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

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(180deg, #0a0a1f 0%, #000000 100%);
  color: #ffffff;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 40px;
  flex: 1;
}

/* Hero Section */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 40px;
  position: relative;
}

.logo-container {
  position: relative;
  width: 280px;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0px;
}

.logo-container::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(138, 96, 255, 0.9) 0%, rgba(138, 96, 255, 0.6) 20%, rgba(138, 96, 255, 0.3) 40%, transparent 70%);
  filter: blur(60px);
  z-index: -1;
  pointer-events: none;
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.8;
  }
}

.logo {
  position: relative;
  width: 200px;
  height: 200px;
  z-index: 1;
}

.hero-content {
  max-width: 900px;
}

.hero-title {
  font-size: 64px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 24px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.5;
}

.setup-requirement {
  margin-bottom: 30px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex-wrap: wrap;
}

.inline-setup-link {
  background: none;
  border: none;
  color: rgba(138, 96, 255, 0.9);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
  font-family: inherit;
}

.inline-setup-link:hover {
  color: rgba(138, 96, 255, 1);
}

/* Content Section */
.content-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 60px;
  max-width: 900px;
  margin: 0 auto;
}

.description {
  max-width: 650px;
}

.description p {
  font-size: 18px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.75);
}

.cta-section {
  margin-top: 1rem;
  text-align: center;
}

.cta-button {
  display: inline-block;
  padding: 20px 60px;
  background-image: url('../images/button_bg.webp');
  background-size: cover;
  background-position: center;
  color: #ffffff;
  text-decoration: none;
  border-radius: 50px;
  font-size: 24px;
  font-weight: 600;
  position: relative;
  transition: all 0.3s ease;
  margin-bottom: 16px;
  box-shadow:
    0 8px 32px rgba(139, 92, 246, 0.4),
    inset 0 0 0 1px rgba(255, 255, 255, 0.35);
  border: none;
}

.cta-button::after {
  content: '';
  position: absolute;
  inset: -30px;
  border-radius: 50px;
  background: radial-gradient(ellipse, rgba(139, 92, 246, 0.5) 0%, rgba(99, 102, 241, 0.3) 40%, transparent 70%);
  filter: blur(30px);
  opacity: 0.7;
  z-index: -1;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow:
    0 12px 48px rgba(139, 92, 246, 0.6),
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.5);
}

.cta-button:hover::after {
  opacity: 1;
}

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

.install-note {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.5);
}

/* Setup Guide Section */
.setup-guide {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.5s ease, opacity 0.4s ease, margin 0.5s ease;
  margin: 0;
  width: 100%;
}

.setup-guide.visible {
  max-height: 2000px;
  opacity: 1;
  margin: 34px 0;
}

.setup-guide-content {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 40px;
  text-align: left;
}

.setup-guide-title {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 32px;
  text-align: center;
  color: #ffffff;
}

.setup-step {
  margin-bottom: 32px;
}

.setup-step:last-of-type {
  margin-bottom: 24px;
}

.step-number {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.95);
}

.step-list {
  list-style: none;
  padding-left: 0;
}

.step-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  font-size: 16px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.75);
}

.step-list li::before {
  content: '•';
  position: absolute;
  left: 12px;
  color: rgba(138, 96, 255, 0.8);
  font-size: 20px;
}

.step-list li a {
  color: rgba(138, 96, 255, 0.9);
  text-decoration: none;
  transition: color 0.2s;
  word-break: break-all;
}

.step-list li a:hover {
  color: rgba(138, 96, 255, 1);
  text-decoration: underline;
}

.step-list li strong {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 600;
}

.setup-note {
  margin-top: 24px;
  padding: 20px;
  background: rgba(138, 96, 255, 0.08);
  border: 1px solid rgba(138, 96, 255, 0.2);
  border-radius: 12px;
}

.setup-note p {
  font-size: 15px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

.setup-note strong {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 600;
}

/* Footer */
.footer {
  text-align: center;
  padding: 40px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.3);
}

.footer a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  transition: color 0.2s;
}

.footer a:hover {
  color: rgba(255, 255, 255, 0.8);
}

/* Responsive */
@media (max-width: 1024px) {
  .container {
    padding: 50px 40px;
  }

  .hero {
    margin-bottom: 32px;
  }

  .logo-container {
    width: 220px;
    height: 220px;
  }

  .logo-container::before {
    width: 460px;
    height: 460px;
  }

  .logo {
    width: 155px;
    height: 155px;
  }

  .hero-title {
    font-size: 52px;
  }

  .hero-subtitle {
    font-size: 22px;
  }

  .content-section {
    gap: 50px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 45px 24px;
  }

  .hero {
    margin-bottom: 32px;
  }

  .logo-container {
    width: 210px;
    height: 210px;
  }

  .logo-container::before {
    width: 440px;
    height: 440px;
  }

  .logo {
    width: 145px;
    height: 145px;
  }

  .hero-title {
    font-size: 46px;
  }

  .hero-subtitle {
    font-size: 20px;
  }

  .content-section {
    gap: 38px;
  }

  .description p {
    font-size: 17px;
  }

  .cta-button {
    padding: 15px 46px;
    font-size: 20px;
    width: 100%;
    max-width: 320px;
  }
}

@media (max-width: 767px) and (min-width: 481px) {
  .container {
    padding: 45px 24px;
  }

  .hero {
    margin-bottom: 36px;
  }

  .logo-container {
    width: 195px;
    height: 195px;
  }

  .logo-container::before {
    width: 420px;
    height: 420px;
  }

  .logo {
    width: 140px;
    height: 140px;
  }

  .hero-title {
    font-size: 44px;
  }

  .hero-subtitle {
    font-size: 19px;
  }

  .setup-requirement {
    font-size: 13px;
    margin-bottom: 16px;
  }

  .inline-setup-link {
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 40px 24px;
  }

  .hero {
    margin-bottom: 32px;
  }

  .logo-container {
    width: 180px;
    height: 180px;
  }

  .logo-container::before {
    width: 360px;
    height: 360px;
  }

  .logo {
    width: 115px;
    height: 115px;
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .setup-requirement {
    font-size: 12px;
    margin-bottom: 20px;
  }

  .inline-setup-link {
    font-size: 12px;
  }

  .description p {
    font-size: 14px;
  }

  .cta-button {
    font-size: 19px;
    padding: 14px 36px;
  }

  .setup-guide-content {
    padding: 24px;
  }

  .setup-guide-title {
    font-size: 24px;
    margin-bottom: 24px;
  }

  .step-number {
    font-size: 18px;
  }

  .step-list li {
    font-size: 14px;
    padding-left: 24px;
  }

  .step-list li::before {
    left: 8px;
  }

  .setup-note {
    padding: 16px;
  }

  .setup-note p {
    font-size: 13px;
  }
}