/* ===== CSS VARIABLES ===== */
:root {
  /* Colors */
  --color-primary: #FF6600;
  --color-primary-dark: #E55A00;
  --color-primary-light: #FF8533;
  --color-white: #FFFFFF;
  --color-off-white: #F8F9FA;
  --color-text-dark: #1F2937;
  --color-text-medium: #6B7280;
  --color-text-light: #9CA3AF;
  --color-border: #E5E7EB;
  --color-shadow: rgba(0, 0, 0, 0.1);
  --color-shadow-hover: rgba(0, 0, 0, 0.15);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;

  /* Layout */
  --container-max-width: 1200px;
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  --transition: all 0.3s ease;

  /* Z-index */
  --z-header: 100;
  --z-modal: 1000;
}

/* ===== RESET & BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-dark);
  background-color: var(--color-white);
  overflow-x: hidden;
}

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

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

/* ===== UTILITY CLASSES ===== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-4xl);
}

.section__title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-dark);
}

.section__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-medium);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-xl);
  border-radius: var(--border-radius);
  font-weight: 500;
  font-size: var(--font-size-base);
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 102, 0, 0.3);
}

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

.btn--secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 102, 0, 0.2);
}

.btn--large {
  padding: var(--spacing-md) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(135deg, 
    rgba(255, 255, 255, 0.95) 0%, 
    rgba(255, 255, 255, 0.9) 50%, 
    rgba(255, 102, 0, 0.1) 100%
  );
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
  z-index: var(--z-header);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.header.scrolled {
  background: linear-gradient(135deg, 
    var(--color-primary) 0%, 
    #FF8533 50%, 
    #FF6600 100%
  );
  box-shadow: 0 4px 30px rgba(255, 102, 0, 0.3);
}

.header.scrolled .nav__logo a,
.header.scrolled .nav__link {
  color: var(--color-white);
  transition: all 0.4s ease;
}

.header.scrolled .btn--primary {
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--color-primary);
  border-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(5px);
  transition: all 0.4s ease;
}

.header.scrolled .btn--primary:hover {
  background-color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 255, 255, 0.3);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav__logo a {
  display: flex;
  align-items: center;
}

.nav__logo-img {
  height: 40px;
  width: auto;
  transition: var(--transition);
}

.nav__logo-img:hover {
  transform: scale(1.05);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
}

.nav__link {
  font-weight: 500;
  color: var(--color-text-dark);
  position: relative;
}

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

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: var(--transition);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav__toggle,
.nav__close {
  display: none;
}

/* ===== HERO SECTION ===== */
.hero {
  padding: 120px 0 var(--spacing-4xl);
  background-color: var(--color-white);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

.hero__title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-dark);
}

.hero__title--highlight {
  color: var(--color-primary);
}

.hero__description {
  font-size: var(--font-size-xl);
  color: var(--color-text-medium);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.7;
}

.hero__buttons {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.hero__image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__illustration {
  width: 100%;
  max-width: 400px;
  height: auto;
}

.hero__illustration svg {
  width: 100%;
  height: auto;
}

/* ===== FEATURES SECTION ===== */
.features {
  padding: var(--spacing-4xl) 0;
  background-color: var(--color-off-white);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-2xl);
}

.feature__card {
  background-color: var(--color-white);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

.feature__card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px var(--color-shadow-hover);
}

.feature__icon {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: 50%;
  margin: 0 auto var(--spacing-lg);
  transition: var(--transition);
  font-size: var(--font-size-3xl);
}

.feature__icon i {
  color: var(--color-white);
  font-size: 2rem;
  line-height: 1;
}

.feature__card:hover .feature__icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 10px 30px rgba(255, 102, 0, 0.4);
}

.feature__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-dark);
}

.feature__description {
  color: var(--color-text-medium);
  line-height: 1.7;
}

/* ===== STATS SECTION ===== */
.stats {
  padding: var(--spacing-4xl) 0;
  background: linear-gradient(135deg, var(--color-white) 0%, var(--color-off-white) 100%);
  position: relative;
  overflow: hidden;
}

.stats::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23FF6600" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.stats__container {
  position: relative;
  z-index: 1;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-4xl);
}

.stat__card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(255, 102, 0, 0.1);
  position: relative;
  overflow: hidden;
}

.stat__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 102, 0, 0.1), transparent);
  transition: left 0.6s ease;
}

.stat__card:hover::before {
  left: 100%;
}

.stat__card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 40px rgba(255, 102, 0, 0.2);
  border-color: var(--color-primary);
}

.stat__number {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  display: inline-block;
  position: relative;
}

.stat__suffix {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-primary);
  display: inline-block;
  margin-left: var(--spacing-xs);
}

.stat__label {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-sm);
}

.stat__description {
  font-size: var(--font-size-sm);
  color: var(--color-text-medium);
  line-height: 1.5;
}

.stats__visual {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(15px);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255, 102, 0, 0.1);
}

.stats__chart {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  align-items: end;
}

.chart__bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.bar__fill {
  width: 60px;
  height: 200px;
  background: linear-gradient(to top, 
    var(--color-primary) 0%, 
    var(--color-primary-light) 50%, 
    #FFB366 100%
  );
  border-radius: 30px;
  position: relative;
  overflow: hidden;
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.bar__fill.animate {
  transform: scaleY(calc(var(--percentage) / 100));
}

.bar__fill::before {
  content: attr(data-percentage) '%';
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  font-weight: 600;
  color: var(--color-text-dark);
  font-size: var(--font-size-sm);
}

.bar__fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: linear-gradient(to bottom, 
    rgba(255, 255, 255, 0.3) 0%, 
    transparent 50%
  );
  border-radius: inherit;
}

.bar__label {
  font-weight: 500;
  color: var(--color-text-dark);
  font-size: var(--font-size-base);
  text-align: center;
}

/* ===== FAQ SECTION ===== */
.faq {
  padding: var(--spacing-4xl) 0;
  background-color: var(--color-white);
}

.faq__accordion {
  max-width: 800px;
  margin: 0 auto;
}

.faq__item {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq__item:hover {
  box-shadow: 0 4px 15px var(--color-shadow);
}

.faq__question {
  width: 100%;
  padding: var(--spacing-xl);
  text-align: left;
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-text-dark);
  background-color: var(--color-white);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
}

.faq__question:hover {
  background-color: var(--color-off-white);
}

.faq__question[aria-expanded="true"] {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.faq__icon {
  font-size: var(--font-size-2xl);
  font-weight: 300;
  transition: var(--transition);
}

.faq__question[aria-expanded="true"] .faq__icon {
  transform: rotate(45deg);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq__answer.active {
  max-height: 200px;
}

.faq__answer p {
  padding: var(--spacing-xl);
  color: var(--color-text-medium);
  line-height: 1.7;
  background-color: var(--color-off-white);
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer__content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer__logo a {
  display: flex;
  align-items: center;
}

.footer__logo-img {
  height: 35px;
  width: auto;
  filter: brightness(0) invert(1); /* Makes the logo white */
  transition: var(--transition);
}

.footer__logo-img:hover {
  transform: scale(1.05);
}

.footer__description {
  margin-top: var(--spacing-md);
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
}

.footer__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--color-white);
}

.footer__links,
.footer__social,
.footer__contact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__links a,
.footer__social a,
.footer__contact li {
  color: rgba(255, 255, 255, 0.8);
  transition: var(--transition);
}

.footer__links a:hover,
.footer__social a:hover {
  color: var(--color-white);
  transform: translateX(4px);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-xl);
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
}

/* ===== RESPONSIVE DESIGN ===== */
@media screen and (max-width: 768px) {
  /* Mobile Navigation */
  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: var(--color-white);
    flex-direction: column;
    justify-content: center;
    transition: var(--transition);
    z-index: var(--z-modal);
  }

  .nav__menu.active {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    gap: var(--spacing-xl);
  }

  .nav__link {
    font-size: var(--font-size-xl);
  }

  .nav__close {
    display: block;
    position: absolute;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    font-size: var(--font-size-3xl);
    color: var(--color-text-dark);
    cursor: pointer;
  }

  .nav__toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
  }

  .nav__toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--color-text-dark);
    transition: var(--transition);
  }

  .header.scrolled .nav__toggle span {
    background-color: var(--color-white);
  }

  .nav__actions .btn {
    display: none;
  }

  .nav__logo-img {
    height: 35px;
  }

  .footer__logo-img {
    height: 30px;
  }

  /* Hero Section */
  .hero {
    padding: 100px 0 var(--spacing-2xl);
    min-height: auto;
  }

  .hero__container {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    text-align: center;
  }

  .hero__title {
    font-size: var(--font-size-3xl);
  }

  .hero__description {
    font-size: var(--font-size-lg);
  }

  .hero__buttons {
    justify-content: center;
  }

  .hero__buttons .btn {
    flex: 1;
    min-width: 200px;
  }

  /* Sections */
  .section__title {
    font-size: var(--font-size-2xl);
  }

  .features__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }

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

  .bar__fill {
    height: 150px;
    width: 50px;
  }

  /* Footer */
  .footer__content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    text-align: center;
  }
}

@media screen and (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .hero__title {
    font-size: var(--font-size-2xl);
  }

  .hero__buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero__buttons .btn {
    width: 100%;
    max-width: 300px;
  }

  .feature__card,
  .stat__card {
    padding: var(--spacing-xl);
  }

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

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

  .bar__fill {
    height: 120px;
    width: 40px;
  }

  .stat__number {
    font-size: var(--font-size-3xl);
  }

  .faq__question {
    padding: var(--spacing-lg);
    font-size: var(--font-size-base);
  }

  .faq__answer p {
    padding: var(--spacing-lg);
  }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__content,
.hero__image {
  animation: fadeInUp 0.8s ease-out;
}

.hero__image {
  animation-delay: 0.2s;
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* Focus styles for keyboard navigation */
.btn:focus,
.nav__link:focus,
.faq__question:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-hover: rgba(0, 0, 0, 0.4);
  }
}