/* ==========================================================================
   MUJEEB UL HAQ QADRI (v2) - Interactive SVG Roadmap & Mobile Timeline
   ========================================================================== */

.roadmap-section {
  position: relative;
  padding-block: clamp(4rem, 8vw, 7rem);
  background-color: var(--bg-base);
  overflow: hidden;
}

.roadmap-container {
  position: relative;
  width: 100%;
  max-width: min(100%, 1180px);
  margin-inline: auto;
}

/* Desktop SVG Curve Wrapper (Overlaid behind milestone cards) */
.roadmap-svg-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  display: block;
}

.roadmap-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
  filter: drop-shadow(0 0 12px rgba(99, 102, 241, 0.2));
}

/* Background Path Track */
.path-track {
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 4;
  fill: none;
  stroke-linecap: round;
}

/* Glowing Filled Active Path */
.path-active {
  stroke: url(#pathGlowGradient);
  stroke-width: 4;
  fill: none;
  stroke-linecap: round;
  stroke-dasharray: 2000;
  stroke-dashoffset: 2000;
  transition: stroke-dashoffset 0.1s linear;
  filter: drop-shadow(0 0 8px rgba(6, 182, 212, 0.6));
}

/* Vehicle / Rocket Icon Group */
.vehicle-group {
  will-change: transform;
  transform-origin: 0 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.vehicle-glow {
  filter: drop-shadow(0 0 10px rgba(6, 182, 212, 0.9));
}

.vehicle-exhaust {
  animation: exhaustPulse 0.4s infinite alternate;
}

@keyframes exhaustPulse {
  from { opacity: 0.6; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1.2); }
}

/* Desktop Milestone Overlay Cards */
.milestones-grid {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
  position: relative;
  z-index: 2;
  padding-block: 2rem;
}

.milestone-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
  position: relative;
  opacity: 0.85;
  transform: translateY(14px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.milestone-item.active {
  opacity: 1;
  transform: translateY(0);
}

.milestone-card {
  background: linear-gradient(150deg, rgba(20, 14, 21, 0.88) 0%, rgba(10, 7, 11, 0.97) 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 3.5vw, 2.25rem);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 
    0 20px 48px -12px rgba(0, 0, 0, 0.85),
    0 8px 18px -6px rgba(0, 0, 0, 0.6),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  position: relative;
  transition: var(--transition);
}

.milestone-item.active .milestone-card {
  border-color: rgba(6, 182, 212, 0.45);
  border-top-color: rgba(6, 182, 212, 0.7);
  box-shadow: 
    0 24px 55px -10px rgba(0, 0, 0, 0.9),
    0 0 30px rgba(6, 182, 212, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.milestone-card:hover {
  transform: translateY(-4px);
  box-shadow: 
    0 28px 60px -10px rgba(0, 0, 0, 0.95),
    0 0 35px rgba(6, 182, 212, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

/* Alternating indicators facing the central spine on desktop */
.milestone-item:nth-child(odd) .milestone-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  left: auto;
  width: 4px;
  height: 100%;
  background: var(--accent-cyan);
  border-radius: 0 4px 4px 0;
}

.milestone-item:nth-child(even) .milestone-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: auto;
  width: 4px;
  height: 100%;
  background: var(--accent-cyan);
  border-radius: 4px 0 0 4px;
}

.milestone-date {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.milestone-title {
  font-size: clamp(1.2rem, 2.2vw, 1.4rem);
  margin-bottom: 0.65rem;
  color: #fff;
  line-height: 1.25;
}

.milestone-desc {
  font-size: 0.92rem;
  line-height: 1.6;
  color: #94a3b8;
  margin-bottom: 1rem;
}

.milestone-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.milestone-pill {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  color: #cbd5e1;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Reduced Motion Fallback */
@media (prefers-reduced-motion: reduce) {
  .vehicle-group {
    display: none !important;
  }
  .path-active {
    stroke-dashoffset: 0 !important;
  }
  .milestone-item {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Mobile Timeline Rail hidden on desktop */
.mobile-timeline-rail {
  display: none;
}

/* Mobile Responsive Timeline Overhaul */
@media (max-width: 768px) {
  .roadmap-svg-wrapper {
    display: none !important; /* Hide desktop SVG on mobile */
  }

  .mobile-timeline-rail {
    display: block;
    position: absolute;
    top: 0.5rem;
    bottom: 0.5rem;
    left: 1.15rem;
    width: 3px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    z-index: 1;
  }

  .mobile-timeline-fill {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: linear-gradient(180deg, var(--accent-cyan) 0%, var(--accent-primary) 50%, var(--accent-purple) 100%);
    border-radius: 4px;
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.7);
    transition: height 0.08s ease-out;
  }

  .mobile-timeline-beacon {
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    top: 0%;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #040306;
    border: 2px solid var(--accent-cyan);
    box-shadow: 0 0 14px var(--accent-cyan), 0 0 24px rgba(6, 182, 212, 0.5);
    z-index: 3;
    transition: top 0.08s ease-out;
  }

  .mobile-timeline-beacon::after {
    content: '';
    position: absolute;
    inset: 3px;
    border-radius: 50%;
    background: var(--accent-cyan);
  }

  .milestones-grid {
    gap: 1.25rem;
    padding-left: 2.75rem;
    margin-left: 0;
    padding-block: 0.5rem;
  }

  .milestone-item, 
  .milestone-item:nth-child(even) {
    display: block;
    direction: ltr;
    position: relative;
    opacity: 0.45;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }

  /* Glowing Milestone Dot on Mobile Timeline Rail */
  .milestone-item::before {
    content: '';
    position: absolute;
    top: 1.25rem;
    left: -2rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    border: 2px solid #040306;
    z-index: 2;
    transition: background-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
  }

  .milestone-item.active,
  .milestone-item:nth-child(even).active {
    opacity: 1;
    transform: translateY(0);
  }

  .milestone-item.active::before {
    background-color: var(--accent-cyan);
    box-shadow: 0 0 12px var(--accent-cyan);
    transform: scale(1.15);
  }

  .milestone-card {
    padding: 1.15rem 1rem;
    border-radius: var(--radius-md);
  }

  .milestone-card::before,
  .milestone-item:nth-child(odd) .milestone-card::before,
  .milestone-item:nth-child(even) .milestone-card::before {
    left: 0 !important;
    right: auto !important;
    border-radius: 4px 0 0 4px !important;
  }

  .milestone-item.active .milestone-card {
    border-color: rgba(6, 182, 212, 0.45);
    box-shadow: 0 8px 24px rgba(6, 182, 212, 0.15);
  }

  .milestone-title {
    font-size: 1.1rem;
    margin-bottom: 0.35rem;
  }

  .milestone-desc {
    font-size: 0.85rem;
    line-height: 1.5;
    margin-bottom: 0.65rem;
  }

  .milestone-pills {
    gap: 0.35rem;
  }

  .milestone-pill {
    font-size: 0.72rem;
    padding: 0.2rem 0.55rem;
  }
}