/* style.css - Global Design System */

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

:root {
  /* Brand Colors */
  --clr-brand: #d42030;
  --clr-brand-hover: #b91b29;
  --clr-brand-light: rgba(212, 32, 48, 0.1);
  --clr-accent: #0f1d4e;

  /* Typography */
  --font-body: 'Inter', sans-serif;
  --font-heading: 'Outfit', sans-serif;

  /* Spacing */
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-xxl: 6rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --max-width: 1280px;
  --header-height: 80px;

  /* Default (Light Mode) Variables */
  --bg-primary: #ffffff;
  --bg-secondary: rgba(0, 0, 0, 0.02);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: rgba(0, 0, 0, 0.1);
  
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-shadow: 0 20px 50px rgba(0, 0, 0, 0.05);

  --header-bg: rgba(255, 255, 255, 0.85);
  --btn-text: #ffffff;
}

/* Dark Mode Variables */
html.dark {
  --bg-primary: #050505;
  --bg-secondary: rgba(255, 255, 255, 0.02);
  --text-primary: #ffffff;
  --text-secondary: #e2e8f0;
  --text-muted: #9ca3af;
  --border-color: rgba(255, 255, 255, 0.1);
  
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);

  --header-bg: rgba(5, 5, 5, 0.85);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  transition: background-color var(--transition-normal);
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

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

ul {
  list-style: none;
}

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

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Glassmorphism Utilities */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: var(--glass-shadow);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal), border var(--transition-normal);
}

.glass-panel:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

html.dark .glass-panel:hover {
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0.8rem 2rem;
  border-radius: 9999px; /* Pill shape */
  font-family: var(--font-body);
  font-weight: 600;
  text-transform: capitalize;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  position: relative;
  z-index: 1;
}

.btn-primary {
  background-color: var(--clr-brand);
  color: var(--btn-text);
  box-shadow: 0 4px 15px rgba(212, 32, 48, 0.3);
}

.btn-primary:hover {
  background-color: var(--clr-brand-hover);
  transform: scale(0.98);
  box-shadow: 0 0 20px rgba(212, 32, 48, 0.5);
  color: var(--btn-text);
}

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

.btn-outline:hover {
  background-color: var(--bg-secondary);
  border-color: var(--clr-brand);
}

/* Header & Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 100;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  height: 70px;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.logo-text span {
  color: var(--clr-brand);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 0.5rem 0;
  color: var(--text-secondary);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--clr-brand);
  transition: width var(--transition-normal);
}

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

/* Theme Switcher */
.theme-switcher {
  position: relative;
}

.theme-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-normal), background var(--transition-normal);
}

.theme-btn:hover {
  color: var(--text-primary);
  background: var(--glass-border);
}

.theme-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 150px;
  box-shadow: var(--glass-shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
}

.theme-menu.active {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.theme-menu button {
  background: none;
  border: none;
  text-align: left;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-weight: 500;
  transition: background var(--transition-fast), color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-menu button:hover {
  background: var(--glass-border);
  color: var(--text-primary);
}

.theme-menu button.active {
  color: var(--clr-brand);
}

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

/* Sections */
section {
  padding: var(--space-xxl) 0;
  position: relative;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  text-align: center;
  font-weight: 800;
}

.section-title span {
  color: var(--clr-brand);
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
  font-size: 1.1rem;
}

/* Footer */
.footer {
  background-color: var(--bg-secondary);
  padding: var(--space-xxl) 0 var(--space-lg);
  border-top: 1px solid var(--border-color);
}

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

.footer-col h4 {
  font-size: 1.2rem;
  margin-bottom: var(--space-lg);
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: var(--clr-brand);
}

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

.footer-links a {
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--clr-brand);
  padding-left: 5px;
}

.footer-contact li {
  display: flex;
  gap: 10px;
  margin-bottom: 1rem;
  color: var(--text-muted);
}

.footer-contact i {
  color: var(--clr-brand);
  margin-top: 4px;
}

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

/* Utilities */
.text-center { text-align: center; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background: var(--header-bg);
    backdrop-filter: blur(15px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: left var(--transition-normal);
  }

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

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

  .section-title {
    font-size: 2rem;
  }
}

/* Global Particle Background */
#global-particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* Mobile Optimization */
html {
  -webkit-text-size-adjust: 100%;
}
* {
  -webkit-tap-highlight-color: transparent;
}

/* Global Floating Icons */
#global-floating-icons {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.icon-float {
  position: absolute;
  font-size: clamp(2rem, 5vw, 4rem);
  color: var(--text-primary);
  opacity: 0.04;
  animation: float 8s ease-in-out infinite;
  will-change: transform;
}

@keyframes float {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-30px) rotate(15deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}