/* Layout & Structure */

/* ===== CONTAINERS ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  width: 100%;
}

.container-sm {
  max-width: 768px;
}

.container-md {
  max-width: 960px;
}

.container-lg {
  max-width: 1400px;
}

.container-fluid {
  max-width: 100%;
  padding: 0 var(--space-lg);
}

/* ===== SECTIONS ===== */
section {
  position: relative;
  width: 100%;
}

.section-padding {
  padding: var(--space-4xl) 0;
}

.section-padding-lg {
  padding: 6rem 0;
}

.section-padding-xl {
  padding: 8rem 0;
}

/* Full-width sections */
.full-width-section {
  width: 100%;
  margin-left: 0;
  margin-right: 0;
  box-sizing: border-box;
}

/* ===== GRIDS ===== */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

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

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* Benefits Grid */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

/* Faculty Grid */
.faculty-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 380px));
  gap: 40px;
  justify-content: center;
}

/* Timeline Grid */
.timeline-grid {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== FLEXBOX UTILITIES ===== */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-start {
  justify-content: flex-start;
}

.gap-sm {
  gap: var(--space-sm);
}
.gap-md {
  gap: var(--space-md);
}
.gap-lg {
  gap: var(--space-lg);
}
.gap-xl {
  gap: var(--space-xl);
}

/* ===== TEXT ALIGNMENT ===== */
.text-left {
  text-align: left;
}
.text-center {
  text-align: center;
}
.text-right {
  text-align: right;
}

/* ===== SPACING UTILITIES ===== */
.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.mt-0 {
  margin-top: 0;
}
.mt-sm {
  margin-top: var(--space-sm);
}
.mt-md {
  margin-top: var(--space-md);
}
.mt-lg {
  margin-top: var(--space-lg);
}
.mt-xl {
  margin-top: var(--space-xl);
}
.mt-2xl {
  margin-top: var(--space-2xl);
}

.mb-0 {
  margin-bottom: 0;
}
.mb-sm {
  margin-bottom: var(--space-sm);
}
.mb-md {
  margin-bottom: var(--space-md);
}
.mb-lg {
  margin-bottom: var(--space-lg);
}
.mb-xl {
  margin-bottom: var(--space-xl);
}
.mb-2xl {
  margin-bottom: var(--space-2xl);
}

.my-sm {
  margin-top: var(--space-sm);
  margin-bottom: var(--space-sm);
}
.my-md {
  margin-top: var(--space-md);
  margin-bottom: var(--space-md);
}
.my-lg {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.pt-0 {
  padding-top: 0;
}
.pt-sm {
  padding-top: var(--space-sm);
}
.pt-md {
  padding-top: var(--space-md);
}
.pt-lg {
  padding-top: var(--space-lg);
}
.pt-xl {
  padding-top: var(--space-xl);
}

.pb-0 {
  padding-bottom: 0;
}
.pb-sm {
  padding-bottom: var(--space-sm);
}
.pb-md {
  padding-bottom: var(--space-md);
}
.pb-lg {
  padding-bottom: var(--space-lg);
}
.pb-xl {
  padding-bottom: var(--space-xl);
}

.py-sm {
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
}
.py-md {
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
}
.py-lg {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
}
.py-xl {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}
.py-2xl {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}
.py-3xl {
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}
.py-4xl {
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-4xl);
}
.py-5xl {
  padding-top: 15rem;
  padding-bottom: 15rem;
}

/* ===== RESPONSIVE BREAKPOINTS ===== */
@media (max-width: 1200px) {
  .container-lg {
    max-width: 1140px;
  }

  .faculty-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 350px));
  }

  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 1024px) {
  .container {
    padding: 0 var(--space-lg);
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .section-padding {
    padding: var(--space-3xl) 0;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .faculty-grid,
  .benefits-grid {
    grid-template-columns: 1fr;
  }

  .section-padding {
    padding: var(--space-2xl) 0;
  }

  .py-5xl {
    padding-top: 8rem;
    padding-bottom: 8rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-sm);
  }

  .section-padding {
    padding: var(--space-xl) 0;
  }
}

/* ===== SUPPORT CONTINUUM LAYOUT ===== */

.support-continuum-section {
  background: var(--white);
  position: relative;
}

.support-continuum-grid {
  display: flex;
  gap: var(--space-4xl);
  align-items: start;
  margin-top: var(--space-4xl);
  position: relative;
  z-index: 5;
}

/* Sticky positioning for timeline nav */
.support-timeline-nav {
  flex: 0 0 400px; /* Fixed width, don't grow or shrink */
  position: sticky;
  top: 120px;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
  overflow-x: visible;
  /* Hide scrollbar but keep functionality */
  scrollbar-width: none;
  -ms-overflow-style: none;
  z-index: 10;
}

/* Allow panels to grow and fill remaining space */
.support-panels-container {
  flex: 1 1 auto;
  position: relative;
  height: 100%;
  min-height: 480vh; /* 5 phases × ~96vh for smoother sticky progression */
}

/* Hide panels by default (when section is out of view) */
.support-panels-container .support-panel {
  opacity: 0 !important;
  pointer-events: none !important;
}

/* Show active panels when section is visible */
.support-panels-container.panels-visible .support-panel.active {
  opacity: 1 !important;
  pointer-events: auto !important;
}

.support-timeline-nav::-webkit-scrollbar {
  display: none;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .support-continuum-grid {
    flex-direction: column; /* Stack vertically below 1024px */
    gap: var(--space-xl);
    margin-top: var(--space-xl); /* Reduced top margin on mobile */
  }

  /* Remove sticky positioning below 1024px */
  .support-timeline-nav {
    flex: 1 1 auto; /* Full width */
    position: relative !important; /* Force relative, override JS sticky */
    top: 0 !important;
    left: auto !important;
    width: 100% !important;
    max-height: none;
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--gray-200);
    margin-bottom: var(--space-lg);
    padding-left: 0; /* Remove left padding for tabs */
    overflow: visible; /* Allow tabs to scroll */
  }

  /* Convert timeline to horizontal tabs */
  .timeline-items {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap; /* Prevent wrapping */
    gap: var(--space-sm);
    overflow-x: auto;
    overflow-y: hidden;
    padding: var(--space-xs) var(--space-sm); /* Reduced padding for mobile */
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
    width: 100%;
  }

  /* Enhanced scrollbar styling for better visibility */
  .timeline-items::-webkit-scrollbar {
    height: 6px;
  }

  .timeline-items::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 3px;
  }

  .timeline-items::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 3px;
  }

  .timeline-items::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
  }

  /* Panels also full-width */
  .support-panels-container {
    flex: 1 1 auto;
    min-height: auto; /* Remove tall min-height on mobile */
  }

  /* Hide progress line and track below 1024px */
  .timeline-progress,
  .timeline-track {
    display: none;
  }

  /* Show all panels in normal flow (no fixed positioning) */
  .support-panels-container .support-panel {
    position: relative !important;
    opacity: 1 !important;
    pointer-events: auto !important;
    width: 100%;
    min-height: 280px;
    margin-bottom: var(--space-lg);
    top: auto !important;
    right: auto !important;
    height: auto !important;
  }

  .support-panel.active {
    display: block;
  }

  .support-panel:not(.active) {
    display: none; /* Hide inactive panels */
  }
}

@media (max-width: 768px) {
  .support-continuum-grid {
    gap: var(--space-lg);
    margin-top: var(--space-lg);
  }

  .support-timeline-nav {
    padding-bottom: var(--space-md);
    margin-bottom: var(--space-md);
  }

  .timeline-items {
    gap: 8px;
    padding: 8px 12px;
  }

  .support-panels-container .support-panel {
    min-height: 250px;
    margin-bottom: var(--space-md);
  }
}

@media (max-width: 480px) {
  .support-continuum-grid {
    gap: var(--space-md);
    margin-top: var(--space-md);
  }

  .support-timeline-nav {
    padding-bottom: var(--space-sm);
    margin-bottom: var(--space-sm);
  }

  .timeline-items {
    gap: 6px;
    padding: 6px 10px;
  }

  .support-panels-container .support-panel {
    min-height: 200px;
    margin-bottom: var(--space-sm);
  }
}

@media (max-width: 480px) {
  .support-continuum-grid {
    gap: var(--space-lg);
  }

  .support-timeline-nav {
    padding-left: 30px;
  }

  .timeline-bullet {
    left: -22px;
  }

  .timeline-item.active .timeline-bullet {
    left: -24px;
  }

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

  .timeline-item.active .timeline-title {
    font-size: var(--text-xl);
  }

  .support-panel {
    min-height: 250px;
  }
}