:root {
  /* Colors */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #64748b;
  
  --accent-primary: #0ea5e9;
  --accent-secondary: #38bdf8;
  --accent-gradient: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  
  --border-color: #e2e8f0;
  
  /* Typography */
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-heading: 'Outfit', 'Inter', system-ui, sans-serif;
  
  /* Utilities */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
  
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-blur: blur(12px);
  
  --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font-sans); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.center { text-align: center; }
section { padding: 6rem 0; }
.section-title { font-size: 2.5rem; font-weight: 700; margin-bottom: 1rem; }
.section-desc { font-size: 1.1rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

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

/* Navbar */
nav {
  position: fixed; top: 0; left: 0; right: 0; height: 80px; z-index: 100;
  display: flex; align-items: center; transition: var(--transition);
}
nav.scrolled {
  background: var(--glass-bg); backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border); box-shadow: var(--shadow-sm);
}
.nav-container { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.logo { font-family: var(--font-heading); font-weight: 700; font-size: 1.5rem; }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links a { font-weight: 500; color: var(--text-secondary); transition: var(--transition); }
.nav-links a:hover { color: var(--accent-primary); }
.lang-toggle {
  display: flex; align-items: center; gap: 0.5rem; padding: 0.5rem 1rem;
  border-radius: 2rem; background: var(--bg-secondary); border: 1px solid var(--border-color);
  font-weight: 600; color: var(--text-primary); transition: var(--transition);
}
.lang-toggle:hover { border-color: var(--accent-primary); color: var(--accent-primary); }

/* Hero */
.hero {
  min-height: 100vh; display: flex; align-items: center; position: relative; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(circle at 80% 20%, rgba(14, 165, 233, 0.15) 0%, transparent 40%),
              radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 40%);
  animation: pulseBg 10s ease-in-out infinite alternate;
}
.hero-container {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center;
}
.hero-greeting { font-size: 1.2rem; font-weight: 600; color: var(--accent-primary); margin-bottom: 1rem; display: block; }
.hero-title { font-size: 3.5rem; font-weight: 800; margin-bottom: 1.5rem; letter-spacing: -0.02em; min-height: 100px; }
.hero-description { font-size: 1.25rem; color: var(--text-secondary); margin-bottom: 2.5rem; }
.cta-button {
  display: inline-flex; align-items: center; gap: 0.5rem; padding: 1rem 2rem;
  border-radius: 3rem; background: var(--accent-gradient); color: white;
  font-weight: 600; font-size: 1.1rem; transition: var(--transition); box-shadow: var(--shadow-md);
}
.cta-button:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* Typing Effect */
.cursor { display: inline-block; width: 3px; height: 1em; background-color: var(--accent-primary); vertical-align: text-bottom; margin-left: 2px; animation: blink 1s step-end infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
@keyframes pulseBg { 0% { opacity: 0.7; transform: scale(1); } 100% { opacity: 1; transform: scale(1.05); } }

/* Floating Widgets */
.hero-visuals { position: relative; height: 500px; }
.widget {
  position: absolute; background: var(--glass-bg); backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border); border-radius: 1rem; padding: 1.5rem;
  box-shadow: var(--shadow-xl); min-width: 200px; animation-name: float; animation-timing-function: ease-in-out; animation-iteration-count: infinite;
}
.float-1 { top: 0%; right: 0%; animation-duration: 6s; }
.float-2 { top: 45%; left: -10%; animation-duration: 7s; animation-delay: 1s; }
.float-3 { bottom: 0%; left: 15%; animation-duration: 5s; animation-delay: 2s; }
.float-4 { top: 15%; left: 10%; animation-duration: 6.5s; animation-delay: 0.5s; }
.float-5 { bottom: 20%; right: 5%; animation-duration: 5.5s; animation-delay: 1.5s; }
.float-6 { top: 45%; right: 30%; animation-duration: 6.2s; animation-delay: 0.8s; }
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-15px); }
  100% { transform: translateY(0px); }
}
.widget-header { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; margin-bottom: 1rem; font-size: 0.9rem; color: var(--text-secondary); }
.widget-value { font-size: 2rem; font-weight: 800; font-family: var(--font-heading); color: var(--text-primary); }
.widget-subtitle { font-size: 0.8rem; color: var(--text-tertiary); }
.widget-chart { display: flex; align-items: flex-end; gap: 0.5rem; height: 60px; margin-top: 1rem; }
.bar { width: 20px; background: var(--accent-gradient); border-radius: 3px 3px 0 0; }
.widget-status { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; }
.status-dot { width: 10px; height: 10px; background: #22c55e; border-radius: 50%; box-shadow: 0 0 10px #22c55e; animation: pulseDot 2s infinite; }
@keyframes pulseDot { 0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); } 70% { box-shadow: 0 0 0 10px rgba(34, 197, 94, 0); } 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); } }

/* Grid Layouts */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; margin-top: 3rem; }

/* About */
.about { background: var(--bg-secondary); }
.about-image-wrapper { position: relative; border-radius: 1rem; overflow: hidden; box-shadow: var(--shadow-xl); }
.about-image-wrapper::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(14, 165, 233, 0.2), transparent); }
.about-image { width: 100%; display: block; aspect-ratio: 4/5; object-fit: cover; }
.about-content { display: flex; flex-direction: column; gap: 1.5rem; }

/* Cards (Services & Portfolio) */
.card { background: var(--bg-primary); padding: 2rem; border-radius: 1rem; border: 1px solid var(--border-color); box-shadow: var(--shadow-sm); transition: var(--transition); }
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--accent-primary); }
.icon-wrapper { padding: 1rem; background: var(--bg-tertiary); border-radius: 0.75rem; color: var(--accent-primary); display: inline-block; margin-bottom: 1rem; }
.card-title { font-size: 1.25rem; font-weight: 600; margin-bottom: 0.5rem; }
.card-desc { color: var(--text-secondary); font-size: 0.95rem; }

.portfolio { background: var(--bg-secondary); }
.project-image { width: 100%; aspect-ratio: 16/9; background: var(--bg-tertiary); display: flex; align-items: center; justify-content: center; color: var(--text-tertiary); border-radius: 0.5rem; margin-bottom: 1rem; }

/* Contact */
.contact { background: var(--bg-primary); text-align: center; }
.contact-links { display: flex; justify-content: center; gap: 2rem; flex-wrap: wrap; margin-top: 3rem; }
.contact-link { display: flex; align-items: center; gap: 0.75rem; padding: 1rem 2rem; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 3rem; font-weight: 600; transition: var(--transition); box-shadow: var(--shadow-sm); }
.contact-link:hover { border-color: var(--accent-primary); color: var(--accent-primary); transform: translateY(-3px); box-shadow: var(--shadow-md); }

/* Footer */
footer { background: var(--bg-secondary); padding: 2rem 0; text-align: center; border-top: 1px solid var(--border-color); color: var(--text-secondary); }

/* Scroll Reveal */
.reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s ease-out; }
.reveal.active { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 992px) {
  .hero-container { grid-template-columns: 1fr; text-align: center; }
  .hero-visuals { display: none; }
  .hero-description { margin: 0 auto 2.5rem; }
  .grid-2 { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}