/* style.css */

/* ---------------------------------- */
/* 1. VARIABLES & THEMES
/* ---------------------------------- */
:root {
  --font-primary: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
    "Segoe UI Symbol";
  --font-secondary: "Roboto Slab", serif;

  /* Light Theme Colors */
  --color-primary: #0057b8; /* Blue */
  --color-secondary: #ffd700; /* Yellow */
  --color-accent: #0d9488; /* Teal for accents */
  --color-text-base: #212529;
  --color-text-muted: #6c757d;
  --color-text-headings: #1a202c;
  --color-background-body: #f8f9fa;
  --color-background-section: #ffffff;
  --color-background-section-alt: #e9ecef;
  --color-border: #dee2e6;
  --color-link: var(--color-primary);
  --color-link-hover: #00418a;
  --color-button-text: #ffffff;
  --color-success: #198754;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --color-shadow-strong: rgba(0, 0, 0, 0.12);

  /* Sizing & Spacing */
  --spacing-xxs: 0.25rem; /* 4px */
  --spacing-xs: 0.5rem; /* 8px */
  --spacing-sm: 1rem; /* 16px */
  --spacing-md: 1.5rem; /* 24px */
  --spacing-lg: 2rem; /* 32px */
  --spacing-xl: 3rem; /* 48px */
  --spacing-xxl: 4rem; /* 64px */

  /* Typography */
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-h1: 2.5rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.5rem;
  --font-size-h4: 1.25rem;
  --line-height-base: 1.65;
  --line-height-headings: 1.3;

  /* Borders & Shadows */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --box-shadow: 0 4px 6px -1px var(--color-shadow),
    0 2px 4px -2px var(--color-shadow);
  --box-shadow-lg: 0 10px 15px -3px var(--color-shadow-strong),
    0 4px 6px -4px var(--color-shadow-strong);
  --transition-speed: 0.3s;
  --transition-timing: ease-in-out;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #007bff;
    --color-secondary: #ffc107;
    --color-accent: #20c997;
    --color-text-base: #dee2e6;
    --color-text-muted: #adb5bd;
    --color-text-headings: #f8f9fa;
    --color-background-body: #121212;
    --color-background-section: #1e1e1e;
    --color-background-section-alt: #2c2c2c;
    --color-border: #495057;
    --color-link: var(--color-primary);
    --color-link-hover: #3395ff;
    --color-button-text: #ffffff;
    --color-success: #28a745;
    --color-shadow: rgba(0, 0, 0, 0.25);
    --color-shadow-strong: rgba(0, 0, 0, 0.4);
  }
}

/* ---------------------------------- */
/* 2. RESET & 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);
  color: var(--color-text-base);
  background-color: var(--color-background-body);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-speed) var(--transition-timing),
    color var(--transition-speed) var(--transition-timing);
}

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

input,
button,
textarea,
select {
  font: inherit;
}

h1,
h2,
h3,
h4 {
  margin-bottom: var(--spacing-md);
  font-family: var(--font-secondary);
  font-weight: 700;
  color: var(--color-text-headings);
  line-height: var(--line-height-headings);
  letter-spacing: -0.5px;
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

h4 {
  font-size: var(--font-size-h4);
}

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

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-speed) var(--transition-timing);
}

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

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

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

ul {
  list-style-type: disc;
}
ol {
  list-style-type: decimal;
}

/* ---------------------------------- */
/* 3. LAYOUT & CONTAINER
/* ---------------------------------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

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

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

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
}

/* ---------------------------------- */
/* 4. HEADER & NAVIGATION
/* ---------------------------------- */
.main-header {
  padding: var(--spacing-sm) 0;
  background-color: var(--color-background-section);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.8);
}

@media (prefers-color-scheme: dark) {
  .main-header {
    background-color: rgba(30, 30, 30, 0.8);
  }
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-text-headings);
  text-decoration: none;
}

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

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

.main-nav ul {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--color-text-base);
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  position: relative;
  text-decoration: none;
}

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

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

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  z-index: 1001;
}

.mobile-nav-toggle .icon {
  width: 28px;
  height: 28px;
  color: var(--color-text-headings);
}

/* ---------------------------------- */
/* 5. BUTTONS & FORMS
/* ---------------------------------- */
.cta-button {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-button-text);
  border: 2px solid var(--color-primary);
  border-radius: var(--border-radius-md);
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: background-color var(--transition-speed) var(--transition-timing),
    color var(--transition-speed) var(--transition-timing),
    transform var(--transition-speed) var(--transition-timing);
}

.cta-button:hover {
  background-color: var(--color-link-hover);
  border-color: var(--color-link-hover);
  color: var(--color-button-text);
  text-decoration: none;
  transform: translateY(-2px);
}

.cta-button:active {
  transform: translateY(0);
}

.header-cta {
  font-size: var(--font-size-sm);
}

.hero-cta {
  font-size: var(--font-size-lg);
  padding: var(--spacing-sm) var(--spacing-lg);
}

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

input[type="text"],
input[type="email"] {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  background-color: var(--color-background-section);
  color: var(--color-text-base);
  transition: border-color var(--transition-speed) var(--transition-timing),
    box-shadow var(--transition-speed) var(--transition-timing);
}

input[type="text"]:focus,
input[type="email"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.register-form {
  max-width: 500px;
  margin: 0 auto;
}

.register-form .cta-button {
  width: 100%;
}

.form-disclaimer {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--spacing-sm);
}

.form-success-message {
  padding: var(--spacing-md);
  background-color: #d1e7dd;
  color: #0f5132;
  border: 1px solid #badbcc;
  border-radius: var(--border-radius-md);
  text-align: center;
}

@media (prefers-color-scheme: dark) {
  .form-success-message {
    background-color: #0f5132;
    color: #d1e7dd;
    border-color: #146c43;
  }
}

/* ---------------------------------- */
/* 6. HERO SECTION
/* ---------------------------------- */
.hero-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--color-background-section);
}

.hero-section .container {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: var(--spacing-xl);
  text-align: center;
}

.hero-content h1 {
  font-size: 2.8rem;
}

.hero-content .subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 65ch;
  margin: var(--spacing-md) auto;
}

.hero-image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--box-shadow-lg);
  margin: var(--spacing-xl) auto 0;
}

/* ---------------------------------- */
/* 7. CONTENT SECTIONS
/* ---------------------------------- */
.content-section {
  padding: var(--spacing-xxl) 0;
}

.content-section-colored {
  padding: var(--spacing-xxl) 0;
  background-color: var(--color-background-section-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

/* ---------------------------------- */
/* 8. FEATURE GRID
/* ---------------------------------- */
.grid-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.feature-item {
  text-align: center;
  padding: var(--spacing-lg);
  background-color: var(--color-background-section);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow);
  transition: transform var(--transition-speed) var(--transition-timing),
    box-shadow var(--transition-speed) var(--transition-timing);
}

.feature-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow-lg);
}

.feature-item .icon {
  color: var(--color-primary);
  margin: 0 auto var(--spacing-md);
  width: 48px;
  height: 48px;
}

.feature-item h3 {
  margin-bottom: var(--spacing-xs);
}

/* ---------------------------------- */
/* 9. TABS
/* ---------------------------------- */
.tabs-container {
  max-width: 900px;
  margin: 0 auto;
}

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

.tab-link {
  padding: var(--spacing-sm) var(--spacing-md);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-muted);
  transition: color var(--transition-speed) var(--transition-timing),
    border-color var(--transition-speed) var(--transition-timing);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

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

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

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

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

.tab-content h3 {
  margin-bottom: var(--spacing-md);
}

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

.tab-content li {
  padding-left: var(--spacing-xs);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------------------------------- */
/* 10. CASE STUDY
/* ---------------------------------- */
.case-study-grid {
  display: grid;
  gap: var(--spacing-xl);
}

.case-study-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  background-color: var(--color-background-section);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  border: 1px solid var(--color-border);
}

.case-study-item img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.case-study-content {
  padding: var(--spacing-lg);
}

/* ---------------------------------- */
/* 11. ACCORDION (FAQ)
/* ---------------------------------- */
.accordion {
  max-width: 800px;
  margin: 0 auto;
}

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

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

.accordion-header {
  width: 100%;
  padding: var(--spacing-md);
  background-color: transparent;
  border: none;
  text-align: left;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-headings);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.accordion-header .icon {
  transition: transform var(--transition-speed) var(--transition-timing);
  flex-shrink: 0;
}

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

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-in-out, padding 0.4s ease-in-out;
}

.accordion-content p {
  padding: 0 var(--spacing-md) var(--spacing-md);
  color: var(--color-text-muted);
}

.faq-link {
  text-align: center;
  margin-top: var(--spacing-lg);
}

/* ---------------------------------- */
/* 12. CTA SECTION
/* ---------------------------------- */
.cta-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--color-primary);
  color: #ffffff;
  text-align: center;
}

.cta-section h2 {
  color: #ffffff;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-lg);
  max-width: 70ch;
  margin-left: auto;
  margin-right: auto;
}

.cta-section .register-form input {
  background-color: #ffffff;
  border-color: #ffffff;
  color: var(--color-text-base);
}

.cta-section .register-form input::placeholder {
  color: var(--color-text-muted);
}

.cta-section .register-form button {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-text-headings);
}

.cta-section .register-form button:hover {
  background-color: #ffcd39;
  border-color: #ffcd39;
}

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

.cta-section .form-disclaimer a:hover {
  color: #ffffff;
}

/* ---------------------------------- */
/* 13. FOOTER
/* ---------------------------------- */
.main-footer {
  padding-top: var(--spacing-xl);
  background-color: var(--color-background-section);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

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

.footer-grid h4 {
  color: var(--color-text-headings);
  margin-bottom: var(--spacing-sm);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.footer-grid li {
  margin-bottom: var(--spacing-xs);
}

.footer-grid a {
  color: var(--color-text-muted);
}

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

.footer-about p {
  font-size: var(--font-size-sm);
}

.footer-contact address {
  font-style: normal;
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

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

/* ---------------------------------- */
/* 14. ANIMATIONS & HELPERS
/* ---------------------------------- */
.animated-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animated-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.animated-section:nth-child(2) {
  transition-delay: 0.1s;
}
.animated-section:nth-child(3) {
  transition-delay: 0.2s;
}
.animated-section:nth-child(4) {
  transition-delay: 0.3s;
}
.animated-section:nth-child(5) {
  transition-delay: 0.4s;
}

/* ---------------------------------- */
/* 15. COOKIE BANNER
/* ---------------------------------- */
.cookie-consent-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-background-section);
  color: var(--color-text-base);
  padding: var(--spacing-md);
  box-shadow: 0 -2px 10px var(--color-shadow);
  z-index: 2000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  transform: translateY(100%);
  animation: slideUp 0.5s ease-out forwards;
}

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

.cookie-consent-banner.hidden {
  display: none;
}

.cookie-consent-text {
  font-size: var(--font-size-sm);
}

.cookie-consent-text a {
  text-decoration: underline;
}

.cookie-consent-button {
  flex-shrink: 0;
  padding: var(--spacing-xs) var(--spacing-md);
}

/* ---------------------------------- */
/* 16. RESPONSIVE DESIGN
/* ---------------------------------- */

/* Tablet Styles */
@media (min-width: 768px) {
  :root {
    --font-size-h1: 3rem;
    --font-size-h2: 2.25rem;
  }

  .main-header .main-nav {
    display: flex;
  }

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

  .hero-section .container {
    grid-template-columns: repeat(2, 1fr);
    text-align: left;
  }

  .hero-content .subtitle {
    margin-left: 0;
    margin-right: 0;
  }

  .hero-image {
    order: 2;
  }

  .hero-image img {
    margin: 0;
  }

  .grid-features {
    grid-template-columns: repeat(3, 1fr);
  }

  .case-study-item {
    grid-template-columns: 300px 1fr;
    align-items: center;
  }

  .case-study-item:nth-child(even) {
    grid-template-columns: 1fr 300px;
  }

  .case-study-item:nth-child(even) img {
    order: 2;
  }

  .case-study-item img {
    height: 100%;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
  }

  .cookie-consent-banner {
    flex-wrap: nowrap;
  }
}

/* Desktop Styles */
@media (min-width: 1024px) {
  :root {
    --font-size-h1: 3.5rem;
    --font-size-h2: 2.75rem;
  }

  .container {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }

  .hero-section {
    padding: 8rem 0;
  }

  .hero-section .container {
    gap: var(--spacing-xxl);
  }

  .content-section,
  .content-section-colored {
    padding: 6rem 0;
  }

  .cta-section {
    padding: 6rem 0;
  }

  .register-form {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
  }

  .register-form .form-group {
    flex-grow: 1;
    margin-bottom: 0;
  }
}

/* Large Desktop Styles */
@media (min-width: 1440px) {
  :root {
    --font-size-base: 18px;
    --font-size-h1: 4rem;
  }
}

/* Additional Mobile Adjustments */
@media (max-width: 767px) {
  .main-header .main-nav {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background-color: var(--color-background-section);
    box-shadow: -5px 0 15px var(--color-shadow);
    flex-direction: column;
    padding-top: var(--spacing-xxl);
    transform: translateX(100%);
    transition: transform 0.4s ease-in-out;
  }

  .main-header .main-nav.is-open {
    display: flex;
    transform: translateX(0);
  }

  .main-header .main-nav ul {
    flex-direction: column;
    gap: 0;
    width: 100%;
    align-items: center;
  }

  .main-header .main-nav li {
    width: 100%;
    text-align: center;
  }

  .main-header .main-nav a {
    display: block;
    padding: var(--spacing-md);
    font-size: var(--font-size-lg);
    border-bottom: 1px solid var(--color-border);
  }

  .main-header .main-nav a::after {
    display: none;
  }

  .main-header .header-cta {
    display: none;
  }

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

  .body-no-scroll {
    overflow: hidden;
  }

  .cookie-consent-banner {
    flex-direction: column;
    text-align: center;
  }
}

/* Fallback for browsers without dark mode preference */
body[data-theme="dark"] {
  --color-primary: #007bff;
  --color-secondary: #ffc107;
  --color-accent: #20c997;
  --color-text-base: #dee2e6;
  --color-text-muted: #adb5bd;
  --color-text-headings: #f8f9fa;
  --color-background-body: #121212;
  --color-background-section: #1e1e1e;
  --color-background-section-alt: #2c2c2c;
  --color-border: #495057;
  --color-link: var(--color-primary);
  --color-link-hover: #3395ff;
  --color-button-text: #ffffff;
  --color-success: #28a745;
  --color-shadow: rgba(0, 0, 0, 0.25);
  --color-shadow-strong: rgba(0, 0, 0, 0.4);
}

body[data-theme="dark"] .main-header {
  background-color: rgba(30, 30, 30, 0.8);
}

body[data-theme="dark"] .form-success-message {
  background-color: #0f5132;
  color: #d1e7dd;
  border-color: #146c43;
}