/* ===================================
   IS TECH ADVISORS - GLOBAL STYLES (V2 - ENHANCED DESIGN)
   Design System & Reusable Components
   =================================== */

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

/* === CSS VARIABLES (Design Tokens) === */
:root {
  /* 1. Refined Color Palette */
  --primary-blue: #4F46E5;  /* A more modern, sophisticated blue */
  --primary-dark: #4338CA;
  --primary-light: #6D28D9;
  
  /* Neutral Colors */
  --text-primary: #111827; /* Darker, for better contrast */
  --text-secondary: #4B5563;
  --text-light: #9CA3AF;
  --background-white: #FFFFFF;
  --background-light: #F9FAFB; /* Slightly off-white for a softer feel */
  --background-gray: #F3F4F6;
  --border-color: #E5E7EB;
  
  /* Accent Colors */
  --success-green: #10B981;
  --warning-orange: #F59E0B;
  
  /* 2. Upgraded Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800; /* Added for strong headings */
  
  /* Spacing Scale (Unchanged) */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  --spacing-2xl: 6rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --container-narrow: 800px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  
  /* 3. Softer, Deeper Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-extrabold); /* Bolder headings */
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 { font-size: 3.5rem; letter-spacing: -0.025em; }
h2 { font-size: 2.5rem; letter-spacing: -0.02em; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }
p { margin-bottom: var(--spacing-sm); color: var(--text-secondary); font-size: 1.125rem; }
a { color: var(--primary-blue); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--primary-dark); }

/* === LAYOUT CONTAINERS === */
.container { max-width: var(--container-max-width); margin: 0 auto; padding: 0 var(--spacing-md); }
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 var(--spacing-md); }
.section { padding: var(--spacing-2xl) 0; }
.section-light { background-color: var(--background-light); }

/* === NAVIGATION BAR === */
.navbar {
  background-color: rgba(255, 255, 255, 0.8); /* Frosted glass effect */
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky; top: 0; z-index: 1000;
}
.navbar-container { max-width: var(--container-max-width); margin: 0 auto; padding: var(--spacing-sm) var(--spacing-md); display: flex; justify-content: space-between; align-items: center; }
.navbar-logo { font-size: 1.5rem; font-weight: var(--font-weight-bold); color: var(--text-primary); text-decoration: none; }
.navbar-logo:hover { color: var(--primary-blue); }
.navbar-menu { display: flex; list-style: none; gap: var(--spacing-lg); align-items: center; }
.navbar-link { color: var(--text-secondary); font-weight: var(--font-weight-medium); padding: var(--spacing-xs) 0; position: relative; }
.navbar-link:hover { color: var(--primary-blue); }
.navbar-link::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--primary-blue); transition: width 0.3s ease; }
.navbar-link:hover::after { width: 100%; }
.navbar-link.active { color: var(--primary-blue); }
.navbar-link.active::after { width: 100%; }
.navbar-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text-primary); }

/* === 4. ENHANCED BUTTONS === */
.btn {
  display: inline-block; padding: 0.875rem 1.75rem; font-size: 1rem;
  font-weight: var(--font-weight-semibold); text-align: center; text-decoration: none;
  border-radius: var(--border-radius); border: none; cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  font-family: var(--font-primary);
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-light) 100%);
  color: var(--background-white);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-secondary {
  background-color: var(--background-white); color: var(--primary-blue);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--background-light); border-color: var(--primary-blue); color: var(--primary-blue);
}
.btn-large { padding: 1.125rem 2.5rem; font-size: 1.125rem; }

/* === CARDS === */
.card {
  background-color: var(--background-white); border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg); box-shadow: var(--shadow-md);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--border-color);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}
.card-title { font-size: 1.5rem; margin-bottom: var(--spacing-sm); }
.card-text { color: var(--text-secondary); margin-bottom: var(--spacing-md); }

/* === HERO SECTIONS === */
.hero {
  background: var(--text-primary); /* A darker, more dramatic background */
  color: var(--background-white); padding: var(--spacing-2xl) 0; text-align: center;
}
.hero h1 { color: var(--background-white); margin-bottom: var(--spacing-md); }
.hero p { color: rgba(255, 255, 255, 0.8); font-size: 1.25rem; max-width: 800px; margin: 0 auto; }

/* === GRID SYSTEMS & FOOTER (Mostly unchanged) === */
.grid { display: grid; gap: var(--spacing-lg); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.footer { background-color: var(--text-primary); color: var(--background-white); padding: var(--spacing-xl) 0 var(--spacing-lg) 0; }
.footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.footer-section h4 { color: var(--background-white); margin-bottom: var(--spacing-sm); }
.footer-section p, .footer-section a { color: rgba(255, 255, 255, 0.8); font-size: 1rem; }
.footer-section a:hover { color: var(--background-white); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: var(--spacing-md); text-align: center; color: rgba(255, 255, 255, 0.6); }

/* === FORMS === */
.form-group { margin-bottom: var(--spacing-md); }
.form-label { display: block; margin-bottom: var(--spacing-xs); font-weight: var(--font-weight-medium); color: var(--text-primary); }
.form-input, .form-textarea, .form-input select {
  width: 100%; padding: 0.875rem; border: 1px solid var(--border-color);
  border-radius: var(--border-radius); font-size: 1rem;
  font-family: var(--font-primary); transition: border-color 0.2s ease, box-shadow 0.2s ease;
  background-color: var(--background-white);
}
.form-input:focus, .form-textarea:focus {
  outline: none; border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}
.form-textarea { resize: vertical; min-height: 150px; }

/* === UTILITY CLASSES === */
.text-center { text-align: center; }
.text-primary { color: var(--primary-blue); }
.mt-sm { margin-top: var(--spacing-sm); } .mt-md { margin-top: var(--spacing-md); } .mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); } .mb-md { margin-bottom: var(--spacing-md); } .mb-lg { margin-bottom: var(--spacing-lg); }

/* === RESPONSIVE DESIGN === */
@media (max-width: 768px) {
  h1 { font-size: 2.5rem; } h2 { font-size: 2rem; } h3 { font-size: 1.5rem; } p { font-size: 1rem; }
  .navbar-menu {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background-color: var(--background-white); flex-direction: column;
    padding: var(--spacing-md); box-shadow: var(--shadow-lg);
  }
  .navbar-menu.active { display: flex; }
  .navbar-toggle { display: block; }
  .section, .hero { padding: var(--spacing-lg) 0; }
  .btn-large { padding: 1rem 2rem; font-size: 1rem; }
}
/* === Button Styles for Dark Backgrounds === */

/* 1. The general style for a light button on a dark background */
.btn-light {
  background-color: var(--background-white);
  color: var(--primary-blue);
  font-weight: var(--font-weight-bold);
  box-shadow: var(--shadow-sm);
}

.btn-light:hover {
  background-color: var(--background-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* 2. A more specific rule to fix the button INSIDE a hero section */
.hero .btn-light {
  background-color: var(--background-white); /* Force the background to be white */
  color: var(--primary-blue); /* Force the text to be blue */
}

.hero .btn-light:hover {
  background-color: var(--background-light); /* Adjust hover background */
  color: var(--primary-dark);
}