/*
 * Sidney Freidin Inc. - 2024+ Modern Design System
 * Inspired by Tailwind CSS and current design trends
 */

/* Import Inter font for modern typography */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* 2024+ Design System Variables */
:root {
  /* Professional Color Palette */
  --primary-navy: #1e293b;
  --primary-navy-light: #334155;
  --primary-navy-dark: #0f172a;
  --accent-gold: #f59e0b;
  --accent-gold-light: #fbbf24;
  --accent-gold-dark: #d97706;
  
  /* Trust & Stability Colors */
  --success-green: #059669;
  --success-green-light: #10b981;
  --info-blue: #0ea5e9;
  --info-blue-light: #38bdf8;
  --neutral-gray: #64748b;
  --neutral-gray-light: #94a3b8;
  
  /* Modern Background System */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #e2e8f0;
  --bg-accent: #f1f5f9;
  
  /* Text Colors */
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  /* Modern Typography Scale */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  
  /* Professional Spacing System */
  --space-px: 1px;
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  
  /* Modern Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;
  --radius-default: 0.5rem;   /* 8px */
  --radius-md: 0.75rem;       /* 12px */
  --radius-lg: 1rem;          /* 16px */
  --radius-xl: 1.5rem;        /* 24px */
  --radius-2xl: 2rem;         /* 32px */
  --radius-full: 9999px;
  
  /* Professional Shadow System */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-default: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Modern Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-default: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

/* Modern Typography System */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--space-4);
  color: var(--text-secondary);
  line-height: 1.7;
}

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

a:hover {
  color: var(--accent-gold);
}

/* Modern Container System */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-8);
  }
}

/* Professional Header */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--bg-tertiary);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.95);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.logo {
  max-width: 280px;
  height: auto;
}

/* Modern Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-item {
  position: relative;
}

.nav-link {
  font-weight: 600;
  color: var(--primary-navy);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  transition: all var(--transition-default);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  font-size: var(--font-size-base);
}

.nav-link:hover {
  color: var(--text-inverse);
  background-color: var(--primary-navy-light);
  transform: translateY(-1px);
  font-weight: 700;
}

.nav-link.active {
  color: var(--text-inverse);
  background-color: var(--primary-navy);
  font-weight: 700;
  box-shadow: var(--shadow-md);
}

/* Mobile Navigation */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-default);
  transition: background-color var(--transition-fast);
}

.mobile-menu-btn:hover {
  background-color: var(--bg-secondary);
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background-color: var(--primary-navy);
  border-radius: var(--radius-full);
  transition: all var(--transition-default);
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }
  
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary-navy);
    border: 1px solid var(--primary-navy-light);
    border-radius: var(--radius-lg);
    margin: var(--space-4);
    padding: var(--space-6);
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
    box-shadow: var(--shadow-xl);
  }
  
  .nav.show {
    display: flex;
  }
  
  .nav-link {
    padding: var(--space-3) var(--space-4);
    justify-content: flex-start;
    color: var(--text-inverse) !important;
    font-weight: 600;
  }
  
  .nav-link:hover {
    background-color: var(--primary-navy-light) !important;
    color: var(--text-inverse) !important;
  }
  
  .nav-link.active {
    background-color: var(--accent-gold) !important;
    color: var(--primary-navy) !important;
    font-weight: 700;
  }
}

/* Modern Hero Section */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-light) 50%, var(--accent-gold) 100%);
  color: var(--text-inverse);
  padding: var(--space-20) 0;
  overflow: hidden;
  margin-bottom: var(--space-16);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 25% 25%, rgba(255, 255, 255, 0.1) 0%, transparent 70%),
    radial-gradient(circle at 75% 75%, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--space-6);
  color: var(--text-inverse);
}

.hero p {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-8);
  color: rgba(255, 255, 255, 0.9);
}

/* Modern Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 700;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-default);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-light) 100%);
  color: var(--text-inverse);
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  background: linear-gradient(135deg, var(--primary-navy-light) 0%, var(--primary-navy) 100%);
  color: var(--text-inverse);
}

.btn-secondary {
  background: var(--text-inverse);
  color: var(--primary-navy);
  border: 3px solid var(--text-inverse);
  box-shadow: var(--shadow-lg);
  font-weight: 700;
}

.btn-secondary:hover {
  background: var(--primary-navy);
  color: var(--text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-navy);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-dark) 100%);
  color: var(--primary-navy);
  box-shadow: var(--shadow-lg);
  border: 2px solid var(--accent-gold);
  font-weight: 700;
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  background: linear-gradient(135deg, var(--accent-gold-dark) 0%, #b45309 100%);
  color: var(--text-inverse);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-xl);
}

.btn-lg.btn-secondary:hover {
  background: var(--primary-navy);
  color: var(--text-inverse);
  border-color: var(--primary-navy);
}

/* Modern Grid System */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }

.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

@media (max-width: 768px) {
  .grid-cols-2,
  .grid-cols-3 {
    grid-template-columns: 1fr;
  }
}

/* Modern Card System */
.card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-default);
  border: 1px solid rgba(226, 232, 240, 0.8);
  transition: all var(--transition-default);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
}

.card-header {
  margin-bottom: var(--space-6);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--primary-navy);
  margin-bottom: var(--space-2);
  /* Override for dark backgrounds */
}

/* Card titles on dark backgrounds (service cards on home page) */
.service-card .card-title {
  color: var(--text-inverse);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

/* Card titles on light backgrounds */
.container > * .card-title {
  color: var(--primary-navy);
  text-shadow: none;
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
}

/* Professional Service Cards */
.service-card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-default);
  border: 1px solid var(--bg-tertiary);
  transition: all var(--transition-default);
  position: relative;
  overflow: hidden;
}

/* Service card h3 elements - default for light backgrounds */
.service-card h3 {
  color: var(--primary-inverse);
  font-weight: 800;
  text-shadow: none;
}

/* Service card h3 on dark hero sections */
.hero .service-card h3,
main .grid .service-card h3 {
  color: var(--text-inverse);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
  font-weight: 800;
}

.container > section .service-card h3,
.container > div .service-card h3 {
  color: var(--primary-inverse) !important;
  text-shadow: none !important;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-gold) 0%, var(--accent-gold-light) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-default);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-2xl);
  border-color: var(--accent-gold);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-light) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  font-size: var(--font-size-2xl);
}

/* Modern Tab System */
.tabs {
  margin-bottom: var(--space-8);
}

.tab-nav {
  display: flex;
  gap: var(--space-2);
  background: var(--bg-secondary);
  padding: var(--space-2);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-8);
}

.tab-button {
  flex: 1;
  padding: var(--space-4) var(--space-6);
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-size-lg);
  color: var(--text-inverse);
  cursor: pointer;
  transition: all var(--transition-default);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.tab-button:hover {
  background: rgba(255, 255, 255, 0.2);
  color: var(--text-inverse);
  font-weight: 700;
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-1px);
}

.tab-button.active {
  background: var(--text-inverse);
  color: var(--primary-navy);
  font-weight: 700;
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
  border-color: var(--text-inverse);
  text-shadow: none;
}

.tab-content {
  display: none;
  scroll-margin-top: 120px; /* Account for fixed header */
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}

/* Service Images */
.service-image {
  width: 100%;
  height: auto;
  max-height: 300px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-md);
}

/* Mobile responsive tabs */
@media (max-width: 768px) {
  .tab-nav {
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-4);
  }
  
  .tab-button {
    flex: none;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  
  .service-image {
    max-height: 200px;
  }
}

@media (max-width: 480px) {
  .tab-button {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
  }
  
  .service-image {
    max-height: 150px;
  }
}

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

/* Modern Footer */
.footer {
  background: var(--primary-navy);
  color: var(--text-inverse);
  padding: var(--space-16) 0 var(--space-8) 0;
  margin-top: var(--space-24);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-section h3 {
  color: var(--accent-gold);
  margin-bottom: var(--space-4);
}

.footer-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
  margin: var(--space-12) 0;
  flex-wrap: wrap;
}

.footer-logo {
  opacity: 0.8;
  transition: opacity var(--transition-fast);
  height: 50px;
  width: auto;
}

.footer-logo:hover {
  opacity: 1;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--primary-navy-light);
  color: rgba(255, 255, 255, 0.8);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }

/* Accessibility Enhancements */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus States */
*:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
  border-radius: var(--radius-default);
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .btn-primary {
    background: #000000;
    color: #ffffff;
    border: 2px solid #ffffff;
  }
  
  .card {
    border: 2px solid var(--text-primary);
  }
}