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

:root {
  --bg: #fafaf9;
  --ink: #0a0a0a;
  --ink-2: #525252;
  --ink-3: #a3a3a3;
  --line: #e5e5e5;
  --surface: #fff;
  --accent: #0b6e5f;
  --accent-ink: #064e44;
  --warn: #b45309;
  --warn-bg: #fffbeb;
  --ok-bg: #f0fdf4;
  --radius: 8px;
  --mono: "JetBrains Mono", "SF Mono", "Monaco", "Consolas", monospace;
}

body {
  background: var(--bg);
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "cv11", "ss01";
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 32px;
}

/* nav */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px; /* fixed — header can no longer grow */
  padding: 0; /* was: 20px 0 */
  border-bottom: 1px solid var(--line);
}

.wordmark {
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.wordmark img {
  display: block;
  width: 40px;
  height: 40px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  align-items: center;
  font-size: 14px;
  color: var(--ink-2);
}

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

nav ul a:hover {
  color: var(--ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background 0.15s ease;
  min-height: 36px;
}

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

.btn-primary:hover {
  background: #262626;
}

.btn-ghost {
  background: transparent;
  color: var(--ink-2);
}

.btn-ghost:hover {
  background: var(--line);
  color: var(--ink);
}

.btn-lg {
  padding: 12px 20px;
  font-size: 15px;
  min-height: 44px;
}

/* hamburger */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  position: relative;
  z-index: 110;
  /* must sit above .mobile-menu */
  padding: 0;
  flex-shrink: 0;
}

.hamburger span {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 1px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hamburger span:nth-child(1) {
  top: 14px;
}

.hamburger span:nth-child(2) {
  top: 20px;
}

.hamburger span:nth-child(3) {
  top: 26px;
}

.hamburger.active span:nth-child(1) {
  top: 20px;
  transform: translateX(-50%) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-50%) scaleX(0);
}

.hamburger.active span:nth-child(3) {
  top: 20px;
  transform: translateX(-50%) rotate(-45deg);
}

/* mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 100;
  padding: 88px 32px 32px;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu a {
  display: block;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
}

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

.mobile-menu .mobile-cta {
  margin-top: 32px;
  width: 100%;
}

body.menu-open {
  overflow: hidden;
}

.mobile-menu-top {
  position: absolute;
  top: 20px;
  left: 32px;
  right: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-menu-logo {
  display: block;
}

.mobile-menu-logo img {
  display: block;
  height: 28px;
  width: auto;
}

.menu-close {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  border-radius: var(--radius);
}

.menu-close:hover {
  background: var(--line);
}

/* hero */
.hero {
  padding: 80px 0 64px;
  max-width: 680px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: 20px;
  display: inline-block;
}

.hero h1 {
  font-size: clamp(36px, 5.5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin-bottom: 20px;
}

.hero h1 em {
  font-style: normal;
  color: var(--ink-2);
}

.hero p {
  font-size: 17px;
  color: var(--ink-2);
  max-width: 480px;
  line-height: 1.55;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

/* product mock */
.product {
  margin-top: 32px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  overflow: hidden;
}

.product-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
}

.product-bar .dots {
  display: flex;
  gap: 6px;
}

.product-bar .dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line);
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1px;
  background: var(--line);
}

.product-col {
  background: var(--surface);
  padding: 20px;
  min-height: 280px;
}

.product-col h4 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  margin-bottom: 16px;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.check-item:last-child {
  border-bottom: none;
}

.check-box {
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--line);
  border-radius: 4px;
  margin-top: 2px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
}

.check-box.done {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.check-box.done::before {
  content: "✓";
}

.check-item .name {
  flex: 1;
}

.check-item .meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
}

.photo-pair {
  display: flex;
  gap: 8px;
  margin: 8px 0;
}

.photo-slot {
  flex: 1;
  aspect-ratio: 4/3;
  border-radius: 6px;
  background: #f5f5f4;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  position: relative;
  overflow: hidden;
}

.photo-slot::before {
  content: attr(data-label);
  position: absolute;
  top: 6px;
  left: 8px;
  font-family: var(--mono);
  font-size: 10px;
  color: white;
  background: rgba(0, 0, 0, 0.6);
  padding: 2px 6px;
  border-radius: 3px;
  letter-spacing: 0.02em;
}

.photo-slot.before {
  background: linear-gradient(135deg, #e7e5e4, #d6d3d1);
}

.photo-slot.after {
  background: linear-gradient(135deg, #e0f2f1, #b2dfdb);
}

.product-stat {
  padding: 12px 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
}

.product-stat:last-child {
  border-bottom: none;
}

.product-stat .label {
  font-size: 13px;
  color: var(--ink-2);
}

.product-stat .value {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
}

.product-stat .value.ok {
  color: var(--accent);
}

.product-stat .value.warn {
  color: var(--warn);
}

/* sections */
section {
  padding: 80px 0 40px;
}

.section-label {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-head {
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  max-width: 520px;
  margin-bottom: 48px;
}

/* features */
.features {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.feature {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.feature:last-child {
  border-bottom: none;
}

.feature h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.feature-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
  margin-bottom: 6px;
}

.feature p {
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.6;
}

/* stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.stat {
  padding: 32px 24px;
  background: var(--surface);
}

.stat .num {
  font-family: var(--mono);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 8px;
}

.stat .label {
  font-size: 13px;
  color: var(--ink-2);
}

/* use cases */
.use-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.use {
  background: var(--surface);
  padding: 28px;
}

.use .tag {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin-bottom: 12px;
}

.use h3 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.use p {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.55;
}

/* cta */
.cta-block {
  margin-top: 80px;
  padding: 64px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 40px;
}

.cta-block h2 {
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.cta-block p {
  color: var(--ink-2);
  margin-top: 12px;
  font-size: 15px;
}

/* footer */
footer {
  padding: 32px 0;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--ink-3);
  flex-wrap: wrap;
  gap: 16px;
}

footer .links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

footer a {
  color: var(--ink-2);
  text-decoration: none;
}

footer a:hover {
  color: var(--ink);
}

/* ════════════════════════════════════════
       MOBILE
       ════════════════════════════════════════ */
@media (max-width: 820px) {
  .container {
    padding: 0 20px;
  }

  /* show hamburger */
  .hamburger {
    display: flex;
  }

  /* hide desktop nav */
  nav > ul {
    display: none;
  }

  /* hero */
  .hero {
    padding: 56px 0 40px;
  }

  .hero p {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

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

  /* product mockup */
  .product-bar .dots {
    display: none;
  }

  .product-bar {
    font-size: 12px;
    padding: 10px 16px;
    gap: 12px;
    justify-content: space-between;
  }

  .product-grid {
    grid-template-columns: 1fr;
    background: var(--surface);
  }

  .product-col {
    padding: 20px 16px;
    min-height: auto;
    border-bottom: 1px solid var(--line);
  }

  .product-col:last-child {
    border-bottom: none;
  }

  .photo-slot {
    font-size: 10px;
  }

  /* features */
  section {
    padding: 56px 0 24px;
  }

  .section-head {
    margin-bottom: 32px;
    font-size: clamp(24px, 5vw, 30px);
  }

  .feature {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 24px 0;
  }

  .feature p {
    font-size: 15px;
  }

  /* stats: 2x2 grid */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat {
    padding: 24px 20px;
  }

  /* use cases: single column */
  .use-grid {
    grid-template-columns: 1fr;
  }

  .use {
    padding: 24px 20px;
  }

  /* cta block: stacked */
  .cta-block {
    margin-top: 48px;
    padding: 48px 0;
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .cta-block h2 {
    font-size: clamp(24px, 5vw, 30px);
  }

  .cta-block .btn {
    width: 100%;
    justify-content: center;
  }

  /* footer */
  footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    padding: 24px 0;
  }

  footer .links {
    width: 100%;
    flex-wrap: wrap;
    gap: 16px 20px;
  }
}

/* small phones */
@media (max-width: 400px) {
  .hero h1 {
    font-size: 32px;
  }

  .eyebrow {
    font-size: 11px;
  }

  .product-bar {
    font-size: 11px;
  }

  .stat .num {
    font-size: 26px;
  }
}

/* prevent iOS zoom on input focus */
@media (max-width: 820px) {
  input,
  select,
  textarea {
    font-size: 16px;
  }
}

.mobile-menu a:not(.mobile-cta) {
  display: block;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
}

.mobile-menu .mobile-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-top: 32px;
  padding: 14px 20px;
  background: var(--ink);
  color: white;
  border: none;
  border-bottom: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
}


/* ── footer ── */
footer {
    padding: 32px 0;
    border-top: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--ink-3);
    flex-wrap: wrap;
    gap: 16px;
}
footer .links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}
footer a {
    color: var(--ink-2);
    text-decoration: none;
}
footer a:hover {
    color: var(--ink);
}
@media (max-width: 820px) {
    footer {
        flex-direction: column;
        align-items: flex-start;
    }
}