto;
}

/* ── Scroll Wrapper ── */
.process-flow-wrapper {
  position: relative;
}

.process-flow-scroll {
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  cursor: grab;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
}

.process-flow-scroll:active,
.process-flow-scroll.is-dragging {
  cursor: grabbing;
  scroll-snap-type: none;
}

.process-flow-scroll::-webkit-scrollbar {
  display: none;
}

/* ── Steps Grid ── */
.process-flow-steps {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(260px, 1fr);
  gap: var(--mt-space-6);
  padding: var(--mt-space-4) var(--mt-space-6) var(--mt-space-6);
  list-style: none;
  margin: 0;
}

@media (min-width: 992px) {
  .process-flow-steps {
    grid-auto-columns: calc((100% - (3 * var(--mt-space-6))) / 4);
  }
}

/* ── Step Card — Enhanced ── */
.process-flow-step {
  position: relative;
  background: var(--mt-surface-raised);
  border: 1px solid var(--mt-border-default);
  border-radius: var(--mt-radius-xl);
  padding: 44px 28px 36px;
  text-align: center;
  overflow: hidden;
  scroll-snap-align: start;
  transition:
    transform var(--mt-duration-slow) var(--mt-ease-default),
    box-shadow var(--mt-duration-slow) var(--mt-ease-default),
    border-color var(--mt-duration-slow) var(--mt-ease-default);
}

/* Top accent (visible on hover) */
.process-flow-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 3px;
  background: var(--mt-gradient-primary);
  opacity: 0;
  border-radius: 0 0 var(--mt-radius-xs) var(--mt-radius-xs);
  transition: opacity var(--mt-duration-slow) ease;
}

.process-flow-step:hover {
  transform: translateY(-8px);
  box-shadow:
    0 24px 56px rgba(0, 0, 0, 0.10),
    0 8px 20px rgba(var(--mt-brand-primary-rgb), 0.06);
  border-color: rgba(var(--mt-brand-primary-rgb), 0.20);
}

.process-flow-step:hover::before {
  opacity: 1;
}

/* ── Connector Line (between cards — desktop only) ── */
.process-flow-step.has-connector::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -14px;
  width: 26px;
  height: 2px;
  background: linear-gradient(
    90deg,
    rgba(var(--mt-brand-primary-rgb), 0.25),
    rgba(var(--mt-brand-primary-rgb), 0.08)
  );
  transform: translateY(-50%);
  z-index: 1;
  pointer-events: none;
}

/* ── Step Number Badge ── */
.pf-step-number {
  position: absolute;
  top: 14px;
  left: 18px;
  font-size: 0.68rem;
  font-weight: var(--mt-weight-bold);
  color: var(--mt-brand-primary);
  background: rgba(var(--mt-brand-primary-rgb), 0.08);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.5px;
  transition:
    background var(--mt-duration-slow) ease,
    color var(--mt-duration-slow) ease;
}

.process-flow-step:hover .pf-step-number {
  background: var(--mt-brand-primary);
  color: var(--mt-text-inverse);
}

/* ── Icon ── */
.process-flow-icon {
  width: 68px;
  height: 68px;
  margin: 0 auto var(--mt-space-5);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(var(--mt-brand-primary-rgb), 0.07);
  color: var(--mt-brand-primary);
  font-size: 1.6rem;
  transition:
    background var(--mt-duration-slow) ease,
    color var(--mt-duration-slow) ease,
    transform var(--mt-duration-slow) var(--mt-ease-spring);
}

.process-flow-step:hover .process-flow-icon {
  background: var(--mt-brand-primary);
  color: var(--mt-text-inverse);
  transform: scale(1.08);
}

/* ── Content ── */
.process-flow-step-title {
  font-size: var(--mt-text-md);
  font-weight: var(--mt-weight-bold);
  margin-bottom: var(--mt-space-3);
  color: var(--mt-text-heading);
}

.process-flow-step-desc {
  font-size: var(--mt-text-sm);
  color: var(--mt-text-muted);
  line-height: var(--mt-leading-relaxed);
  margin-bottom: 0;
}

/* ── Navigation Arrows ── */
.pf-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--mt-border-default);
  background: var(--mt-surface-raised);
  color: var(--mt-text-heading);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--mt-shadow-md);
  pointer-events: none;
  opacity: 0;
  cursor: pointer;
  transition:
    opacity var(--mt-duration-slow) ease,
    box-shadow var(--mt-duration-fast) ease;
  z-index: var(--mt-z-base);
}

.pf-nav-left  { left: -10px; }
.pf-nav-right { right: -10px; }

.process-flow-wrapper:hover .pf-nav {
  opacity: 1;
  pointer-events: auto;
}

/* Hide left arrow at start, right arrow at end */
.process-flow-wrapper.at-start .pf-nav-left {
  opacity: 0 !important;
  pointer-events: none !important;
}

.process-flow-wrapper.at-end .pf-nav-right {
  opacity: 0 !important;
  pointer-events: none !important;
}

.pf-nav:hover {
  box-shadow: var(--mt-shadow-lg);
  background: var(--mt-brand-primary-soft);
}

.pf-nav:focus-visible {
  outline: 2px solid var(--mt-border-focus);
  outline-offset: 2px;
}

.pf-nav i {
  font-size: 14px;
}

/* ── Scroll Fade Indicators ── */
.pf-fade {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 48px;
  pointer-events: none;
  z-index: 1;
  transition: opacity var(--mt-duration-normal) ease;
}

.pf-fade-left {
  left: 0;
  background: linear-gradient(90deg, var(--mt-surface-page), transparent);
}

.pf-fade-right {
  right: 0;
  background: linear-gradient(270deg, var(--mt-surface-page), transparent);
}

/* Hide fades at boundaries */
.process-flow-wrapper.at-start .pf-fade-left {
  opacity: 0;
}

.process-flow-wrapper.at-end .pf-fade-right {
  opacity: 0;
}

/* ── RESPONSIVE ── */

/* Tablet */
@media (max-width: 991px) {
  .process-flow-title {
    font-size: 2rem;
  }

  .process-flow-step.has-connector::after {
    display: none;
  }
}

/* Mobile */
@media (max-width: 767px) {
  .process-flow-section {
    padding: var(--mt-section-py-sm) 0;
  }

  .process-flow-header {
    margin-bottom: var(--mt-space-8);
  }

  .process-flow-title {
    font-size: 1.7rem;
  }

  /* Switch to vertical timeline layout */
  .process-flow-scroll {
    overflow-x: visible;
    scroll-snap-type: none;
    cursor: default;
  }

  .process-flow-steps {
    display: flex;
    flex-direction: column;
    gap: var(--mt-space-5);
    padding: 0 var(--mt-space-4);
  }

  .process-flow-step {
    text-align: left;
    padding: 28px 24px 24px;
    display: flex;
    flex-direction: row;
    gap: var(--mt-space-4);
    align-items: flex-start;
    scroll-snap-align: none;
  }

  .process-flow-step:hover {
    transform: none;
  }

  .process-flow-step.has-connector::after {
    display: none;
  }

  /* Step number repositioned */
  .pf-step-number {
    position: static;
    flex-shrink: 0;
    margin-top: 2px;
  }

  .process-flow-icon {
    width: 52px;
    height: 52px;
    font-size: 1.2rem;
    margin: 0;
    flex-shrink: 0;
  }

  /* Content wrapper */
  .process-flow-step .process-flow-step-title,
  .process-flow-step .process-flow-step-desc {
    text-align: left;
  }

  /* Hide nav arrows on mobile */
  .pf-nav {
    display: none;
  }

  /* Hide fade indicators on mobile */
  .pf-fade {
    display: none;
  }
}

/* Small mobile */
@media (max-width: 575px) {
  .process-flow-title {
    font-size: 1.5rem;
  }

  .process-flow-subtitle {
    font-size: var(--mt-text-sm);
  }

  .process-flow-step {
    padding: 22px 18px 20px;
    gap: var(--mt-space-3);
  }

  .process-flow-icon {
    width: 44px;
    height: 44px;
    font-size: 1.1rem;
  }

  .pf-step-number {
    width: 24px;
    height: 24px;
    font-size: 0.6rem;
  }
}