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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #60a5fa;
  --accent: #06b6d4;
  --dark: #0f172a;
  --dark-alt: #1e293b;
  --gray-900: #111827;
  --gray-700: #374151;
  --gray-500: #6b7280;
  --gray-300: #d1d5db;
  --gray-100: #f3f4f6;
  --white: #ffffff;
  --success: #10b981;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 48px rgba(0,0,0,.12);
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--gray-700);
  line-height: 1.7;
  background: var(--white);
  overflow-x: hidden;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ==========================================
   🧭 NAVBAR
   ========================================== */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0,0,0,.06);
  transition: var(--transition);
}
#navbar.scrolled {
  background: rgba(255,255,255,.95);
  box-shadow: 0 2px 20px rgba(0,0,0,.06);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  font-size: 1.35rem; font-weight: 800; color: var(--dark);
}
.logo-icon {
  font-size: 1.6rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
#nav-links { display: flex; gap: 32px; }
#nav-links a {
  font-size: .95rem; font-weight: 500; color: var(--gray-500);
  transition: var(--transition); position: relative;
}
#nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--primary);
  transition: var(--transition);
}
#nav-links a:hover, #nav-links a.active { color: var(--primary); }
#nav-links a:hover::after, #nav-links a.active::after { width: 100%; }

/* Hamburger */
.hamburger {
  display: none; background: none; border: none; cursor: pointer;
  width: 28px; height: 20px; position: relative;
}
.hamburger span {
  display: block; width: 100%; height: 2px; background: var(--dark);
  position: absolute; left: 0; transition: var(--transition);
}
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 9px; }
.hamburger span:nth-child(3) { top: 18px; }
.hamburger.open span:nth-child(1) { top: 9px; transform: rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { top: 9px; transform: rotate(-45deg); }

/* ==========================================
   🚀 HERO
   ========================================== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  overflow: hidden; padding-top: 72px;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(37,99,235,.12) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(6,182,212,.1) 0%, transparent 50%),
    linear-gradient(180deg, var(--white) 0%, var(--gray-100) 100%);
}
.hero-content { position: relative; z-index: 1; text-align: center; }
.hero-tagline {
  font-size: .85rem; font-weight: 600; letter-spacing: 3px;
  color: var(--primary); margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 800;
  color: var(--dark); line-height: 1.15; margin-bottom: 24px;
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem); color: var(--gray-500);
  max-width: 640px; margin: 0 auto 40px;
}
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats {
  display: flex; gap: 48px; justify-content: center; flex-wrap: wrap;
  padding-top: 40px; border-top: 1px solid var(--gray-300);
}
.stat { text-align: center; }
.stat-num {
  display: block; font-size: 2.2rem; font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.stat-label { font-size: .85rem; color: var(--gray-500); font-weight: 500; }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 50px; font-weight: 600;
  font-size: .95rem; transition: var(--transition); cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--primary); color: var(--white); border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark); border-color: var(--primary-dark);
  transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,.3);
}
.btn-outline {
  background: transparent; color: var(--primary); border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary); color: var(--white);
  transform: translateY(-2px);
}
.btn-full { width: 100%; justify-content: center; }

/* ==========================================
   📐 SECTIONS
   ========================================== */
.section { padding: 100px 0; }
.bg-alt { background: var(--gray-100); }
.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem); font-weight: 800;
  color: var(--dark); margin-bottom: 16px;
}
.section-sub { font-size: 1.1rem; color: var(--gray-500); margin-bottom: 48px; }
.text-center { text-align: center; }
.accent {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

/* ─── ABOUT ─── */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.about-text p { margin-bottom: 16px; }
.about-list { margin-top: 24px; }
.about-list li {
  padding: 8px 0; font-weight: 500; color: var(--gray-700);
}
.about-visual { display: grid; gap: 20px; }
.about-card {
  background: var(--white); border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow); transition: var(--transition);
  border: 1px solid rgba(0,0,0,.04);
}
.about-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card-icon { font-size: 2rem; margin-bottom: 12px; }
.about-card h3 { font-size: 1.1rem; color: var(--dark); margin-bottom: 8px; }
.about-card p { font-size: .9rem; color: var(--gray-500); }

/* ─── SERVICES ─── */
.services-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 28px;
}
.service-card {
  background: var(--white); border-radius: var(--radius); padding: 36px;
  box-shadow: var(--shadow); transition: var(--transition);
  border: 1px solid rgba(0,0,0,.04);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.service-icon { font-size: 2.5rem; margin-bottom: 16px; }
.service-card h3 {
  font-size: 1.2rem; font-weight: 700; color: var(--dark); margin-bottom: 12px;
}
.service-card > p { font-size: .92rem; color: var(--gray-500); margin-bottom: 20px; }
.service-card ul li {
  font-size: .88rem; color: var(--gray-700); padding: 4px 0;
  padding-left: 18px; position: relative;
}
.service-card ul li::before {
  content: '▸'; position: absolute; left: 0; color: var(--primary); font-weight: 700;
}

/* ─── WHY US ─── */
.why-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 32px;
  margin-top: 48px;
}
.why-item {
  padding: 32px; border-radius: var(--radius);
  background: var(--white); border: 1px solid var(--gray-300);
  transition: var(--transition);
}
.why-item:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); }
.why-number {
  font-size: 2.5rem; font-weight: 800; color: var(--gray-300);
  margin-bottom: 12px; line-height: 1;
}
.why-item h3 { font-size: 1.15rem; color: var(--dark); margin-bottom: 8px; }
.why-item p { font-size: .92rem; color: var(--gray-500); }

/* ─── CONTACT ─── */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; margin-top: 48px;
}
.contact-item {
  display: flex; gap: 16px; padding: 20px 0;
  border-bottom: 1px solid var(--gray-300);
}
.contact-item:last-child { border-bottom: none; }
.contact-icon { font-size: 1.5rem; flex-shrink: 0; }
.contact-item h4 { font-size: 1rem; color: var(--dark); margin-bottom: 4px; }
.contact-item p { font-size: .92rem; color: var(--gray-500); }

.contact-form {
  background: var(--white); padding: 40px; border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: .85rem; font-weight: 600;
  color: var(--dark); margin-bottom: 6px;
}
.form-group input,
.form-group textarea {
  width: 100%; padding: 12px 16px; border: 2px solid var(--gray-300);
  border-radius: 8px; font-size: .95rem; font-family: inherit;
  transition: var(--transition); background: var(--gray-100);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none; border-color: var(--primary);
  background: var(--white); box-shadow: 0 0 0 4px rgba(37,99,235,.1);
}
.form-status {
  margin-top: 12px; font-size: .9rem; font-weight: 500; text-align: center;
}
.form-status.success { color: var(--success); }
.form-status.error { color: #ef4444; }

/* ==========================================
   🦶 FOOTER
   ========================================== */
footer {
  background: var(--dark); color: var(--gray-300); padding: 60px 0 0;
}
.footer-inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .logo-icon { font-size: 1.4rem; margin-right: 6px; }
.footer-brand span { font-size: 1.2rem; font-weight: 700; color: var(--white); }
.footer-brand p { margin-top: 12px; font-size: .9rem; color: var(--gray-500); }
.footer-links h4, .footer-contact h4 {
  font-size: .95rem; font-weight: 700; color: var(--white); margin-bottom: 16px;
}
.footer-links ul li { margin-bottom: 10px; }
.footer-links ul a {
  font-size: .88rem; color: var(--gray-500); transition: var(--transition);
}
.footer-links ul a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-contact p { font-size: .88rem; margin-bottom: 8px; }
.footer-bottom {
  border-top: 1px solid var(--dark-alt); text-align: center;
  padding: 24px 0; font-size: .85rem; color: var(--gray-500);
}

/* ==========================================
   🎬 ANIMATIONS
   ========================================== */
[data-aos] {
  opacity: 0; transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
[data-aos].visible { opacity: 1; transform: translateY(0); }

/* Stagger children */
.services-grid .service-card:nth-child(2),
.why-grid .why-item:nth-child(2) { transition-delay: .1s; }
.services-grid .service-card:nth-child(3),
.why-grid .why-item:nth-child(3) { transition-delay: .2s; }
.services-grid .service-card:nth-child(4),
.why-grid .why-item:nth-child(4) { transition-delay: .3s; }

/* ==========================================
   📱 RESPONSIVE
   ========================================== */
@media (max-width: 1024px) {
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hamburger { display: block; }
  #nav-links {
    position: fixed; top: 72px; left: 0; right: 0;
    background: var(--white); flex-direction: column;
    padding: 24px; gap: 20px; text-align: center;
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%); transition: var(--transition);
    z-index: 999;
  }
  #nav-links.open { transform: translateY(0); }
  .hero-stats { gap: 24px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; }
}

@media (max-width: 480px) {
  .section { padding: 60px 0; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
}

.logo-img,
.logo-svg {
  flex-shrink: 0;
  transition: transform var(--transition);
}
.logo:hover .logo-img,
.logo:hover .logo-svg {
  transform: scale(1.05);
}

:root {
  --logo-bg: #0055D4;
  --logo-text: #FFFFFF;
}

/* Example: dark mode override */
@media (prefers-color-scheme: dark) {
  :root {
    --logo-bg: #3b82f6;
    --logo-text: #ffffff;
  }
}