:root {
  --black: #08090b;
  --charcoal: #111418;
  --panel: #181d23;
  --panel-soft: #20262e;
  --steel: #8f9aa6;
  --muted: #b7c0ca;
  --white: #ffffff;
  --off-white: #f4f7f9;
  --line: rgba(255, 255, 255, 0.13);
  --dark-line: rgba(17, 20, 24, 0.12);
  --orange: #ff8a1f;
  --orange-dark: #c85c07;
  --blue: #4eb3ff;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--off-white);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  background: var(--black);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.032) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}

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

button,
input,
select,
textarea {
  font: inherit;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 790px;
  margin-bottom: 22px;
  font-size: clamp(2.5rem, 7vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.08rem;
  line-height: 1.25;
  letter-spacing: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 9, 11, 0.88);
  backdrop-filter: blur(16px);
}

.nav {
  width: min(1180px, calc(100% - 32px));
  min-height: 82px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  display: inline-grid;
  place-items: center;
  border: 2px solid rgba(255, 138, 31, 0.55);
  border-radius: 8px;
  color: var(--black);
  background: linear-gradient(135deg, var(--orange), #ffd37f);
  font-weight: 900;
  box-shadow: 0 0 0 5px rgba(255, 138, 31, 0.08);
}

.brand-copy strong,
.brand-copy small {
  display: block;
}

.brand-copy strong {
  color: var(--white);
  font-size: 1.1rem;
  line-height: 1.05;
}

.brand-copy small {
  margin-top: 4px;
  color: var(--steel);
  font-size: 0.78rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
}

.nav-links a:not(.button):hover,
.nav-links a:not(.button):focus-visible {
  color: var(--white);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  cursor: pointer;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: var(--white);
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 8px;
  padding: 0 20px;
  color: var(--black);
  background: var(--orange);
  cursor: pointer;
  font-weight: 900;
  box-shadow: 0 14px 32px rgba(255, 138, 31, 0.24);
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  background: #ffae4d;
  transform: translateY(-1px);
}

.button-secondary {
  color: var(--white);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: none;
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: rgba(255, 255, 255, 0.1);
}

.button-small {
  min-height: 42px;
  padding: 0 16px;
}

.section-shell,
.section-pad {
  padding-left: max(24px, calc((100vw - 1180px) / 2));
  padding-right: max(24px, calc((100vw - 1180px) / 2));
}

.hero {
  min-height: 720px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 460px);
  align-items: center;
  gap: 54px;
  padding-top: 92px;
  padding-bottom: 78px;
  background:
    radial-gradient(circle at 80% 22%, rgba(78, 179, 255, 0.16), transparent 28%),
    linear-gradient(135deg, var(--black), var(--charcoal) 58%, #15110d);
}

.eyebrow {
  margin-bottom: 12px;
  color: var(--orange);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-copy {
  max-width: 690px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 1.18rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.concept-visual {
  margin: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02)),
    var(--panel);
  box-shadow: var(--shadow);
}

.concept-shell {
  position: relative;
  min-height: 390px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 42%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 28px),
    #0d1014;
}

.case-lid {
  position: absolute;
  left: 9%;
  right: 9%;
  top: 36px;
  height: 54px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: linear-gradient(180deg, #303944, #171c22);
}

.bit-row {
  position: absolute;
  left: 13%;
  right: 13%;
  top: 112px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  align-items: end;
}

.bit-row span {
  height: 132px;
  border-radius: 6px 6px 2px 2px;
  background:
    linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.38), transparent),
    linear-gradient(180deg, #cfd6dd, #687380 72%, #2d343c);
  clip-path: polygon(38% 0, 62% 0, 72% 100%, 28% 100%);
}

.bit-row span:nth-child(2) { height: 150px; }
.bit-row span:nth-child(3) { height: 118px; }
.bit-row span:nth-child(4) { height: 164px; }
.bit-row span:nth-child(5) { height: 140px; }

.reservoir {
  position: absolute;
  left: 12%;
  right: 45%;
  bottom: 42px;
  height: 70px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 138, 31, 0.44);
  border-radius: 8px;
  color: var(--black);
  background:
    linear-gradient(180deg, rgba(255, 211, 127, 0.95), rgba(255, 138, 31, 0.95));
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
}

.brush-tube {
  position: absolute;
  right: 13%;
  bottom: 42px;
  width: 86px;
  height: 146px;
  display: flex;
  justify-content: center;
  gap: 5px;
  padding-top: 14px;
  border: 1px solid rgba(78, 179, 255, 0.42);
  border-radius: 999px 999px 8px 8px;
  background: rgba(78, 179, 255, 0.12);
}

.brush-tube i {
  width: 4px;
  height: 92px;
  border-radius: 99px;
  background: var(--blue);
}

.brush-tube i:nth-child(even) {
  height: 72px;
  margin-top: 12px;
}

.kickstand {
  position: absolute;
  right: 23%;
  bottom: 18px;
  width: 112px;
  height: 9px;
  border-radius: 99px;
  background: #59636f;
  transform: rotate(-18deg);
  transform-origin: right center;
}

.concept-visual figcaption {
  margin-top: 14px;
  color: var(--steel);
  font-size: 0.9rem;
  font-weight: 800;
  text-align: center;
}

.section-pad {
  padding-top: 88px;
  padding-bottom: 88px;
}

.section-heading {
  max-width: 780px;
}

.section-heading.centered {
  margin: 0 auto 34px;
  text-align: center;
}

.section-heading.centered p:not(.eyebrow) {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  color: var(--muted);
}

.problem {
  background: var(--off-white);
  color: var(--charcoal);
}

.problem .section-heading {
  margin-bottom: 34px;
}

.card-grid {
  display: grid;
  gap: 18px;
}

.four-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.info-card,
.feature-card {
  border-radius: 8px;
}

.info-card {
  min-height: 244px;
  padding: 24px;
  border: 1px solid var(--dark-line);
  background: var(--white);
  box-shadow: 0 16px 34px rgba(17, 20, 24, 0.08);
}

.info-card p {
  margin-bottom: 0;
  color: #4c5661;
}

.card-index {
  width: 46px;
  height: 46px;
  display: inline-grid;
  place-items: center;
  margin-bottom: 28px;
  border-radius: 8px;
  color: var(--black);
  background: var(--orange);
  font-weight: 900;
}

.split-section,
.licensing,
.contact-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.86fr) minmax(320px, 1fr);
  align-items: start;
  gap: 56px;
}

.split-section {
  background:
    linear-gradient(135deg, #101318, #191f26);
}

.split-copy,
.licensing-copy,
.contact-copy {
  color: var(--muted);
  font-size: 1.08rem;
}

.feature-band {
  background: #0f1216;
}

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

.feature-card {
  min-height: 230px;
  padding: 24px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025));
}

.feature-card span {
  width: 42px;
  height: 42px;
  display: block;
  margin-bottom: 28px;
  border: 10px solid rgba(255, 138, 31, 0.2);
  border-radius: 50%;
  background: var(--orange);
  box-shadow: inset 0 0 0 6px #0f1216;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.audience {
  background: var(--off-white);
  color: var(--charcoal);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.audience-grid span {
  min-height: 70px;
  display: flex;
  align-items: center;
  border: 1px solid var(--dark-line);
  border-left: 5px solid var(--orange);
  border-radius: 8px;
  padding: 16px;
  background: var(--white);
  color: var(--charcoal);
  font-weight: 900;
}

.patent-section {
  background:
    linear-gradient(rgba(8, 9, 11, 0.9), rgba(8, 9, 11, 0.9)),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px 16px);
}

.patent-panel {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1fr);
  gap: 36px;
  align-items: start;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(24, 29, 35, 0.88);
  box-shadow: var(--shadow);
}

.patent-panel .section-heading p:not(.eyebrow) {
  color: var(--muted);
}

.patent-list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.patent-list div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.patent-list dt {
  color: var(--steel);
  font-weight: 800;
}

.patent-list dd {
  margin: 0;
  color: var(--white);
  font-weight: 900;
}

.legal-note {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--steel);
  font-size: 0.92rem;
}

.licensing {
  background: var(--off-white);
  color: var(--charcoal);
}

.check-list {
  margin: 26px 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.check-list li {
  position: relative;
  padding-left: 34px;
  color: #28313a;
  font-weight: 900;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background:
    linear-gradient(135deg, transparent 45%, var(--black) 46% 55%, transparent 56%),
    var(--orange);
}

.contact-section {
  background:
    radial-gradient(circle at 16% 20%, rgba(255, 138, 31, 0.13), transparent 26%),
    var(--charcoal);
}

.contact-placeholder {
  display: inline-flex;
  margin-top: 10px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 138, 31, 0.35);
  border-radius: 8px;
  color: var(--white);
  background: rgba(255, 138, 31, 0.08);
  font-weight: 900;
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  box-shadow: var(--shadow);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: var(--white);
  font-weight: 900;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  padding: 13px 14px;
  color: var(--white);
  background: #0b0d10;
}

.contact-form select option {
  color: var(--black);
  background: var(--white);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: 3px solid rgba(255, 138, 31, 0.24);
  border-color: var(--orange);
}

.contact-form textarea {
  resize: vertical;
}

.form-message {
  min-height: 24px;
  margin: 0;
  color: #ffd37f;
  font-weight: 900;
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(260px, 0.8fr);
  gap: 30px;
  padding: 42px max(24px, calc((100vw - 1180px) / 2));
  border-top: 1px solid var(--line);
  background: var(--black);
  color: var(--steel);
}

.footer-brand {
  margin-bottom: 18px;
}

.site-footer p {
  margin-bottom: 8px;
}

.footer-meta {
  align-self: end;
}

@media (max-width: 1060px) {
  .hero,
  .split-section,
  .licensing,
  .contact-section,
  .patent-panel {
    grid-template-columns: 1fr;
  }

  .concept-visual {
    max-width: 560px;
  }

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

@media (max-width: 840px) {
  .nav {
    min-height: 72px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: var(--shadow);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    padding: 12px;
  }

  .nav-links .button {
    margin-top: 8px;
  }

  .hero {
    min-height: auto;
    padding-top: 60px;
    padding-bottom: 58px;
  }

  .section-pad {
    padding-top: 66px;
    padding-bottom: 66px;
  }

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

@media (max-width: 620px) {
  h1 {
    font-size: clamp(2.32rem, 12vw, 3.5rem);
  }

  .brand-mark {
    width: 42px;
    height: 42px;
    flex-basis: 42px;
  }

  .brand-copy strong {
    font-size: 1rem;
  }

  .hero-actions .button,
  .contact-form .button {
    width: 100%;
  }

  .four-grid,
  .feature-grid,
  .audience-grid,
  .form-row {
    grid-template-columns: 1fr;
  }

  .concept-shell {
    min-height: 330px;
  }

  .bit-row {
    left: 10%;
    right: 10%;
    gap: 8px;
  }

  .brush-tube {
    right: 10%;
    width: 72px;
  }

  .reservoir {
    right: 48%;
  }

  .patent-panel,
  .contact-form {
    padding: 22px;
  }

  .patent-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}