/* ============================================
   THREE STAGE GROUP — STYLESHEET
   ============================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #050810;
  --bg-2: #0a0f1e;
  --surface: #0f1628;
  --surface-2: #141d35;
  --border: rgba(255,255,255,0.08);
  --text: #f0f4ff;
  --text-muted: #8892a4;
  --accent-1: #6366f1;
  --accent-2: #8b5cf6;
  --accent-3: #06b6d4;
  --gradient: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-3));
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --nav-h: 72px;
  --radius: 16px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ============ SCROLLBAR ============ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--surface-2); border-radius: 99px; }

/* ============ UTILITIES ============ */
.container { max-width: 1160px; margin: 0 auto; padding: 0 32px; }

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-1);
  margin-bottom: 20px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text);
}

.section-title.centered { text-align: center; }

/* ============ REVEAL ANIMATION ============ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ BUTTONS ============ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 28px;
  border: none;
  border-radius: 99px;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 0 24px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-2px); box-shadow: 0 8px 32px rgba(99, 102, 241, 0.45); }
.btn-primary:active { transform: translateY(0); }
.btn-primary.full-width { width: 100%; justify-content: center; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  padding: 13px 28px;
  border: 1px solid var(--border);
  border-radius: 99px;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}
.btn-ghost:hover { background: var(--surface); border-color: rgba(255,255,255,0.2); }

/* ============ NAVBAR ============ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}
#navbar.scrolled {
  background: rgba(5, 8, 16, 0.85);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
}

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 15px;
  flex-shrink: 0;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: var(--gradient);
  border-radius: 10px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #fff;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin-left: auto;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 1px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-cta {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  padding: 10px 20px;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 99px;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.nav-cta:hover { background: var(--surface); border-color: rgba(99,102,241,0.4); }

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

.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 16px 32px 20px;
  background: rgba(5,8,16,0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  gap: 4px;
}
.mobile-menu.open { display: flex; }
.mobile-link { font-size: 15px; font-weight: 500; color: var(--text-muted); padding: 10px 0; border-bottom: 1px solid var(--border); transition: color var(--transition); }
.mobile-link:last-child { border-bottom: none; }
.mobile-link:hover { color: var(--text); }

/* ============ HERO ============ */
#hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: var(--nav-h);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: float 8s ease-in-out infinite;
}

.orb-1 { width: 600px; height: 600px; background: radial-gradient(circle, #6366f1, transparent 70%); top: -150px; left: -100px; animation-delay: 0s; }
.orb-2 { width: 500px; height: 500px; background: radial-gradient(circle, #8b5cf6, transparent 70%); bottom: -100px; right: -80px; animation-delay: -3s; }
.orb-3 { width: 300px; height: 300px; background: radial-gradient(circle, #06b6d4, transparent 70%); top: 40%; left: 60%; animation-delay: -5s; }
.orb-4 { width: 500px; height: 500px; background: radial-gradient(circle, #6366f1, transparent 70%); top: -100px; right: -100px; animation-delay: -2s; }
.orb-5 { width: 400px; height: 400px; background: radial-gradient(circle, #8b5cf6, transparent 70%); bottom: 0; left: -80px; animation-delay: -4s; }

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 760px;
  padding: 0 24px;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-3);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  padding: 6px 16px;
  border-radius: 99px;
  margin-bottom: 28px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 24px;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.scroll-indicator {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  opacity: 0.6;
  animation: pulse-opacity 2s ease-in-out infinite;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scroll-drop 2s ease-in-out infinite;
}

@keyframes pulse-opacity { 0%,100% { opacity: 0.4; } 50% { opacity: 0.8; } }
@keyframes scroll-drop { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform: scaleY(1); transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* Staggered reveal delays for hero */
.hero-content .reveal:nth-child(1) { transition-delay: 0.1s; }
.hero-content .reveal:nth-child(2) { transition-delay: 0.2s; }
.hero-content .reveal:nth-child(3) { transition-delay: 0.35s; }
.hero-content .reveal:nth-child(4) { transition-delay: 0.5s; }

/* ============ ABOUT ============ */
#about {
  padding: 120px 0;
  position: relative;
}

.about-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
  margin-bottom: 80px;
}

.about-feature-text { display: flex; flex-direction: column; gap: 24px; }
.about-feature-text .section-title { margin-bottom: 0; }
.about-feature-text p { color: var(--text-muted); font-size: 17px; line-height: 1.8; }

.about-feature-img {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 4/5;
  flex-shrink: 0;
}
.about-feature-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.8s ease;
  filter: brightness(0.85) saturate(0.8);
}
.about-feature-img:hover img { transform: scale(1.04); }
.about-feature-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5,8,16,0.6) 0%, transparent 50%);
}

.img-card {
  position: absolute;
  bottom: 24px;
  left: 24px;
  z-index: 2;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 12px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.img-card-num {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.img-card-label { font-size: 13px; font-weight: 500; color: rgba(255,255,255,0.75); line-height: 1.3; }

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pillar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.pillar::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient);
  opacity: 0;
  transition: opacity var(--transition);
  border-radius: var(--radius);
}

.pillar:hover { border-color: rgba(99,102,241,0.4); transform: translateY(-4px); box-shadow: 0 20px 48px rgba(0,0,0,0.3); }
.pillar:hover::before { opacity: 0.05; }

.pillar-icon {
  width: 48px; height: 48px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}
.pillar-icon svg { width: 22px; height: 22px; color: var(--accent-1); }

.pillar h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.pillar p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ============ BANNER ============ */
.banner-section {
  position: relative;
  height: 420px;
  overflow: hidden;
}

.banner-img-wrap {
  position: absolute;
  inset: 0;
}
.banner-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.4) saturate(0.6);
}
.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(5,8,16,0.7) 0%,
    rgba(99,102,241,0.15) 50%,
    rgba(5,8,16,0.7) 100%
  );
}

.banner-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 64px;
}

.banner-divider {
  width: 1px;
  height: 64px;
  background: rgba(255,255,255,0.15);
  flex-shrink: 0;
}

.banner-stat {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-label {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
}

/* ============ TEAM ============ */
#team {
  padding: 120px 0;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.team-grid {
  display: flex;
  justify-content: center;
  margin-top: 56px;
  margin-bottom: 32px;
}

.team-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 36px;
  max-width: 380px;
  width: 100%;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}
.team-card:hover { border-color: rgba(99,102,241,0.4); transform: translateY(-4px); }

.team-avatar { margin-bottom: 24px; display: flex; justify-content: center; }

.avatar-placeholder {
  width: 88px; height: 88px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 0 32px rgba(99,102,241,0.35);
}

.team-info h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 6px; }
.team-role { font-size: 13px; font-weight: 500; color: var(--accent-1); letter-spacing: 0.05em; display: block; margin-bottom: 14px; }
.team-info p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

.team-note { text-align: center; font-size: 14px; color: var(--text-muted); opacity: 0.6; }

/* ============ CONTACT ============ */
#contact {
  padding: 120px 0;
  position: relative;
  overflow: hidden;
}

.contact-bg { position: absolute; inset: 0; pointer-events: none; }

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
  position: relative;
  z-index: 1;
}

.contact-left p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  margin: 20px 0 32px;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}
.contact-detail svg { width: 18px; height: 18px; color: var(--accent-1); flex-shrink: 0; }
.contact-detail a { color: var(--text-muted); transition: color var(--transition); }
.contact-detail a:hover { color: var(--text); }

.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
}

input, textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: none;
}

input::placeholder, textarea::placeholder { color: rgba(136, 146, 164, 0.5); }
input:focus, textarea:focus { border-color: rgba(99,102,241,0.6); box-shadow: 0 0 0 3px rgba(99,102,241,0.12); }

.form-success {
  display: none;
  text-align: center;
  font-size: 14px;
  color: var(--accent-3);
  background: rgba(6, 182, 212, 0.08);
  border: 1px solid rgba(6, 182, 212, 0.2);
  padding: 14px;
  border-radius: 10px;
}
.form-success.show { display: block; }

/* ============ FOOTER ============ */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  background: var(--bg);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
}

.footer-copy { font-size: 13px; color: var(--text-muted); opacity: 0.5; }

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .about-feature { grid-template-columns: 1fr; gap: 40px; }
  .about-feature-img { aspect-ratio: 16/9; }
  .pillars { grid-template-columns: 1fr; }
  .banner-content { gap: 32px; }
  .banner-divider { height: 40px; }
  .contact-inner { grid-template-columns: 1fr; gap: 48px; }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
}

@media (max-width: 600px) {
  .container { padding: 0 20px; }
  #about, #team, #contact { padding: 80px 0; }
  .banner-section { height: auto; padding: 60px 0; }
  .banner-content { flex-direction: column; gap: 28px; }
  .banner-divider { width: 60px; height: 1px; }
  .contact-form { padding: 28px 20px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
  .hero-title { font-size: 2.6rem; }
}