/* ===$ Navigation $=== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  backdrop-filter: blur(10px);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--c-text);
  cursor: pointer;
}

.nav-brand .material-symbols-rounded {
  font-size: 2rem;
  color: var(--c-secondary);
}

.nav-icon {
  width: 32px;
  height: 32px;
  background-image: url("../../icons/botbotbot.svg");
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
}

.nav-menu {
  display: none;
  list-style: none;
  gap: var(--space-md);
  align-items: center;
}

.nav-menu li a {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--c-text-secondary);
  transition: color var(--transition-fast);
  padding: var(--space-sm) var(--space-sm);
  border-radius: var(--radius-sm);
}

.nav-menu li a:hover {
  color: var(--c-text);
  background: var(--c-surface);
}

.nav-menu li a.btn-primary {
  color: var(--c-text);
  background: var(--gradient-primary);
  padding: var(--space-sm) var(--space-xl);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-xs) var(--space-sm);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  color: var(--c-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-switcher:hover {
  background: var(--c-surface-hover);
  border-color: var(--c-primary);
}

.lang-switcher .material-symbols-rounded {
  font-size: 1.2rem;
}

.lang-text {
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  color: var(--c-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--c-surface-hover);
  border-color: var(--c-primary);
}

.nav-menu.active {
  display: flex;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, rgba(15, 15, 35, 0.98) 0%, rgba(25, 25, 55, 0.98) 100%);
  backdrop-filter: blur(20px);
  padding: var(--space-2xl);
  gap: var(--space-lg);
  z-index: 9999;
  animation: menuFadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-menu.active::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0, 136, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.nav-menu.active li {
  width: 100%;
  max-width: 400px;
  opacity: 0;
  animation: menuItemSlide 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  position: relative;
  z-index: 1;
}

.nav-menu.active li:nth-child(1) {
  animation-delay: 0.1s;
}
.nav-menu.active li:nth-child(2) {
  animation-delay: 0.15s;
}
.nav-menu.active li:nth-child(3) {
  animation-delay: 0.2s;
}
.nav-menu.active li:nth-child(4) {
  animation-delay: 0.25s;
}
.nav-menu.active li:nth-child(5) {
  animation-delay: 0.3s;
}
.nav-menu.active li:nth-child(6) {
  animation-delay: 0.35s;
}
.nav-menu.active li:nth-child(7) {
  animation-delay: 0.4s;
}

.nav-menu.active li a {
  display: block;
  width: 100%;
  text-align: center;
  padding: var(--space-lg) var(--space-xl);
  font-size: var(--font-size-xl);
  font-weight: 600;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.nav-menu.active li a::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s;
}

.nav-menu.active li a:hover::before {
  left: 100%;
}

.nav-menu.active li a:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--c-primary);
  transform: translateX(10px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.nav-menu.active li a.btn-primary {
  background: var(--gradient-primary);
  border: none;
  box-shadow: 0 4px 12px rgba(0, 255, 136, 0.3);
}

.nav-menu.active li a.btn-primary:hover {
  transform: translateX(10px) scale(1.05);
  box-shadow: 0 8px 20px rgba(0, 255, 136, 0.5);
}

/* Close button in menu */
.menu-toggle.active {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 10000;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.menu-toggle.active:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: var(--c-primary);
  transform: rotate(90deg);
}

/* ===$ Hero Section $=== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  overflow: hidden;
}

.hero-bg-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.5;
  background-image: url("../../img/bgr.svg");
  background-position: 20% 50%;
  background-size: cover;
  background-repeat: no-repeat;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0%;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.4;
  background-image: url("../../img/pan-code.jpg");
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  transition: opacity 0.8s ease-in-out;
}

.hero-container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-content {
  text-align: center;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

.hero-title span {
  display: block;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--c-text-secondary);
  margin-bottom: var(--space-xl);
}

.hero-info {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  margin-bottom: var(--space-xl);
}

.info-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  color: var(--c-text-secondary);
}

.info-item .material-symbols-rounded {
  font-size: 1.5rem;
  color: var(--c-primary);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

.hero-visual {
  display: none;
  align-items: center;
  justify-content: center;
}

.robot-illustration {
  position: absolute;
  width: 60%;
  height: 20rem;
  background-image: url("../../img/1d1d4378-c3c2-404d-a4e3-ee548d170a96.jpg");
  border-radius: var(--radius-xl);
  border: 2px solid var(--c-border);
  position: relative;
  animation: float 3s ease-in-out infinite;
}

/* ===$ About Section $=== */
.about {
  background: var(--c-background-secondary);
}

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

.about-text p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
}

.about-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.feature-card {
  padding: var(--space-xl);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--c-primary);
  box-shadow: var(--shadow-lg);
}

.feature-card .material-symbols-rounded {
  font-size: 3rem;
  color: var(--c-primary);
  margin-bottom: var(--space-md);
}

.feature-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: var(--font-size-base);
  color: var(--c-text-secondary);
}

/* ===$ Challenges Section $=== */
.challenges-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

.challenge-card {
  padding: var(--space-xl);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.challenge-card:hover {
  transform: translateY(-5px);
  border-color: var(--c-secondary);
  box-shadow: var(--shadow-lg);
}

.challenge-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.challenge-icon .material-symbols-rounded {
  font-size: 2rem;
  color: var(--c-text);
}

.challenge-card h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
}

.challenge-card p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
}

.challenge-tags {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.tag {
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--c-border);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--c-text-secondary);
}

/* ===$ Prizes Section $=== */
.prizes {
  background: var(--c-background-secondary);
  position: relative;
  overflow: hidden;
}

.prizes-split-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.prizes-left {
  flex: 1;
  position: relative;
  z-index: 1;
}

.prizes-right {
  display: none;
}

.prizes-wrapper {
  position: relative;
  z-index: 1;
}

.prizes-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  max-width: 1200px;
  margin: 0 auto;
}

.prize-card {
  padding: var(--space-lg);
  border: 2px solid var(--c-border);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.prize-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.prize-rank {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.prize-rank .material-symbols-rounded {
  font-size: 1.5rem;
}

.prize-card h3 {
  font-size: var(--font-size-lg);
  margin: 0;
}

.prize-card p {
  color: var(--c-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

.prize-gold {
  border-color: #ffd700;
}

.prize-gold .prize-rank {
  color: #ffd700;
}

.prize-silver {
  border-color: #c0c0c0;
}

.prize-silver .prize-rank {
  color: #c0c0c0;
}

.prize-bronze {
  border-color: #cd7f32;
}

.prize-bronze .prize-rank {
  color: #cd7f32;
}

.prize-all {
  border-color: var(--c-primary);
}

.prize-all .prize-rank {
  color: var(--c-primary);
}

.prize-list {
  list-style: none;
  text-align: left;
  margin: var(--space-sm) 0 0 0;
  padding: 0;
}

.prize-list li {
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--c-text-secondary);
  border-bottom: 1px solid var(--c-border);
}

.prize-list li:last-child {
  border-bottom: none;
}

/* ===$ Sponsors Section $=== */
.sponsers {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.3;
  background-image: url("../../img/bgr.svg");
  background-position: 50%;
  background-size: cover;
  background-repeat: no-repeat;
}

.sponsor-tier {
  margin-bottom: var(--space-2xl);
}

.tier-title {
  text-align: center;
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-lg);
  color: var(--c-text-secondary);
}

.sponsor-grid {
  display: flex;
  flex-direction: row;
  flex-direction: 1;
  width: 100%;
  gap: 2%;
  flex-wrap: wrap;
}

.sponsor-card {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  text-align: center;
  font-weight: 600;
  color: var(--c-text-secondary);
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
}

.sponsor-card img {
  max-width: 100%;
  max-height: 50px;
  width: auto;
  height: auto;
  object-fit: contain;
  transition: filter var(--transition-base);
}

.sponsor-card:hover img {
  filter: grayscale(0%) brightness(1);
}

.sponsor-card:hover {
  border-color: var(--c-primary);
  transform: translateY(-3px);
}

.become-sponsor {
  text-align: center;
  padding: var(--space-xl);
  margin-top: var(--space-2xl);
}

.become-sponsor p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
}

/* ===$ FAQ Section $=== */
.faq {
  background: var(--c-background-secondary);
}

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

.faq-item {
  margin-bottom: var(--space-md);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  background: transparent;
  border: none;
  color: var(--c-text);
  font-family: var(--font-family);
  font-size: var(--font-size-lg);
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.faq-question:hover {
  color: var(--c-primary);
}

.faq-question .material-symbols-rounded {
  transition: transform var(--transition-base);
}

.faq-item.active .faq-question .material-symbols-rounded {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer p {
  padding: 0 var(--space-lg) var(--space-lg);
  font-size: var(--font-size-base);
  color: var(--c-text-secondary);
  line-height: 1.8;
}

/* ===$ Footer $=== */
.footer {
  background: var(--c-background-tertiary);
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.footer-brand .material-symbols-rounded {
  font-size: 2rem;
  color: var(--c-secondary);
}

.footer-brand p {
  font-size: var(--font-size-base);
  color: var(--c-text-muted);
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.footer-section h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
  color: var(--c-text);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--space-sm);
}

.footer-section li a,
.footer-section li span {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--c-text-muted);
  transition: color var(--transition-fast);
}

.footer-section li a:hover {
  color: var(--c-primary);
}

.footer-section .material-symbols-rounded {
  font-size: 1rem;
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--c-border);
  text-align: center;
}

.footer-bottom p {
  font-size: var(--font-size-sm);
  color: var(--c-text-muted);
}