/* style.css */

/* --------------------------------------------------- */
/* 1. CSS VARIABLES & THEMES
/* --------------------------------------------------- */

:root {
  /* Light Theme */
  --font-primary: "Helvetica Neue", Arial, sans-serif;
  --font-secondary: Georgia, serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-bold: 700;

  --color-background: #fdfdfd;
  --color-background-secondary: #f4f5f7;
  --color-background-accent: #ffffff;
  --color-text-primary: #1e1e1e;
  --color-text-secondary: #5a5a5a;
  --color-text-muted: #888888;

  --color-primary: #005a9c;
  --color-primary-hover: #004a80;
  --color-primary-light: #e6f0f7;

  --color-accent: #d97706;
  --color-accent-hover: #b45f06;

  --color-border: #e1e1e1;
  --color-border-light: #f0f0f0;
  --color-shadow: rgba(0, 0, 0, 0.05);
  --color-shadow-medium: rgba(0, 0, 0, 0.1);

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 64px;

  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;

  --transition-fast: 0.2s ease-in-out;
  --transition-medium: 0.4s ease-in-out;

  --container-width: 1200px;
  --header-height: 80px;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Dark Theme */
    --color-background: #121212;
    --color-background-secondary: #1e1e1e;
    --color-background-accent: #2a2a2a;
    --color-text-primary: #f5f5f5;
    --color-text-secondary: #b0b0b0;
    --color-text-muted: #7a7a7a;

    --color-primary: #4dabf7;
    --color-primary-hover: #74c0fc;
    --color-primary-light: #2c3e50;

    --color-accent: #f59e0b;
    --color-accent-hover: #fdba74;

    --color-border: #3a3a3a;
    --color-border-light: #2c2c2c;
    --color-shadow: rgba(0, 0, 0, 0.2);
    --color-shadow-medium: rgba(0, 0, 0, 0.4);
  }
}

/* --------------------------------------------------- */
/* 2. GLOBAL STYLES & RESET
  /* --------------------------------------------------- */

*,
*::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-primary);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  line-height: 1.7;
  font-weight: var(--font-weight-normal);
  transition: background-color var(--transition-medium),
    color var(--transition-medium);
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

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

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

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

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);
  color: var(--color-text-secondary);
}

ul,
ol {
  list-style-position: inside;
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

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

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

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

/* --------------------------------------------------- */
/* 3. UTILITY & LAYOUT CLASSES
  /* --------------------------------------------------- */

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

.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-sm);
}

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

.cta-button {
  display: inline-block;
  font-weight: var(--font-weight-bold);
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  border: 2px solid transparent;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
  background-color: var(--color-primary);
  color: #ffffff;
}

.cta-button:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--color-shadow-medium);
  text-decoration: none;
  color: #ffffff;
}

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

.cta-button.secondary:hover {
  background-color: var(--color-primary);
  color: #ffffff;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: var(--header-height);
  background-color: var(--color-background);
  box-shadow: 0 2px 10px var(--color-shadow);
  transition: background-color var(--transition-medium);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

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

.logo:hover {
  color: var(--color-primary);
  text-decoration: none;
}

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

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

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

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

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

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

body {
  padding-top: var(--header-height);
}

/* --------------------------------------------------- */
/* 5. HERO SECTION
  /* --------------------------------------------------- */

.hero-section {
  padding: 8rem 0;
  text-align: center;
  background-color: var(--color-background-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
}

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

.hero-content h1 {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-lg);
}

.hero-content .subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

.hero-cta {
  font-size: 1.125rem;
  padding: var(--spacing-lg) var(--spacing-xxl);
  border-radius: 50px;
}

/* --------------------------------------------------- */
/* 6. SOLUTIONS SECTION
  /* --------------------------------------------------- */

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

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.solution-card {
  background-color: var(--color-background-accent);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-xl);
  text-align: center;
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast);
  box-shadow: 0 4px 6px var(--color-shadow);
}

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

.solution-icon {
  color: var(--color-primary);
  margin: 0 auto var(--spacing-lg);
}

.solution-card h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.solution-card p {
  font-size: 0.95rem;
}

/* --------------------------------------------------- */
/* 7. HOW IT WORKS SECTION
  /* --------------------------------------------------- */

.how-it-works-section {
  background-color: var(--color-background-secondary);
}

.process-steps {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.process-steps::before {
  content: "";
  position: absolute;
  top: 20px;
  left: 20px;
  bottom: 20px;
  width: 4px;
  background-color: var(--color-primary-light);
  border-radius: 2px;
}

.step {
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--spacing-xl);
  position: relative;
  padding-left: 60px;
}

.step:last-child {
  margin-bottom: 0;
}

.step-number {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  left: 0;
  top: 0;
  border: 4px solid var(--color-background-secondary);
}

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

/* --------------------------------------------------- */
/* 8. FOR WHOM SECTION (TABS)
  /* --------------------------------------------------- */

.for-whom-section {
  background-color: var(--color-background);
}

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

.tabs-nav {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  border-bottom: 2px solid var(--color-border);
}

.tab-link {
  padding: var(--spacing-md) var(--spacing-lg);
  cursor: pointer;
  background-color: transparent;
  border: none;
  font-size: 1.1rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-secondary);
  position: relative;
  transition: color var(--transition-fast);
}

.tab-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

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

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

.tab-pane {
  display: none;
}

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

.tab-pane h3 {
  margin-bottom: var(--spacing-lg);
}

.tab-pane ul {
  padding-left: var(--spacing-lg);
  list-style-type: "✓";
}

.tab-pane ul li {
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

/* --------------------------------------------------- */
/* 9. CASE STUDY SECTION
  /* --------------------------------------------------- */

.case-study-section {
  background-color: var(--color-background-secondary);
}

.case-study-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

.case-study-image img {
  border-radius: var(--border-radius-lg);
  box-shadow: 0 15px 30px var(--color-shadow-medium);
}

.case-study-details h3 {
  color: var(--color-text-primary);
}

.case-study-details h4 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  border-left: 3px solid var(--color-primary);
  padding-left: var(--spacing-md);
}

.case-study-details ol {
  padding-left: var(--spacing-lg);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
  text-align: center;
}

.result-item {
  background-color: var(--color-primary-light);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
}

.result-value {
  display: block;
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

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

.client-quote {
  font-family: var(--font-secondary);
  font-style: italic;
  font-size: 1.1rem;
  padding-left: var(--spacing-lg);
  border-left: 3px solid var(--color-border);
  margin-top: var(--spacing-xl);
}

.client-quote-author {
  text-align: right;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

/* --------------------------------------------------- */
/* 10. TESTIMONIALS SECTION
  /* --------------------------------------------------- */

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

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.testimonial-card {
  background-color: var(--color-background-accent);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-card p {
  font-family: var(--font-secondary);
  font-style: italic;
  flex-grow: 1;
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-left: 40px;
}

.testimonial-card p::before {
  content: "“";
  font-size: 4rem;
  position: absolute;
  left: 0;
  top: -10px;
  color: var(--color-primary-light);
  line-height: 1;
}

.testimonial-author {
  text-align: right;
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-md);
}

.testimonial-author h4 {
  margin: 0;
  font-size: 1rem;
}

.testimonial-author span {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* --------------------------------------------------- */
/* 11. FAQ SECTION (ACCORDION)
  /* --------------------------------------------------- */

.faq-section {
  background-color: var(--color-background-secondary);
}

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

.accordion-item {
  background-color: var(--color-background-accent);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}

.accordion-item:last-child {
  margin-bottom: 0;
}

.accordion-header {
  width: 100%;
  padding: var(--spacing-lg);
  text-align: left;
  background-color: transparent;
  border: none;
  font-size: 1.15rem;
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text-primary);
}

.accordion-header::after {
  content: "+";
  font-size: 2rem;
  font-weight: var(--font-weight-light);
  color: var(--color-primary);
  transform: rotate(0deg);
  transition: transform var(--transition-fast);
}

.accordion-item.active .accordion-header::after {
  content: "−";
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-medium),
    padding var(--transition-medium);
}

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

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

/* --------------------------------------------------- */
/* 12. REGISTRATION FORM SECTION
  /* --------------------------------------------------- */

.registration-form-section {
  background-color: var(--color-primary-light);
  padding: var(--spacing-xxl) 0;
}

.form-container-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
  background-color: var(--color-background-accent);
  padding: var(--spacing-xxl);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 10px 30px var(--color-shadow-medium);
}

.form-description h2 {
  color: var(--color-primary);
}

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

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

.form-group label {
  display: block;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.form-group input {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: 1rem;
  background-color: var(--color-background-secondary);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-wrapper button {
  width: 100%;
  padding: var(--spacing-lg);
  font-size: 1.1rem;
}

.form-success-message {
  text-align: center;
  padding: var(--spacing-xl);
  border: 2px solid var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: var(--border-radius-md);
}

.form-success-message h4 {
  color: var(--color-primary);
}

/* --------------------------------------------------- */
/* 13. FOOTER
  /* --------------------------------------------------- */

.site-footer {
  background-color: var(--color-background-secondary);
  color: var(--color-text-secondary);
  padding-top: var(--spacing-xxl);
  border-top: 5px solid var(--color-primary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--spacing-xl);
  padding-bottom: var(--spacing-xxl);
}

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

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

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

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

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

.contact-info address {
  font-style: normal;
  line-height: 1.6;
}

.contact-info p {
  margin-bottom: var(--spacing-sm);
}

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

/* --------------------------------------------------- */
/* 14. ANIMATIONS & HELPERS
  /* --------------------------------------------------- */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* --------------------------------------------------- */
/* 15. MOBILE & RESPONSIVE STYLES
  /* --------------------------------------------------- */

@media (max-width: 1200px) {
  .container {
    max-width: 960px;
  }
  .case-study-content {
    gap: var(--spacing-xl);
  }
}

@media (max-width: 992px) {
  h1 {
    font-size: 2.5rem;
  }
  .hero-content h1 {
    font-size: 3rem;
  }
  h2 {
    font-size: 2rem;
  }

  .solutions-grid,
  .testimonials-grid {
    grid-template-columns: 1fr 1fr;
  }

  .case-study-content {
    grid-template-columns: 1fr;
  }

  .case-study-image {
    max-width: 500px;
    margin: 0 auto;
    margin-bottom: var(--spacing-xl);
  }

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

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

  .about-us,
  .contact-info {
    grid-column: 1 / -1;
  }

  .main-navigation {
    display: none;
  }

  .header-cta {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }

  body {
    padding-top: var(--header-height);
  }

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

  h1 {
    font-size: 2rem;
  }

  .hero-content h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .solutions-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .process-steps::before {
    left: 15px;
  }
  .step {
    padding-left: 50px;
  }
  .step-number {
    width: 38px;
    height: 38px;
    font-size: 1.1rem;
  }

  .tabs-nav {
    flex-direction: column;
    border-bottom: none;
  }

  .tab-link {
    border-bottom: 1px solid var(--color-border);
  }

  .tab-link::after {
    display: none;
  }

  .form-container-wrapper {
    padding: var(--spacing-xl);
  }

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

@media (max-width: 576px) {
  .hero-section {
    padding: 4rem 0;
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }

  .hero-content .subtitle {
    font-size: 1.1rem;
  }

  .hero-cta {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
  }

  .results-grid {
    grid-template-columns: 1fr;
  }

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

/* --------------------------------------------------- */
/* 16. COOKIE BANNER
  /* --------------------------------------------------- */

.cookie-consent-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-background-accent);
  color: var(--color-text-primary);
  box-shadow: 0 -5px 15px var(--color-shadow-medium);
  z-index: 2000;
  padding: var(--spacing-lg);
  transition: transform 0.5s ease-in-out;
  transform: translateY(100%);
}

.cookie-consent-banner.active {
  transform: translateY(0);
}

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

.cookie-consent-text {
  font-size: 0.9rem;
}

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

.cookie-consent-button:hover {
  background-color: var(--color-primary-hover);
}

@media (max-width: 768px) {
  .cookie-consent-content {
    flex-direction: column;
    text-align: center;
  }
  .cookie-consent-text {
    margin-bottom: var(--spacing-md);
  }
}