/* style.css */

:root {
  --font-primary: "Helvetica Neue", Arial, sans-serif;
  --font-secondary: "Georgia", serif;
  --font-size-base: 16px;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-bold: 700;

  /* Light Theme */
  --color-background-primary-light: #f8f9fa;
  --color-background-secondary-light: #ffffff;
  --color-background-dark-section-light: #f1f3f5;
  --color-text-primary-light: #212529;
  --color-text-secondary-light: #495057;
  --color-text-muted-light: #6c757d;
  --color-accent-primary-light: #005f73;
  --color-accent-secondary-light: #0a9396;
  --color-border-light: #dee2e6;
  --color-shadow-light: rgba(0, 0, 0, 0.08);

  /* Dark Theme */
  --color-background-primary-dark: #121212;
  --color-background-secondary-dark: #1e1e1e;
  --color-background-dark-section-dark: #242424;
  --color-text-primary-dark: #e0e0e0;
  --color-text-secondary-dark: #adb5bd;
  --color-text-muted-dark: #868e96;
  --color-accent-primary-dark: #94d2bd;
  --color-accent-secondary-dark: #ee9b00;
  --color-border-dark: #343a40;
  --color-shadow-dark: rgba(0, 0, 0, 0.4);

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 32px;
  --spacing-xl: 64px;

  --border-radius-sm: 4px;
  --border-radius-md: 8px;

  --container-width-max: 1200px;
  --transition-speed-fast: 0.2s;
  --transition-speed-normal: 0.4s;

  --shadow-sm: 0 2px 4px var(--color-shadow);
  --shadow-md: 0 4px 12px var(--color-shadow);
}

/* Default to light theme variables */
:root {
  --color-background-primary: var(--color-background-primary-light);
  --color-background-secondary: var(--color-background-secondary-light);
  --color-background-dark-section: var(--color-background-dark-section-light);
  --color-text-primary: var(--color-text-primary-light);
  --color-text-secondary: var(--color-text-secondary-light);
  --color-text-muted: var(--color-text-muted-light);
  --color-accent-primary: var(--color-accent-primary-light);
  --color-accent-secondary: var(--color-accent-secondary-light);
  --color-border: var(--color-border-light);
  --color-shadow: var(--color-shadow-light);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background-primary: var(--color-background-primary-dark);
    --color-background-secondary: var(--color-background-secondary-dark);
    --color-background-dark-section: var(--color-background-dark-section-dark);
    --color-text-primary: var(--color-text-primary-dark);
    --color-text-secondary: var(--color-text-secondary-dark);
    --color-text-muted: var(--color-text-muted-dark);
    --color-accent-primary: var(--color-accent-primary-dark);
    --color-accent-secondary: var(--color-accent-secondary-dark);
    --color-border: var(--color-border-dark);
    --color-shadow: var(--color-shadow-dark);
  }
}

/* GENERAL RESETS & BASE STYLES */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-background-primary);
  color: var(--color-text-secondary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-speed-fast),
    color var(--transition-speed-fast);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-text-primary);
  font-family: var(--font-primary);
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 3rem;
}
h2 {
  font-size: 2.25rem;
}
h3 {
  font-size: 1.75rem;
}
h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-md);
  max-width: 75ch;
}

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

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

ul {
  list-style: none;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  color: inherit;
}

/* LAYOUT */
.container {
  width: 90%;
  max-width: var(--container-width-max);
  margin: 0 auto;
}

.content-section,
.content-section-dark,
.hero-section,
.cta-section {
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
}

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

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

.section-subtitle {
  text-align: center;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

.section-divider {
  border: 0;
  height: 1px;
  background-color: var(--color-border);
  width: 80%;
  max-width: 1000px;
  margin: 0 auto;
}

/* HEADER */
.main-header {
  background-color: var(--color-background-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  text-decoration: none;
}

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

.main-nav ul {
  display: flex;
  gap: var(--spacing-lg);
}

.main-nav a {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-regular);
  padding: var(--spacing-sm) 0;
  position: relative;
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent-primary);
  transition: width var(--transition-speed-fast);
}

.main-nav a:hover {
  color: var(--color-text-primary);
  text-decoration: none;
}

.main-nav a:hover::after {
  width: 100%;
}

.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 28px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.mobile-nav-toggle .bar {
  width: 28px;
  height: 3px;
  background-color: var(--color-text-primary);
  border-radius: 10px;
  transition: all 0.3s ease-in-out;
}

/* CTA BUTTON */
.cta-button {
  background-color: var(--color-accent-primary);
  color: var(--color-background-secondary);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  font-weight: var(--font-weight-bold);
  transition: background-color var(--transition-speed-fast),
    transform var(--transition-speed-fast);
  display: inline-block;
}

.cta-button:hover {
  background-color: var(--color-accent-secondary);
  color: var(--color-background-secondary);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.header-cta {
  padding: var(--spacing-xs) var(--spacing-md);
}

/* HERO SECTION */
.hero-section {
  background-color: var(--color-background-dark-section);
  text-align: center;
  display: flex;
  align-items: center;
  min-height: 60vh;
}

.hero-content h1 {
  font-size: 3.5rem;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--spacing-lg);
}

/* ARTICLES SECTION */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.article-card {
  background-color: var(--color-background-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-speed-normal),
    box-shadow var(--transition-speed-normal);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.article-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.article-content {
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-category {
  color: var(--color-accent-secondary);
  font-weight: var(--font-weight-bold);
  font-size: 0.8rem;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
}

.article-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.article-excerpt {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  flex-grow: 1;
}

/* NEWS SECTION */
.news-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.news-column h4 {
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--color-accent-primary);
  margin-bottom: var(--spacing-lg);
}

.news-list li {
  margin-bottom: var(--spacing-lg);
}

.news-list h5 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
}

.news-list p {
  font-size: 0.95rem;
  margin-bottom: var(--spacing-sm);
}

.news-meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* TABS SECTION */
.tabs-container {
  max-width: 900px;
  margin: 0 auto;
}

.tabs-nav {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-lg);
}

.tab-link {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
  font-weight: var(--font-weight-regular);
  color: var(--color-text-secondary);
  border-bottom: 3px solid transparent;
  transition: color var(--transition-speed-fast),
    border-color var(--transition-speed-fast);
}

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

.tab-link.active {
  color: var(--color-accent-primary);
  border-bottom-color: var(--color-accent-primary);
  font-weight: var(--font-weight-bold);
}

.tab-content {
  display: none;
  animation: fadeIn 0.5s ease-in-out;
}

.tab-content.active {
  display: block;
}

.tab-content h4 {
  margin-bottom: var(--spacing-md);
}

/* INTERVIEWS SECTION */
.interviews-container {
  display: grid;
  gap: var(--spacing-lg);
}

.interview-item {
  background-color: var(--color-background-secondary);
  padding: var(--spacing-lg);
  border-left: 5px solid var(--color-accent-secondary);
  border-radius: var(--border-radius-sm);
}

.interview-quote p {
  font-family: var(--font-secondary);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

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

.author-name {
  display: block;
  font-weight: var(--font-weight-bold);
}

.author-title {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* MATERIALS SECTION */
.materials-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.material-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  background-color: var(--color-background-secondary);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--color-border);
}

.material-icon svg {
  width: 32px;
  height: 32px;
  color: var(--color-accent-primary);
  flex-shrink: 0;
  margin-top: 5px;
}

.material-description h4 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.1rem;
}

.material-description p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* FAQ / ACCORDION */
.accordion {
  max-width: 800px;
  margin: 0 auto;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  overflow: hidden;
}

.accordion-item {
  border-bottom: 1px solid var(--color-border);
}

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

.accordion-header {
  width: 100%;
  background-color: var(--color-background-secondary);
  padding: var(--spacing-md);
  text-align: left;
  font-size: 1.1rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color var(--transition-speed-fast);
}

.accordion-header:hover {
  background-color: var(--color-background-dark-section);
}

.accordion-icon {
  transition: transform var(--transition-speed-fast);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out, padding 0.4s ease-out;
  background-color: var(--color-background-primary);
}

.accordion-content p {
  padding: var(--spacing-md);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 0;
}

.accordion-item.active .accordion-header {
  background-color: var(--color-background-dark-section);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-item.active .accordion-content {
  max-height: 500px;
}

.faq-more-info {
  text-align: center;
  margin-top: var(--spacing-lg);
  color: var(--color-text-muted);
}

/* CTA & NEWSLETTER SECTION */
.cta-section {
  background-color: var(--color-accent-primary);
}

.cta-section .section-title,
.cta-section .section-subtitle,
.cta-section .form-legal,
.cta-section .form-legal a {
  color: #ffffff;
}

.cta-section .section-subtitle {
  opacity: 0.9;
}

.cta-section a:hover {
  text-decoration: underline;
}

.newsletter-form {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  max-width: 600px;
  margin: var(--spacing-lg) auto 0;
}

.newsletter-form input[type="email"] {
  flex-grow: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  background-color: var(--color-background-secondary);
  color: var(--color-text-primary);
}

.newsletter-form button {
  background-color: var(--color-accent-secondary);
  color: var(--color-text-primary);
}

@media (prefers-color-scheme: dark) {
  .newsletter-form button {
    background-color: var(--color-accent-secondary);
    color: var(--color-background-primary);
  }
}

.newsletter-form button:hover {
  filter: brightness(1.1);
}

.form-message {
  text-align: center;
  margin-top: var(--spacing-md);
  font-weight: var(--font-weight-bold);
  color: #ffffff;
  height: 24px;
}

.form-legal {
  font-size: 0.85rem;
  margin-top: var(--spacing-md);
  text-align: center;
}

/* FOOTER */
.main-footer {
  background-color: var(--color-background-dark-section);
  padding: var(--spacing-xl) 0 0;
  color: var(--color-text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}

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

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

.footer-column a {
  color: var(--color-text-secondary);
}

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

.footer-column p {
  font-size: 0.95rem;
}

.footer-column address p {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.footer-column address svg {
  flex-shrink: 0;
  margin-top: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  text-align: center;
  font-size: 0.9rem;
}

/* ANIMATIONS */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

.fade-in-section {
  opacity: 0;
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  transform: translateY(20px);
}

.fade-in-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* COOKIE BANNER */
.cookie-consent-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-background-secondary);
  box-shadow: 0 -2px 10px var(--color-shadow);
  padding: var(--spacing-md);
  z-index: 2000;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
  transform: translateY(100%);
  animation: slideUpBanner 0.5s 0.5s forwards;
}

.cookie-consent-banner p {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.cookie-consent-banner button {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-accent-primary);
  color: var(--color-background-secondary);
}

@keyframes slideUpBanner {
  to {
    transform: translateY(0);
  }
}

/* RESPONSIVE DESIGN */
@media (max-width: 1024px) {
  h1 {
    font-size: 2.5rem;
  }
  h2 {
    font-size: 2rem;
  }
  .hero-content h1 {
    font-size: 3rem;
  }

  .articles-grid,
  .materials-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background-color: var(--color-background-secondary);
    padding-top: var(--spacing-xl);
    box-shadow: -5px 0 15px var(--color-shadow);
    transition: right var(--transition-speed-normal) ease-in-out;
  }

  .main-nav.active {
    display: block;
    right: 0;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
  }

  .main-nav a {
    font-size: 1.2rem;
  }

  .mobile-nav-toggle {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  h1 {
    font-size: 2.2rem;
  }
  h2 {
    font-size: 1.8rem;
  }
  .hero-content h1 {
    font-size: 2.5rem;
  }
  .hero-content p {
    font-size: 1.1rem;
  }

  .articles-grid,
  .materials-list,
  .news-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .tabs-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .tab-link {
    flex-grow: 1;
    text-align: center;
  }

  .newsletter-form {
    flex-direction: column;
  }

  .cookie-consent-banner {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }
}

@media (min-width: 1440px) {
  :root {
    --font-size-base: 18px;
  }
  .container {
    max-width: 1320px;
  }
}

@media (min-width: 1920px) {
  :root {
    --font-size-base: 20px;
  }
  .container {
    max-width: 1600px;
  }
}