/* ===========================
   HOVRIL - MAIN STYLESHEET
   Structured Insight Framework
   =========================== */

:root {
  /* Primary Color Palette */
  --primary: #2C3E50;
  --secondary: #ECF0F1;
  --accent-blue: #3498DB;
  --accent-green: #2ECC71;
  --accent-orange: #E67E22;
  
  /* Neutral Tones */
  --neutral-dark: #7F8C8D;
  --neutral-light: #BDC3C7;
  --text-primary: #2C3E50;
  --text-secondary: #7F8C8D;
  --border-color: #BDC3C7;
  
  /* Spacing Scale */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 80px;
  --spacing-4xl: 96px;
  --spacing-5xl: 120px;
  
  /* Sizing */
  --max-width: 1440px;
  --content-width: 1200px;
  
  /* Typography */
  --font-serif: 'Lora', 'Merriweather', serif;
  --font-sans: 'Lato', 'Open Sans', sans-serif;
  --font-mono: 'Courier New', monospace;
  
  /* Transitions */
  --transition: 0.2s ease-in-out;
}

/* ===========================
   RESET & BASE STYLES
   =========================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: #FFFFFF;
  line-height: 1.6;
  font-size: 16px;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 3rem;
  letter-spacing: -0.5px;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2.25rem;
  margin-bottom: var(--spacing-md);
  margin-top: var(--spacing-3xl);
}

h3 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
  margin-top: var(--spacing-2xl);
}

h4 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  line-height: 1.6;
}

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

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

ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

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

code {
  font-family: var(--font-mono);
  background-color: var(--secondary);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--text-primary);
}

blockquote {
  border-left: 4px solid var(--accent-blue);
  padding-left: var(--spacing-md);
  margin-left: 0;
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  font-style: italic;
}

/* ===========================
   CONTAINER & LAYOUT
   =========================== */

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

.content-width {
  max-width: var(--content-width);
  margin: 0 auto;
}

section {
  padding: var(--spacing-5xl) 0;
}

section.full-width {
  padding: var(--spacing-5xl) 0;
}

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

header {
  background-color: var(--primary);
  color: white;
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: white;
  letter-spacing: 1px;
}

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

nav a {
  color: white;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition);
  padding-bottom: 4px;
}

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

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .menu-toggle {
    display: block;
  }
}

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

footer {
  background-color: var(--primary);
  color: white;
  padding: var(--spacing-3xl) 0;
  margin-top: var(--spacing-5xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

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

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

.footer-section a {
  color: var(--secondary);
  border-bottom-color: transparent;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-lg) 0;
  text-align: center;
  font-size: 0.9rem;
  color: var(--neutral-light);
}

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

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, rgba(44, 62, 80, 0.95) 100%);
  color: white;
  padding: var(--spacing-5xl) var(--spacing-lg);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 500px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(45deg, transparent 30%, rgba(52, 152, 219, 0.05) 30%),
    linear-gradient(-45deg, transparent 30%, rgba(46, 204, 113, 0.05) 30%);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}

.hero h1 {
  color: white;
  font-size: 3.5rem;
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
}

.hero p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--spacing-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* ===========================
   BUTTONS & INTERACTIVE
   =========================== */

.button,
button,
input[type="submit"] {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--accent-blue);
  color: white;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--transition), box-shadow var(--transition);
  text-align: center;
}

.button:hover,
button:hover,
input[type="submit"]:hover {
  background-color: #2980b9;
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.button.secondary {
  background-color: var(--neutral-light);
  color: var(--primary);
}

.button.secondary:hover {
  background-color: #95a5a6;
}

a.button {
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
}

/* ===========================
   CARDS & CONTAINERS
   =========================== */

.card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: 0 4px 16px rgba(44, 62, 80, 0.1);
  border-color: var(--accent-blue);
}

.card h3 {
  margin-top: 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin-bottom: var(--spacing-md);
  border-radius: 4px;
}

img.featured {
  width: 100%;
  height: auto;
  margin-bottom: var(--spacing-lg);
}

.image-caption {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-top: -var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

/* ===========================
   TWO-COLUMN LAYOUT
   =========================== */

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  margin-bottom: var(--spacing-5xl);
}

.two-column.reverse {
  grid-template-columns: 1fr 1fr;
}

.two-column.reverse > *:first-child {
  order: 2;
}

.two-column.reverse > *:last-child {
  order: 1;
}

.two-column-text {
  padding: var(--spacing-lg);
}

.two-column-image img {
  width: 100%;
  height: auto;
}

@media (max-width: 768px) {
  .two-column,
  .two-column.reverse {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }
  
  .two-column.reverse > * {
    order: unset;
  }
}

/* ===========================
   SECTION DIVIDERS
   =========================== */

.divider {
  height: 1px;
  background-color: var(--border-color);
  margin: var(--spacing-3xl) 0;
}

.divider-accent {
  height: 3px;
  background: linear-gradient(90deg, 
    var(--accent-blue) 0%, 
    var(--accent-green) 50%, 
    var(--accent-orange) 100%);
  margin: var(--spacing-3xl) 0;
}

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

form {
  max-width: 600px;
  margin: var(--spacing-2xl) auto;
}

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

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

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

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

/* ===========================
   HIGHLIGHTS & ACCENTS
   =========================== */

.highlight {
  background-color: rgba(52, 152, 219, 0.1);
  padding: var(--spacing-md);
  border-radius: 4px;
  border-left: 4px solid var(--accent-blue);
  margin-bottom: var(--spacing-lg);
}

.highlight-green {
  background-color: rgba(46, 204, 113, 0.1);
  border-left-color: var(--accent-green);
}

.highlight-orange {
  background-color: rgba(230, 126, 34, 0.1);
  border-left-color: var(--accent-orange);
}

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

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

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

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

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

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

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

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

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

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

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

.py-xl {
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
}

.hidden {
  display: none;
}

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

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

@media (max-width: 1024px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  section {
    padding: var(--spacing-3xl) 0;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }
  
  h1 {
    font-size: 1.75rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  section {
    padding: var(--spacing-2xl) 0;
  }
  
  .hero {
    min-height: 350px;
    padding: var(--spacing-2xl) var(--spacing-lg);
  }
  
  .hero h1 {
    font-size: 1.75rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  nav ul {
    gap: var(--spacing-md);
  }
  
  nav a {
    font-size: 0.85rem;
  }
  
  .two-column {
    gap: var(--spacing-lg);
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.5rem;
  }
  
  h2 {
    font-size: 1.25rem;
  }
  
  h3 {
    font-size: 1.1rem;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .header-content {
    padding: 0 var(--spacing-md);
  }
}

/* ===========================
   BLOG & ARTICLE STYLES
   =========================== */

.article {
  max-width: 900px;
  margin: 0 auto;
}

.article-meta {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-lg);
}

.article-content h2 {
  margin-top: var(--spacing-3xl);
}

.article-content p {
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
}

.blog-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.blog-card:hover {
  box-shadow: 0 6px 20px rgba(44, 62, 80, 0.12);
  transform: translateY(-2px);
}

.blog-card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  margin: 0;
}

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

.blog-card h3 {
  margin-top: 0;
}

.blog-card-meta {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: var(--spacing-md);
}

.blog-card p {
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
  height: 100px;
  overflow: hidden;
}

.blog-card a {
  font-weight: 600;
}

/* ===========================
   BACK TO TOP
   =========================== */

#back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: var(--accent-blue);
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition), background-color var(--transition);
  z-index: 999;
  border: none;
  font-size: 20px;
}

#back-to-top:hover {
  background-color: #2980b9;
}

#back-to-top.visible {
  opacity: 1;
}

@media (max-width: 768px) {
  #back-to-top {
    width: 40px;
    height: 40px;
    bottom: 20px;
    right: 20px;
    font-size: 16px;
  }
}