:root {
  color-scheme: dark;
  --bg: #03070d;
  --bg-2: #071019;
  --ink: #f5f3ee;
  --muted: #c3c5c6;
  --quiet: #838b90;
  --line: rgba(222, 216, 204, 0.2);
  --gold: #c0a271;
  --gold-soft: rgba(192, 162, 113, 0.34);
  --max: 1390px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.5;
}

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

img {
  display: block;
  max-width: 100%;
}

h1,
h2,
p {
  margin: 0;
}

.concept-page {
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(3, 7, 13, 0.42), rgba(3, 7, 13, 0.92)),
    radial-gradient(circle at 77% 34%, rgba(211, 220, 222, 0.15), transparent 32rem),
    linear-gradient(135deg, #05090f 0%, #09121b 52%, #03070d 100%);
}

.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  min-height: 100svh;
  padding: clamp(28px, 4.4vw, 64px) clamp(22px, 5vw, 76px)
    clamp(22px, 3vw, 42px);
  overflow: hidden;
  grid-template-rows: auto 1fr auto auto;
}

.hero::before,
.hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  pointer-events: none;
}

.hero::before {
  background:
    linear-gradient(90deg, #03070d 0%, rgba(3, 7, 13, 0.96) 28%, rgba(3, 7, 13, 0.38) 55%, rgba(3, 7, 13, 0.02) 100%),
    linear-gradient(180deg, rgba(3, 7, 13, 0.16) 0%, rgba(3, 7, 13, 0.08) 44%, #03070d 100%);
}

.hero::after {
  background:
    linear-gradient(124deg, rgba(3, 7, 13, 0) 0 48%, rgba(3, 7, 13, 0.72) 48.2% 58%, rgba(3, 7, 13, 0) 58.2%),
    linear-gradient(8deg, rgba(3, 7, 13, 0) 0 62%, rgba(3, 7, 13, 0.56) 62.2% 75%, rgba(3, 7, 13, 0) 75.2%);
  mix-blend-mode: multiply;
  opacity: 0.72;
}

.hero-media {
  position: absolute;
  inset: 0 0 0 34%;
  z-index: -2;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 55% center;
  filter: contrast(1.04) saturate(0.9);
}

.site-header,
.hero-copy,
.principles,
footer {
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.site-header {
  display: flex;
  position: relative;
  z-index: 3;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  min-width: 0;
  color: var(--ink);
  font-size: clamp(0.86rem, 1vw, 1.03rem);
  font-weight: 760;
  letter-spacing: 0.42em;
  text-transform: uppercase;
}

.brand img {
  width: clamp(36px, 3.8vw, 50px);
  height: auto;
  flex: 0 0 auto;
  filter: drop-shadow(0 12px 18px rgba(0, 0, 0, 0.5));
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(28px, 4vw, 62px);
  color: rgba(245, 243, 238, 0.92);
  font-size: 0.74rem;
  font-weight: 720;
  letter-spacing: 0.35em;
  text-transform: uppercase;
}

.desktop-nav a,
.mobile-nav a {
  transition:
    color 160ms ease,
    opacity 160ms ease;
}

.desktop-nav a:hover,
.desktop-nav a:focus-visible,
.mobile-nav a:hover,
.mobile-nav a:focus-visible {
  color: var(--gold);
}

.mobile-nav {
  display: none;
}

.hero-copy {
  position: relative;
  z-index: 2;
  align-self: center;
  max-width: min(var(--max), 100%);
  padding: clamp(72px, 10vh, 132px) 0 clamp(50px, 8vh, 92px);
}

.hero-copy h1 {
  max-width: 690px;
  color: var(--ink);
  font-size: clamp(3.8rem, 5vw, 5.75rem);
  font-weight: 280;
  letter-spacing: 0;
  line-height: 0.98;
}

.hero-copy h1::after {
  display: block;
  width: 86px;
  height: 1px;
  margin: clamp(34px, 4.2vw, 54px) 0 clamp(26px, 3vw, 40px);
  background: linear-gradient(90deg, var(--gold), rgba(245, 243, 238, 0.18));
  content: "";
}

.hero-copy p {
  max-width: 460px;
  color: rgba(226, 228, 228, 0.82);
  font-size: clamp(1rem, 1.15vw, 1.18rem);
  font-weight: 390;
  line-height: 1.7;
}

.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: clamp(34px, 4.2vw, 52px);
  padding: 0 48px 0 0;
  border-bottom: 1px solid rgba(192, 162, 113, 0.78);
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  transition:
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.text-link:hover,
.text-link:focus-visible {
  border-color: rgba(245, 243, 238, 0.9);
  color: var(--gold);
  transform: translateX(3px);
}

.section-label {
  margin-bottom: 28px;
  color: var(--gold);
  font-size: 0.74rem;
  font-weight: 720;
  letter-spacing: 0.34em;
  text-transform: uppercase;
}

.principles {
  position: relative;
  z-index: 2;
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid rgba(245, 243, 238, 0.04);
}

.principle-grid article {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 22px;
  min-height: 112px;
  padding: 8px 28px 2px 0;
  border-right: 1px solid var(--line);
}

.principle-grid article + article {
  padding-left: clamp(22px, 3vw, 42px);
}

.principle-grid article:last-child {
  border-right: 0;
}

.principle-index {
  grid-row: span 2;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 780;
  letter-spacing: 0.26em;
}

.principle-grid h2 {
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 780;
  letter-spacing: 0.34em;
  line-height: 1.2;
  text-transform: uppercase;
}

.principle-grid p {
  max-width: 235px;
  margin-top: 14px;
  color: rgba(232, 235, 235, 0.76);
  font-size: clamp(0.86rem, 1vw, 0.96rem);
  line-height: 1.55;
}

footer {
  display: flex;
  position: relative;
  z-index: 2;
  align-items: flex-end;
  min-height: clamp(48px, 6vh, 70px);
  padding-top: 26px;
  color: rgba(200, 202, 200, 0.68);
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.08em;
}

@media (max-width: 1080px) {
  .hero {
    padding-right: clamp(22px, 4vw, 46px);
    padding-left: clamp(22px, 4vw, 46px);
  }

  .desktop-nav {
    gap: 28px;
    letter-spacing: 0.28em;
  }

  .hero-media {
    left: 27%;
  }

  .hero-copy h1 {
    font-size: clamp(3.8rem, 7.4vw, 5.8rem);
  }

  .principle-grid article {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .principle-index {
    grid-row: auto;
  }
}

@media (max-width: 820px) {
  .hero {
    min-height: auto;
    padding: 24px 20px 30px;
    grid-template-rows: auto auto auto auto;
  }

  .hero::before {
    background:
      linear-gradient(180deg, #03070d 0%, rgba(3, 7, 13, 0.98) 29%, rgba(3, 7, 13, 0.62) 53%, #03070d 84%),
      linear-gradient(90deg, rgba(3, 7, 13, 0.88), rgba(3, 7, 13, 0.2) 56%, rgba(3, 7, 13, 0.82));
  }

  .hero::after {
    background:
      linear-gradient(139deg, rgba(3, 7, 13, 0) 0 52%, rgba(3, 7, 13, 0.56) 52.2% 68%, rgba(3, 7, 13, 0) 68.2%),
      linear-gradient(0deg, #03070d 0%, rgba(3, 7, 13, 0) 38%);
    opacity: 0.9;
  }

  .hero-media {
    inset: 41svh -24vw auto -10vw;
    height: min(58svh, 560px);
  }

  .hero-media img {
    object-position: 58% center;
  }

  .brand {
    gap: 14px;
    max-width: calc(100% - 98px);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
  }

  .brand img {
    width: 38px;
  }

  .desktop-nav {
    display: none;
  }

  .mobile-nav {
    display: block;
    position: relative;
  }

  .site-header:has(.mobile-nav[open]) {
    margin-bottom: 178px;
  }

  .mobile-nav summary {
    min-height: 40px;
    padding: 12px 0 10px 20px;
    color: rgba(245, 243, 238, 0.92);
    cursor: pointer;
    font-size: 0.7rem;
    font-weight: 760;
    letter-spacing: 0.28em;
    list-style: none;
    text-transform: uppercase;
  }

  .mobile-nav summary::-webkit-details-marker {
    display: none;
  }

  .mobile-nav nav {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    display: grid;
    min-width: 190px;
    padding: 18px;
    border: 1px solid rgba(245, 243, 238, 0.14);
    background: rgba(3, 7, 13, 0.86);
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.34);
    gap: 16px;
    backdrop-filter: blur(16px);
  }

  .mobile-nav a {
    color: rgba(245, 243, 238, 0.9);
    font-size: 0.76rem;
    font-weight: 740;
    letter-spacing: 0.24em;
    text-transform: uppercase;
  }

  .hero-copy {
    padding: clamp(64px, 12vh, 110px) 0 min(48svh, 410px);
  }

  .hero-copy h1 {
    max-width: 9ch;
    font-size: clamp(3.05rem, 13.4vw, 5.1rem);
    line-height: 0.96;
  }

  .hero-copy h1::after {
    width: 70px;
    margin-top: 32px;
    margin-bottom: 24px;
  }

  .hero-copy p {
    max-width: 31rem;
    font-size: clamp(0.98rem, 3.9vw, 1.12rem);
    line-height: 1.62;
  }

  .text-link {
    min-height: 48px;
    margin-top: 30px;
    padding-right: 20px;
    font-size: 0.72rem;
    letter-spacing: 0.26em;
  }

  .principles {
    padding-top: 24px;
  }

  .section-label {
    margin-bottom: 18px;
  }

  .principle-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: 1px solid var(--line);
  }

  .principle-grid article,
  .principle-grid article + article {
    min-height: 0;
    padding: 20px 18px 20px 0;
    border-right: 0;
    border-bottom: 1px solid rgba(222, 216, 204, 0.16);
  }

  .principle-grid article:nth-child(even) {
    padding-right: 0;
    padding-left: 18px;
    border-left: 1px solid rgba(222, 216, 204, 0.16);
  }

  .principle-grid article:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .principle-grid h2 {
    font-size: 0.72rem;
    letter-spacing: 0.26em;
  }

  .principle-grid p {
    font-size: 0.88rem;
  }

  footer {
    min-height: 64px;
    padding-top: 22px;
    font-size: 0.72rem;
    line-height: 1.8;
    letter-spacing: 0.04em;
  }
}

@media (max-width: 480px) {
  .hero {
    padding-right: 18px;
    padding-left: 18px;
  }

  .hero-media {
    inset: 46svh -45vw auto -31vw;
    height: 45svh;
  }

  .site-header {
    align-items: flex-start;
  }

  .brand {
    font-size: 0.7rem;
    letter-spacing: 0.18em;
  }

  .mobile-nav summary {
    padding-left: 12px;
    letter-spacing: 0.22em;
  }

  .hero-copy {
    padding-top: 58px;
    padding-bottom: 40svh;
  }

  .hero-copy h1 {
    max-width: 8.6ch;
    font-size: clamp(2.78rem, 13.2vw, 3.7rem);
  }

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

  .principle-grid article,
  .principle-grid article + article,
  .principle-grid article:nth-child(even) {
    padding: 18px 0;
    border-right: 0;
    border-bottom: 1px solid rgba(222, 216, 204, 0.16);
    border-left: 0;
  }

  .principle-grid article:nth-last-child(-n + 2) {
    border-bottom: 1px solid rgba(222, 216, 204, 0.16);
  }

  .principle-grid article:last-child {
    border-bottom: 0;
  }
}