:root {
  /* === Colors === */
  --color-black: #000;
  --color-white: #fff;
  --color-gold: #b88932;
  --color-gold-light: #d4a556;
  --color-dark-gray: #2e2e2e;
  --color-text-muted: #ddd;

  /* === Fonts === */
  --font-primary: "PoppinsFont", "Playfair Display", serif;
  --font-heading: "Cinzel", serif;

  /* === Sizing & Spacing === */
  --max-width: 1200px;
  --transition: 0.3s ease;
  --border-radius: 8px;
  --scroll-padding: 8rem;
  --scroll-offset: 100px;
  
  /* === Performance === */
  --will-change-transform: will-change: transform;
  --contain-layout: contain: layout;
}

@font-face {
  font-family: "PoppinsFont";
  src: url("../assets/fonts/Poppins-Regular.ttf") format("truetype");
  font-weight: normal;
  font-style: normal;
  font-display: swap; /* Performance optimization */
}

/* === Global Reset & Base Styles === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--scroll-padding);
}

body {
  font-family: var(--font-primary);
  color: var(--color-white);
  background-color: var(--color-black);
  line-height: 1.6;
  text-rendering: optimizeSpeed; /* Performance optimization */
}

h1,
h2,
h3,
.btn {
  font-family: var(--font-primary);
  color: var(--color-gold);
  line-height: 1.2;
}

p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* === Header === */
.site-header {
  position: sticky;
  top: 0;
  background-color: #222;
  color: var(--color-gold);
  padding: 1rem 0;
  z-index: 1000;
  contain: layout style; /* Performance optimization */
}

.site-header .container {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  justify-content: space-between;
}

.desktop-nav {
  justify-self: start;
  display: flex;
  gap: 2rem;
}

/* Base Nav */
.nav {
  position: fixed;
  top: 0;
  left: -100%;
  width: 80%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.95);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 4rem 2rem;
  transition: left 0.3s ease;
  z-index: 999;
  contain: layout style; /* Performance optimization */
}

.nav.open {
  left: 0;
}

/* Links at the Top */
.nav-links a {
  display: block;
  margin-bottom: 2rem;
  font-size: 1.5rem;
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: color var(--transition), transform 0.2s ease;
}

/* CTAs at the Bottom */
.nav-ctas {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nav-ctas .btn {
  width: 100%;
}

.nav-links a:hover,
.nav-ctas a:hover,
.desktop-nav a:hover {
  color: var(--color-gold-light);
  transform: scale(1.05);
}

.header-ctas {
  justify-self: end;
  display: flex;
  gap: 1rem;
}

.header-ctas a:hover {
  background: linear-gradient(
    135deg,
    var(--color-gold-light),
    var(--color-gold)
  );
  color: var(--color-white);
  transform: scale(1.05);
}

/* Hide Nav on Desktop */
@media (min-width: 769px) {
  .nav {
    position: static;
    display: flex;
    flex-direction: row;
    justify-content: flex-end;
    background: none;
    height: auto;
    width: auto;
    left: 0;
    padding: 0;
  }

  .nav-links,
  .nav-ctas {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
  }

  .nav-ctas .btn {
    width: auto;
  }
}

/* Burger Icon */
.menu-toggle {
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 2rem;
  cursor: pointer;
  display: none;
  transition: transform 0.2s ease;
}

@media (max-width: 768px) {
  .site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .logo {
    margin-left: auto;
    padding-right: 1rem;
    display: flex;
    align-items: center;
  }

  .menu-toggle {
    margin-right: auto;
    display: block;
    font-size: 2.2rem;
    background: none;
    border: none;
    color: var(--color-white);
    cursor: pointer;
    padding-left: 1rem;
    padding-right: 1rem;
    color: var(--color-gold);
  }

  .menu-toggle:active {
    transform: scale(1.5);
    opacity: 0.8;
  }

  .desktop-nav,
  .header-ctas {
    display: none;
  }
}

/* Mobile Navigation Overlay */
.mobile-nav {
  position: fixed;
  top: 0;
  left: -100%;
  width: 80%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(5px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 4rem 2rem;
  transition: left 0.3s ease;
  z-index: 999;
  contain: layout style; /* Performance optimization */
}

.mobile-nav.open {
  left: 0;
}

.mobile-nav .nav-links a,
.mobile-nav .nav-ctas a {
  display: block;
  margin-bottom: 2rem;
  font-size: 1.5rem;
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.close-menu {
  background: none;
  border: none;
  color: var(--color-gold);
  font-size: 2rem;
  position: absolute;
  top: 1rem;
  right: 1rem;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.close-menu:hover {
  transform: scale(1.1);
}

.scroll-down {
  display: inline-block;
  color: var(--color-gold);
  font-size: 1.5rem;
  text-decoration: none;
  animation: bounce 2s infinite;
  transition: color var(--transition);
}

.scroll-down:hover {
  color: var(--color-gold);
}

@media (max-width: 768px) {
  .scroll-down {
    display: none;
  }
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(10px);
  }
  60% {
    transform: translateY(5px);
  }
}

/* === Buttons === */
.btn {
  font-family: var(--font-primary);
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  display: inline-block;
  font-weight: bold;
  text-align: center;
  transition: background var(--transition), transform 0.2s ease;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--color-gold),
    var(--color-gold-light)
  );
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(
    135deg,
    var(--color-gold-light),
    var(--color-gold)
  );
  transform: scale(1.05);
}

.btn-outline {
  border: 2px solid var(--color-white);
  color: var(--color-white);
}

.btn-outline:hover {
  background-color: var(--color-white);
  color: var(--color-black);
  transform: scale(1.05);
}

/* === Hero Section === */
.hero {
  padding-top: 10rem;
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
    url("../assets/images/black-and-gold-background-desktop.webp") no-repeat center/cover;
  color: var(--color-gold);
  text-align: center;
  padding: 6rem 1rem;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  contain: layout style; /* Performance optimization */
}

/* Responsive background images for different screen sizes */
@media (max-width: 800px) {
  .hero {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
      url("../assets/images/black-and-gold-background-mobile.webp") no-repeat center/cover;
  }
}

@media (min-width: 1920px) {
  .hero {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
      url("../assets/images/black-and-gold-background-2x.webp") no-repeat center/cover;
  }
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero .tagline {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.hero-cta {
  padding: 1rem 2.5rem;
  margin-top: 2rem;
}

@media (max-width: 768px) {
  .hero {
    padding-top: 42rem;
    padding-bottom: 16rem;
  }

  .hero-cta {
    margin-bottom: 32rem;
  }
}

.logo-img {
  width: 150px;
  height: auto;
  contain: layout; /* Performance optimization */
}

.logo picture.logo-img {
  display: block;
}

.logo picture.logo-img img {
  width: 100%;
  height: auto;
}

.telegram-icon {
  display: inline-block;
}

.telegram-icon img {
  width: 100%;
  height: auto;
}

.divider-stripe {
  width: 100%;
  overflow: hidden;
  position: relative;
  contain: layout; /* Performance optimization */
}

.divider-stripe img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  opacity: 0.7;
  filter: blur(0px);
}

.divider-stripe::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.5),
    rgba(0, 0, 0, 0.8)
  );
}

/* === Partners Section === */
.partners {
  text-align: center;
  padding: 4rem 1rem;
  background: linear-gradient(
    var(--color-gold) 0%,
    var(--color-gold-light) 40%,
    var(--color-gold-light) 60%,
    var(--color-black) 100%
  );
  color: var(--color-gold);
  contain: layout style; /* Performance optimization */
}

.carousel-wrapper {
  overflow: hidden;
  width: 100%;
  position: relative;
  contain: layout; /* Performance optimization */
}

.partner-logos {
  display: flex;
  gap: 2rem;
  transition: transform 0.5s ease;
  will-change: transform; /* Performance optimization */
  contain: layout; /* Performance optimization */
}

.partner-logos img,
.partner-logos picture {
  width: 120px;
  height: auto;
  flex-shrink: 0;
  object-fit: contain;
  filter: grayscale(100%) brightness(0.9);
  transition: filter var(--transition), transform var(--transition);
  contain: layout; /* Performance optimization */
}

.partner-logos picture {
  display: block;
}

.partner-logos picture img {
  width: 100%;
  height: auto;
}

.partner-logos img:hover {
  filter: grayscale(0%) brightness(1);
  transform: scale(1.1);
  cursor: pointer;
}

.partners h2 {
  color: var(--color-dark-gray);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .partner-logos img,
  .partner-logos picture {
    width: 80px;
  }
  
  .partner-logos picture img {
    width: 100%;
  }
}

/* === Benefits Section === */
.benefits {
  background: linear-gradient(
    to bottom,
    var(--color-dark-gray) 0%,
    var(--color-dark-gray) 60%,
    var(--color-gold) 100%
  );
  color: var(--color-white);
  text-align: center;
  padding: 4rem 1rem;
  contain: layout style; /* Performance optimization */
}

.benefits h2 {
  font-size: 2.5rem;
  margin-bottom: 3rem;
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  contain: layout; /* Performance optimization */
}

.benefit-item {
  background-color: rgba(0, 0, 0, 0.5);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  transition: transform var(--transition), box-shadow var(--transition);
  contain: layout style; /* Performance optimization */
}

.benefit-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.benefit-item .icon {
  width: 60px;
  height: auto;
  margin-bottom: 1rem;
  filter: none;
  transition: filter var(--transition), transform var(--transition);
  contain: layout; /* Performance optimization */
}

.benefit-item picture.icon {
  display: block;
}

.benefit-item picture.icon img {
  width: 100%;
  height: auto;
}

.benefit-item:hover .icon {
  color: var(--color-gold-light);
  transform: scale(1.1);
}

.benefit-item h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--color-gold);
}

.benefit-item p {
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Responsive Grid */
@media (max-width: 1024px) {
  .benefits-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .benefits-grid {
    grid-template-columns: 1fr;
  }
}

/* === Call to Action Section === */
.cta-banner {
  background: var(--color-gold);
  color: var(--color-white);
  text-align: center;
  padding: 4rem 1rem;
  contain: layout style; /* Performance optimization */
}

.cta-banner h2 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  color: var(--color-dark-gray);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.cta-banner .btn-primary {
  background: linear-gradient(
    135deg,
    var(--color-gold),
    var(--color-gold-light)
  );
  color: var(--color-dark-gray);
  padding: 1rem 2.5rem;
  border-radius: var(--border-radius);
  font-size: 1.2rem;
  text-transform: uppercase;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.cta-banner .btn-primary:hover {
  background: linear-gradient(
    135deg,
    var(--color-gold-light),
    var(--color-gold)
  );
  transform: scale(1.05);
}

/* === Footer === */
.site-footer {
  background-color: var(--color-black);
  color: var(--color-gold);
  text-align: center;
  padding: 2rem 1rem;
  contain: layout style; /* Performance optimization */
}

.site-footer a {
  color: var(--color-gold);
  font-weight: bold;
}

.site-footer a:hover {
  color: var(--color-gold-light);
  text-decoration: underline;
  cursor: pointer;
}

.site-footer p {
  margin: 0.5rem 0;
}

.break-line {
  display: block;
  margin-top: 0.5rem;
}

/* === Performance Optimizations === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .scroll-down {
    animation: none;
  }
  
  .partner-logos {
    transition: none;
  }
}

/* === Print Styles === */
@media print {
  .site-header,
  .mobile-nav,
  .scroll-down,
  .btn {
    display: none !important;
  }
  
  .hero {
    height: auto;
    padding: 2rem 1rem;
  }
  
  .benefits-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}