/* style.css */

/* ---------------------------------- */
/* 1. ROOT VARIABLES         */
/* ---------------------------------- */

:root {
  /* Light Theme Palette */
  --bg-primary-light: #f8f9fa;
  --bg-secondary-light: #ffffff;
  --bg-accent-light: #e9ecef;
  --text-primary-light: #212529;
  --text-secondary-light: #495057;
  --text-accent-light: #007bff;
  --border-color-light: #dee2e6;
  --accent-primary-light: #007bff;
  --accent-secondary-light: #0056b3;
  --shadow-color-light: rgba(0, 0, 0, 0.05);

  /* Dark Theme Palette */
  --bg-primary-dark: #121212;
  --bg-secondary-dark: #1e1e1e;
  --bg-accent-dark: #2a2a2a;
  --text-primary-dark: #eaeaea;
  --text-secondary-dark: #a0a0a0;
  --text-accent-dark: #3391ff;
  --border-color-dark: #3a3a3a;
  --accent-primary-dark: #3391ff;
  --accent-secondary-dark: #66b0ff;
  --shadow-color-dark: rgba(0, 0, 0, 0.2);

  /* Typography */
  --font-family-sans: system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-weight-normal: 400;
  --font-weight-bold: 700;
  --line-height-base: 1.6;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-s: 0.5rem;
  --space-m: 1rem;
  --space-l: 1.5rem;
  --space-xl: 2.5rem;
  --space-xxl: 4rem;

  /* Borders & Shadows */
  --border-radius-small: 4px;
  --border-radius-medium: 8px;
  --border-radius-large: 16px;

  /* Transitions */
  --transition-fast: 200ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-medium: 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);

  /* Initial Theme Setup */
  --bg-primary: var(--bg-primary-light);
  --bg-secondary: var(--bg-secondary-light);
  --bg-accent: var(--bg-accent-light);
  --text-primary: var(--text-primary-light);
  --text-secondary: var(--text-secondary-light);
  --text-accent: var(--text-accent-light);
  --border-color: var(--border-color-light);
  --accent-primary: var(--accent-primary-light);
  --accent-secondary: var(--accent-secondary-light);
  --shadow-color: var(--shadow-color-light);
}

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

/* ---------------------------------- */
/* 2. GLOBAL STYLES          */
/* ---------------------------------- */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: var(--line-height-base);
  transition: background-color var(--transition-medium),
    color var(--transition-medium);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-l);
  padding-right: var(--space-l);
}

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

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

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

ul {
  list-style: none;
}

/* ---------------------------------- */
/* 3. SCROLL ANIMATIONS       */
/* ---------------------------------- */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-medium),
    transform var(--transition-medium);
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------------------------------- */
/* 4. HEADER & NAVIGATION       */
/* ---------------------------------- */

.site-header {
  padding: var(--space-m) 0;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(8px);
  background-color: color-mix(in srgb, var(--bg-secondary) 85%, transparent);
}

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

.logo a {
  display: flex;
  align-items: center;
  gap: var(--space-s);
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  text-decoration: none;
}

.logo svg {
  color: var(--accent-primary);
  transition: transform var(--transition-fast);
}

.logo a:hover svg {
  transform: rotate(15deg);
}

.main-navigation ul {
  display: flex;
  gap: var(--space-l);
}

.main-navigation a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--space-s) 0;
  position: relative;
  text-decoration: none;
}

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

.main-navigation a:hover::after,
.main-navigation a.active::after {
  width: 100%;
}

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

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-s);
  color: var(--text-primary);
  z-index: 1001;
}

.mobile-nav-toggle .icon-close {
  display: none;
}

body.nav-open .mobile-nav-toggle .icon-menu {
  display: none;
}

body.nav-open .mobile-nav-toggle .icon-close {
  display: block;
}

/* ---------------------------------- */
/* 5. BUTTONS             */
/* ---------------------------------- */

.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-small);
  font-weight: var(--font-weight-bold);
  text-align: center;
  cursor: pointer;
  transition: background-color var(--transition-fast),
    color var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast);
  border: 2px solid transparent;
  text-decoration: none;
}

.button:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

.button-primary {
  background-color: var(--accent-primary);
  color: var(--bg-secondary);
  border-color: var(--accent-primary);
}

.button-primary:hover {
  background-color: var(--accent-secondary);
  border-color: var(--accent-secondary);
  color: var(--bg-secondary);
  box-shadow: 0 4px 15px
    color-mix(in srgb, var(--accent-primary) 30%, transparent);
}

.button-secondary {
  background-color: transparent;
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.button-secondary:hover {
  background-color: var(--accent-primary);
  color: var(--bg-secondary);
}

.button-large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

.button-small {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

/* ---------------------------------- */
/* 6. SECTIONS             */
/* ---------------------------------- */

.section-padding {
  padding-top: var(--space-xxl);
  padding-bottom: var(--space-xxl);
}

.section-padding-large {
  padding-top: calc(var(--space-xxl) * 1.5);
  padding-bottom: calc(var(--space-xxl) * 1.5);
}

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

.dark-bg {
  background-color: color-mix(in srgb, var(--bg-primary) 70%, black);
  color: var(--text-primary-dark);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-xl);
}

.section-title {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-m);
  color: var(--text-primary);
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Hero Section */
.hero-section {
  padding: 6rem 0;
  text-align: center;
  display: flex;
  align-items: center;
  min-height: 70vh;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.1;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-l);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 750px;
  margin: 0 auto var(--space-xl);
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: var(--space-m);
  flex-wrap: wrap;
}

/* Courses Section */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.course-card {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-medium);
  padding: var(--space-xl);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px var(--shadow-color);
}

.card-icon {
  margin-bottom: var(--space-l);
  color: var(--accent-primary);
}

.card-title {
  font-size: 1.3rem;
  margin-bottom: var(--space-s);
  font-weight: var(--font-weight-bold);
}

.card-description {
  color: var(--text-secondary);
  flex-grow: 1;
  margin-bottom: var(--space-l);
}

.card-link {
  font-weight: var(--font-weight-bold);
  color: var(--accent-primary);
  text-decoration: none;
  align-self: flex-start;
}

.card-link::after {
  content: " →";
  transition: transform var(--transition-fast);
  display: inline-block;
}

.card-link:hover::after {
  transform: translateX(5px);
}

/* Featured Course Section */
.featured-course-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xxl);
  align-items: center;
}

.eyebrow-text {
  display: block;
  font-size: 0.9rem;
  font-weight: var(--font-weight-bold);
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-s);
}

.features-list {
  margin: var(--space-xl) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-m);
}

.features-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-m);
  color: var(--text-secondary);
}

.feature-icon {
  color: var(--accent-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.visual-placeholder {
  background-color: var(--bg-accent);
  border-radius: var(--border-radius-large);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-xxl);
}

.placeholder-icon {
  color: var(--accent-primary);
  opacity: 0.5;
}

/* PDF Download Section */
.pdf-download-section {
  background-color: var(--accent-primary);
  color: #fff;
  text-align: center;
}

.pdf-download-section .section-title,
.pdf-download-section .section-subtitle {
  color: #fff;
}

.pdf-download-section .button-primary {
  background-color: #fff;
  color: var(--accent-primary);
  border-color: #fff;
}

.pdf-download-section .button-primary:hover {
  background-color: var(--bg-accent-light);
  border-color: var(--bg-accent-light);
}

.pdf-icon {
  margin: 0 auto var(--space-l);
}

/* Experts Advice Section */
.advice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.advice-card {
  background-color: var(--bg-secondary);
  padding: var(--space-xl);
  border-radius: var(--border-radius-medium);
  border-left: 4px solid var(--accent-primary);
}

.advice-quote p {
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: var(--space-l);
}

.advice-author {
  display: flex;
  align-items: center;
  gap: var(--space-m);
}

.author-icon-placeholder {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--bg-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  flex-shrink: 0;
}

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

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

/* Testimonials Section */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.testimonial-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: var(--space-xl);
  border-radius: var(--border-radius-medium);
}

.testimonial-rating {
  display: flex;
  gap: var(--space-xs);
  color: #ffc107;
  margin-bottom: var(--space-m);
}

.star-icon {
  width: 20px;
  height: 20px;
}

.testimonial-text {
  color: var(--text-secondary);
  margin-bottom: var(--space-l);
}

.testimonial-author .author-name {
  font-weight: var(--font-weight-bold);
  font-style: normal;
}

.testimonial-author .author-meta {
  font-style: normal;
  color: var(--text-secondary);
}

/* ---------------------------------- */
/* 7. FOOTER             */
/* ---------------------------------- */

.site-footer {
  color: var(--text-secondary-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.footer-logo span {
  color: var(--text-primary-dark);
}

.footer-description {
  margin-top: var(--space-m);
  font-size: 0.9rem;
}

.footer-heading {
  font-size: 1.1rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary-dark);
  margin-bottom: var(--space-l);
}

.footer-list li {
  margin-bottom: var(--space-s);
}

.footer-list a {
  color: var(--text-secondary-dark);
  text-decoration: none;
}

.footer-list a:hover {
  color: #fff;
  text-decoration: underline;
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-s);
}

.contact-icon {
  margin-top: 4px;
  flex-shrink: 0;
}

.footer-bottom {
  padding-top: var(--space-xl);
  margin-top: var(--space-xl);
  border-top: 1px solid var(--border-color-dark);
  text-align: center;
  font-size: 0.9rem;
}

/* ---------------------------------- */
/* 8. COOKIE BANNER         */
/* ---------------------------------- */

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  padding: var(--space-m);
  box-shadow: 0 -5px 15px var(--shadow-color);
  z-index: 2000;
  transform: translateY(100%);
  transition: transform var(--transition-medium);
  border-top: 1px solid var(--border-color);
}

.cookie-banner.is-visible {
  transform: translateY(0);
}

.cookie-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-l);
  flex-wrap: wrap;
}

.cookie-text {
  flex-grow: 1;
  font-size: 0.9rem;
}

.cookie-text a {
  font-weight: var(--font-weight-bold);
}

/* ---------------------------------- */
/* 9. RESPONSIVE DESIGN       */
/* ---------------------------------- */

@media (max-width: 992px) {
  .featured-course-content {
    grid-template-columns: 1fr;
  }

  .featured-course-visual {
    order: -1;
    max-width: 400px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .main-navigation {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: var(--space-l);
    box-shadow: 0 10px 20px var(--shadow-color);
  }

  body.nav-open .main-navigation {
    display: flex;
  }

  .main-navigation ul {
    flex-direction: column;
    align-items: center;
  }

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

  .header-actions {
    display: none;
  }

  .hero-section {
    padding: 4rem 0;
    min-height: auto;
  }

  .section-padding {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-xl);
  }

  .section-padding-large {
    padding-top: var(--space-xxl);
    padding-bottom: var(--space-xxl);
  }
}