/* ============================================
   PRILOSA - CSS STYLESHEET
   Institutional Knowledge Portal Design
   ============================================ */

/* CSS Variables - Color System */
:root {
  --color-primary: #2C3E50;
  --color-secondary: #ECF0F1;
  --color-neutral-soft: #BDC3C7;
  --color-neutral-dark: #34495E;
  --color-accent-orange: #F39C12;
  --color-accent-green: #27AE60;
  --color-text-primary: #2C3E50;
  --color-text-secondary: #34495E;
  --color-text-light: #7F8C8D;
  --color-white: #FFFFFF;
  --color-border: #BDC3C7;
  
  /* Spacing Scale */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 80px;
  --spacing-xxl: 120px;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-serif: 'Georgia', 'Garamond', serif;
  
  /* Border Radius */
  --radius: 4px;
  
  /* Transitions */
  --transition-smooth: all 0.3s ease-out;
}

/* ============================================
   RESET & GLOBAL STYLES
   ============================================ */

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-secondary);
  color: var(--color-text-primary);
  line-height: 1.6;
  letter-spacing: 0.3px;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
  letter-spacing: -1px;
}

h2 {
  font-size: 2.2rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 1.5rem;
  color: var(--color-text-primary);
}

h4 {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
  line-height: 1.7;
  font-size: 1.05rem;
}

a {
  color: var(--color-accent-orange);
  text-decoration: none;
  transition: var(--transition-smooth);
  border-bottom: 1px solid transparent;
}

a:hover {
  color: var(--color-accent-green);
  border-bottom-color: var(--color-accent-green);
}

ul, ol {
  margin-left: 2rem;
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-xs);
  line-height: 1.8;
  color: var(--color-text-primary);
}

/* ============================================
   LAYOUT - CONTAINER & GRID
   ============================================ */

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  width: 100%;
}

.container-narrow {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: 1fr 1fr;
}

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

.grid-cols-2-image-text {
  grid-template-columns: 1fr 1.2fr;
  align-items: center;
}

.grid-cols-text-image {
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-center {
  align-items: center;
  justify-content: center;
}

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

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

header {
  position: sticky;
  top: 0;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-sm) 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--color-white);
}

.logo a {
  color: var(--color-white);
}

.logo a:hover {
  color: var(--color-accent-orange);
}

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

nav a {
  color: var(--color-white);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  transition: var(--transition-smooth);
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}

nav a:hover,
nav a.active {
  color: var(--color-accent-orange);
  border-bottom-color: var(--color-accent-orange);
}

/* ============================================
   HERO / BANNER SECTIONS
   ============================================ */

.hero {
  background: linear-gradient(135deg, rgba(44, 62, 80, 0.9) 0%, rgba(52, 73, 94, 0.85) 100%),
              url('/images/hero-joints.jpg') center/cover;
  color: var(--color-white);
  padding: var(--spacing-xxl) var(--spacing-sm);
  text-align: center;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.hero h1 {
  color: var(--color-white);
  font-size: 3.5rem;
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.hero p {
  color: var(--color-secondary);
  font-size: 1.3rem;
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

/* ============================================
   SECTIONS & BLOCKS
   ============================================ */

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

section.light-bg {
  background-color: var(--color-secondary);
}

section.dark-bg {
  background-color: var(--color-primary);
  color: var(--color-white);
}

section.dark-bg h2,
section.dark-bg h3 {
  color: var(--color-white);
}

section.dark-bg p {
  color: rgba(255, 255, 255, 0.95);
}

section.dark-bg a {
  color: var(--color-accent-orange);
}

/* Section Title */
.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

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

.section-title p {
  color: var(--color-text-light);
  font-size: 1.1rem;
}

/* ============================================
   CARDS & BLOCKS
   ============================================ */

.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  transition: var(--transition-smooth);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  transform: translateY(-2px);
}

.card-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.card-text {
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

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

.btn {
  display: inline-block;
  padding: 12px 32px;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
  text-align: center;
  font-family: inherit;
}

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

.btn-primary:hover {
  background-color: #E8860B;
  box-shadow: 0 4px 12px rgba(243, 156, 18, 0.3);
}

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

.btn-secondary:hover {
  background-color: #1F8B47;
  box-shadow: 0 4px 12px rgba(39, 174, 96, 0.3);
}

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

.btn-outline:hover {
  background-color: var(--color-accent-orange);
  color: var(--color-white);
}

/* ============================================
   IMAGES & MEDIA
   ============================================ */

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

.image-block {
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.image-block img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.image-block:hover img {
  transform: scale(1.02);
}

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

footer {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-xl) var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

.footer-content {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  font-size: 1.1rem;
}

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

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  margin-bottom: var(--spacing-sm);
  display: block;
  transition: var(--transition-smooth);
}

.footer-section a:hover {
  color: var(--color-accent-orange);
  border-bottom: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
}

.footer-disclaimer {
  background-color: rgba(0, 0, 0, 0.2);
  padding: var(--spacing-md);
  border-radius: var(--radius);
  margin-bottom: var(--spacing-md);
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ============================================
   FORMS
   ============================================ */

form {
  max-width: 600px;
  margin: 0 auto;
}

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

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

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition-smooth);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="date"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-accent-orange);
  box-shadow: 0 0 0 3px rgba(243, 156, 18, 0.1);
}

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

/* ============================================
   UTILITY CLASSES
   ============================================ */

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

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

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

.mb-xs { margin-bottom: var(--spacing-xs); }
.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); }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

.text-accent { color: var(--color-accent-orange); }
.text-green { color: var(--color-accent-green); }
.text-light { color: var(--color-text-light); }
.text-white { color: var(--color-white); }

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

@media (max-width: 1024px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 1.8rem; }
  
  .hero { padding: var(--spacing-lg) var(--spacing-sm); }
  .hero h1 { font-size: 2.8rem; }
  
  .grid-2, .grid-cols-2-image-text, .grid-cols-text-image {
    grid-template-columns: 1fr;
  }
  
  section { padding: var(--spacing-lg) var(--spacing-sm); }
}

@media (max-width: 768px) {
  :root {
    --spacing-lg: 32px;
    --spacing-xl: 64px;
    --spacing-xxl: 80px;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.2rem; }
  
  nav ul {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1.1rem; }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .grid-3 {
    grid-template-columns: 1fr;
  }
  
  .image-block img {
    height: 300px;
  }
}

@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }
  
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.3rem; }
  
  .container, .container-narrow {
    padding: 0 12px;
  }
  
  nav ul {
    font-size: 0.9rem;
    gap: var(--spacing-sm);
  }
  
  .hero { min-height: 350px; padding: var(--spacing-lg) var(--spacing-sm); }
  .hero h1 { font-size: 1.8rem; }
  
  section { padding: var(--spacing-lg) var(--spacing-sm); }
  
  .card { padding: var(--spacing-md); }
  
  .footer-disclaimer {
    font-size: 0.85rem;
  }
}