/* ========================================
   1. CSS Variables & Theming
   ======================================== */

:root {
  /* Light Theme Palette */
  --color-background: #f8f9fa;
  --color-surface: #ffffff;
  --color-primary: #345e7a;
  --color-secondary: #5a7d9a;
  --color-accent: #e07a5f;
  --color-text-primary: #212529;
  --color-text-secondary: #6c757d;
  --color-border: #dee2e6;
  --color-success: #28a745;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);

  /* Typography */
  --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-family-serif: "Georgia", "Times New Roman", serif;
  --font-size-base: 1rem;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-bold: 700;
  --line-height-base: 1.7;

  /* Spacing & Sizing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2.5rem;
  --spacing-xxl: 4rem;
  --container-width: 1200px;
  --container-padding: var(--spacing-lg);
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;

  /* Transitions */
  --transition-fast: all 0.2s ease-in-out;
  --transition-medium: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Dark Theme Palette */
    --color-background: #121212;
    --color-surface: #1e1e1e;
    --color-primary: #8ab4f8;
    --color-secondary: #a8c7fa;
    --color-accent: #f28b6a;
    --color-text-primary: #e8eaed;
    --color-text-secondary: #9aa0a6;
    --color-border: #3a3f44;
    --color-success: #52d869;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  }
}

/* ========================================
   2. Global Resets & Base Styles
   ======================================== */

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-background);
  color: var(--color-text-primary);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  font-weight: var(--font-weight-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex-grow: 1;
}

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

/* ========================================
   3. Typography System
   ======================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-serif);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.5px;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  font-family: var(--font-family-sans);
  font-weight: var(--font-weight-bold);
}

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

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

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

ul,
ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-lg);
}

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

ul li {
  padding-left: var(--spacing-sm);
  position: relative;
}

ul li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

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

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

blockquote cite {
  font-style: normal;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

strong {
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
}

/* ========================================
   4. Layout & Helpers
   ======================================== */

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

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

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

.section-header p {
  color: var(--color-text-secondary);
  font-size: 1.125rem;
}

/* ========================================
   5. Component Styles
   ======================================== */

/* Header & Navigation */
.main-header {
  padding: var(--spacing-md) 0;
  position: absolute;
  width: 100%;
  z-index: 100;
  top: 0;
  left: 0;
  background-color: transparent;
  transition: var(--transition-medium);
}

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

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

.logo:hover {
  text-decoration: none;
}

.logo strong {
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.main-navigation ul {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-navigation li {
  margin: 0;
  margin-left: var(--spacing-lg);
}

.main-navigation a {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-normal);
  text-decoration: none;
  padding: var(--spacing-sm) 0;
  position: relative;
}

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

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

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

.main-navigation .button-primary {
  margin-left: var(--spacing-lg);
  padding: var(--spacing-sm) var(--spacing-lg);
}

.main-navigation .button-primary:hover::after {
  width: 0;
}

/* Footer */
.main-footer {
  background-color: var(--color-surface);
  color: var(--color-text-secondary);
  padding: var(--spacing-xxl) 0 var(--spacing-lg) 0;
  border-top: 1px solid var(--color-border);
}

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

.footer-column h4 {
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-primary);
}

.footer-column ul {
  list-style: none;
  padding: 0;
}

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

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

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

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

.footer-column.contact svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-lg);
  text-align: center;
  font-size: 0.875rem;
}

/* Buttons */
.button-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: var(--spacing-md) var(--spacing-xl);
  border: 2px solid var(--color-primary);
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.button-primary:hover,
.button-primary:focus {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-surface);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

.button-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.button-primary svg {
  transition: transform 0.2s ease-in-out;
}

.button-primary:hover svg {
  transform: translateX(4px);
}

/* Forms */
.registration-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  max-width: 500px;
  margin: 0 auto;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
}

.form-group input {
  font-size: 1.125rem;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  transition: var(--transition-fast);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(52, 94, 122, 0.2);
}

.thank-you-note {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  max-width: 500px;
  margin: 0 auto;
  border: 1px solid var(--color-border);
}

.thank-you-note svg {
  color: var(--color-success);
  width: 48px;
  height: 48px;
  margin: 0 auto var(--spacing-md) auto;
}

.thank-you-note h3 {
  margin-bottom: var(--spacing-sm);
}

.thank-you-note p {
  color: var(--color-text-secondary);
  margin: 0;
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-color: var(--color-background);
}

.hero-title {
  opacity: 0;
  animation: fadeIn 2s ease-out 0.5s forwards;
  color: var(--color-text-primary);
  font-weight: var(--font-weight-light);
  letter-spacing: 1px;
}

/* Intro Section */
.slow-intro-section {
  background-color: var(--color-surface);
}

.intro-text-wrapper {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.intro-text-wrapper p {
  font-size: 1.25rem;
  font-family: var(--font-family-serif);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* Section Dividers */
.section-divider {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-xl) 0;
  background-color: var(--color-surface);
}

.section-divider svg {
  color: var(--color-border);
}

/* Interactive Tabs */
.interactive-tabs-section {
  background-color: var(--color-background);
}

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

.tab-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.tab-button {
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  background-color: transparent;
  cursor: pointer;
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-secondary);
  position: relative;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.tab-button::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transition: var(--transition-medium);
}

.tab-button.active {
  color: var(--color-text-primary);
}

.tab-button.active::after {
  transform: scaleX(1);
}

.tab-button:hover,
.tab-button:focus {
  color: var(--color-text-primary);
}

.tab-button svg {
  width: 20px;
  height: 20px;
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
}

.tab-button:hover svg,
.tab-button.active svg {
  color: var(--color-primary);
}

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

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

.tab-content h3 {
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

/* Accordion */
.accordion-section {
  background-color: var(--color-surface);
}

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

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

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

.accordion-header {
  width: 100%;
  background-color: transparent;
  border: none;
  padding: var(--spacing-lg) var(--spacing-xl);
  text-align: left;
  font-size: 1.25rem;
  font-family: var(--font-family-serif);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease;
}

.accordion-header:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

@media (prefers-color-scheme: dark) {
  .accordion-header:hover {
    background-color: rgba(255, 255, 255, 0.05);
  }
}

.accordion-header svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
  transition: var(--transition-medium);
  flex-shrink: 0;
}

.accordion-item.active .accordion-header svg {
  transform: rotate(45deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.25, 0.8, 0.25, 1),
    padding 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.accordion-content p {
  padding: 0 var(--spacing-xl) var(--spacing-lg) var(--spacing-xl);
  color: var(--color-text-secondary);
  font-size: 1rem;
  margin-bottom: 0;
}

.accordion-item.active .accordion-content {
  padding-top: var(--spacing-sm);
}

/* Audio Grid & Cards */
.audio-section {
  background-color: var(--color-background);
}

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

.audio-card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-medium);
  display: flex;
  flex-direction: column;
}

.audio-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.audio-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.audio-card-content {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.audio-card-content h3 {
  margin-bottom: var(--spacing-sm);
}

.audio-card-content p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  flex-grow: 1;
}

.audio-card audio {
  width: 100%;
  margin-top: auto;
}

/* Testimonials */
.testimonials-section {
  background-color: var(--color-surface);
}

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

.testimonial-card {
  background-color: var(--color-background);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-border);
  margin: 0;
}

.testimonial-card p {
  font-style: italic;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-left: var(--spacing-lg);
}

.testimonial-card p::before {
  content: "“";
  font-family: var(--font-family-serif);
  font-size: 4rem;
  color: var(--color-accent);
  opacity: 0.2;
  position: absolute;
  left: -10px;
  top: -20px;
}

.testimonial-card footer {
  text-align: right;
}

.testimonial-card cite {
  display: block;
  font-weight: var(--font-weight-bold);
  font-style: normal;
  color: var(--color-text-primary);
}

.testimonial-card footer span {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* CTA Section */
.cta-section {
  background-color: var(--color-primary);
  color: var(--color-background);
  text-align: center;
}

.cta-section h2 {
  color: inherit;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--spacing-xl);
}

.cta-section .button-primary {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-background);
}

.cta-section .button-primary:hover {
  background-color: #f4977a;
  border-color: #f4977a;
}

.cta-section .form-group label {
  color: rgba(255, 255, 255, 0.8);
}

.cta-section .form-group input {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

.cta-section .form-group input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.cta-section .form-group input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(224, 122, 95, 0.3);
}

.cta-section .thank-you-note {
  background-color: transparent;
  border: none;
}

.cta-section .thank-you-note h3,
.cta-section .thank-you-note p {
  color: var(--color-background);
}

/* Cookie Notice */
.cookie-notice {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-lg);
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
  transform: translateY(100%);
  animation: slideUp 0.5s ease-out forwards;
}

.cookie-notice-text {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0;
}

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

.cookie-accept-button {
  flex-shrink: 0;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
}

.cookie-accept-button:hover {
  background-color: var(--color-secondary);
}

.cookie-notice.is-hidden {
  animation: slideDown 0.5s ease-in forwards;
}

/* ========================================
   6. Animations & Utility Classes
   ======================================== */

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

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(110%);
  }
}

.fade-in-text,
.scroll-animate {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.8, 0.25, 1),
    transform 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.fade-in-text.is-visible,
.scroll-animate.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-text:nth-child(2) {
  transition-delay: 0.2s;
}
.fade-in-text:nth-child(3) {
  transition-delay: 0.4s;
}

/* ========================================
   7. Responsive Media Queries
   ======================================== */

/* Mobile Navigation Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.mobile-nav-toggle svg {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

/* From Tablets Up */
@media (max-width: 992px) {
  .main-navigation {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100vh;
    background-color: var(--color-surface);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: var(--transition-medium);
    padding-top: var(--spacing-xxl);
  }
  .main-navigation.is-open {
    transform: translateX(0);
  }
  .main-navigation ul {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-xl);
  }
  .main-navigation li {
    margin: 0 0 var(--spacing-lg) 0;
    width: 100%;
  }
  .main-navigation a {
    font-size: 1.25rem;
  }
  .mobile-nav-toggle {
    display: block;
  }
  .footer-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
}

/* Small Tablets and Large Phones */
@media (max-width: 768px) {
  :root {
    --spacing-xxl: 3rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-column.contact p {
    justify-content: center;
  }
  .cookie-notice {
    flex-direction: column;
    text-align: center;
  }
  .tab-buttons {
    gap: 0;
  }
  .tab-button {
    flex-grow: 1;
    padding: var(--spacing-md);
  }
}

/* Mobile Phones */
@media (max-width: 576px) {
  :root {
    --container-padding: var(--spacing-md);
  }

  .main-navigation {
    width: 100%;
  }

  .accordion-header {
    font-size: 1.1rem;
    padding: var(--spacing-md) var(--spacing-lg);
  }
  .accordion-content p {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
  .registration-form {
    flex-direction: column;
  }
}