/**
 * Insider Hub - Main Stylesheet
 * Unified Landing Page for Tech Sol & Advisory Services
 */

/* ============================================
   ROOT VARIABLES & THEME DEFINITIONS
   ============================================ */

:root {
  /* Light Mode Colors */
  --bg-primary: #f8f8f8;
  --bg-secondary: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --border-color: #e0e0e0;
  --accent-primary: #3b82f6;
  --accent-secondary: #06b6d4;
  --accent-light: #e0f2fe;
  --accent-tech: #8b5cf6;
  --accent-advisory: #ec4899;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

body.dark {
  /* Dark Mode Colors */
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --text-primary: #f0f0f0;
  --text-secondary: #b0b0b0;
  --border-color: #333333;
  --accent-primary: #3b82f6;
  --accent-secondary: #06b6d4;
  --accent-light: #1e3a8a;
  --accent-tech: #a78bfa;
  --accent-advisory: #f472b6;
}

/* ============================================
   GLOBAL STYLES
   ============================================ */

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

html {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: 'Lexend', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 {
  font-size: 3.5rem;
  font-weight: 700;
}

h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: 1.75rem;
  font-weight: 600;
}

h4 {
  font-size: 1.25rem;
  font-weight: 600;
}

p {
  font-weight: 400;
  color: var(--text-secondary);
}

strong {
  font-weight: 600;
  color: var(--text-primary);
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--spacing-2xl);
  }
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn:hover {
  transform: scale(1.05);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-secondary) 0%, var(--accent-primary) 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.5);
}

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

.btn-secondary:hover {
  background-color: var(--accent-light);
  border-color: var(--accent-primary);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--spacing-3xl) var(--spacing-md);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
}

body.dark .hero-section {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.2) 0%, transparent 70%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
}

.hero-text h1 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  font-size: clamp(2rem, 8vw, 3.5rem);
}

.hero-text .gradient-text {
  display: block;
  background: linear-gradient(135deg, var(--accent-secondary) 0%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--text-secondary);
  z-index: 2;
  animation: bounce 2s infinite;
}

.scroll-indicator svg {
  margin-top: var(--spacing-sm);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about-section {
  padding: var(--spacing-3xl) var(--spacing-md);
  background-color: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-text p {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
  color: var(--text-secondary);
}

/* ============================================
   SERVICES SECTION
   ============================================ */

.services-section {
  padding: var(--spacing-3xl) var(--spacing-md);
  background-color: var(--bg-primary);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-2xl);
}

.service-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  transition: all var(--transition-base);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  border-color: var(--accent-secondary);
  box-shadow: 0 15px 40px rgba(6, 182, 212, 0.2);
  transform: translateY(-8px);
}

.service-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.service-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  flex-shrink: 0;
}

.tech-icon {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(168, 85, 247, 0.2));
  color: var(--accent-tech);
}

.advisory-icon {
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.2), rgba(244, 114, 182, 0.2));
  color: var(--accent-advisory);
}

.service-header h3 {
  margin: 0;
}

.service-description {
  margin-bottom: var(--spacing-lg);
}

.service-description p {
  font-size: 1rem;
  line-height: 1.6;
}

.service-features {
  flex: 1;
  margin-bottom: var(--spacing-lg);
}

.feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.feature:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.feature svg {
  color: var(--accent-secondary);
  flex-shrink: 0;
}

.feature span {
  color: var(--text-primary);
  font-weight: 500;
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact-section {
  padding: var(--spacing-3xl) var(--spacing-md);
  background-color: var(--bg-secondary);
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-2xl);
}

.contact-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  text-align: center;
  transition: all var(--transition-base);
}

.contact-card:hover {
  border-color: var(--accent-secondary);
  box-shadow: 0 10px 30px rgba(6, 182, 212, 0.2);
  transform: translateY(-5px);
}

.contact-card h4 {
  margin-bottom: var(--spacing-md);
}

.contact-card p {
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   BOTTOM DOCK NAVIGATION
   ============================================ */

.bottom-dock {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: all var(--transition-base);
}

.dock-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.dock-brand {
  font-weight: 700;
  font-size: 1.3rem;
  white-space: nowrap;
}

.brand-text {
  color: var(--text-primary);
}

.brand-accent {
  background: linear-gradient(135deg, var(--accent-secondary) 0%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.dock-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex: 1;
  justify-content: flex-end;
}

.dock-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: transparent;
  border: none;
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 0.95rem;
  font-weight: 500;
}

.dock-item:hover {
  background-color: var(--accent-light);
  color: var(--accent-primary);
}

.dock-item.active {
  background-color: rgba(6, 182, 212, 0.2);
  color: var(--accent-secondary);
}

.dock-item span {
  display: none;
}

@media (min-width: 768px) {
  .dock-item span {
    display: inline;
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease-out forwards;
}

.animate-slideInUp {
  animation: slideInUp 0.6s ease-out forwards;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  .hero-text h1 {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-cta-buttons .btn {
    width: 100%;
    justify-content: center;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .service-card {
    padding: var(--spacing-lg);
  }
  
  .contact-cards {
    grid-template-columns: 1fr;
  }
  
  .dock-container {
    padding: 0 var(--spacing-sm);
    gap: var(--spacing-sm);
  }
  
  .dock-brand {
    font-size: 1rem;
  }
  
  .dock-item {
    padding: var(--spacing-sm);
  }
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-secondary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}