:root {
  color-scheme: light;
  --orange: #ff9f1c;
  --sand: #ffbf69;
  --white: #ffffff;
  --mint: #cbf3f0;
  --teal: #2ec4b6;
  --paper: var(--mint);
  --surface: var(--white);
  --ink: #123f3a;
  --muted: #4e7772;
  --line: rgba(18, 63, 58, .2);
  --accent: var(--orange);
  --accent-soft: var(--sand);
  --clock: #163b37;
  --clock-dark: #0b2724;
  --display-font: Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif;
  --shadow: 0 24px 60px rgba(18, 63, 58, .14);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #0d302d;
  --surface: #123f3a;
  --ink: var(--white);
  --muted: var(--mint);
  --line: rgba(203, 243, 240, .22);
  --accent: var(--orange);
  --accent-soft: var(--sand);
  --shadow: 0 24px 70px rgba(0, 0, 0, .28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  transition: color .3s ease, background-color .3s ease;
}

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

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 14px;
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: relative;
  z-index: 10;
  min-height: 84px;
  padding: 0 clamp(20px, 4vw, 64px);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: blur(18px);
}

.wordmark {
  width: fit-content;
  padding: 8px 13px 6px;
  border-radius: 7px;
  color: var(--white);
  background: var(--clock);
  box-shadow: 0 5px 0 var(--orange);
  font-family: var(--display-font);
  font-size: clamp(29px, 2.5vw, 40px);
  font-weight: 900;
  letter-spacing: .015em;
  line-height: .9;
  text-transform: uppercase;
}

.wordmark span { color: var(--sand); }

.site-header nav {
  display: flex;
  gap: 34px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .13em;
}

.site-header nav a {
  position: relative;
  padding: 6px 0;
}

.site-header nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .25s ease;
}

.site-header nav a:hover::after,
.site-header nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.theme-toggle {
  justify-self: end;
  width: 48px;
  height: 26px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: transparent;
  cursor: pointer;
}

.theme-toggle span {
  display: block;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--teal);
  transition: transform .25s ease, background-color .25s ease;
}

[data-theme="dark"] .theme-toggle span {
  background: var(--accent);
  transform: translateX(20px);
}

.hero {
  min-height: calc(100svh - 84px);
  padding: clamp(52px, 7vw, 110px) clamp(20px, 4vw, 64px);
  display: grid;
  grid-template-columns: minmax(310px, .82fr) minmax(500px, 1.18fr);
  gap: clamp(45px, 8vw, 130px);
  align-items: center;
}

.eyebrow {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .2em;
}

.hero h1,
.section-heading h2,
.about-copy h2 {
  margin: 0;
  font-weight: 400;
  letter-spacing: -.07em;
  line-height: .88;
}

.hero h1 { font-size: clamp(64px, 8vw, 138px); }
.hero h1::first-letter { text-transform: uppercase; }

.intro {
  max-width: 430px;
  margin: 35px 0 24px;
  color: var(--muted);
  font-size: clamp(16px, 1.4vw, 20px);
}

.text-link {
  display: flex;
  width: fit-content;
  align-items: center;
  gap: 12px;
  padding-bottom: 4px;
  border-bottom: 1px solid currentColor;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
}

.text-link span { color: var(--accent); font-size: 18px; }

.clock-stage {
  min-width: 0;
  padding: clamp(22px, 3vw, 46px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(145deg, var(--teal), #26afa2);
  box-shadow: var(--shadow);
}

.clock-meta,
.clock-footer {
  display: flex;
  justify-content: space-between;
  color: var(--ink);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
}

.clock {
  margin: clamp(40px, 7vw, 100px) 0;
  display: flex;
  perspective: 1200px;
  align-items: center;
  justify-content: center;
  gap: clamp(8px, 1.6vw, 24px);
}

.time-group { display: flex; gap: clamp(5px, .8vw, 12px); }

.flip-card {
  --card-height: clamp(100px, 14vw, 218px);
  position: relative;
  display: block;
  width: clamp(62px, 9.4vw, 146px);
  height: var(--card-height);
  perspective: 800px;
  color: var(--white);
  font-family: var(--display-font);
  font-size: clamp(82px, 12.3vw, 190px);
  font-weight: 900;
  letter-spacing: -.04em;
  line-height: 1;
  filter: drop-shadow(0 12px 13px rgba(11, 39, 36, .25));
}

.card-half,
.flip-half {
  position: absolute;
  left: 0;
  width: 100%;
  height: 50%;
  overflow: hidden;
  background: linear-gradient(90deg, var(--clock-dark), var(--clock) 48%, var(--clock-dark));
  backface-visibility: hidden;
  transform-style: preserve-3d;
}

.card-half.top,
.flip-half.top {
  top: 0;
  border: 1px solid rgba(255, 255, 255, .08);
  border-bottom: 1px solid rgba(0, 0, 0, .72);
  border-radius: 11px 11px 3px 3px;
  transform-origin: bottom;
}

.card-half.bottom,
.flip-half.bottom {
  bottom: 0;
  border: 1px solid rgba(255, 255, 255, .06);
  border-top: 1px solid rgba(255, 255, 255, .08);
  border-radius: 3px 3px 11px 11px;
  transform-origin: top;
}

.card-half .card-value,
.flip-half .card-value {
  position: absolute;
  left: 0;
  width: 100%;
  height: 200%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-shadow: 0 2px 0 rgba(255, 255, 255, .17), 0 7px 8px rgba(0, 0, 0, .52);
}

.card-half.top .card-value,
.flip-half.top .card-value { top: 0; }

.card-half.bottom .card-value,
.flip-half.bottom .card-value { bottom: 0; }

.card-half.top { z-index: 1; }
.card-half.bottom { z-index: 0; }
.flip-half.top { z-index: 4; }
.flip-half.bottom {
  z-index: 3;
  transform: rotateX(90deg);
}

.flip-card:not(.flipping) .flip-half { visibility: hidden; }

.flip-card.flipping .flip-half.top {
  animation: flip-top .32s cubic-bezier(.55, .08, .68, .53) forwards;
}

.flip-card.flipping .flip-half.bottom {
  animation: flip-bottom .32s .32s cubic-bezier(.25, .46, .45, .94) forwards;
}

.flip-card::before,
.flip-card::after {
  content: "";
  position: absolute;
  top: calc(50% - 4px);
  z-index: 8;
  width: 5px;
  height: 8px;
  border-radius: 2px;
  background: #061513;
}

.flip-card::before { left: -2px; }
.flip-card::after { right: -2px; }

.flip-card .card-half.top::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: rgba(0, 0, 0, .8);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .08);
}

.colon {
  color: var(--sand);
  font-size: clamp(68px, 9vw, 150px);
  font-family: var(--display-font);
  line-height: 1;
  animation: blink 1s steps(1) infinite;
  text-shadow: 0 4px 0 rgba(18, 63, 58, .18);
}

.seconds-track {
  height: 2px;
  margin-bottom: 18px;
  overflow: hidden;
  background: var(--line);
}

.seconds-track span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--orange);
  transition: width .3s linear;
}

.index-section {
  padding: clamp(90px, 12vw, 180px) clamp(20px, 4vw, 64px);
  border-top: 1px solid var(--line);
}

.section-heading {
  margin-bottom: 65px;
  display: grid;
  grid-template-columns: .45fr 1fr;
  align-items: end;
}

.section-heading .eyebrow { margin: 0; }
.section-heading h2,
.about-copy h2 { font-size: clamp(58px, 7vw, 112px); }

.project-list { border-top: 1px solid var(--ink); }

.project-card {
  padding: 34px 0 38px;
  display: grid;
  grid-template-columns: .45fr 1fr auto;
  gap: 30px;
  align-items: start;
  border-bottom: 1px solid var(--line);
  transition: padding .25s ease;
}

.project-card:hover { padding-right: 18px; padding-left: 18px; }

.project-number,
.project-status,
.project-type {
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
}

.project-card h3 {
  margin: 3px 0 9px;
  font-size: clamp(30px, 3.8vw, 58px);
  font-weight: 400;
  letter-spacing: -.05em;
  line-height: 1;
}

.project-card p:not(.project-type) {
  max-width: 590px;
  margin: 0;
  color: var(--muted);
}

.project-status {
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 20px;
}

.about-section {
  padding: clamp(90px, 11vw, 170px) clamp(20px, 6vw, 100px);
  display: grid;
  grid-template-columns: minmax(320px, .8fr) minmax(400px, 1.2fr);
  gap: 10vw;
  align-items: center;
  border-top: 1px solid var(--line);
  background: var(--white);
}

.orbit-mark {
  position: relative;
  width: min(34vw, 470px);
  aspect-ratio: 1;
  margin: auto;
  border: 1px solid var(--line);
  border-radius: 50%;
  animation: rotate 28s linear infinite;
}

.orbit-mark > span {
  position: absolute;
  font-size: clamp(25px, 3vw, 46px);
}

.orbit-mark > span:nth-child(1) { top: 4%; left: 47%; }
.orbit-mark > span:nth-child(2) { top: 46%; right: 4%; }
.orbit-mark > span:nth-child(3) { bottom: 4%; left: 49%; }
.orbit-mark > span:nth-child(4) { top: 46%; left: 5%; }

.orbit-core {
  position: absolute;
  inset: 34%;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--clock-dark);
  background: var(--sand);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .15em;
  animation: counter-rotate 28s linear infinite;
}

.about-copy p:not(.eyebrow) {
  max-width: 640px;
  color: var(--muted);
  font-size: clamp(16px, 1.5vw, 21px);
}

footer {
  padding: 70px clamp(20px, 4vw, 64px) 35px;
  min-height: 42vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-top: 1px solid var(--line);
}

.footer-link {
  font-size: clamp(64px, 10vw, 160px);
  letter-spacing: -.08em;
  line-height: 1;
}

.footer-link span { color: var(--accent); font-size: .55em; }

.footer-meta {
  display: flex;
  justify-content: space-between;
  padding-top: 50px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .15em;
}

@keyframes flip-top {
  from { transform: rotateX(0); }
  to { transform: rotateX(-90deg); }
}

@keyframes flip-bottom {
  from { transform: rotateX(90deg); }
  to { transform: rotateX(0); }
}

@keyframes blink {
  50% { opacity: .25; }
}

@keyframes rotate {
  to { transform: rotate(360deg); }
}

@keyframes counter-rotate {
  to { transform: rotate(-360deg); }
}

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; }
  .clock-stage { order: -1; }
  .section-heading { grid-template-columns: 1fr; gap: 20px; }
  .project-card { grid-template-columns: 70px 1fr; }
  .project-status { grid-column: 2; width: fit-content; }
}

@media (max-width: 720px) {
  .site-header {
    min-height: 70px;
    grid-template-columns: 1fr auto;
  }

  .site-header nav { display: none; }
  .theme-toggle { grid-column: 2; }
  .hero { min-height: auto; padding-top: 30px; }
  .clock-stage { border-radius: 20px; }
  .clock { margin: 50px 0; gap: 5px; }
  .flip-card {
    --card-height: clamp(84px, 27vw, 120px);
    width: clamp(52px, 18vw, 76px);
    font-size: clamp(67px, 24vw, 98px);
  }
  .colon { font-size: 50px; }
  .clock-meta span:last-child { display: none; }
  .project-card { grid-template-columns: 42px 1fr; gap: 14px; }
  .about-section { grid-template-columns: 1fr; }
  .orbit-mark { width: min(78vw, 400px); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}