/* ===============================
   QUOJEL - INSTITUTIONAL KNOWLEDGE PORTAL
   Color System: #34495E (Primary), #E74C3C, #2ECC71, #F39C12 (Accents)
   =============================== */

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

:root {
  --primary-dark: #34495E;
  --accent-red: #E74C3C;
  --accent-green: #2ECC71;
  --accent-orange: #F39C12;
  --neutral-light: #ECF0F1;
  --neutral-gray: #BDC3C7;
  --neutral-dark-gray: #7F8C8D;
  --text-dark: #2C3E50;
  --text-light: #FFFFFF;
  --base-spacing: 24px;
  --max-width: 1440px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
  background-color: var(--text-light);
  color: var(--text-dark);
  line-height: 1.6;
}

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

h1 {
  font-family: 'Georgia', 'Garamond', serif;
  font-size: 48px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: calc(var(--base-spacing) * 1.5);
  color: var(--primary-dark);
}

h2 {
  font-family: 'Georgia', 'Garamond', serif;
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--base-spacing);
  color: var(--primary-dark);
  margin-top: calc(var(--base-spacing) * 2);
}

h3 {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', serif;
  font-size: 24px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: calc(var(--base-spacing) * 0.75);
  color: var(--primary-dark);
  margin-top: var(--base-spacing);
}

p {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: var(--base-spacing);
  color: var(--text-dark);
}

ul, ol {
  margin-left: calc(var(--base-spacing) * 1.5);
  margin-bottom: var(--base-spacing);
}

li {
  margin-bottom: calc(var(--base-spacing) * 0.5);
}

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

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

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

header {
  background-color: var(--primary-dark);
  color: var(--text-light);
  padding: calc(var(--base-spacing) * 0.75) 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 calc(var(--base-spacing) * 2);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent-orange);
}

nav ul {
  display: flex;
  list-style: none;
  gap: calc(var(--base-spacing) * 1.5);
  margin: 0;
}

nav a {
  color: var(--text-light);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: color 0.3s ease;
}

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

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

footer {
  background-color: var(--primary-dark);
  color: var(--neutral-light);
  padding: calc(var(--base-spacing) * 3) 0 var(--base-spacing);
  margin-top: calc(var(--base-spacing) * 4);
}

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

.footer-section h3 {
  color: var(--accent-orange);
  margin-bottom: var(--base-spacing);
  margin-top: 0;
}

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

.footer-section a {
  color: var(--neutral-light);
}

.footer-contact {
  margin-top: var(--base-spacing);
}

.footer-contact p {
  color: var(--neutral-light);
  margin-bottom: calc(var(--base-spacing) * 0.5);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--base-spacing);
  text-align: center;
  color: var(--neutral-gray);
  font-size: 14px;
}

/* ===============================
   MAIN CONTAINER
   =============================== */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 calc(var(--base-spacing) * 2);
}

main {
  min-height: calc(100vh - 300px);
}

/* ===============================
   SECTIONS & LAYOUT
   =============================== */

section {
  padding: calc(var(--base-spacing) * 3) 0;
}

.section-full-width {
  width: 100%;
  margin-left: -50vw;
  margin-right: -50vw;
  left: 50%;
  right: 50%;
  padding-left: 50vw;
  padding-right: 50vw;
}

.hero {
  background: linear-gradient(135deg, rgba(52, 73, 94, 0.85) 0%, rgba(52, 73, 94, 0.7) 100%),
              url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><rect fill="%23f5f5f5" width="1200" height="600"/></svg>');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--text-light);
  padding: calc(var(--base-spacing) * 6) 0;
  text-align: center;
}

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

.hero p {
  color: var(--neutral-light);
  font-size: 18px;
  max-width: 700px;
  margin: 0 auto var(--base-spacing);
}

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

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: calc(var(--base-spacing) * 2);
  align-items: center;
}

.two-column.reverse {
  direction: rtl;
}

.two-column.reverse > * {
  direction: ltr;
}

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

.two-column-image {
  position: relative;
}

.two-column-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

/* ===============================
   CARDS & BOXES
   =============================== */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: calc(var(--base-spacing) * 2);
  margin-top: var(--base-spacing);
}

.card {
  background: var(--text-light);
  padding: var(--base-spacing);
  border-radius: 4px;
  border: 1px solid var(--neutral-light);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

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

.card-accent-top {
  border-top: 4px solid var(--accent-orange);
}

.card-accent-top.red {
  border-top-color: var(--accent-red);
}

.card-accent-top.green {
  border-top-color: var(--accent-green);
}

/* ===============================
   BUTTONS & CTA
   =============================== */

.btn {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--accent-red);
  color: var(--text-light);
  border: none;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
  background-color: var(--neutral-dark-gray);
}

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

.btn-block {
  display: block;
  width: 100%;
  text-align: center;
}

/* ===============================
   FEATURED SECTION
   =============================== */

.featured {
  background-color: var(--neutral-light);
  padding: calc(var(--base-spacing) * 2.5);
  border-left: 6px solid var(--accent-red);
  margin: var(--base-spacing) 0;
  border-radius: 4px;
}

.featured h3 {
  margin-top: 0;
  color: var(--accent-red);
}

.featured.green {
  border-left-color: var(--accent-green);
}

.featured.green h3 {
  color: var(--accent-green);
}

.featured.orange {
  border-left-color: var(--accent-orange);
}

.featured.orange h3 {
  color: var(--accent-orange);
}

/* ===============================
   BLOG & PAGINATION
   =============================== */

.blog-list {
  display: grid;
  gap: calc(var(--base-spacing) * 2);
}

.blog-item {
  padding-bottom: var(--base-spacing);
  border-bottom: 1px solid var(--neutral-light);
}

.blog-item:last-child {
  border-bottom: none;
}

.blog-meta {
  font-size: 13px;
  color: var(--neutral-dark-gray);
  margin-bottom: calc(var(--base-spacing) * 0.5);
}

.blog-title {
  margin-bottom: calc(var(--base-spacing) * 0.75);
}

.blog-excerpt {
  margin-bottom: var(--base-spacing);
  color: var(--neutral-dark-gray);
}

.pagination {
  display: flex;
  gap: calc(var(--base-spacing) * 0.5);
  justify-content: center;
  margin-top: calc(var(--base-spacing) * 3);
}

.pagination a,
.pagination span {
  padding: 8px 12px;
  border: 1px solid var(--neutral-gray);
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.pagination a:hover {
  background-color: var(--accent-red);
  color: var(--text-light);
  border-color: var(--accent-red);
}

.pagination .active {
  background-color: var(--primary-dark);
  color: var(--text-light);
  border-color: var(--primary-dark);
}

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

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

label {
  display: block;
  margin-bottom: calc(var(--base-spacing) * 0.5);
  font-weight: 600;
  color: var(--text-dark);
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--neutral-gray);
  border-radius: 4px;
  font-family: inherit;
  font-size: 14px;
  transition: border-color 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent-red);
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

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

/* ===============================
   DISCLAIMER & LEGAL
   =============================== */

.disclaimer {
  background-color: #FFF3CD;
  border: 1px solid #FFC107;
  padding: var(--base-spacing);
  border-radius: 4px;
  margin: var(--base-spacing) 0;
}

.disclaimer h3 {
  color: #856404;
  margin-top: 0;
}

.disclaimer p {
  color: #856404;
  margin-bottom: 0;
}

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

.mt-1 { margin-top: calc(var(--base-spacing) * 0.5); }
.mt-2 { margin-top: var(--base-spacing); }
.mt-3 { margin-top: calc(var(--base-spacing) * 1.5); }
.mt-4 { margin-top: calc(var(--base-spacing) * 2); }
.mt-5 { margin-top: calc(var(--base-spacing) * 3); }

.mb-1 { margin-bottom: calc(var(--base-spacing) * 0.5); }
.mb-2 { margin-bottom: var(--base-spacing); }
.mb-3 { margin-bottom: calc(var(--base-spacing) * 1.5); }
.mb-4 { margin-bottom: calc(var(--base-spacing) * 2); }
.mb-5 { margin-bottom: calc(var(--base-spacing) * 3); }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--neutral-dark-gray); }
.text-accent { color: var(--accent-red); }

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

@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: var(--base-spacing);
  }

  nav ul {
    flex-direction: column;
    gap: var(--base-spacing);
    text-align: center;
  }

  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 28px;
  }

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

  .two-column.reverse {
    direction: ltr;
  }

  .two-column-text {
    padding-right: 0;
  }

  .container {
    padding: 0 calc(var(--base-spacing) * 1);
  }

  section {
    padding: calc(var(--base-spacing) * 2) 0;
  }

  .hero {
    padding: calc(var(--base-spacing) * 3) 0;
  }

  .footer-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 22px;
  }

  h3 {
    font-size: 18px;
  }

  p {
    font-size: 15px;
  }

  nav a {
    font-size: 12px;
  }

  .btn {
    padding: 10px 20px;
    font-size: 12px;
  }
}