/* ===== LLMQuests Landing – Dark, Teal, Futuristic ===== */
:root {
  --bg-dark: #0a0e14;
  --bg-card: #0f1419;
  --bg-elevated: #151b23;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --teal: #2dd4bf;
  --teal-dim: #14b8a6;
  --teal-glow: rgba(45, 212, 191, 0.35);
  --teal-subtle: rgba(45, 212, 191, 0.12);
  --border: rgba(45, 212, 191, 0.2);
  --gradient-teal: linear-gradient(
    135deg,
    #0d9488 0%,
    #2dd4bf 50%,
    #5eead4 100%
  );
  --gradient-bg-1: radial-gradient(
    ellipse 80% 50% at 20% 20%,
    rgba(13, 148, 136, 0.25) 0%,
    transparent 50%
  );
  --gradient-bg-2: radial-gradient(
    ellipse 60% 40% at 80% 80%,
    rgba(45, 212, 191, 0.15) 0%,
    transparent 50%
  );
  --gradient-bg-3: radial-gradient(
    ellipse 50% 30% at 50% 100%,
    rgba(20, 184, 166, 0.2) 0%,
    transparent 50%
  );
  --font-sans: "Outfit", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --nav-height: 72px;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  background-image: var(--gradient-bg-1), var(--gradient-bg-2),
    var(--gradient-bg-3);
  background-size: 100% 100%;
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* ----- Animated gradient orbs ----- */
.gradient-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
  animation: orbFloat 15s ease-in-out infinite;
}

.gradient-orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(13, 148, 136, 0.4) 0%,
    transparent 70%
  );
  top: -200px;
  left: -100px;
  animation-delay: 0s;
}

.gradient-orb-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(
    circle,
    rgba(45, 212, 191, 0.25) 0%,
    transparent 70%
  );
  top: 40%;
  right: -150px;
  animation-delay: -5s;
}

.gradient-orb-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(
    circle,
    rgba(20, 184, 166, 0.2) 0%,
    transparent 70%
  );
  bottom: -100px;
  left: 30%;
  animation-delay: -10s;
}

@keyframes orbFloat {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(30px, -20px) scale(1.05);
  }
  66% {
    transform: translate(-20px, 30px) scale(0.95);
  }
}

/* ----- Grid overlay ----- */
.grid-overlay {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(
      rgba(45, 212, 191, 0.03) 1px,
      transparent 1px
    ),
    linear-gradient(90deg, rgba(45, 212, 191, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ----- Layout ----- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  font-size: 1.2rem;
  transition: color var(--transition);
}

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

.logo-icon {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--teal);
  background: var(--teal-subtle);
}

.nav-cta {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--bg-dark);
  background: var(--teal);
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition),
    box-shadow var(--transition);
}

.nav-cta:hover {
  background: #5eead4;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--teal-glow);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text);
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: var(--transition);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 10px;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  color: var(--bg-dark);
  background: var(--gradient-teal);
  box-shadow: 0 4px 24px var(--teal-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--teal-glow);
}

.btn-ghost {
  color: var(--teal);
  background: transparent;
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: var(--teal-subtle);
  border-color: var(--teal);
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 48px;
  line-height: 1.2;
}

.section-title .section-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 8px;
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
}

.hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--teal);
  background: var(--teal-subtle);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero-title .line {
  display: block;
}

.hero-title .highlight {
  background: var(--gradient-teal);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%,
  100% {
    filter: brightness(1);
  }
  50% {
    filter: brightness(1.2);
  }
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  gap: 48px;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--teal);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.animate-fade-in {
  animation: fadeInUp 0.8s ease-out forwards;
}

.hero-title .line:nth-child(1) {
  animation: fadeInUp 0.6s ease-out 0.1s forwards;
  opacity: 0;
}
.hero-title .line:nth-child(2) {
  animation: fadeInUp 0.6s ease-out 0.25s forwards;
  opacity: 0;
}
.hero-subtitle {
  animation: fadeInUp 0.6s ease-out 0.4s forwards;
  opacity: 0;
}
.hero-actions {
  animation: fadeInUp 0.6s ease-out 0.55s forwards;
  opacity: 0;
}
.animate-float {
  animation: fadeInUp 0.6s ease-out 0.7s forwards;
  opacity: 0;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform var(--transition), border-color var(--transition),
    box-shadow var(--transition);
}

.about-card:hover {
  transform: translateY(-4px);
  border-color: var(--teal);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.about-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  color: var(--teal);
}

.about-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}

.about-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-teal);
  transform: scaleY(0);
  transition: transform var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--teal);
}

.feature-card:hover::before {
  transform: scaleY(1);
}

.feature-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--teal);
  opacity: 0.8;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===== How it works ===== */
.steps {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 640px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), transform var(--transition);
}

.step:hover {
  border-color: var(--teal);
  transform: translateX(8px);
}

.step-marker {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--bg-dark);
  background: var(--gradient-teal);
  border-radius: 10px;
}

.step-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.step-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== Compete ===== */
.compete-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.terminal-mock {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
}

.terminal-dot:nth-child(1) {
  background: #ef4444;
}
.terminal-dot:nth-child(2) {
  background: #eab308;
}
.terminal-dot:nth-child(3) {
  background: #22c55e;
}

.terminal-title {
  margin-left: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.terminal-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.8;
}

.terminal-body code {
  display: block;
}

.terminal-body .teal {
  color: var(--teal);
}

.terminal-body .muted {
  color: var(--text-muted);
}

.compete-text p {
  color: var(--text-muted);
  margin-bottom: 20px;
  font-size: 1rem;
}

.compete-list {
  list-style: none;
}

.compete-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  color: var(--text);
}

.compete-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--teal);
  font-weight: 600;
}

/* ===== CTA ===== */
.cta {
  padding: 120px 0;
}

.cta-box {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
  padding: 56px 48px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-teal);
}

.cta-box h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-box > p {
  color: var(--text-muted);
  margin-bottom: 28px;
}

.cta-form {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 16px;
}

.cta-form input {
  flex: 1;
  min-width: 220px;
  padding: 14px 20px;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--text);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color var(--transition);
}

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

.cta-form input:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-subtle);
}

.cta-note {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.cta-form-wrap {
  transition: opacity 0.35s ease-out;
}

.cta-form-hidden {
  display: none !important;
}

/* Button loading state */
#cta-submit {
  position: relative;
}

#cta-submit .cta-btn-spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(10, 14, 20, 0.3);
  border-top-color: var(--bg-dark);
  border-radius: 50%;
  animation: cta-spin 0.7s linear infinite;
}

#cta-submit.cta-btn-loading .cta-btn-text {
  visibility: hidden;
  position: absolute;
}

#cta-submit.cta-btn-loading .cta-btn-spinner {
  display: inline-block;
  position: absolute;
}

@keyframes cta-spin {
  to {
    transform: rotate(360deg);
  }
}

/* Success state */
.cta-success {
  text-align: center;
  padding: 24px 0 0;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.cta-success-visible {
  opacity: 1;
  transform: translateY(0);
}

.cta-success-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: 20px;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--bg-dark);
  background: var(--gradient-teal);
  border-radius: 50%;
  box-shadow: 0 4px 24px var(--teal-glow);
  opacity: 0;
  transform: scale(0.4);
  transition: opacity 0.5s cubic-bezier(0.34, 1.56, 0.64, 1),
    transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.cta-success-animate .cta-success-icon {
  opacity: 1;
  transform: scale(1);
}

.cta-success-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease-out 0.2s, transform 0.4s ease-out 0.2s;
}

.cta-success-animate .cta-success-title {
  opacity: 1;
  transform: translateY(0);
}

.cta-success-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 360px;
  margin: 0 auto;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease-out 0.35s, transform 0.4s ease-out 0.35s;
}

.cta-success-animate .cta-success-text {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Footer ===== */
.footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 32px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--teal);
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Scroll-triggered animations ===== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-card.visible:nth-child(1) {
  transition-delay: 0s;
}
.feature-card.visible:nth-child(2) {
  transition-delay: 0.1s;
}
.feature-card.visible:nth-child(3) {
  transition-delay: 0.2s;
}
.feature-card.visible:nth-child(4) {
  transition-delay: 0.3s;
}
.about-card.visible:nth-child(1) {
  transition-delay: 0s;
}
.about-card.visible:nth-child(2) {
  transition-delay: 0.1s;
}
.about-card.visible:nth-child(3) {
  transition-delay: 0.2s;
}
.step.visible:nth-child(1) {
  transition-delay: 0s;
}
.step.visible:nth-child(2) {
  transition-delay: 0.08s;
}
.step.visible:nth-child(3) {
  transition-delay: 0.16s;
}
.step.visible:nth-child(4) {
  transition-delay: 0.24s;
}

/* ===== Mobile ===== */
@media (max-width: 768px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .navbar.open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    padding: 24px;
    gap: 8px;
    border-bottom: 1px solid var(--border);
  }

  .navbar.open .nav-cta {
    display: inline-block;
    position: absolute;
    top: calc(var(--nav-height) + 200px);
    left: 24px;
    right: 24px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }

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

  .cta-form {
    flex-direction: column;
  }

  .cta-form input {
    min-width: 100%;
  }

  .footer-top {
    flex-direction: column;
    align-items: flex-start;
  }
}