/* Star Bike — Website #104
   Cycle Shop × Spoke-Star Technical Modernism
   Fully offline. HTML + CSS only. */

:root {
  --white: #f6f7f3;
  --paper: #fbfcf8;
  --graphite: #252a2c;
  --blue: #2f63e8;
  --yellow: #f0d52f;
  --steel: #929da3;
  --navy: #162c46;
  --line: rgba(37,42,44,.14);
  --sans: Arial, Helvetica, sans-serif;
  --mono: "Courier New", Courier, monospace;
  --shadow: 0 18px 44px rgba(24,32,38,.09);
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--graphite);
  background:
    linear-gradient(180deg, rgba(47,99,232,.04), transparent 18rem),
    var(--white);
  font-family: var(--sans);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 999;
  padding: .7rem 1rem;
  background: var(--navy);
  color: var(--paper);
  text-decoration: none;
  transform: translateY(-160%);
}

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

.shell {
  width: min(1160px, calc(100% - 40px));
  margin-inline: auto;
}

.section {
  padding: 5rem 0;
  scroll-margin-top: 7rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(246,247,243,.95);
  backdrop-filter: blur(10px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: grid;
  line-height: 1;
  text-decoration: none;
}

.brand-main {
  font-size: 1.16rem;
  font-weight: 900;
  letter-spacing: -.015em;
  text-transform: uppercase;
}

.brand-sub {
  margin-top: .25rem;
  color: var(--blue);
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .11em;
}

.main-nav,
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
}

.main-nav a,
.footer-nav a {
  text-decoration: none;
  font-size: .78rem;
  letter-spacing: .04em;
}

.main-nav a {
  padding: .45rem 0;
  border-bottom: 1px solid transparent;
}

.main-nav a:hover,
.main-nav a:focus-visible,
.footer-nav a:hover,
.footer-nav a:focus-visible {
  color: var(--blue);
  border-color: currentColor;
}

.hero {
  padding: 4.7rem 0 5.4rem;
  scroll-margin-top: 7rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, .95fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
}

.eyebrow {
  margin: 0 0 .8rem;
  color: var(--blue);
  font-family: var(--mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.tech-strip {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: .75rem;
  align-items: center;
  max-width: 580px;
  margin-bottom: 1rem;
  color: var(--steel);
  font-family: var(--mono);
  font-size: .64rem;
  letter-spacing: .08em;
}

.tech-rule {
  height: 1px;
  background: var(--line);
}

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

h1,
h2 {
  font-weight: 900;
  letter-spacing: -.055em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin-bottom: 1.3rem;
  font-size: clamp(3.5rem, 7.2vw, 6.9rem);
  line-height: .93;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2.3rem, 4.8vw, 4.1rem);
  line-height: .97;
}

h3 {
  margin-bottom: .45rem;
  font-size: 1.35rem;
}

p {
  margin-top: 0;
  color: #5c6163;
}

.hero-text {
  max-width: 650px;
  margin-bottom: 1.8rem;
  font-size: 1.04rem;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: .82rem 1.3rem;
  border: 1px solid var(--navy);
  background: var(--navy);
  color: var(--paper);
  text-decoration: none;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
  transition: transform .2s ease, box-shadow .2s ease;
}

.cta:hover,
.cta:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(22,44,70,.18);
}

.hero-note {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: .9rem;
  max-width: 560px;
  margin-top: 2rem;
}

.hub-glyph {
  position: relative;
  width: 42px;
  height: 42px;
  border: 3px solid var(--blue);
  border-radius: 50%;
}

.hub-glyph::before,
.hub-glyph::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--yellow);
  transform-origin: center;
}

.hub-glyph::before {
  width: 2px;
  height: 50px;
  transform: translate(-50%, -50%) rotate(45deg);
}

.hub-glyph::after {
  width: 50px;
  height: 2px;
  transform: translate(-50%, -50%) rotate(45deg);
}

.hero-note p {
  margin-bottom: 0;
  font-family: var(--mono);
  font-size: .75rem;
}

.hero-visual {
  position: relative;
  min-height: 530px;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(145deg, rgba(47,99,232,.05), transparent 58%),
    var(--paper);
  box-shadow: var(--shadow);
}

.technical-grid {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(37,42,44,.04) 1px, transparent 1px) 0 0 / 36px 36px,
    linear-gradient(90deg, rgba(37,42,44,.04) 1px, transparent 1px) 0 0 / 36px 36px;
}

.spoke-system {
  position: absolute;
  left: 52%;
  top: 50%;
  width: 300px;
  height: 300px;
  transform: translate(-50%, -50%);
}

.outer-ring,
.inner-ring {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.outer-ring {
  width: 290px;
  height: 290px;
  border: 4px solid var(--navy);
}

.inner-ring {
  width: 140px;
  height: 140px;
  border: 3px dashed var(--yellow);
}

.hub {
  position: absolute;
  left: 50%;
  top: 50%;
  display: grid;
  place-items: center;
  width: 74px;
  height: 74px;
  border-radius: 50%;
  background: var(--blue);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 700;
  transform: translate(-50%, -50%);
  z-index: 3;
}

.spoke {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 2px;
  height: 138px;
  background: var(--steel);
  transform-origin: center bottom;
}

.sp1 { transform: translate(-50%, -100%) rotate(0deg); }
.sp2 { transform: translate(-50%, -100%) rotate(45deg); }
.sp3 { transform: translate(-50%, -100%) rotate(90deg); }
.sp4 { transform: translate(-50%, -100%) rotate(135deg); }
.sp5 { transform: translate(-50%, -100%) rotate(180deg); }
.sp6 { transform: translate(-50%, -100%) rotate(225deg); }
.sp7 { transform: translate(-50%, -100%) rotate(270deg); }
.sp8 { transform: translate(-50%, -100%) rotate(315deg); }

.star-label {
  position: absolute;
  left: 28px;
  top: 28px;
  width: 220px;
  padding: 1rem;
  border: 1px solid var(--graphite);
  background: rgba(246,247,243,.94);
}

.star-label span,
.star-label strong { display: block; }

.label-kicker {
  color: var(--blue);
  font-family: var(--mono);
  font-size: .58rem;
  letter-spacing: .1em;
}

.star-label strong {
  margin: .25rem 0;
  font-size: .98rem;
  letter-spacing: .06em;
}

.star-label > span:last-child {
  color: var(--steel);
  font-family: var(--mono);
  font-size: .56rem;
}

.route-line {
  position: absolute;
  height: 5px;
}

.route-a {
  left: 32px;
  bottom: 42px;
  width: 38%;
  background: var(--blue);
}

.route-b {
  right: 0;
  top: 84px;
  width: 34%;
  background: var(--yellow);
}

.measure-label {
  position: absolute;
  color: var(--steel);
  font-family: var(--mono);
  font-size: .56rem;
}

.ml-a {
  right: 18px;
  top: 190px;
  transform: rotate(90deg);
}

.ml-b {
  right: 24px;
  bottom: 22px;
}

.about-section {
  background:
    linear-gradient(90deg, rgba(146,157,163,.09), transparent 34%),
    #fbfcf8;
}

.about-grid {
  display: grid;
  grid-template-columns: 70px .9fr 1.1fr;
  gap: clamp(1.8rem, 4vw, 4rem);
  align-items: start;
}

.section-index {
  color: var(--steel);
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
}

.about-copy {
  padding-top: 1.35rem;
  border-top: 1px solid var(--line);
}

.about-copy p { font-size: 1.02rem; }

.section-heading {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: clamp(1.8rem, 4vw, 4rem);
  margin-bottom: 2rem;
}

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

.radial-module {
  position: relative;
  min-height: 315px;
  padding: 1.15rem;
  border: 1px solid var(--line);
  background: var(--paper);
}

.module-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.4rem;
}

.module-id {
  color: var(--navy);
  font-family: var(--mono);
  font-size: .62rem;
}

.mini-hub {
  width: 22px;
  height: 22px;
  border: 5px solid;
  border-radius: 50%;
}

.blue-hub { border-color: var(--blue); }
.yellow-hub { border-color: var(--yellow); }
.navy-hub { border-color: var(--navy); }

.radial-mark {
  position: relative;
  width: 66px;
  height: 66px;
  margin-bottom: 1.35rem;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.radial-mark::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
}

.radial-mark i {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 2px;
  height: 31px;
  background: currentColor;
  transform-origin: bottom;
}

.radial-mark i:nth-child(1) { transform: translate(-50%, -100%) rotate(0deg); }
.radial-mark i:nth-child(2) { transform: translate(-50%, -100%) rotate(45deg); }
.radial-mark i:nth-child(3) { transform: translate(-50%, -100%) rotate(90deg); }
.radial-mark i:nth-child(4) { transform: translate(-50%, -100%) rotate(135deg); }

.mark-blue { color: var(--blue); }
.mark-yellow { color: #b9a51e; }
.mark-navy { color: var(--navy); }

.radial-module h3 {
  font-size: 1.35rem;
  font-weight: 900;
  text-transform: uppercase;
}

.radial-module p { margin-bottom: 2.5rem; }

.module-foot {
  position: absolute;
  left: 1.15rem;
  right: 1.15rem;
  bottom: 1rem;
  padding-top: .7rem;
  border-top: 1px solid var(--line);
  color: var(--steel);
  font-family: var(--mono);
  font-size: .58rem;
}

.process-section {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.process-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid var(--line);
  background:
    linear-gradient(rgba(37,42,44,.035) 1px, transparent 1px) 0 0 / 30px 30px,
    linear-gradient(90deg, rgba(37,42,44,.035) 1px, transparent 1px) 0 0 / 30px 30px,
    #eef0ef;
}

.process-heading {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: clamp(1.8rem, 4vw, 4rem);
  max-width: 860px;
  margin-bottom: 3rem;
}

.process-heading p:last-child { max-width: 700px; }

.process-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.process-step {
  position: relative;
  min-height: 190px;
  padding: 1.2rem;
  border: 1px solid var(--line);
  background: rgba(251,252,248,.86);
}

.process-no {
  display: block;
  margin-bottom: 1rem;
  color: var(--blue);
  font-family: var(--mono);
  font-size: .64rem;
}

.process-hub {
  display: block;
  width: 46px;
  height: 46px;
  margin-bottom: 1rem;
  border: 4px solid var(--navy);
  border-radius: 50%;
  box-shadow: inset 0 0 0 8px var(--paper), inset 0 0 0 10px var(--yellow);
}

.process-step strong {
  display: block;
  font-size: 1.1rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.process-ray {
  display: block;
  width: 58px;
  height: 3px;
  margin-top: .75rem;
  background: var(--blue);
  transform: rotate(-12deg);
}

.process-step small {
  position: absolute;
  left: 1.2rem;
  bottom: 1rem;
  color: var(--steel);
  font-family: var(--mono);
  font-size: .58rem;
}

.process-stripe {
  position: absolute;
  right: 0;
  height: 6px;
  opacity: .42;
}

.ps-a {
  top: 82px;
  width: 34%;
  background: var(--blue);
}

.ps-b {
  bottom: 76px;
  width: 48%;
  background: var(--yellow);
}

.process-star {
  position: absolute;
  right: 5%;
  top: 10%;
  width: 120px;
  height: 120px;
  opacity: .14;
}

.process-star::before {
  content: "";
  position: absolute;
  inset: 34px;
  border: 8px solid var(--navy);
  border-radius: 50%;
}

.process-star i {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 3px;
  height: 60px;
  background: var(--navy);
  transform-origin: bottom;
}

.process-star i:nth-child(1) { transform: translate(-50%, -100%) rotate(0deg); }
.process-star i:nth-child(2) { transform: translate(-50%, -100%) rotate(30deg); }
.process-star i:nth-child(3) { transform: translate(-50%, -100%) rotate(60deg); }
.process-star i:nth-child(4) { transform: translate(-50%, -100%) rotate(90deg); }
.process-star i:nth-child(5) { transform: translate(-50%, -100%) rotate(120deg); }
.process-star i:nth-child(6) { transform: translate(-50%, -100%) rotate(150deg); }

.closing-section { background: #f0f1ed; }

.closing-grid {
  display: grid;
  grid-template-columns: 1fr minmax(330px, .8fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
}

.closing-copy { max-width: 700px; }

.closing-art {
  position: relative;
  min-height: 280px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper);
}

.closing-ring {
  position: absolute;
  right: 42px;
  top: 36px;
  width: 170px;
  height: 170px;
  border: 4px solid var(--navy);
  border-radius: 50%;
}

.closing-hub {
  position: absolute;
  right: 102px;
  top: 96px;
  z-index: 3;
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--blue);
  color: var(--paper);
  font-family: var(--mono);
  font-size: .75rem;
}

.closing-spoke {
  position: absolute;
  right: 126px;
  top: 121px;
  width: 2px;
  height: 80px;
  background: var(--steel);
  transform-origin: top;
}

.cs1 { transform: rotate(0deg); }
.cs2 { transform: rotate(45deg); }
.cs3 { transform: rotate(90deg); }
.cs4 { transform: rotate(135deg); }

.closing-card {
  position: absolute;
  left: 26px;
  top: 26px;
  width: 220px;
  padding: 1rem;
  border: 1px solid var(--graphite);
  background: rgba(246,247,243,.94);
}

.closing-card span,
.closing-card strong,
.closing-card small { display: block; }

.closing-card span,
.closing-card small {
  font-family: var(--mono);
  font-size: .58rem;
  letter-spacing: .08em;
}

.closing-card span { color: var(--blue); }

.closing-card strong {
  margin: .25rem 0;
  font-size: 1rem;
  letter-spacing: .06em;
}

.closing-route {
  position: absolute;
  left: 34px;
  bottom: 34px;
  height: 5px;
}

.cr-a {
  width: 44%;
  background: var(--blue);
}

.cr-b {
  width: 28%;
  bottom: 54px;
  background: var(--yellow);
}

.legal-section { background: #e3e6e1; }

.legal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.legal-card {
  padding: 2rem;
  border: 1px solid var(--line);
  background: rgba(251,252,248,.68);
}

.legal-card h2 {
  font-size: clamp(2rem, 3.4vw, 3rem);
  text-transform: none;
  letter-spacing: -.03em;
}

.legal-card p:last-child { margin-bottom: 0; }

.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--line);
  background: #e3e6e1;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
}

.footer-brand {
  display: grid;
  gap: .15rem;
}

.footer-brand strong {
  font-size: 1rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.footer-brand span {
  color: var(--blue);
  font-family: var(--mono);
  font-size: .6rem;
}

@media (max-width: 980px) {
  .header-inner {
    min-height: auto;
    padding: 1rem 0;
    align-items: flex-start;
    flex-direction: column;
    gap: .7rem;
  }

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

  .hero-visual { min-height: 450px; }

  .about-grid { grid-template-columns: 56px 1fr; }
  .about-copy { grid-column: 2; }

  .module-grid { grid-template-columns: 1fr; }
  .radial-module { min-height: 245px; }

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

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

@media (max-width: 700px) {
  .shell { width: min(100% - 28px, 1160px); }
  .section { padding: 4rem 0; }

  h1 { font-size: clamp(3rem, 15vw, 4.8rem); }
  h2 { font-size: clamp(2.1rem, 10vw, 3rem); }

  .hero { padding-top: 3rem; }

  .tech-strip { grid-template-columns: 1fr; }
  .tech-rule { display: none; }

  .hero-visual { min-height: 380px; }

  .spoke-system {
    width: 230px;
    height: 230px;
  }

  .outer-ring {
    width: 220px;
    height: 220px;
  }

  .inner-ring {
    width: 104px;
    height: 104px;
  }

  .hub {
    width: 58px;
    height: 58px;
  }

  .spoke { height: 104px; }

  .star-label {
    left: 20px;
    top: 20px;
    width: 190px;
  }

  .about-grid,
  .section-heading,
  .process-heading {
    grid-template-columns: 1fr;
    gap: .8rem;
  }

  .about-copy { grid-column: auto; }

  .process-grid { grid-template-columns: 1fr; }
  .process-step { min-height: 145px; }

  .process-star {
    right: -16px;
    top: 18px;
    transform: scale(.74);
  }

  .footer-grid {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .main-nav {
    display: grid;
    grid-template-columns: repeat(3, auto);
    justify-content: start;
    gap: .55rem 1rem;
  }

  .main-nav a { font-size: .72rem; }

  .hero-visual { min-height: 350px; }

  .star-label {
    max-width: 62%;
    padding: .8rem;
  }

  .closing-card {
    left: 18px;
    top: 18px;
    max-width: 62%;
  }

  .closing-ring { right: 24px; }

  .legal-card,
  .process-panel {
    padding: 1.35rem;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}