:root {
  --concrete: #e8e7e3;
  --panel: #f6f5f2;
  --graphite: #1c1f24;
  --steel: #5b6068;
  --seam: #cfcdc6;
  --brass: #b5873a;
  --brass-dark: #8a6427;
  --glow: #ffb547;
  --signal: #c8412b;
  --din: "DIN Condensed", "DIN Alternate", "Bahnschrift", "Arial Narrow", sans-serif;
  --text: "Iowan Old Style", "Sitka Text", Georgia, serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--concrete);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--graphite);
  font: 18px/1.7 var(--text);
}

h1,
h2 {
  font-family: var(--din);
  font-weight: 700;
  line-height: 1.02;
  margin: 0 0 16px;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(42px, 6.4vw, 82px);
}

h2 {
  font-size: clamp(28px, 3vw, 36px);
}

p {
  margin: 0 0 16px;
}

a {
  color: var(--brass-dark);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--graphite);
}

a:focus-visible {
  outline: 3px solid var(--glow);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 10px;
  top: -50px;
  background: var(--panel);
  padding: 8px 12px;
}

.skip:focus {
  top: 10px;
}

.notice {
  margin: 0;
  padding: 9px 24px;
  background: var(--graphite);
  color: #c9c7c1;
  font: 15px/1.5 var(--din);
  letter-spacing: 0.04em;
  text-align: center;
}

.notice a {
  color: var(--glow);
}

.mast {
  max-width: 1180px;
  margin: 0 auto;
  padding: 22px 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--seam);
}

.mark {
  display: flex;
  gap: 12px;
  align-items: center;
  color: var(--graphite);
  text-decoration: none;
  font: 700 26px/1 var(--din);
  text-transform: uppercase;
}

.mark small {
  display: block;
  font: 400 15px/1.3 var(--din);
  text-transform: none;
  color: var(--steel);
  letter-spacing: 0.03em;
}

.mast nav {
  display: flex;
  gap: 6px;
  font: 17px/1 var(--din);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.mast nav a {
  color: var(--graphite);
  text-decoration: none;
  padding: 9px 12px 7px;
  border: 1px solid transparent;
}

.mast nav a:hover {
  border-color: var(--seam);
}

.mast nav a[aria-current="page"] {
  background: var(--graphite);
  color: var(--glow);
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 28px 90px;
}

.lobby {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 60px;
  align-items: center;
  padding-bottom: 60px;
}

.floor-sign {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font: 18px/1 var(--din);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--steel);
  margin-bottom: 22px;
}

.floor-sign span {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: var(--graphite);
  color: var(--glow);
  font-size: 30px;
  letter-spacing: 0;
  text-shadow: 0 0 10px rgba(255, 181, 71, 0.7);
}

h1 .line {
  display: block;
}

h1 .line + .line {
  color: var(--brass-dark);
}

.intro {
  font-size: 21px;
  line-height: 1.6;
  max-width: 640px;
}

.aside {
  color: var(--steel);
  font-size: 16px;
  max-width: 600px;
}

.keycard {
  position: relative;
  background: var(--graphite);
  color: #eceae4;
  border-radius: 18px;
  padding: 0 26px 22px;
  overflow: hidden;
  box-shadow: 0 30px 40px -28px rgba(28, 31, 36, 0.8);
  transform: rotate(-3deg);
}

.keycard-strip {
  height: 38px;
  margin: 26px -26px 22px;
  background: linear-gradient(90deg, var(--brass-dark), var(--brass) 40%, #d9b06a 60%, var(--brass));
}

.keycard h2 {
  font-size: 26px;
  color: var(--glow);
}

.keycard ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 16px;
  line-height: 1.45;
}

.keycard li {
  padding: 9px 0 9px 26px;
  position: relative;
  border-top: 1px solid #33373e;
}

.keycard li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 16px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid var(--glow);
}

.keycard-foot {
  margin: 16px 0 0;
  font: 15px/1 var(--din);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #8d9098;
}

.keycard-foot b {
  color: #eceae4;
}

.building {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 56px;
  align-items: start;
  timeline-scope: --l1, --l2, --l3, --l4, --l5;
}

.lift {
  position: sticky;
  top: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px 18px;
  background: linear-gradient(160deg, #cfa760, var(--brass) 45%, var(--brass-dark));
  border-radius: 12px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4), 0 14px 24px -18px rgba(28, 31, 36, 0.9);
}

.lift-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--graphite);
  text-decoration: none;
  font: 16px/1 var(--din);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.lift-btn span {
  display: grid;
  place-items: center;
  flex: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff 0, #e9e7e1 45%, #b7b4ab 100%);
  border: 2px solid var(--brass-dark);
  font-size: 20px;
  box-shadow: 0 3px 0 var(--brass-dark);
  transition: transform 0.12s, box-shadow 0.12s;
}

.lift-btn:hover span {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--brass-dark);
}

.floors {
  max-width: 780px;
}

.floor {
  padding: 8px 0 56px;
  border-bottom: 1px dashed var(--seam);
  margin-bottom: 48px;
}

.floor:last-child {
  border-bottom: 0;
}

.f1 { view-timeline-name: --l1; }
.f2 { view-timeline-name: --l2; }
.f3 { view-timeline-name: --l3; }
.f4 { view-timeline-name: --l4; }
.f5 { view-timeline-name: --l5; }

.level {
  font: 16px/1 var(--din);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--brass-dark);
  margin-bottom: 12px;
}

.age {
  display: flex;
  gap: 20px;
  align-items: center;
  background: var(--panel);
  border-left: 6px solid var(--signal);
  padding: 16px 20px;
  margin: 8px 0 22px;
}

.age p {
  margin: 0;
  font-size: 16px;
}

.age-num {
  font: 700 54px/1 var(--din);
  color: var(--signal);
}

.hotline {
  display: inline-block;
  background: var(--graphite);
  color: var(--glow);
  text-decoration: none;
  font: 700 44px/1 var(--din);
  padding: 18px 24px 14px;
  border-radius: 10px;
  margin-bottom: 20px;
}

.hotline span {
  display: block;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #c9c7c1;
  margin-bottom: 8px;
}

.hotline:hover {
  color: #fff;
}

.page {
  max-width: 760px;
}

.page h1 {
  font-size: clamp(40px, 5vw, 64px);
}

.page h2 {
  margin-top: 40px;
  font-size: 30px;
}

.small {
  font: 16px/1.4 var(--din);
  letter-spacing: 0.06em;
  color: var(--steel);
}

.facts {
  background: var(--panel);
  border-left: 6px solid var(--brass);
  padding: 18px 22px;
  margin: 24px 0;
}

.facts dt {
  font: 15px/1.4 var(--din);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel);
  margin-top: 12px;
}

.facts dt:first-child {
  margin-top: 0;
}

.facts dd {
  margin: 2px 0 0;
}

.foot {
  background: var(--graphite);
  color: #c9c7c1;
  font-size: 15px;
  line-height: 1.6;
}

.foot a {
  color: var(--glow);
}

.foot-cols {
  max-width: 1180px;
  margin: 0 auto;
  padding: 46px 28px 10px;
  display: grid;
  grid-template-columns: 1fr 1.7fr;
  gap: 46px;
}

.foot-name {
  font: 700 24px/1.1 var(--din);
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 8px;
}

.foot-links a {
  margin-right: 16px;
}

.foot-note {
  color: #9da0a7;
}

.foot-line {
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 28px 30px;
  border-top: 1px solid #33373e;
  font: 15px/1 var(--din);
  letter-spacing: 0.06em;
}

.denied {
  min-height: 100vh;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 24px;
}

.denied h1 {
  font-size: 96px;
  margin-bottom: 0;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateX(80px) rotate(10deg);
  }
  to {
    opacity: 1;
    transform: rotate(-3deg);
  }
}

@keyframes ding {
  0%,
  100% {
    color: var(--glow);
  }
  40% {
    color: #fff;
    text-shadow: 0 0 18px var(--glow);
  }
}

@keyframes lit {
  0%,
  100% {
    background: radial-gradient(circle at 35% 30%, #fff 0, #e9e7e1 45%, #b7b4ab 100%);
    color: var(--graphite);
  }
  15%,
  85% {
    background: radial-gradient(circle at 35% 30%, #fff3d6 0, var(--glow) 55%, #e0902a 100%);
    color: var(--graphite);
    box-shadow: 0 3px 0 var(--brass-dark), 0 0 16px 2px rgba(255, 181, 71, 0.85);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .floor-sign span {
    animation: ding 1.6s ease 0.3s both;
  }

  h1 .line {
    animation: rise 0.8s cubic-bezier(0.2, 0.7, 0.2, 1) both;
  }

  h1 .line + .line {
    animation-delay: 0.18s;
  }

  .intro {
    animation: rise 0.8s cubic-bezier(0.2, 0.7, 0.2, 1) 0.32s both;
  }

  .aside {
    animation: rise 0.8s cubic-bezier(0.2, 0.7, 0.2, 1) 0.42s both;
  }

  .keycard {
    animation: card-in 1s cubic-bezier(0.2, 0.8, 0.2, 1) 0.35s both;
  }

  @supports (animation-timeline: view()) {
    .floor {
      animation: rise linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 45%;
    }

    .b1 span { animation: lit linear both; animation-timeline: --l1; }
    .b2 span { animation: lit linear both; animation-timeline: --l2; }
    .b3 span { animation: lit linear both; animation-timeline: --l3; }
    .b4 span { animation: lit linear both; animation-timeline: --l4; }
    .b5 span { animation: lit linear both; animation-timeline: --l5; }

    .lift-btn span {
      animation-range: cover 38% cover 64%;
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media (max-width: 960px) {
  .lobby {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .keycard {
    max-width: 360px;
  }

  .building {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .lift {
    top: 0;
    z-index: 2;
    flex-direction: row;
    justify-content: space-between;
    padding: 12px 14px;
    border-radius: 0 0 12px 12px;
  }

  .lift-btn {
    flex-direction: column;
    gap: 6px;
    font-size: 12px;
  }

  .lift-btn span {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }

  .floor {
    scroll-margin-top: 90px;
  }

  .foot-cols {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 17px;
  }

  main {
    padding: 28px 18px 70px;
  }

  .mast {
    padding: 18px;
  }

  .intro {
    font-size: 19px;
  }

  .hotline {
    font-size: 36px;
  }

  .age-num {
    font-size: 44px;
  }
}