:root {
  --bg-color: #F5F5F7;
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --accent-color: #7B68EE;
  --divider-color: rgba(0, 0, 0, 0.05);
  --font-sans: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
}

* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  font-family: var(--font-sans);
  color: var(--text-primary);
  line-height: 1.5;
}

h1, h2, h3, h4 {
  font-weight: 700;
  margin-top: 0;
  color: var(--text-primary);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent-color);
}

/* ── Shell ── */
.site-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
}

.main-column {
  max-width: 896px;
  margin: 0 auto;
  width: 100%;
  border-left: 1px solid var(--divider-color);
  border-right: 1px solid var(--divider-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

/* ── Topbar ── */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 245, 247, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--divider-color);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 7px;
  object-fit: contain;
}

.brand-name {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--accent-color);
  opacity: 1;
}

.nav-links a.is-active {
  color: var(--accent-color);
}

/* Language Dropdown */
.lang-dropdown {
  position: relative;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  font-family: var(--font-mono);
  transition: all 0.2s;
}

.lang-toggle:hover,
.lang-dropdown.is-open .lang-toggle {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

.chevron-icon {
  opacity: 0.6;
  transition: transform 0.2s;
}

.lang-dropdown.is-open .chevron-icon {
  transform: rotate(180deg);
}

.lang-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 6px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 8px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
  padding: 6px;
  display: none;
  flex-direction: column;
  min-width: 120px;
  z-index: 1000;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.lang-dropdown.is-open .lang-menu {
  display: flex;
  animation: menuFadeIn 0.15s ease-out;
}

@keyframes menuFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.lang-menu button {
  background: none;
  border: none;
  text-align: left;
  padding: 8px 12px;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--text-primary);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.1s;
}

.lang-menu button:hover {
  background: rgba(0, 0, 0, 0.05);
}

.lang-menu button.is-active {
  font-weight: 600;
  color: var(--accent-color);
  background: rgba(123, 104, 238, 0.08);
}

/* ── Hero ── */
.hero {
  padding: 100px 32px 80px;
  border-bottom: 1px solid var(--divider-color);
}

.hero-content {
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--divider-color);
  background: #fff;
  border-radius: 3px;
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 32px;
}

.hero-badge .pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-color);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-size: clamp(48px, 8vw, 80px);
  line-height: 0.92;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
  font-weight: 700;
}

.hero-subtitle {
  font-size: 15px;
  color: #666;
  font-family: var(--font-mono);
  line-height: 1.7;
  margin-bottom: 40px;
  max-width: 520px;
  letter-spacing: 0.02em;
}

.hero-subtitle strong {
  color: var(--text-primary);
}

.cta-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  border-bottom: 1px solid var(--text-primary);
  padding-bottom: 2px;
  transition: all 0.2s;
}

.btn-link:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
  opacity: 1;
}

.btn-link svg {
  transition: transform 0.2s;
}

.btn-link:hover svg {
  transform: translateX(3px);
}

.btn-solid {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border: 1px solid var(--text-primary);
  background: var(--text-primary);
  color: #fff;
  border-radius: 3px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: all 0.3s;
  cursor: pointer;
}

.btn-solid:hover {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: #fff;
  opacity: 1;
}

.btn-solid.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border: 1px solid var(--text-primary);
  background: transparent;
  color: var(--text-primary);
  border-radius: 3px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: all 0.3s;
  cursor: pointer;
}

.btn-outline:hover {
  background: var(--text-primary);
  color: #fff;
  opacity: 1;
}

.btn-tag {
  font-size: 10px;
  font-family: var(--font-mono);
  opacity: 0.6;
  margin-left: 4px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ── Agents Marquee ── */
.agents-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--divider-color);
  background: rgba(245, 245, 247, 0.5);
  overflow: hidden;
}

.agents-label {
  text-align: center;
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 36px;
}

.agents-track-wrapper {
  position: relative;
  width: 100%;
}

.agents-fade-left {
  position: absolute;
  inset: 0;
  right: auto;
  width: 80px;
  background: linear-gradient(to right, var(--bg-color), transparent);
  z-index: 10;
  pointer-events: none;
}

.agents-fade-right {
  position: absolute;
  inset: 0;
  left: auto;
  width: 80px;
  background: linear-gradient(to left, var(--bg-color), transparent);
  z-index: 10;
  pointer-events: none;
}

.agents-track {
  display: flex;
  width: max-content;
  gap: 40px;
  padding: 0 32px;
  animation: scroll 50s linear infinite;
}

.agents-track:hover {
  animation-play-state: paused;
}

@keyframes scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.agent-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 72px;
  cursor: pointer;
}

.agent-item img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  opacity: 0.55;
  transition: all 0.3s ease-out;
}

.agent-item:hover img {
  opacity: 1;
  transform: scale(1.1);
}

.agent-item span {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color 0.3s;
  text-align: center;
  margin-top: -2px;
}

.agent-item:hover span {
  color: var(--text-primary);
}

/* ── Zen Bar ── */
.zen-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 36px 32px;
  border-bottom: 1px solid var(--divider-color);
  background: rgba(255, 255, 255, 0.3);
}

.zen-bar svg {
  opacity: 0.7;
}

.zen-bar h2 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-color);
  font-weight: 700;
  margin: 0;
}

/* ── Problem / Solution ── */
.problem-section {
  padding: 32px;
  border-bottom: 1px solid var(--divider-color);
  background: rgba(249, 249, 251, 0.5);
}

.problem-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.problem-row:last-child {
  margin-bottom: 0;
}

.problem-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 3px;
  white-space: nowrap;
  flex-shrink: 0;
}

.problem-tag.pain {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
}

.problem-tag.solution {
  color: var(--accent-color);
  background: rgba(123, 104, 238, 0.08);
}

.problem-row p {
  font-family: var(--font-mono);
  font-size: 14px;
  color: #666;
  line-height: 1.7;
  margin: 0;
}

/* ── Feature Rows ── */
.feature-row {
  padding: 32px;
  border-bottom: 1px solid var(--divider-color);
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: background 0.3s;
  cursor: default;
}

.feature-row:hover {
  background: rgba(255, 255, 255, 0.6);
}

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

.feature-row-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.feature-row-icon {
  font-size: 28px;
  transition: color 0.3s;
}

.feature-row:hover .feature-row-icon {
  color: var(--accent-color);
}

.feature-row h3 {
  font-size: 22px;
  letter-spacing: -0.02em;
  margin: 0;
}

.feature-row .step-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
}

.feature-row p {
  font-family: var(--font-mono);
  font-size: 14px;
  color: #666;
  line-height: 1.7;
  max-width: 520px;
  margin: 0;
}

/* ── CTA Section ── */
.cta-section {
  padding: 48px 32px 80px;
  background: rgba(255, 255, 255, 0.4);
  flex-grow: 1;
}

.cta-section h2 {
  font-size: clamp(32px, 5vw, 48px);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.cta-section p {
  font-family: var(--font-mono);
  font-size: 14px;
  color: #666;
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 520px;
}

.cta-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Page Header (non-home) ── */
.page-header {
  padding: 80px 32px 48px;
  border-bottom: 1px solid var(--divider-color);
}

.page-header h1 {
  font-size: 40px;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.page-header p {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

/* ── Text Content (policy / support) ── */
.text-content {
  padding: 32px;
  flex-grow: 1;
}

.policy-section {
  margin-bottom: 36px;
}

.policy-section h2 {
  font-size: 20px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--divider-color);
}

.policy-section p,
.policy-section li {
  font-family: var(--font-mono);
  color: #666;
  margin-bottom: 12px;
  font-size: 14px;
  line-height: 1.7;
}

.policy-section a {
  color: var(--accent-color);
}

/* ── Support Steps ── */
.support-section {
  margin-bottom: 36px;
}

.support-section h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.steps-flow {
  display: flex;
  flex-direction: column;
}

.step-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 20px 0;
  border-bottom: 1px solid var(--divider-color);
  transition: background 0.3s;
}

.step-item:hover {
  background: rgba(255, 255, 255, 0.5);
  margin: 0 -32px;
  padding: 20px 32px;
}

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: var(--text-primary);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 12px;
  font-family: var(--font-mono);
}

.step-item h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.step-item p {
  font-family: var(--font-mono);
  color: #666;
  font-size: 13px;
  line-height: 1.6;
  margin: 0;
}

/* ── FAQ ── */
details {
  border-bottom: 1px solid var(--divider-color);
  padding: 14px 0;
}

details summary {
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

details summary::-webkit-details-marker {
  display: none;
}

details summary::after {
  content: '';
  width: 7px;
  height: 7px;
  border-right: 2px solid var(--text-secondary);
  border-bottom: 2px solid var(--text-secondary);
  transform: rotate(45deg);
  transition: transform 0.2s;
  flex-shrink: 0;
  margin-left: 12px;
}

details[open] summary::after {
  transform: rotate(-135deg);
}

details p {
  font-family: var(--font-mono);
  color: #666;
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.7;
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  padding: 28px 0;
  background: var(--bg-color);
}

.footer-inner {
  max-width: 896px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand .accent {
  color: var(--accent-color);
  font-weight: 700;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

/* ── Background Graphic ── */
.bg-graphic {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.035;
}

.bg-graphic svg {
  width: 60vw;
  max-width: 700px;
  height: auto;
}

/* ── Utilities ── */
.language-block {
  display: none;
}

.language-block.is-visible {
  display: block;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero {
    padding: 60px 20px 48px;
  }

  .hero-title {
    font-size: 40px;
  }

  .agents-fade-left,
  .agents-fade-right {
    width: 40px;
  }

  .feature-row,
  .problem-section,
  .zen-bar,
  .text-content,
  .page-header,
  .cta-section {
    padding-left: 20px;
    padding-right: 20px;
  }

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .topbar {
    padding: 0 16px;
  }

  .nav-links {
    gap: 14px;
    font-size: 13px;
  }

  .step-item:hover {
    margin: 0 -20px;
    padding: 20px 20px;
  }
}

@media (min-width: 769px) {
  .agents-fade-left { width: 120px; }
  .agents-fade-right { width: 120px; }
}