/* 
 * FSV SP Z O O - Premium Design System 
 * Vibrant, modern, with glassmorphism and smooth animations
 */

:root {
  /* Vibrant Color Palette */
  --color-primary: #6366f1; /* Indigo */
  --color-primary-hover: #4f46e5;
  --color-secondary: #0ea5e9; /* Sky Blue */
  --color-accent: #f43f5e; /* Rose */
  --color-dark: #0f172a; /* Slate 900 */
  --color-dark-muted: #1e293b; /* Slate 800 */
  --color-light: #f8fafc; /* Slate 50 */
  --color-text-main: #334155; /* Slate 700 */
  --color-text-light: #94a3b8; /* Slate 400 */
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  --gradient-dark: linear-gradient(135deg, #0f172a, #1e293b);
  
  /* Typography */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  
  /* Shadows & Glassmorphism */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.4);
  
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: 1px solid rgba(255, 255, 255, 0.3);
  --glass-blur: blur(12px);
  
  /* Layout */
  --nav-height: 80px;
  --container-max-width: 1200px;
  --section-padding: 5rem 0;
  
  /* Radii */
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--color-light);
  color: var(--color-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.2;
  margin-bottom: 1rem;
}

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

a:hover {
  color: var(--color-primary-hover);
}

ul {
  list-style: none;
}

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

/* =========================================================================
   UTILITIES
   ========================================================================= */
.container {
  width: 90%;
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.section {
  padding: var(--section-padding);
}

.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }
.mb-4 { margin-bottom: 4rem; }
.mt-2 { margin-top: 2rem; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-family: var(--font-heading);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  z-index: 1;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  color: white;
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

/* Button Hover Ripple Effect */
.btn::after {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(255, 255, 255, 0.2);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-normal);
  z-index: -1;
  border-radius: var(--radius-xl);
}
.btn:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: white;
}

/* Glassmorphism Cards */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* =========================================================================
   COMPONENTS
   ========================================================================= */

/* Header / Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  height: 70px;
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 90%;
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--color-primary);
}

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

.nav-links a {
  color: var(--color-text-main);
  font-weight: 500;
  font-size: 1.05rem;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-fast);
}

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

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
}

.mobile-menu-btn {
  display: none;
  font-size: 1.5rem;
  color: var(--color-dark);
  cursor: pointer;
  background: none;
  border: none;
}

/* Footer */
.site-footer {
  background: var(--color-dark);
  color: white;
  padding: 4rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h3 {
  color: white;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

.footer-col h3::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
}

.footer-col p {
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: white;
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: var(--color-text-light);
  font-size: 0.9rem;
}

/* =========================================================================
   PAGES SPECIFIC RESPONSIVE
   ========================================================================= */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transition: left var(--transition-normal);
  }

  .nav-links.active {
    left: 0;
  }

  .nav-links a {
    font-size: 1.5rem;
  }

  .mobile-menu-btn {
    display: block;
  }
}