:root {
  --bg-page: #f6f8fb;
  --bg-card: #ffffff;
  --bg-soft: #eff3f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border: #dbe3ef;
  --border-strong: #c7d3e5;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --violet-600: #7c3aed;
  --emerald-500: #10b981;
  --shadow-sm: 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 16px 40px rgba(15, 23, 42, 0.1);
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #f8faff 0%, var(--bg-page) 42%, #f3f7ff 100%);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

.section-container {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: #dbeafe;
  color: var(--blue-600);
  font-size: 13px;
  font-weight: 700;
}

.section-title {
  margin-top: 14px;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.14;
}

.section-description {
  margin-top: 14px;
  color: var(--text-secondary);
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  border-bottom: 1px solid rgba(199, 211, 229, 0.65);
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.82);
  transition: box-shadow var(--transition), background-color var(--transition);
}

.nav.scrolled {
  box-shadow: var(--shadow-sm);
  background: rgba(255, 255, 255, 0.94);
}

.nav-container {
  max-width: 1220px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
}

.logo-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(130deg, var(--blue-500), var(--violet-600));
  box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.16);
}

.logo-accent {
  color: var(--blue-500);
}

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

.nav-links a {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 15px;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--blue-600);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mobile-menu-btn {
  display: none;
  width: 38px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-card);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 16px;
  height: 2px;
  border-radius: 1px;
  background: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 68px 0 auto 0;
  z-index: 180;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 16px 24px 22px;
}

.mobile-menu.active {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-menu a {
  font-weight: 600;
  color: var(--text-secondary);
  padding: 10px 12px;
  border-radius: 12px;
}

.mobile-menu a:hover {
  background: #eff6ff;
  color: var(--blue-600);
}

.mobile-menu-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding-top: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  border: 1px solid transparent;
  padding: 11px 18px;
  font-size: 15px;
  font-weight: 700;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition);
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #ffffff;
  background: linear-gradient(140deg, #60a5fa, var(--blue-600));
  box-shadow: 0 14px 26px rgba(37, 99, 235, 0.28);
}

.btn-primary:hover {
  box-shadow: 0 18px 32px rgba(37, 99, 235, 0.34);
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: #f8fbff;
}

.btn-ghost {
  color: var(--text-secondary);
  border-color: var(--border);
  background: #ffffff;
}

.btn-ghost:hover {
  color: var(--blue-600);
  background: #eff6ff;
}

.btn-lg {
  padding: 14px 22px;
  border-radius: 16px;
}

.btn-xl {
  padding: 16px 28px;
  font-size: 16px;
}

.hero {
  position: relative;
  padding: 132px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 999px;
  filter: blur(18px);
  opacity: 0.36;
  animation: float 7s ease-in-out infinite;
}

.blob-1 {
  top: 84px;
  right: 12%;
  width: 280px;
  height: 280px;
  background: #bfdbfe;
}

.blob-2 {
  left: -40px;
  top: 340px;
  width: 220px;
  height: 220px;
  background: #e9d5ff;
  animation-delay: 1.2s;
}

.blob-3 {
  right: 36%;
  bottom: -100px;
  width: 180px;
  height: 180px;
  background: #ccfbf1;
  animation-delay: 2.2s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero-container {
  position: relative;
  z-index: 2;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: start;
}

.hero-content,
.hero-panel {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(199, 211, 229, 0.6);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: 34px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: #ecfeff;
  color: #0f766e;
  font-size: 13px;
  font-weight: 600;
}

.hero-title {
  margin-top: 18px;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.hero-description {
  margin-top: 18px;
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 680px;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-hint {
  margin-top: 20px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  color: var(--text-secondary);
}

.online-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--emerald-500);
  animation: pulse 1.6s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.hero-panel h2 {
  font-size: 24px;
  line-height: 1.2;
  margin-bottom: 18px;
}

.hero-panel ul {
  display: grid;
  gap: 12px;
}

.hero-panel li {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #f8fbff;
  padding: 12px 14px;
  color: var(--text-secondary);
}

.hero-panel-link {
  margin-top: 16px;
}

section {
  padding: 84px 0;
}

.how-grid,
.features-grid,
.audience-grid,
.pricing-grid,
.roadmap-grid,
.comparison-grid {
  display: grid;
  gap: 18px;
}

.how-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.how-card,
.feature-card,
.audience-card,
.pricing-card,
.comparison-card,
.roadmap-card,
.faq-item,
.common-features {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}

.how-card,
.feature-card,
.audience-card,
.comparison-card,
.roadmap-card {
  padding: 24px;
}

.step {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--blue-600);
  font-weight: 800;
  letter-spacing: 0.08em;
  font-size: 13px;
}

.how-card h3,
.feature-card h3,
.audience-card h3,
.comparison-card h3,
.roadmap-card h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.2;
}

.how-card p,
.feature-card p,
.audience-card p,
.comparison-card p {
  color: var(--text-secondary);
}

.feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  margin-bottom: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--blue-600);
  background: #dbeafe;
}

.features-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.library {
  padding-top: 42px;
}

.library-content {
  display: grid;
  gap: 24px;
  grid-template-columns: 1.1fr 0.9fr;
}

.library-text .section-title {
  margin-top: 12px;
  font-size: clamp(28px, 4vw, 40px);
}

.library-benefits {
  margin-top: 24px;
  display: grid;
  gap: 10px;
}

.library-benefits li {
  border-radius: 14px;
  background: #f8fbff;
  border: 1px solid var(--border);
  padding: 12px 14px;
  color: var(--text-secondary);
}

.folder-tree {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: #ffffff;
  box-shadow: var(--shadow-md);
  padding: 18px;
}

.tree-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-radius: 12px;
  padding: 10px 12px;
}

.tree-item.root {
  background: #f1f5f9;
  font-weight: 700;
  margin-bottom: 8px;
}

.tree-item.folder {
  width: 100%;
  border: none;
  background: #eef2ff;
  color: #4338ca;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
}

.tree-item.folder::after {
  content: "▸";
  font-size: 12px;
  transition: transform var(--transition);
}

.tree-item.folder.open::after {
  transform: rotate(90deg);
}

.tree-item.file {
  border: 1px solid var(--border);
  background: #f8fafc;
  margin-top: 8px;
  margin-left: 14px;
  color: var(--text-secondary);
}

.tree-item.shared {
  margin-top: 10px;
  border: 1px solid #d1fae5;
  background: #ecfdf5;
  color: #047857;
}

.tree-badge {
  min-width: 24px;
  height: 24px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  background: #10b981;
  font-weight: 700;
  font-size: 12px;
  animation: pulse 1.8s infinite;
}

.comparison-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.comparison-card ul {
  margin-top: 14px;
  display: grid;
  gap: 8px;
}

.comparison-card li {
  color: var(--text-secondary);
  padding-left: 16px;
  position: relative;
}

.comparison-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 999px;
}

.comparison-card-negative {
  border-color: #fecaca;
  background: #fef2f2;
}

.comparison-card-negative li::before {
  background: #dc2626;
}

.comparison-card-positive {
  border-color: #bfdbfe;
  background: #eff6ff;
}

.comparison-card-positive li::before {
  background: var(--blue-600);
}

.audience-grid,
.pricing-grid,
.roadmap-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.advanced {
  padding-top: 48px;
}

.advanced-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.advanced-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
  padding: 24px;
}

.advanced-card h3 {
  margin-bottom: 12px;
  font-size: 21px;
  line-height: 1.25;
}

.advanced-card ul {
  display: grid;
  gap: 10px;
}

.advanced-card li {
  color: var(--text-secondary);
  padding-left: 16px;
  position: relative;
}

.advanced-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--blue-500);
}

.audience-card .btn {
  margin-top: 16px;
}

.roadmap-status {
  display: inline-flex;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  padding: 6px 12px;
  margin-bottom: 12px;
}

.status-ready {
  color: #065f46;
  background: #d1fae5;
}

.status-planned {
  color: #6d28d9;
  background: #ede9fe;
}

.roadmap-card ul {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.roadmap-card li {
  color: var(--text-secondary);
  padding-left: 18px;
  position: relative;
}

.roadmap-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: #60a5fa;
}

.common-features {
  padding: 16px 18px;
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.common-features span {
  font-weight: 700;
  color: var(--text-primary);
}

.pricing-card {
  padding: 24px;
  position: relative;
}

.pricing-card-featured {
  border-color: #93c5fd;
  box-shadow: 0 18px 36px rgba(37, 99, 235, 0.2);
}

.pricing-badge {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  color: #ffffff;
  background: linear-gradient(140deg, var(--blue-500), var(--violet-600));
}

.pricing-name {
  font-size: 24px;
}

.pricing-description {
  color: var(--text-secondary);
  margin-top: 8px;
}

.pricing-price {
  margin: 18px 0;
  display: inline-flex;
  align-items: flex-end;
  gap: 8px;
}

.price-amount {
  font-size: 42px;
  line-height: 1;
  font-weight: 800;
}

.price-period {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 4px;
}

.pricing-features {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.pricing-features li {
  padding-left: 16px;
  position: relative;
  color: var(--text-secondary);
}

.pricing-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--blue-500);
}

.btn-pricing {
  width: 100%;
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.faq-item {
  padding: 0;
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-size: 18px;
  font-weight: 600;
  padding: 18px 20px;
  position: relative;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 15px;
  font-size: 24px;
  color: var(--blue-600);
}

.faq-item[open] summary::after {
  content: "-";
}

.faq-item p {
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 14px 20px 18px;
}

.cta {
  padding-top: 42px;
}

.cta-container {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  background: linear-gradient(145deg, #dbeafe, #eef2ff);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-xl);
  padding: 44px 28px;
}

.cta-container h2 {
  font-size: clamp(30px, 4.5vw, 42px);
  line-height: 1.15;
}

.cta-container p {
  margin: 14px auto 24px;
  max-width: 640px;
  color: var(--text-secondary);
}

.cta-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.footer {
  margin-top: 88px;
  border-top: 1px solid var(--border);
  background: #f8fbff;
}

.footer-container {
  max-width: 1220px;
  margin: 0 auto;
  padding: 40px 24px 26px;
  display: grid;
  gap: 28px;
  grid-template-columns: 1.2fr 1fr;
}

.footer-brand p {
  margin-top: 14px;
  color: var(--text-secondary);
  max-width: 520px;
}

.footer-email {
  margin-top: 14px;
  display: inline-flex;
  color: var(--blue-600);
  font-weight: 600;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.footer-column h4 {
  margin-bottom: 12px;
  font-size: 15px;
}

.footer-column a {
  display: block;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.footer-column a:hover {
  color: var(--blue-600);
}

.footer-bottom {
  border-top: 1px solid var(--border);
}

.footer-bottom-content {
  max-width: 1220px;
  margin: 0 auto;
  padding: 16px 24px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
}

.cookie-banner {
  position: fixed;
  left: 20px;
  right: 20px;
  bottom: 20px;
  max-width: 860px;
  margin: 0 auto;
  border-radius: 16px;
  background: #0f172a;
  color: #e2e8f0;
  border: 1px solid #1e293b;
  z-index: 300;
  box-shadow: var(--shadow-md);
}

.cookie-content {
  padding: 16px 16px 14px;
}

.cookie-content a {
  color: #93c5fd;
}

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.btn-cookie-settings,
.btn-cookie-secondary,
.btn-cookie-primary,
.cookie-close {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 9px 12px;
  background: #1e293b;
  color: #e2e8f0;
  cursor: pointer;
  font-weight: 600;
}

.btn-cookie-primary {
  background: var(--blue-600);
  color: #ffffff;
}

.btn-cookie-secondary {
  border-color: #334155;
}

.cookie-settings {
  border-top: 1px solid #334155;
  padding: 14px 16px 16px;
}

.cookie-settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cookie-close {
  width: 32px;
  height: 32px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.cookie-options {
  margin: 12px 0;
  display: grid;
  gap: 10px;
}

.cookie-option {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.cookie-option span {
  color: #94a3b8;
  font-size: 14px;
}

.reveal-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal-item.revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .nav-links,
  .nav-actions {
    display: none;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  .hero-container,
  .library-content,
  .how-grid,
  .features-grid,
  .advanced-grid,
  .comparison-grid,
  .audience-grid,
  .pricing-grid,
  .roadmap-grid,
  .footer-container {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: clamp(28px, 8vw, 38px);
  }

  .hero-content,
  .hero-panel {
    padding: 24px;
  }

  .footer-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .section-container,
  .hero-container,
  .nav-container,
  .footer-container,
  .footer-bottom-content {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero {
    padding-top: 104px;
  }

  .section-header {
    margin-bottom: 30px;
  }

  section {
    padding: 62px 0;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }

  .footer-bottom-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .mobile-menu-actions {
    grid-template-columns: 1fr;
  }

  .cookie-banner {
    left: 12px;
    right: 12px;
    bottom: 12px;
  }

  .cta-actions .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal-item {
    opacity: 1;
    transform: none;
  }
}