/*
 * Netresearch Brand Styles
 * Complete CSS template following brand guidelines
 */

/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */
:root {
  /* Brand Colors */
  --color-primary: #2F99A4;
  --color-primary-rgb: 47, 153, 164;
  --color-primary-dark: #257880;
  --color-accent: #FF4D00;
  --color-accent-rgb: 255, 77, 0;
  --color-accent-dark: #CC3D00;

  /* Neutral Colors */
  --color-text-primary: #585961;
  --color-text-secondary: #8A8B93;
  --color-background: #FFFFFF;
  --color-background-alt: #F5F5F5;
  --color-border: #CCCDCC;
  --color-border-light: #E5E5E5;

  /* Typography */
  --font-headline: 'Raleway', sans-serif;
  --font-body: 'Open Sans', sans-serif;

  /* Font Sizes */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 28px;
  --font-size-4xl: 36px;
  --font-size-5xl: 48px;
  --font-size-6xl: 56px;

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 96px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.16);
}

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

html {
  scroll-behavior: smooth;
}

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

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
}

.lead {
  font-size: var(--font-size-xl);
  font-weight: 400;
  line-height: 1.6;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: all 0.3s ease;
}

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

/* ============================================
   LAYOUT
   ============================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-4xl) 0;
}

.section-alt {
  background-color: var(--color-background-alt);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  text-align: center;
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xxl);
}

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.three-column {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-background);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-md) 0;
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.navbar-logo {
  height: 48px;
}

.navbar-menu {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.navbar-link {
  font-family: var(--font-headline);
  font-size: var(--font-size-base);
  font-weight: 400;
  color: var(--color-text-primary);
  padding: var(--spacing-xs) var(--spacing-md);
  transition: all 0.3s ease;
}

.navbar-link:hover,
.navbar-link.active {
  color: var(--color-primary);
  font-weight: 600;
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
}

.navbar-toggle span {
  display: block;
  width: 24px;
  height: 3px;
  background: var(--color-primary);
  transition: all 0.3s ease;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 600px;
  padding: var(--spacing-4xl) var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-background);
  text-align: center;
}

.hero-content {
  max-width: 800px;
  z-index: 1;
}

.hero-title {
  color: var(--color-background);
  margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  line-height: 1.6;
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
}

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

/* ============================================
   BUTTONS
   ============================================ */
.btn-primary,
.btn-secondary,
.btn-outline {
  display: inline-block;
  font-family: var(--font-headline);
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1;
  text-align: center;
  text-decoration: none;
  padding: 12px 32px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(47, 153, 164, 0.3);
}

.btn-secondary {
  background-color: var(--color-accent);
  color: var(--color-background);
}

.btn-secondary:hover {
  background-color: var(--color-accent-dark);
  box-shadow: 0 4px 12px rgba(255, 77, 0, 0.3);
}

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

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

.btn-large {
  padding: 16px 48px;
  font-size: var(--font-size-lg);
}

.btn-small {
  padding: 8px 24px;
  font-size: var(--font-size-sm);
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--color-background);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.3s ease;
  height: 100%;
}

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

.card-image {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.card-content {
  padding: var(--spacing-lg);
}

.card-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.card-text {
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

.card-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
  background-color: var(--color-background-alt);
}

.card-meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ============================================
   LINKS
   ============================================ */
.link-standalone {
  font-family: var(--font-headline);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
}

.link-standalone::after {
  content: '→';
  transition: transform 0.3s ease;
}

.link-standalone:hover::after {
  transform: translateX(4px);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.form-input,
.form-textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-background);
  transition: all 0.3s ease;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(47, 153, 164, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-secondary);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background-color: var(--color-text-primary);
  color: var(--color-background);
  padding: var(--spacing-4xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-background);
  margin-bottom: var(--spacing-md);
}

.footer-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-section li {
  margin-bottom: var(--spacing-sm);
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-size-sm);
  margin: 0;
}

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

/* Tablet (768px and below) */
@media (max-width: 1024px) {
  .three-column {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  /* Typography */
  h1 { font-size: var(--font-size-4xl); }
  h2 { font-size: var(--font-size-3xl); }
  h3 { font-size: var(--font-size-2xl); }

  /* Layout */
  .two-column,
  .three-column {
    grid-template-columns: 1fr;
  }

  /* Hero */
  .hero {
    min-height: 400px;
    padding: var(--spacing-xxl) var(--spacing-lg);
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-lg);
  }

  .hero-cta {
    flex-direction: column;
  }

  /* Navigation */
  .navbar-toggle {
    display: flex;
  }

  .navbar-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-background);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .navbar-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  /* Sections */
  .section {
    padding: var(--spacing-xxl) 0;
  }
}

/* Mobile (600px and below) */
@media (max-width: 600px) {
  h1 { font-size: var(--font-size-3xl); }
  h2 { font-size: var(--font-size-2xl); }

  .hero {
    min-height: 300px;
  }

  .btn-large {
    padding: 12px 32px;
    font-size: var(--font-size-base);
  }
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center {
  text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }