/* ALRS visual system — precision, restraint, depth */
:root {
  --alrs-bg: #f5f5f7;
  --alrs-surface: rgba(255, 255, 255, .78);
  --alrs-surface-solid: #ffffff;
  --alrs-text: #101114;
  --alrs-muted: #626873;
  --alrs-line: rgba(16, 17, 20, .10);
  --alrs-accent: #1478ff;
  --alrs-accent-2: #57d9ff;
  --alrs-deep: #080a0e;
  --alrs-radius: 28px;
  --alrs-shadow: 0 22px 70px rgba(16, 24, 40, .08);
  --md-default-fg-color: var(--alrs-text);
  --md-default-bg-color: var(--alrs-bg);
  --md-primary-fg-color: rgba(248, 249, 251, .82);
  --md-primary-bg-color: #101114;
  --md-accent-fg-color: var(--alrs-accent);
}

[data-md-color-scheme="slate"] {
  --alrs-bg: #050608;
  --alrs-surface: rgba(17, 20, 26, .76);
  --alrs-surface-solid: #101319;
  --alrs-text: #f4f6f8;
  --alrs-muted: #939aa6;
  --alrs-line: rgba(255, 255, 255, .10);
  --alrs-accent: #5b9cff;
  --alrs-accent-2: #75e3ff;
  --alrs-deep: #020304;
  --alrs-shadow: 0 24px 80px rgba(0, 0, 0, .34);
  --md-default-fg-color: var(--alrs-text);
  --md-default-bg-color: var(--alrs-bg);
  --md-primary-fg-color: rgba(7, 8, 10, .78);
  --md-primary-bg-color: #f4f6f8;
}

html {
  scroll-behavior: smooth;
}

body,
input {
  font-family: Inter, "SF Pro Display", "SF Pro Text", -apple-system,
    BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
  background:
    radial-gradient(circle at 78% -10%, rgba(20, 120, 255, .08), transparent 28rem),
    var(--alrs-bg);
}

::selection {
  color: #fff;
  background: var(--alrs-accent);
}

.md-grid {
  max-width: 1440px;
}

.md-header {
  color: var(--alrs-text);
  background: color-mix(in srgb, var(--alrs-bg) 78%, transparent);
  border-bottom: 1px solid var(--alrs-line);
  box-shadow: none;
  backdrop-filter: saturate(180%) blur(22px);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
}

.md-header__title {
  font-weight: 700;
  letter-spacing: -.025em;
}

.md-tabs {
  color: var(--alrs-text);
  background: color-mix(in srgb, var(--alrs-bg) 82%, transparent);
  border-bottom: 1px solid var(--alrs-line);
  backdrop-filter: blur(22px);
}

.md-tabs__link {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .02em;
  opacity: .62;
}

.md-tabs__link--active,
.md-tabs__link:hover {
  opacity: 1;
}

.md-search__form {
  border: 1px solid var(--alrs-line);
  border-radius: 999px;
  background: var(--alrs-surface);
}

.md-main__inner {
  margin-top: 0;
}

.md-content__inner {
  padding: 3.5rem 2.2rem 5rem;
}

.md-content__inner::before {
  display: none;
}

.md-typeset {
  color: var(--alrs-text);
  font-size: .78rem;
  line-height: 1.85;
}

.md-typeset h1 {
  margin: 0 0 2rem;
  color: var(--alrs-text);
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  font-weight: 760;
  line-height: 1.04;
  letter-spacing: -.055em;
}

.md-typeset h2 {
  margin-top: 3.6rem;
  padding-top: 1.4rem;
  color: var(--alrs-text);
  font-size: clamp(1.45rem, 2.8vw, 2.25rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -.035em;
  border-top: 1px solid var(--alrs-line);
}

.md-typeset h3 {
  color: var(--alrs-text);
  font-size: 1.05rem;
  font-weight: 680;
  letter-spacing: -.02em;
}

.md-typeset a {
  color: var(--alrs-accent);
}

.md-typeset blockquote {
  margin: 1.6rem 0 2.5rem;
  padding: 1.15rem 1.35rem;
  color: var(--alrs-muted);
  border: 1px solid var(--alrs-line);
  border-left: 3px solid var(--alrs-accent);
  border-radius: 0 16px 16px 0;
  background: var(--alrs-surface);
}

.md-typeset table:not([class]) {
  border: 0;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 18px;
  background: var(--alrs-surface-solid);
  box-shadow: inset 0 0 0 1px var(--alrs-line);
  overflow: hidden;
}

.md-typeset table:not([class]) th {
  padding: .85rem 1rem;
  color: var(--alrs-muted);
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  background: color-mix(in srgb, var(--alrs-surface-solid) 82%, var(--alrs-accent) 4%);
}

.md-typeset table:not([class]) td {
  padding: .9rem 1rem;
  border-top: 1px solid var(--alrs-line);
}

.md-sidebar__scrollwrap {
  scrollbar-width: thin;
}

.md-nav__link {
  border-radius: 8px;
  transition: color .2s ease, transform .2s ease;
}

.md-nav__link:hover {
  transform: translateX(2px);
}

.md-footer {
  background: var(--alrs-deep);
}

/* Homepage */
.alrs-home {
  margin: -3.5rem -2.2rem -5rem;
  color: var(--alrs-text);
}

.alrs-home * {
  box-sizing: border-box;
}

.alrs-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr);
  align-items: center;
  min-height: calc(100vh - 7.2rem);
  padding: clamp(4rem, 8vw, 8rem) clamp(2rem, 7vw, 7rem);
  overflow: hidden;
}

.alrs-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background-image:
    linear-gradient(var(--alrs-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--alrs-line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.25), transparent 82%);
  opacity: .22;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.eyebrow,
.section-heading > span,
.focus-copy > span,
.closing-section > div > span {
  display: flex;
  align-items: center;
  gap: .7rem;
  color: var(--alrs-muted);
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .15em;
}

.eyebrow > span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #42d784;
  box-shadow: 0 0 18px #42d784;
}

.alrs-home .alrs-hero h1 {
  max-width: 780px;
  margin: 1.4rem 0 1.5rem;
  font-size: clamp(3.3rem, 7.4vw, 7.4rem);
  font-weight: 760;
  line-height: .96;
  letter-spacing: -.075em;
}

.alrs-hero h1 em {
  color: transparent;
  font-style: normal;
  background: linear-gradient(100deg, var(--alrs-accent), var(--alrs-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-lead {
  max-width: 660px;
  margin: 0;
  color: var(--alrs-muted);
  font-size: clamp(.86rem, 1.5vw, 1.12rem);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 2.2rem;
}

.md-typeset .action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  min-height: 48px;
  padding: 0 1.25rem;
  color: var(--alrs-text);
  font-size: .71rem;
  font-weight: 650;
  border: 1px solid var(--alrs-line);
  border-radius: 999px;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
}

.md-typeset .action:hover {
  transform: translateY(-2px);
}

.md-typeset .action.primary {
  color: #fff;
  border-color: var(--alrs-accent);
  background: var(--alrs-accent);
  box-shadow: 0 12px 34px rgba(20, 120, 255, .25);
}

.md-typeset .action.secondary {
  background: var(--alrs-surface);
  backdrop-filter: blur(16px);
}

.hero-proof {
  display: flex;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  margin-top: 3rem;
  padding-top: 1.3rem;
  border-top: 1px solid var(--alrs-line);
}

.hero-proof div {
  display: grid;
  gap: .15rem;
}

.hero-proof strong {
  color: var(--alrs-text);
  font-size: 1.15rem;
  font-weight: 670;
}

.hero-proof span {
  color: var(--alrs-muted);
  font-size: .6rem;
}

.hero-machine {
  position: relative;
  min-height: 580px;
}

.machine-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 330px;
  height: 330px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(42, 141, 255, .28), rgba(65, 214, 255, .07) 40%, transparent 68%);
  filter: blur(10px);
  transform: translate(-50%, -50%);
}

.orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid var(--alrs-line);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit-a { width: 230px; height: 230px; animation: spin 18s linear infinite; }
.orbit-b { width: 370px; height: 370px; animation: spin 30s linear infinite reverse; }
.orbit-c { width: 520px; height: 520px; border-style: dashed; animation: spin 42s linear infinite; }

.orbit i {
  position: absolute;
  top: 50%;
  right: -4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--alrs-accent-2);
  box-shadow: 0 0 20px var(--alrs-accent-2);
}

.machine-core {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  place-content: center;
  width: 150px;
  height: 150px;
  text-align: center;
  border: 1px solid rgba(112, 194, 255, .42);
  border-radius: 50%;
  background: color-mix(in srgb, var(--alrs-surface-solid) 70%, transparent);
  box-shadow: inset 0 0 40px rgba(44, 132, 255, .12), 0 0 70px rgba(44, 132, 255, .14);
  backdrop-filter: blur(18px);
  transform: translate(-50%, -50%);
}

.machine-core span {
  font-size: 1.15rem;
  font-weight: 780;
  letter-spacing: .12em;
}

.machine-core small {
  margin-top: .25rem;
  color: #42d784;
  font-size: .42rem;
  letter-spacing: .14em;
}

.signal {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: .65rem .85rem;
  color: var(--alrs-muted);
  font-size: .5rem;
  letter-spacing: .12em;
  border: 1px solid var(--alrs-line);
  border-radius: 10px;
  background: var(--alrs-surface);
  box-shadow: var(--alrs-shadow);
  backdrop-filter: blur(16px);
}

.signal b { color: var(--alrs-accent); }
.signal-one { top: 18%; right: 4%; }
.signal-two { bottom: 21%; left: 2%; }
.signal-three { right: 5%; bottom: 9%; }

.home-section {
  padding: clamp(4.5rem, 9vw, 9rem) clamp(2rem, 7vw, 7rem);
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 1.5rem 4rem;
  align-items: end;
  margin-bottom: 3rem;
}

.section-heading > span {
  grid-column: 1 / -1;
}

.alrs-home .section-heading h2,
.alrs-home .focus-panel h2,
.alrs-home .closing-section h2 {
  margin: 0;
  padding: 0;
  color: var(--alrs-text);
  font-size: clamp(2.3rem, 5vw, 5rem);
  font-weight: 720;
  line-height: 1.03;
  letter-spacing: -.06em;
  border: 0;
}

.section-heading > p {
  max-width: 540px;
  margin: 0;
  color: var(--alrs-muted);
  font-size: .88rem;
  line-height: 1.8;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-auto-rows: minmax(230px, auto);
  gap: 1rem;
}

.bento-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 250px;
  padding: clamp(1.3rem, 2.6vw, 2.1rem);
  border: 1px solid var(--alrs-line);
  border-radius: var(--alrs-radius);
  background: var(--alrs-surface);
  box-shadow: var(--alrs-shadow);
  overflow: hidden;
  transition: transform .35s cubic-bezier(.2,.8,.2,1), border-color .35s ease;
}

.bento-card:hover {
  border-color: color-mix(in srgb, var(--alrs-accent) 42%, var(--alrs-line));
  transform: translateY(-5px);
}

.bento-card.card-wide { grid-column: span 2; }
.bento-card.card-tall { grid-row: span 2; }

.bento-card.card-accent {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(145deg, #0878ff, #42b7ff);
}

.bento-card.card-dark {
  color: #f7f8fa;
  background: #090b0f;
}

.card-index {
  color: var(--alrs-muted);
  font-size: .53rem;
  font-weight: 700;
  letter-spacing: .13em;
}

.card-accent .card-index,
.card-dark .card-index { color: rgba(255,255,255,.58); }

.bento-card h3 {
  margin: auto 0 .7rem;
  color: inherit;
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  line-height: 1.1;
  letter-spacing: -.04em;
}

.bento-card p {
  max-width: 600px;
  margin: 0;
  color: var(--alrs-muted);
  font-size: .7rem;
  line-height: 1.7;
}

.card-accent p,
.card-dark p { color: rgba(255,255,255,.66); }

.system-flow,
.chip-line,
.terminal-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  margin-top: 1.4rem;
}

.system-flow span,
.chip-line span {
  padding: .4rem .65rem;
  font-size: .56rem;
  border: 1px solid var(--alrs-line);
  border-radius: 999px;
}

.system-flow i,
.terminal-line i {
  color: var(--alrs-muted);
  font-style: normal;
}

.metric {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  margin-top: 1.5rem;
}

.metric strong { font-size: 1.3rem; letter-spacing: .06em; }
.metric span { color: rgba(255,255,255,.65); font-size: .58rem; }

.terminal-line {
  color: rgba(255,255,255,.52);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: .56rem;
}

.terminal-line b { color: #42d784; }

.radar {
  position: relative;
  width: 170px;
  height: 170px;
  margin: 2rem auto 0;
  border: 1px solid var(--alrs-line);
  border-radius: 50%;
  background: repeating-radial-gradient(circle, transparent 0 27px, var(--alrs-line) 28px 29px);
}

.radar::before,
.radar::after {
  position: absolute;
  content: "";
  background: var(--alrs-line);
}

.radar::before { top: 50%; left: 0; width: 100%; height: 1px; }
.radar::after { top: 0; left: 50%; width: 1px; height: 100%; }

.radar b {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 50%;
  height: 50%;
  background: linear-gradient(35deg, rgba(20,120,255,.35), transparent 70%);
  transform-origin: left top;
  animation: sweep 4s linear infinite;
}

.radar i {
  position: absolute;
  z-index: 2;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--alrs-accent-2);
  box-shadow: 0 0 12px var(--alrs-accent-2);
}

.radar i:nth-child(1) { top: 27%; left: 63%; }
.radar i:nth-child(2) { top: 62%; left: 31%; }
.radar i:nth-child(3) { top: 72%; left: 70%; }

.level-section {
  background: color-mix(in srgb, var(--alrs-surface-solid) 78%, transparent);
}

.section-heading.compact {
  grid-template-columns: 1.2fr .8fr;
}

.level-list {
  border-top: 1px solid var(--alrs-line);
}

.level-row {
  display: grid;
  grid-template-columns: 70px minmax(180px, .7fr) 1.3fr;
  align-items: center;
  min-height: 96px;
  border-bottom: 1px solid var(--alrs-line);
  transition: padding .3s ease, background .3s ease;
}

.level-row:hover {
  padding: 0 1rem;
  background: color-mix(in srgb, var(--alrs-accent) 4%, transparent);
}

.level-row b {
  color: var(--alrs-accent);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: .62rem;
}

.level-row strong {
  font-size: 1rem;
  letter-spacing: -.02em;
}

.level-row span {
  color: var(--alrs-muted);
  font-size: .7rem;
}

.focus-panel {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 5rem;
  margin: 1rem clamp(1rem, 3vw, 3rem);
  padding: clamp(3rem, 7vw, 7rem);
  color: #f7f8fa;
  border-radius: clamp(26px, 4vw, 48px);
  background:
    radial-gradient(circle at 15% 100%, rgba(23, 121, 255, .33), transparent 34%),
    radial-gradient(circle at 85% 0%, rgba(89, 224, 255, .12), transparent 28%),
    #07090d;
  box-shadow: 0 30px 90px rgba(0,0,0,.2);
}

.focus-copy > span { color: rgba(255,255,255,.46); }
.alrs-home .focus-panel h2 { margin-top: 1.25rem; color: #fff; }
.focus-copy p { max-width: 480px; color: rgba(255,255,255,.58); }

.md-typeset .action.light {
  margin-top: 1.2rem;
  color: #0a0b0e;
  border-color: #fff;
  background: #fff;
}

.focus-path {
  align-self: center;
  border-top: 1px solid rgba(255,255,255,.14);
}

.focus-path div {
  display: grid;
  grid-template-columns: 70px 1fr;
  align-items: center;
  min-height: 84px;
  border-bottom: 1px solid rgba(255,255,255,.14);
}

.focus-path b {
  color: #67c9ff;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: .58rem;
}

.focus-path span {
  font-size: .84rem;
  font-weight: 580;
}

.closing-section {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
}

.closing-mark {
  display: grid;
  place-content: center;
  width: 72px;
  height: 72px;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 800;
  border-radius: 20px;
  background: linear-gradient(145deg, var(--alrs-accent), #56cfff);
  box-shadow: 0 16px 38px rgba(20,120,255,.24);
}

.closing-section > div > span { margin-bottom: .9rem; }
.alrs-home .closing-section h2 { font-size: clamp(2rem, 4vw, 3.8rem); }

.md-typeset .text-link {
  display: inline-flex;
  gap: .6rem;
  white-space: nowrap;
  color: var(--alrs-text);
  font-size: .7rem;
  font-weight: 650;
  border-bottom: 1px solid var(--alrs-text);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

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

@media (max-width: 1100px) {
  .alrs-hero {
    grid-template-columns: 1fr;
  }

  .hero-machine {
    min-height: 520px;
  }

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

  .focus-panel {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 700px) {
  .md-content__inner {
    padding: 2rem 1rem 4rem;
  }

  .alrs-home {
    margin: -2rem -1rem -4rem;
  }

  .alrs-hero,
  .home-section {
    padding-right: 1.2rem;
    padding-left: 1.2rem;
  }

  .alrs-hero {
    min-height: auto;
    padding-top: 4rem;
  }

  .alrs-home .alrs-hero h1 {
    font-size: clamp(3rem, 15vw, 5rem);
  }

  .hero-machine {
    min-height: 390px;
    transform: scale(.78);
  }

  .orbit-c { width: 440px; height: 440px; }

  .section-heading,
  .section-heading.compact {
    grid-template-columns: 1fr;
  }

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

  .bento-card.card-wide,
  .bento-card.card-tall {
    grid-column: auto;
    grid-row: auto;
  }

  .level-row {
    grid-template-columns: 46px 1fr;
    gap: .25rem;
    padding: .9rem 0;
  }

  .level-row span {
    grid-column: 2;
  }

  .focus-panel {
    margin: .6rem;
    padding: 2.3rem 1.4rem;
    border-radius: 28px;
  }

  .closing-section {
    grid-template-columns: 1fr;
  }

  .closing-mark {
    width: 58px;
    height: 58px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}