/* ===== DESIGN TOKENS ===== */
:root {
  --purple-900: #1a0a2e;
  --purple-800: #2d1455;
  --purple-700: #4E2587;
  --purple-600: #6b35b8;
  --purple-400: #9b59e8;
  --purple-300: #b97aff;
  --purple-100: #f0e8ff;
  --tcu-purple: #4D1979;
  --tcu-frog:   #A3C1AD;
  --accent:     #8B2FC9;
  --gold:       #C9A84C;
  --white:      #ffffff;
  --off-white:  #f8f6fc;
  --text-dark:  #1a1a2e;
  --text-mid:   #4a4568;
  --text-light: #8a85a0;
  --card-bg:    #ffffff;
  --border:     rgba(78, 37, 135, 0.12);
  --shadow-sm:  0 2px 8px rgba(78, 37, 135, 0.08);
  --shadow-md:  0 8px 30px rgba(78, 37, 135, 0.15);
  --shadow-lg:  0 20px 60px rgba(78, 37, 135, 0.2);
  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  24px;
  --radius-pill:50px;
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--off-white);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== NOISE TEXTURE OVERLAY ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
}

/* ===== NAVBAR ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.navbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}
.nav-brand-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--tcu-purple);
  letter-spacing: -0.3px;
}
.nav-brand-sub {
  font-size: 0.7rem;
  color: var(--text-light);
  font-weight: 400;
  display: block;
  margin-top: -2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-mid);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-pill);
  transition: background 0.2s, color 0.2s;
}
.nav-links a:hover {
  background: var(--purple-100);
  color: var(--tcu-purple);
}
.nav-links a.nav-cta {
  background: linear-gradient(135deg, var(--tcu-purple), var(--accent));
  color: #fff;
  font-weight: 600;
  padding: 0.45rem 1.1rem;
}
.nav-links a.nav-cta:hover { opacity: 0.9; }
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--tcu-purple);
}
.hamburger svg { width: 24px; height: 24px; }

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(150deg, var(--purple-900) 0%, var(--tcu-purple) 40%, var(--accent) 100%);
}
.hero-bg-circles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero-bg-circles span {
  position: absolute;
  border-radius: 50%;
  opacity: 0.08;
  background: radial-gradient(circle, #fff 0%, transparent 70%);
}
.hero-bg-circles span:nth-child(1) { width: 700px; height: 700px; top: -200px; right: -200px; }
.hero-bg-circles span:nth-child(2) { width: 400px; height: 400px; bottom: -100px; left: 10%; animation: float 8s ease-in-out infinite; }
.hero-bg-circles span:nth-child(3) { width: 200px; height: 200px; top: 30%; left: 60%; opacity: 0.05; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1.5rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
}
.hero-badge span {
  width: 6px; height: 6px;
  background: var(--gold);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 1.25rem;
}
.hero-title .accent { color: var(--purple-300); }
.hero-subtitle {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 520px;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.8rem 1.75rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
  cursor: pointer;
  border: none;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: #fff;
  color: var(--tcu-purple);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}
.btn-primary:hover { box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.2); }

/* Hero stats */
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.stat-card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  backdrop-filter: blur(12px);
  text-align: center;
  transition: transform 0.3s, background 0.3s;
}
.stat-card:hover { transform: translateY(-4px); background: rgba(255, 255, 255, 0.15); }
.stat-label-feat { font-size: 0.85rem; color: rgba(255, 255, 255, 0.85); font-weight: 600; margin-top: 0.35rem; }
.stat-icon { font-size: 1.6rem; margin-bottom: 0.25rem; display: block; }

/* ===== SECTION LAYOUT ===== */
.section { padding: 5rem 2rem; }
.section-inner { max-width: 1100px; margin: 0 auto; }
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -1px;
  margin-bottom: 1rem;
  line-height: 1.2;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-mid);
  max-width: 650px;
  line-height: 1.75;
  margin-bottom: 3rem;
}
.section-head { margin-bottom: 3rem; }

/* ===== ABOUT SECTION ===== */
.about-section { background: var(--off-white); }
.about-text p {
  font-size: 1.05rem;
  color: var(--text-mid);
  line-height: 1.85;
  margin-bottom: 1.25rem;
}
.about-text p:last-child { margin-bottom: 0; }
.tech-tags { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.75rem; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--purple-100);
  color: var(--tcu-purple);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(78, 37, 135, 0.15);
}

/* ===== FEATURES ===== */
.features-section { background: #fff; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.feature-card {
  background: var(--off-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--purple-100) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--purple-400); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, var(--tcu-purple), var(--accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
  position: relative;
  flex-shrink: 0;
}
.feature-title { font-size: 1.05rem; font-weight: 700; color: var(--text-dark); margin-bottom: 0.6rem; position: relative; }
.feature-desc { font-size: 0.9rem; color: var(--text-mid); line-height: 1.65; position: relative; }

/* ===== TEAM SECTION ===== */
.team-section { background: var(--off-white); }
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}
.team-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem 1.75rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}
.team-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--tcu-purple), var(--purple-400));
}
.team-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
.team-avatar-wrap { position: relative; display: inline-block; margin-bottom: 1.25rem; }
.team-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--purple-100);
  margin: 0 auto;
  display: block;
}
.team-avatar-initials {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--tcu-purple), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  margin: 0 auto;
  border: 3px solid var(--purple-100);
}
.team-name { font-size: 1.1rem; font-weight: 700; color: var(--text-dark); margin-bottom: 0.35rem; }
.team-role { font-size: 0.82rem; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 1rem; }
.team-focus { font-size: 0.85rem; color: var(--text-mid); margin-bottom: 1.25rem; line-height: 1.5; }
.team-social { display: flex; justify-content: center; gap: 0.6rem; }
.social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--purple-100);
  color: var(--tcu-purple);
  text-decoration: none;
  transition: background 0.2s, color 0.2s, transform 0.2s;
}
.social-btn:hover { background: var(--tcu-purple); color: #fff; transform: scale(1.1); }
.social-btn svg { width: 16px; height: 16px; fill: currentColor; }

/* ===== DOCS SECTION ===== */
.docs-section { background: #fff; }
.docs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}
.doc-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--off-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.doc-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--tcu-purple); }
.doc-icon {
  width: 40px; height: 40px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--tcu-purple), var(--accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}
.doc-info { flex: 1; }
.doc-num { font-size: 0.7rem; font-weight: 700; color: var(--text-light); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 0.25rem; }
.doc-name { font-size: 0.92rem; font-weight: 600; color: var(--text-dark); line-height: 1.3; }
.doc-arrow { align-self: center; color: var(--text-light); font-size: 1rem; flex-shrink: 0; transition: transform 0.2s, color 0.2s; }
.doc-card:hover .doc-arrow { transform: translateX(3px); color: var(--tcu-purple); }

/* ===== FOOTER ===== */
footer {
  background: var(--purple-900);
  color: rgba(255, 255, 255, 0.65);
  padding: 2rem 2rem;
  text-align: center;
}
footer a { color: var(--purple-300); text-decoration: none; }
footer a:hover { text-decoration: underline; }
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}
.footer-brand { font-weight: 700; color: #fff; font-size: 1rem; }
.footer-divider {
  width: 40px; height: 2px;
  background: linear-gradient(90deg, var(--purple-600), var(--accent));
  border-radius: 2px;
  margin: 0.25rem auto;
}

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.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; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .hero-content { grid-template-columns: 1fr; gap: 3rem; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .features-grid, .team-grid { grid-template-columns: 1fr; }
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: #fff;
    padding: 1rem 2rem;
    gap: 0.25rem;
    box-shadow: var(--shadow-md);
    border-top: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .hamburger { display: block; }
  .navbar-inner { position: relative; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}