:root {
  --primary: #1E3A8A;
  --primary-light: #3B82F6;
  --primary-dark: #172554;
  --accent: #10B981;
  --accent-hover: #059669;
  --bg-main: #F8FAFC;
  --bg-card: #FFFFFF;
  --text-main: #0F172A;
  --text-muted: #64748B;
  --border: #E2E8F0;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

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

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo svg {
  display: block;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--primary);
}

.brand-badge {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  border: none;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
}

.btn-success {
  background: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-secondary {
  background: #FFFFFF;
  color: var(--text-main);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: #F1F5F9;
  border-color: #CBD5E1;
}

/* Hero Section */
.hero-section {
  padding: 80px 0 60px;
  text-align: center;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: #EFF6FF;
  border: 1px solid #DBEAFE;
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--primary-light);
  margin-bottom: 24px;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 40px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

/* Download Card */
.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-xl);
  text-align: left;
}

.download-card-body {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 28px;
}

.os-icon {
  background: #F0F9FF;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid #E0F2FE;
  flex-shrink: 0;
}

.download-heading {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 4px;
}

.download-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.release-quick-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.release-quick-meta strong {
  color: var(--text-main);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}

.integrity-banner {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.integrity-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Features */
.features-section {
  padding: 80px 0;
  background: #FFFFFF;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 800;
  color: var(--primary-light);
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-main);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  border-color: #CBD5E1;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.icon-blue { background: #EFF6FF; color: #2563EB; }
.icon-emerald { background: #ECFDF5; color: #059669; }
.icon-purple { background: #FAF5FF; color: #7C3AED; }
.icon-amber { background: #FFFBEB; color: #D97706; }
.icon-rose { background: #FFF1F2; color: #E11D48; }
.icon-cyan { background: #ECFEFF; color: #0891B2; }

.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Releases */
.releases-section {
  padding: 80px 0;
}

.releases-container {
  max-width: 860px;
  margin: 0 auto;
}

.release-item {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.release-item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--border);
  padding-bottom: 18px;
  margin-bottom: 20px;
}

.release-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.badge-version {
  background: var(--primary);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
  padding: 4px 10px;
  border-radius: 6px;
}

.badge-stable {
  background: #ECFDF5;
  color: #059669;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid #A7F3D0;
}

.release-name {
  font-size: 1.15rem;
  font-weight: 800;
}

.release-date {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.release-content h4 {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.release-content ul {
  list-style: none;
}

.release-content li {
  font-size: 0.88rem;
  color: #334155;
  margin-bottom: 10px;
  position: relative;
  padding-left: 20px;
}

.release-content li::before {
  content: "•";
  color: var(--primary-light);
  font-weight: bold;
  font-size: 1.2rem;
  position: absolute;
  left: 0;
  top: -2px;
}

.release-content code {
  font-family: 'JetBrains Mono', monospace;
  background: #F1F5F9;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.8rem;
}

/* Specs */
.specs-section {
  padding: 80px 0;
  background: #FFFFFF;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.spec-card {
  background: var(--bg-main);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.spec-card h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}

.spec-card p {
  font-size: 0.92rem;
  color: var(--text-main);
  font-weight: 600;
}

/* Support */
.support-section {
  padding: 80px 0;
}

.support-card {
  max-width: 860px;
  margin: 0 auto;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.support-title {
  font-size: 1.7rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.support-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 30px;
}

.support-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  background: var(--bg-main);
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.contact-item {
  display: flex;
  flex-direction: column;
}

.contact-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.contact-value {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
}

.contact-link {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--primary-light);
  text-decoration: none;
}

.contact-link:hover {
  text-decoration: underline;
}

/* Footer */
.site-footer {
  background: var(--primary-dark);
  color: #94A3B8;
  padding: 32px 0;
  font-size: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-credit {
  font-size: 0.8rem;
  color: #64748B;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.1rem;
  }
  .nav-links {
    display: none;
  }
  .download-card-body {
    flex-direction: column;
  }
  .release-item-header {
    flex-direction: column;
    gap: 12px;
  }
}

/* Floating Download Toast */
.download-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #FFFFFF;
  border: 1px solid #10B981;
  box-shadow: 0 10px 25px -5px rgba(16, 185, 129, 0.25), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  z-index: 1000;
  transform: translateY(120%);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  max-width: 420px;
}

.download-toast.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.download-toast-content {
  display: flex;
  align-items: center;
  gap: 14px;
}

.download-toast-icon {
  background: #ECFDF5;
  padding: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.download-toast-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 2px;
}

.download-toast-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Alternate Download Actions */
.download-alt-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 14px;
}

.link-alt-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-light);
  text-decoration: none;
  transition: color 0.15s ease;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: rgba(59, 130, 246, 0.06);
}

.link-alt-download:hover {
  color: var(--primary-dark);
  background: rgba(59, 130, 246, 0.12);
}

/* One-Click PowerShell Safe Install Box */
.powershell-card {
  margin-top: 24px;
  background: #0F172A;
  border: 1px solid #1E293B;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  text-align: left;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
}

.powershell-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.powershell-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  color: #38BDF8;
}

.powershell-badge {
  font-size: 0.7rem;
  background: rgba(16, 185, 129, 0.2);
  color: #34D399;
  padding: 2px 8px;
  border-radius: 9999px;
  font-weight: 600;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.powershell-cmd-box {
  display: flex;
  align-items: center;
  background: #020617;
  border: 1px solid #334155;
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  gap: 12px;
}

.powershell-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.8rem;
  color: #F1F5F9;
  flex: 1;
  overflow-x: auto;
  white-space: nowrap;
}

.btn-copy-cmd {
  background: #2563EB;
  color: #FFFFFF;
  border: none;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s ease;
  flex-shrink: 0;
}

.btn-copy-cmd:hover {
  background: #1D4ED8;
}

.powershell-desc {
  margin-top: 8px;
  font-size: 0.75rem;
  color: #94A3B8;
  line-height: 1.4;
}

/* SmartScreen Guide Card */
.smartscreen-guide {
  margin-top: 24px;
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  text-align: left;
}

.smartscreen-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 0.88rem;
  color: #1E40AF;
  margin-bottom: 8px;
}

.smartscreen-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 10px;
}

.smartscreen-step-box {
  background: #FFFFFF;
  border: 1px solid #DBEAFE;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
}

.smartscreen-step-num {
  font-weight: 800;
  font-size: 0.75rem;
  color: #2563EB;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.smartscreen-step-text {
  font-size: 0.8rem;
  color: #1E293B;
  line-height: 1.4;
}