/* ===== DESIGN TOKENS ===== */
:root {
  /* Colors */
  --bg-primary:    #ffffff;
  --bg-secondary:  #f9f7ff;
  --bg-card:       #f4f1fd;
  --bg-card-hover: #ede9fa;
  --border:        #ddd6f8;
  --border-muted:  #ece8fc;

  --text-primary:  #1e1a3c;
  --text-secondary:#6b5f8a;
  --text-muted:    #9d8fc0;

  --accent:        #7c3aed;
  --accent-hover:  #6d28d9;
  --accent-soft:   rgba(124, 58, 237, 0.1);

  --success:       #4ade80;
  --warning:       #f59e0b;
  --neutral:       #6b7280;

  /* Typography */
  --font-main:     'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --max-width:     1100px;
  --nav-height:    64px;

  /* Borders */
  --radius-sm:     6px;
  --radius-md:     12px;
  --radius-lg:     16px;

  /* Shadows */
  --shadow-card:   0 1px 3px rgba(124,58,237,0.08), 0 0 0 1px var(--border);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

/* ===== LAYOUT ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
  padding-top: calc(96px + var(--nav-height));
}

/* ===== TYPOGRAPHY ===== */
.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: block;
  text-align: center;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  text-align: center;
  line-height: 1.1;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--accent);
  color: white;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s;
  cursor: pointer;
  border: none;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: transparent;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}
.btn-secondary:hover { background: var(--bg-card); border-color: var(--text-muted); }

/* ===== CARDS ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: background 0.2s, border-color 0.2s;
}
.card:hover { background: var(--bg-card-hover); border-color: #c4b5f8; }

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-completed { background: rgba(74,222,128,0.15); color: var(--success); }
.badge-upcoming  { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-pending   { background: rgba(107,114,128,0.15); color: var(--neutral); }
.badge-soon      { background: rgba(107,114,128,0.1);  color: var(--neutral); font-size: 0.7rem; }

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 100;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-muted);
}
.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.navbar-brand {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  gap: 6px;
}
.brand-bold  { color: var(--text-primary); }
.brand-light { color: var(--text-secondary); font-weight: 400; }

.navbar-links {
  display: flex;
  list-style: none;
  gap: 8px;
}
.nav-link {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.nav-link:hover   { color: var(--text-primary); }
.nav-link.active  { color: var(--accent); font-weight: 600; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

@media (max-width: 768px) {
  .nav-hamburger { display: flex; }
  .navbar-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: rgba(255,255,255,0.98);
    flex-direction: column;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-muted);
    gap: 4px;
  }
  .navbar-links.open { display: flex; }
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(124,58,237,0.07) 0%, transparent 60%),
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
  padding-top: var(--nav-height);
}
.hero-content { max-width: 780px; }

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.accent-text { color: var(--accent); }

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== ABSTRACT SECTION ===== */
.abstract-section {
  padding: 80px 0;
  border-top: 1px solid var(--border-muted);
  border-bottom: 1px solid var(--border-muted);
}
.abstract-inner {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 64px;
  align-items: start;
}
.abstract-eyebrow {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.abstract-heading {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
}
.abstract-right p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.abstract-right p:last-child { margin-bottom: 0; }
.abstract-placeholder {
  font-size: 0.82rem !important;
  color: var(--text-muted) !important;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
}

@media (max-width: 768px) {
  .abstract-inner { grid-template-columns: 1fr; gap: 24px; }
}

/* ===== STATS SECTION ===== */
.stats-section {
  padding: 64px 0;
  border-top: 1px solid var(--border-muted);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}
.stat-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
}
.stat-box-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 6px;
}
.stat-box-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ===== ACCORDION ===== */
.accordion { display: flex; flex-direction: column; gap: 12px; max-width: 860px; margin: 0 auto; }

.accordion-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }

.accordion-header {
  width: 100%; display: flex; align-items: center; gap: 12px;
  padding: 20px 24px; background: none; border: none;
  color: var(--text-primary); font-size: 1rem; font-weight: 600;
  cursor: pointer; text-align: left;
  transition: background 0.2s;
}
.accordion-header:hover { background: var(--bg-card-hover); }

.accordion-icon  { font-size: 1.1rem; flex-shrink: 0; }
.accordion-label { flex: 1; }
.accordion-chevron { color: var(--text-muted); font-size: 1.2rem; transition: transform 0.2s; }
.accordion-item.open .accordion-chevron { transform: rotate(90deg); }

.accordion-body {
  padding: 0 24px; max-height: 0; overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7;
}
.accordion-body ul { list-style: none; margin-top: 12px; display: flex; flex-direction: column; gap: 6px; }
.accordion-item.open .accordion-body { padding: 0 24px 24px; max-height: 600px; }

/* ===== MILESTONES ===== */
.milestone-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; max-width: 700px; margin: 0 auto 48px;
}
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 28px 20px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.stat-icon { font-size: 1.4rem; }
.stat-icon.completed { color: var(--success); }
.stat-icon.upcoming  { color: var(--warning); }
.stat-icon.pending   { color: var(--neutral); }
.stat-number { font-size: 2rem; font-weight: 700; }
.stat-label  { font-size: 0.85rem; color: var(--text-secondary); }

.milestone-list  { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 8px; }
.milestone-item  { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
.milestone-header {
  width: 100%; display: flex; align-items: center; gap: 12px;
  padding: 18px 24px; background: none; border: none;
  color: var(--text-primary); font-size: 0.95rem; cursor: pointer;
}
.milestone-title   { flex: 1; text-align: left; font-weight: 500; }
.milestone-chevron { color: var(--text-muted); transition: transform 0.2s; }
.milestone-item.open .milestone-chevron { transform: rotate(90deg); }
.milestone-body {
  padding: 0 24px; max-height: 0; overflow: hidden;
  transition: max-height 0.3s, padding 0.3s;
  color: var(--text-secondary); font-size: 0.9rem;
}
.milestone-item.open .milestone-body { padding: 0 24px 24px; max-height: 400px; }
.milestone-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.milestone-date, .milestone-marks { font-size: 0.8rem; color: var(--text-muted); }
.milestone-body h3 { color: var(--text-primary); margin-bottom: 8px; }
.milestone-body ul { list-style: none; margin-top: 8px; }
.milestone-body li { padding: 3px 0; }

/* ===== DOCUMENTS ===== */
.resource-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 16px; max-width: 860px; margin: 0 auto 64px;
}
.resource-card { display: flex; flex-direction: column; gap: 10px; cursor: pointer; }
.resource-card-top { display: flex; justify-content: space-between; align-items: center; }
.resource-icon { font-size: 1.4rem; padding: 8px; background: var(--accent-soft); border-radius: var(--radius-sm); }
.resource-ext-icon { color: var(--text-muted); }
.resource-card h3 { font-size: 1rem; font-weight: 700; }
.resource-card p  { font-size: 0.85rem; color: var(--text-secondary); flex: 1; }
.resource-url     { font-size: 0.75rem; color: var(--text-muted); }

.doc-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 8px; }
.doc-row  {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
}
.doc-pending { opacity: 0.45; }
.doc-icon  { font-size: 1rem; flex-shrink: 0; }
.doc-name  { flex: 1; font-size: 0.9rem; }
.btn-pdf   {
  padding: 6px 14px; background: var(--bg-secondary);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 0.8rem; font-weight: 600; white-space: nowrap;
  color: var(--text-primary); transition: background 0.2s;
}
.btn-pdf:hover { background: var(--bg-card-hover); }

@media (max-width: 640px) {
  .resource-grid { grid-template-columns: 1fr; }
}

/* ===== ABOUT ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}
.team-card { text-align: center; padding: 32px 20px; }
.team-photo-wrap {
  width: 88px; height: 88px; border-radius: 50%;
  overflow: hidden; margin: 0 auto 16px;
  border: 2px solid var(--border);
}
.team-photo { width: 100%; height: 100%; object-fit: cover; }
.team-name  { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.team-role  { font-size: 0.8rem; color: var(--accent); font-weight: 500; display: block; margin-bottom: 10px; }
.team-bio   { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 14px; }
.team-email { font-size: 0.8rem; color: var(--text-muted); text-decoration: underline; }
.team-email:hover { color: var(--text-secondary); }

/* ===== SUPERVISORS ===== */
.supervisors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  max-width: 680px;
  margin: 0 auto 0;
}
.supervisor-card {
  text-align: center;
  padding: 36px 28px;
  border-top: 3px solid var(--accent);
}
.supervisor-photo-wrap {
  width: 100px; height: 100px; border-radius: 50%;
  overflow: hidden; margin: 0 auto 16px;
  border: 3px solid var(--accent);
}
.supervisor-badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 10px;
}
.co-supervisor-badge {
  background: rgba(109, 40, 217, 0.08);
  color: var(--accent-hover);
}

/* ===== CONTACT ===== */
.contact-info p { margin-bottom: 8px; font-size: 0.9rem; color: var(--text-secondary); }
.contact-info a { color: var(--accent); }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-group label { font-size: 0.85rem; font-weight: 500; }
.form-input {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 14px;
  color: var(--text-primary); font-size: 0.9rem;
  font-family: var(--font-main); transition: border-color 0.2s;
  width: 100%; resize: vertical;
}
.form-input:focus { outline: none; border-color: var(--accent); }

/* ===== LUCIDE ICONS ===== */
.lucide {
  width: 18px;
  height: 18px;
  stroke-width: 1.75;
  flex-shrink: 0;
  vertical-align: middle;
}
.accordion-icon .lucide { width: 20px; height: 20px; color: var(--accent); }
.stat-icon .lucide       { width: 22px; height: 22px; }
.stat-icon.completed .lucide { color: var(--success); }
.stat-icon.upcoming  .lucide { color: var(--warning); }
.stat-icon.pending   .lucide { color: var(--neutral); }
.hero-pill .lucide    { width: 16px; height: 16px; color: var(--accent); }
.doc-icon .lucide     { width: 18px; height: 18px; color: var(--text-muted); }
.resource-ext-icon .lucide { width: 16px; height: 16px; }
.btn-pdf .lucide      { width: 14px; height: 14px; }
.milestone-date .lucide { width: 14px; height: 14px; color: var(--text-muted); }

/* ===== FOOTER ===== */
.site-footer {
  border-top: 1px solid var(--border-muted);
  padding: 40px 0;
  margin-top: 80px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-brand {
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  gap: 6px;
}
.footer-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
}
.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }
@media (max-width: 600px) {
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

/* ===== HERO WORDMARK ===== */
.hero-wordmark {
  position: absolute;
  bottom: -2%;
  left: 50%;
  transform: translateX(-50%);
  font-size: clamp(96px, 18vw, 220px);
  font-weight: 800;
  letter-spacing: -0.04em;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(124, 58, 237, 0.18);
  opacity: 0.9;
  z-index: 0;
}
.hero-content {
  position: relative;
  z-index: 1;
}

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== ENHANCED CARDS ===== */
.card {
  transition: background 0.25s, border-color 0.25s,
              transform 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(124, 58, 237, 0.13), 0 0 0 1px #c4b5f8;
}

/* ===== BUTTON GLOW ===== */
.btn-primary {
  transition: background 0.2s, box-shadow 0.2s, transform 0.15s;
}
.btn-primary:hover {
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.18), 0 4px 16px rgba(124, 58, 237, 0.25);
  transform: translateY(-1px);
}
.btn-secondary {
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
}
.btn-secondary:hover { transform: translateY(-1px); }

/* ===== HERO ORB ===== */
.hero {
  position: relative;
  overflow: hidden;
}
.hero-orb {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(ellipse at center, rgba(124,58,237,0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: orb-pulse 6s ease-in-out infinite;
}
@keyframes orb-pulse {
  0%, 100% { opacity: 0.7; transform: translateX(-50%) scale(1);   }
  50%       { opacity: 1;   transform: translateX(-50%) scale(1.1); }
}

/* ===== GRADIENT ACCENT TEXT ===== */
.accent-text {
  background: linear-gradient(135deg, var(--accent) 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== STAT BOX HOVER ===== */
.stat-box {
  transition: background 0.25s, border-color 0.25s,
              transform 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}
.stat-box:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(124,58,237,0.12);
  border-color: #c4b5f8;
}

/* ===== TEAM PHOTO ZOOM ===== */
.team-photo-wrap, .supervisor-photo-wrap {
  overflow: hidden;
}
.team-photo {
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.team-card:hover .team-photo,
.supervisor-card:hover .team-photo {
  transform: scale(1.08);
}

/* ===== NAV SCROLL SHADOW ===== */
.navbar.scrolled {
  background: rgba(255,255,255,0.97);
  box-shadow: 0 1px 20px rgba(124,58,237,0.08);
}