/* ============================================
   PIJAREL - Institutional Knowledge Portal
   Design System CSS
   ============================================ */

/* Root Variables */
:root {
  --primary: #1F3A66;
  --secondary: #A3B8C1;
  --tertiary: #E0D8CE;
  --accent: #6C8B7A;
  --neutral-white: #FFFFFF;
  --text-dark: #333333;
  --text-light: #F0F0F0;
  --bg-light: #F8F8F8;

  /* Spacing Grid (8px base) */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 80px;
  --spacing-xxl: 120px;

  /* Border Radius */
  --radius-sm: 2px;
  --radius-md: 4px;

  /* Transitions */
  --transition: 0.3s ease-in-out;
}

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

@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600;700&family=Merriweather:wght@400;700&display=swap');

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Merriweather', serif;
  color: var(--text-dark);
  background-color: var(--neutral-white);
  line-height: 1.6;
  margin: 0;
  padding: 0;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Open Sans', sans-serif;
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
}

h1 {
  font-size: 3.5rem;
  letter-spacing: -1px;
  margin-bottom: var(--spacing-md);
}

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

h3 {
  font-family: 'Merriweather', serif;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

p {
  font-size: 1.125rem;
  line-height: 1.7;
  margin: 0 0 var(--spacing-md) 0;
}

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

a:hover {
  color: var(--accent);
  text-decoration: underline;
}

ul, ol {
  font-size: 1.125rem;
  line-height: 1.8;
  margin: var(--spacing-md) 0;
  padding-left: 2rem;
}

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

/* ============================================
   LAYOUT & STRUCTURE
   ============================================ */

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

.container-narrow {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

section:nth-child(odd) {
  background-color: var(--neutral-white);
}

section:nth-child(even) {
  background-color: var(--bg-light);
}

/* Grid System */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(var(--spacing-md) * -1);
}

.col {
  flex: 1;
  padding: 0 var(--spacing-md);
  min-width: 0;
}

.col-6 {
  flex: 0 0 50%;
  padding: 0 var(--spacing-md);
}

.col-4 {
  flex: 0 0 33.33%;
  padding: 0 var(--spacing-md);
}

.col-3 {
  flex: 0 0 25%;
  padding: 0 var(--spacing-md);
}

.col-8 {
  flex: 0 0 66.66%;
  padding: 0 var(--spacing-md);
}

.col-12 {
  flex: 0 0 100%;
  padding: 0 var(--spacing-md);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

header {
  background-color: var(--primary);
  color: var(--text-light);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: 'Open Sans', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-light);
  margin: 0;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--spacing-lg);
}

nav a {
  color: var(--text-light);
  font-family: 'Open Sans', sans-serif;
  font-size: 1rem;
  position: relative;
  text-decoration: none;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: width var(--transition);
}

nav a:hover::after {
  width: 100%;
}

nav a.active {
  color: var(--accent);
}

/* Mobile Menu Toggle (Hidden by default) */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background-color: var(--primary);
  color: var(--text-light);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xxl);
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer-section {
  flex: 1;
  min-width: 250px;
}

.footer-section h4 {
  color: var(--tertiary);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-md);
}

.footer-section a {
  color: var(--text-light);
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--spacing-md);
  font-size: 0.9rem;
}

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

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--secondary);
  color: var(--primary);
  border: none;
  border-radius: var(--radius-md);
  font-family: 'Open Sans', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn:hover {
  background-color: var(--accent);
  color: var(--text-light);
}

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

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

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

.hero {
  background-color: var(--primary);
  color: var(--text-light);
  padding: var(--spacing-xxl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -200px;
  width: 400px;
  height: 400px;
  background-color: rgba(163, 184, 193, 0.1);
  border-radius: 50%;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: var(--text-light);
  margin-bottom: var(--spacing-lg);
}

.hero p {
  color: var(--tertiary);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background-color: var(--neutral-white);
  border: 1px solid #e0e0e0;
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.card:hover {
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
  border-color: var(--accent);
}

.card h3 {
  margin-top: 0;
  color: var(--primary);
}

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

/* ============================================
   IMAGES
   ============================================ */

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

.img-cover {
  object-fit: cover;
  width: 100%;
  height: 300px;
}

.img-featured {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* ============================================
   DISCLAIMER SECTION
   ============================================ */

.disclaimer {
  background-color: var(--tertiary);
  border-left: 4px solid var(--primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-xl) 0;
  font-size: 0.95rem;
  line-height: 1.7;
}

.disclaimer strong {
  color: var(--primary);
}

/* ============================================
   FORM ELEMENTS
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-md);
}

label {
  display: block;
  font-family: 'Open Sans', sans-serif;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--primary);
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid #ddd;
  border-radius: var(--radius-md);
  font-family: 'Merriweather', serif;
  font-size: 1rem;
  box-sizing: border-box;
  transition: var(--transition);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108, 139, 122, 0.1);
}

textarea {
  resize: vertical;
  min-height: 150px;
}

/* ============================================
   UTILITIES
   ============================================ */

.text-center {
  text-align: center;
}

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

.text-accent {
  color: var(--accent);
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.pt-5 { padding-top: var(--spacing-xl); }
.pb-5 { padding-bottom: var(--spacing-xl); }

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

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  nav ul {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .col-6,
  .col-4,
  .col-3,
  .col-8 {
    flex: 0 0 100%;
  }

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

  .row {
    margin: 0 calc(var(--spacing-sm) * -1);
  }

  .col {
    padding: 0 var(--spacing-sm);
  }

  .menu-toggle {
    display: block;
  }

  header .container {
    flex-direction: column;
    gap: var(--spacing-md);
  }

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

  .hero h1 {
    font-size: 2rem;
  }

  footer .container {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  p {
    font-size: 1rem;
  }

  .container,
  .container-narrow {
    padding: 0 var(--spacing-md);
  }

  section {
    padding: var(--spacing-lg) 0;
  }

  .btn {
    display: block;
    text-align: center;
  }
}

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

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

.fade-in {
  animation: fadeIn 0.6s ease-in-out;
}

/* Scroll Animation for Sections */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-in-out, transform 0.6s ease-in-out;
}

.animate-on-scroll.in-view {
  opacity: 1;
  transform: translateY(0);
}