/* ----- RESET & BASE ----- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --black: #000000;
  --white: #ffffff;
  --gray-100: #f5f5f5;
  --gray-200: #e8e8e8;
  --gray-400: #999999;
  --gray-600: #666666;
  --gray-800: #222222;

  --font-mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Monaco,
               "Cascadia Mono", "Segoe UI Mono", "Roboto Mono",
               "Oxygen Mono", "Ubuntu Monospace", "Fira Mono",
               "Droid Sans Mono", "Courier New", monospace;

  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --radius: 4px;
  --radius-lg: 8px;
  --nav-h: 60px;
  --section-gap: 96px;
  --container-max: 1100px;
  --container-pad: 24px;

  --transition: 150ms ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--white);
  color: var(--black);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:hover {
  opacity: 0.7;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--black);
  outline-offset: 2px;
  border-radius: var(--radius);
}

ul, ol {
  list-style: none;
}

img, svg {
  display: block;
}

/* ----- UTILITY ----- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--section-gap);
}

.section-alt {
  background: var(--gray-100);
}

.section-title {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-sub {
  font-size: 1.0625rem;
  color: var(--gray-600);
  max-width: 540px;
  margin-bottom: 56px;
}

/* ----- BUTTONS ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), opacity var(--transition);
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.btn-primary:hover {
  background: var(--gray-800);
  opacity: 1;
}

.btn-ghost {
  background: transparent;
  color: var(--black);
  border-color: var(--gray-200);
}

.btn-ghost:hover {
  border-color: var(--black);
  opacity: 1;
}

.btn-full {
  width: 100%;
}

/* ----- NAV ----- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-200);
  height: var(--nav-h);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.nav-logo {
  font-size: 1.375rem;
  text-decoration: none;
  color: var(--black);
  display: inline-flex;
  align-items: center;
  line-height: 1;
}

.nav-logo:hover {
  opacity: 0.6;
}

.nav-logo-text {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-left: 8px;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius);
  color: var(--gray-600);
  transition: color var(--transition);
}

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

.nav-cta {
  background: var(--black) !important;
  color: var(--white) !important;
  padding: 7px 16px !important;
}

.nav-cta:hover {
  background: var(--gray-800) !important;
  opacity: 1 !important;
}

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

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--black);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.nav-mobile {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  padding: 12px var(--container-pad) 20px;
}

.nav-mobile li {
  border-bottom: 1px solid var(--gray-100);
}

.nav-mobile a {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  text-decoration: none;
  padding: 14px 0;
  color: var(--black);
}

/* ----- HERO ----- */
.hero {
  padding-block: 72px 40px;
  text-align: center;
}

.hero-logo {
  font-size: clamp(3rem, 10vw, 5.5rem);
  line-height: 1;
  margin-bottom: 32px;
  color: var(--black);
  display: flex;
  align-items: center;
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: clamp(1.625rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 20px;
  max-width: 700px;
  margin-inline: auto;
}

.hero-sub {
  font-size: 1.0625rem;
  color: var(--gray-600);
  max-width: 480px;
  margin-inline: auto;
  margin-bottom: 40px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 48px;
}

.hero-devices {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--gray-400);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.device-badge {
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.device-sep {
  font-size: 1rem;
}

/* ----- HOW IT WORKS ----- */
.steps {
  display: flex;
  flex-direction: column;
  gap: 64px;
  counter-reset: steps;
}

.step {
  display: grid;
  grid-template-columns: 48px 40px 1fr;
  gap: 0 24px;
  align-items: start;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--gray-400);
  letter-spacing: 0.08em;
  padding-top: 6px;
}

.step-icon {
  color: var(--black);
  padding-top: 4px;
}

.step-content h3 {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.step-content p {
  color: var(--gray-600);
  font-size: 0.9375rem;
  line-height: 1.65;
  max-width: 520px;
}

.step-devices {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.chip {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  color: var(--gray-600);
}

/* ----- CODE BLOCK ----- */
.code-block {
  margin-top: 20px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--black);
  max-width: 520px;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--gray-800);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.code-block-header span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gray-400);
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  color: var(--gray-400);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.copy-btn:hover {
  color: var(--white);
  border-color: rgba(255,255,255,0.4);
}

.copy-btn.copied {
  color: #6ee7b7;
  border-color: rgba(110, 231, 183, 0.4);
}

.copy-btn:focus-visible {
  outline: 2px solid var(--white);
  outline-offset: 2px;
}

.code-pre {
  padding: 20px;
  overflow-x: auto;
}

.code-pre code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #e2e8f0;
  white-space: pre;
}

/* ----- TERMINAL DEMO ----- */
.terminal-wrapper {
  max-width: 720px;
  margin-inline: auto;
}

.terminal {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--black);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: var(--gray-800);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot--red    { background: #ff5f57; }
.terminal-dot--yellow { background: #ffbd2e; }
.terminal-dot--green  { background: #28c840; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gray-400);
  margin-left: 8px;
}

.terminal-body {
  padding: 24px 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.terminal-line {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.terminal-line--prompt .prompt-icon {
  font-size: 0.75rem;
  color: var(--white);
  padding-top: 3px;
  flex-shrink: 0;
  opacity: 0.5;
}

.terminal-line--prompt .prompt-text {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--white);
  line-height: 1.5;
}

.terminal-line--response {
  padding-left: 24px;
}

.terminal-line--response .response-text {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: #a0aec0;
  line-height: 1.75;
}

.terminal-line--response .response-text strong {
  color: #e2e8f0;
  font-weight: 600;
}

.terminal-line--cursor {
  padding-left: 24px;
}

.cursor-blink {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--white);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Staggered animation */
.terminal-line--delayed-1 { opacity: 0; animation: fadeIn 0.4s ease 1.2s forwards; }
.terminal-line--delayed-2 { opacity: 0; animation: fadeIn 0.4s ease 2s forwards; }
.terminal-line--delayed-3 { opacity: 0; animation: fadeIn 0.4s ease 2.8s forwards; }

@keyframes fadeIn {
  to { opacity: 1; }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .terminal-line--delayed-1,
  .terminal-line--delayed-2,
  .terminal-line--delayed-3 {
    animation: none;
    opacity: 1;
  }
  .cursor-blink {
    animation: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ----- EXAMPLE PROMPTS ----- */
.prompts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.prompt-card {
  position: relative;
  padding: 24px 24px 24px 20px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  background: var(--white);
  transition: border-color var(--transition);
}

.prompt-card:hover {
  border-color: var(--black);
}

.prompt-q {
  position: absolute;
  top: 16px;
  left: 20px;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--gray-200);
  line-height: 1;
  user-select: none;
}

.prompt-card p {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--black);
  line-height: 1.55;
  padding-left: 16px;
  padding-top: 8px;
}

/* ----- PRICING ----- */
.pricing-card-wrap {
  display: flex;
  justify-content: center;
}

.pricing-card {
  width: 100%;
  max-width: 420px;
  border: 1.5px solid var(--black);
  border-radius: var(--radius-lg);
  padding: 40px;
  background: var(--white);
}

.pricing-header {
  margin-bottom: 32px;
}

.pricing-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-600);
  display: block;
  margin-bottom: 12px;
}

.pricing-amount {
  display: flex;
  align-items: flex-start;
  gap: 2px;
  line-height: 1;
}

.pricing-currency {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  padding-top: 8px;
}

.pricing-price {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.pricing-period {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--gray-600);
  padding-top: 28px;
}

.pricing-features {
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9375rem;
  color: var(--gray-800);
  line-height: 1.5;
}

.check {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--black);
  flex-shrink: 0;
  margin-top: 1px;
}

.pricing-note {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gray-400);
  text-align: center;
}

/* ----- TRUST ----- */
.trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.trust-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 0 20px;
  align-items: start;
}

.trust-icon {
  padding-top: 2px;
  color: var(--black);
}

.trust-item h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
  grid-column: 2;
}

.trust-item p {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.65;
  grid-column: 2;
  max-width: 480px;
}

/* ----- FAQ ----- */
.faq-list {
  max-width: 700px;
  margin-inline: auto;
  border-top: 1px solid var(--gray-200);
}

.faq-item {
  border-bottom: 1px solid var(--gray-200);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 22px 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--black);
  gap: 16px;
  line-height: 1.4;
}

.faq-question:hover {
  opacity: 0.7;
}

.faq-icon {
  font-size: 1.125rem;
  font-weight: 300;
  flex-shrink: 0;
  color: var(--gray-400);
  transition: transform var(--transition);
  line-height: 1;
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
  color: var(--black);
}

.faq-answer {
  padding-bottom: 22px;
}

.faq-answer p {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.7;
}

.faq-answer a {
  color: var(--black);
  font-weight: 600;
}

/* ----- FOOTER ----- */
.footer {
  background: var(--black);
  color: var(--white);
  padding-block: 64px 40px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-logo {
  font-size: 1.5rem;
  text-decoration: none;
  color: var(--white);
  display: inline-flex;
  align-items: center;
  line-height: 1;
  margin-bottom: 8px;
}

.footer-logo:hover {
  opacity: 0.6;
}

.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--gray-400);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-nav a {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--gray-400);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: var(--white);
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid var(--gray-800);
  padding-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-bottom p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gray-600);
}

/* =========================================================
   RESPONSIVE — tablet (≥ 640px)
   ========================================================= */
@media (min-width: 640px) {
  :root {
    --container-pad: 32px;
    --section-gap: 112px;
  }

  .prompts-grid {
    grid-template-columns: 1fr 1fr;
  }

  .trust-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px 56px;
  }

  .trust-item h3 {
    grid-column: 2;
  }

  .trust-item p {
    grid-column: 2;
  }

  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }

  .footer-nav {
    flex-direction: row;
    gap: 48px;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* =========================================================
   RESPONSIVE — desktop (≥ 1024px)
   ========================================================= */
@media (min-width: 1024px) {
  :root {
    --container-pad: 48px;
    --section-gap: 128px;
  }

  /* Nav: show links, hide hamburger */
  .nav-links {
    display: flex;
  }
  .nav-toggle {
    display: none;
  }
  .nav-mobile[hidden] {
    display: none !important;
  }

  /* Steps: horizontal on large screens */
  .steps {
    flex-direction: row;
    gap: 0;
    align-items: flex-start;
  }

  .step {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-inline: 32px;
    border-left: 1px solid var(--gray-200);
    grid-template-columns: unset;
  }

  .step:first-child {
    padding-left: 0;
    border-left: none;
  }

  .step-number {
    padding-top: 0;
  }

  .step-icon {
    padding-top: 0;
  }

  .step-content p {
    max-width: 100%;
  }

  /* Prompts: 2x2 always */
  .prompts-grid {
    grid-template-columns: 1fr 1fr;
  }

  .trust-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* =========================================================
   PRINT
   ========================================================= */
@media print {
  .nav, .hero-actions, .copy-btn, .footer {
    display: none;
  }
}