@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

:root {
  /* Premium Colors */
  --c-bg: #ffffff;
  --c-bg-alt: #f8fafc;
  --c-text-main: #0f172a; /* Slate 900 for solid contrast */
  --c-text-muted: #334155; /* Slate 700 for better readability */
  --c-border: #e2e8f0; /* Slate 200 */

  /* Accents based on prompt */
  --c-blue-light: #38bdf8;
  --c-blue-main: #2563eb;
  --c-blue-dark: #0f172a;
  --c-violet: #8b5cf6;

  /* Premium Gradients */
  --gradient-primary: linear-gradient(135deg, var(--c-blue-main) 0%, var(--c-violet) 100%);
  --gradient-text: linear-gradient(to right, var(--c-text-main), var(--c-blue-dark));
  
  /* Layout */
  --nav-height: 80px;
  --container-max: 1200px;
  
  /* Shadows - Premium */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 20px 40px -10px rgba(0, 0, 0, 0.03);
  --shadow-hover: 0 20px 40px -5px rgba(37, 99, 235, 0.1), 0 10px 20px -5px rgba(139, 92, 246, 0.05);

  /* Glass/Blur */
  --glass-bg: rgba(255, 255, 255, 0.85);
  
  /* Transitions */
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
}

/* Reset & Basics */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--c-text-main);
  background-color: var(--c-bg);
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--c-text-main);
}

h1 { font-size: clamp(3rem, 6vw, 5.5rem); letter-spacing: -0.04em; }
h2 { font-size: clamp(2.2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 2.5vw, 2rem); }

p {
  color: var(--c-text-muted);
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Container & Layout */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

.section-padding { padding: 8rem 0; }
.pt-0 { padding-top: 0; }
.text-center { text-align: center; }

/* Effects & Utilities */
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

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

/* Premium Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2.5rem;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  border-radius: 9999px;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--c-text-main);
  color: var(--c-bg);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--gradient-primary);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.4);
  color: var(--c-bg);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--c-border);
  color: var(--c-text-main);
}

.btn-outline:hover {
  border-color: var(--c-blue-main);
  color: var(--c-blue-main);
  background: var(--c-bg-alt);
}

/* Navbar - Ultra Clean */
.navbar {
  position: fixed;
  top: 0; left: 0; width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: var(--transition-smooth);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--c-text-main);
}

.logo img { height: 32px; }

.nav-menu {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--c-text-muted);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--c-text-main);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0; width: 0; height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-smooth);
  border-radius: 2px;
}

.nav-link.active::after, .nav-link:hover::after { width: 100%; }

.mobile-menu-btn {
  display: none;
  background: none; border: none; cursor: pointer;
  flex-direction: column; gap: 6px;
}

.mobile-menu-btn span {
  display: block; width: 24px; height: 2px;
  background-color: var(--c-text-main);
  transition: var(--transition-fast);
  border-radius: 2px;
}

/* Cards - Premium Bento/Linear Style */
.premium-card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 24px;
  padding: 3rem;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.premium-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 4px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition-smooth);
}

.premium-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.premium-card:hover::before { opacity: 1; }

/* Subtitle Tag */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: 99px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--c-blue-main);
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Footer - Clean */
.footer {
  background: var(--c-bg-alt);
  border-top: 1px solid var(--c-border);
  padding: 5rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-col h3 {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: var(--c-text-main);
}

.footer-links {
  display: flex; flex-direction: column; gap: 1rem;
}

.footer-links a {
  color: var(--c-text-muted);
  font-size: 1rem;
}

.footer-links a:hover {
  color: var(--c-blue-main);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--c-border);
  color: var(--c-text-muted);
  font-size: 0.9rem;
}

/* Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Mobile */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed; top: var(--nav-height); left: -100%;
    width: 100%; height: calc(100vh - var(--nav-height));
    background: var(--c-bg);
    flex-direction: column; justify-content: center; align-items: center;
    transition: var(--transition-smooth);
    border-top: 1px solid var(--c-border);
  }
  .nav-menu.active { left: 0; }
  .mobile-menu-btn { display: flex; }
  .mobile-menu-btn.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
  .mobile-menu-btn.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
  
  .footer-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}