:root {
  --ink: #161a21;
  --muted: #5f6673;
  --line: #dfe4ea;
  --paper: #f6f7f9;
  --surface: #ffffff;
  --brand: #0b6b75;
  --brand-strong: #0f3f46;
  --accent: #f5b84b;
  --coral: #d95f45;
  --green: #25835c;
  --shadow: 0 18px 50px rgba(22, 26, 33, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
}

p {
  color: var(--muted);
  line-height: 1.7;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: 5rem;
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  max-width: 820px;
  font-size: 2.6rem;
  line-height: 1.06;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.25;
}

.section-inner {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 22px;
  align-items: center;
  padding: 16px clamp(18px, 5vw, 64px);
  border-bottom: 1px solid rgba(223, 228, 234, 0.82);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.site-menu {
  display: contents;
}

.brand {
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 900;
  text-decoration: none;
}

.brand::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 9px;
  background: var(--accent);
  clip-path: polygon(50% 0, 61% 35%, 98% 35%, 68% 56%, 79% 91%, 50% 70%, 21% 91%, 32% 56%, 2% 35%, 39% 35%);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--ink);
  transition: transform 160ms ease, opacity 160ms ease;
}

.menu-toggle span + span {
  margin-top: 4px;
}

.site-nav {
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.92rem;
}

.site-nav-auth {
  justify-content: flex-end;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--brand);
}

.site-nav-auth form {
  margin: 0;
}

.nav-user {
  color: var(--ink);
  font-weight: 650;
}

.link-button {
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
}

.flash-messages {
  max-width: 920px;
  margin: 24px auto 0;
  padding: 0 18px;
}

.flash-messages ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.flash-messages li {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 14px 16px;
}

.hero {
  position: relative;
  display: grid;
  min-height: 720px;
  align-items: end;
  padding: 96px 0 34px;
  background: #111827 url("../img/codestar-hero-v1.png") center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10, 14, 20, 0.94) 0%, rgba(10, 14, 20, 0.78) 43%, rgba(10, 14, 20, 0.34) 78%),
    linear-gradient(0deg, rgba(10, 14, 20, 0.74) 0%, rgba(10, 14, 20, 0.04) 45%);
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.hero-copy h1 {
  max-width: 740px;
}

.hero-lead {
  max-width: 720px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 1.14rem;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--brand);
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  padding: 12px 18px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
}

.button:hover {
  background: var(--brand-strong);
}

.button-ghost {
  border-color: rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.button-ghost:hover {
  background: rgba(255, 255, 255, 0.16);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 920px;
  margin: 72px 0 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
}

.hero-metrics div {
  min-height: 126px;
  padding: 24px;
  background: rgba(8, 12, 18, 0.48);
}

.hero-metrics dt {
  margin: 0 0 9px;
  color: #fff;
  font-size: 1.8rem;
  font-weight: 900;
}

.hero-metrics dd {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
  line-height: 1.55;
}

.intro-band,
.section-block,
.product-band,
.contact-band {
  padding: 88px 0;
}

.page-hero {
  padding: 96px 0 74px;
  background: var(--ink);
  color: #fff;
}

.page-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.72fr);
  gap: 56px;
  align-items: end;
}

.page-hero h1 {
  max-width: 850px;
  font-size: 4rem;
}

.page-hero p:not(.eyebrow) {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 1.08rem;
}

.intro-band {
  background: var(--surface);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
  gap: 64px;
  align-items: start;
}

.intro-grid p {
  margin: 0;
  font-size: 1.08rem;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading p:not(.eyebrow) {
  margin-bottom: 0;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.service-grid article,
.product-list article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 26px;
}

.service-grid article {
  min-height: 270px;
}

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

.service-grid-wide article {
  min-height: 300px;
}

.service-grid h2 {
  margin: 0;
  font-size: 1.42rem;
  line-height: 1.18;
}

.service-grid-compact article {
  min-height: 270px;
}

.service-index,
.product-kicker {
  display: block;
  margin-bottom: 42px;
  color: var(--coral);
  font-size: 0.82rem;
  font-weight: 850;
}

.service-grid p,
.product-list p {
  margin-bottom: 0;
}

.product-list a {
  display: inline-flex;
  margin-top: 18px;
  color: var(--brand);
  font-weight: 800;
  text-decoration: none;
}

.product-list a:hover {
  color: var(--brand-strong);
}

.section-actions {
  margin-top: 28px;
}

.dark-link {
  color: var(--ink);
  text-decoration-color: rgba(22, 26, 33, 0.32);
}

.product-band {
  background: #e9eef1;
}

.product-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.75fr);
  gap: 54px;
  align-items: start;
}

.product-layout h2 {
  margin-bottom: 20px;
}

.product-list {
  display: grid;
  gap: 16px;
}

.product-kicker {
  margin-bottom: 18px;
  color: var(--green);
  text-transform: uppercase;
}

.product-showcase {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.product-showcase article {
  display: grid;
  gap: 20px;
  align-content: start;
  min-height: 380px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 32px;
}

.product-showcase h2,
.contact-page-grid h2 {
  font-size: 2rem;
}

.product-showcase p {
  margin: 0;
}

.work-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr);
  gap: 48px;
}

.timeline {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.timeline li {
  position: relative;
  display: grid;
  gap: 8px;
  border-left: 4px solid var(--accent);
  background: var(--surface);
  padding: 22px 24px;
  box-shadow: 0 1px 0 rgba(22, 26, 33, 0.04);
}

.timeline strong {
  font-size: 1.02rem;
}

.timeline span {
  color: var(--muted);
  line-height: 1.65;
}

.contact-band {
  background: var(--ink);
  color: #fff;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 40px;
  align-items: end;
}

.contact-layout h2 {
  max-width: 850px;
}

.contact-layout p:not(.eyebrow) {
  max-width: 760px;
  color: rgba(255, 255, 255, 0.76);
}

.plain-link {
  color: #fff;
  font-weight: 800;
  text-decoration-color: rgba(255, 255, 255, 0.38);
  text-underline-offset: 5px;
}

.contact-page-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.7fr);
  gap: 20px;
  align-items: start;
}

.contact-page-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 32px;
}

.clean-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  color: var(--muted);
  line-height: 1.65;
  list-style: none;
}

.clean-list li {
  position: relative;
  padding-left: 22px;
}

.clean-list li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.page-content {
  max-width: 920px;
  margin: 48px auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 28px;
}

.auth-shell {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 24px;
  max-width: 1100px;
}

.auth-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 32px;
}

.auth-panel.is-accent {
  background: linear-gradient(180deg, #ffffff, #eff7f7);
}

.auth-intro {
  display: grid;
  gap: 18px;
}

.auth-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  color: var(--muted);
}

.auth-links a {
  color: var(--brand);
  font-weight: 700;
  text-decoration: none;
}

.auth-form {
  display: grid;
  gap: 18px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field-group {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-weight: 650;
}

.field-group input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  font: inherit;
}

.field-group small {
  color: var(--muted);
  font-weight: 400;
}

.field-group .field-error {
  color: #b42318;
}

.field-group input.is-invalid {
  border-color: #d92d20;
  box-shadow: 0 0 0 1px rgba(217, 45, 32, 0.08);
}

.form-error-summary {
  border: 1px solid #f7b6b2;
  border-radius: 8px;
  background: #fff4f3;
  padding: 14px 16px;
}

.form-error-summary strong {
  display: block;
  margin-bottom: 8px;
}

.form-error-summary ul {
  margin: 0;
  padding-left: 18px;
}

.form-actions {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

@media (max-width: 980px) {
  h1 {
    font-size: 4rem;
  }

  h2 {
    font-size: 2.1rem;
  }

  .site-header {
    grid-template-columns: 1fr;
  }

  .site-nav,
  .site-nav-auth {
    justify-content: flex-start;
  }

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

  .intro-grid,
  .product-layout,
  .work-grid,
  .contact-layout,
  .page-hero-grid,
  .contact-page-grid {
    grid-template-columns: 1fr;
  }

  .page-hero h1 {
    font-size: 3.2rem;
  }
}

@media (max-width: 680px) {
  h1 {
    font-size: 2.72rem;
  }

  h2 {
    font-size: 1.68rem;
  }

  .section-inner {
    width: min(100% - 28px, 1180px);
  }

  .site-header {
    position: sticky;
    grid-template-columns: 1fr auto;
    gap: 0 12px;
    padding: 14px;
  }

  .menu-toggle {
    display: grid;
  }

  .site-header.is-open .menu-toggle span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .site-header.is-open .menu-toggle span:nth-child(2) {
    opacity: 0;
  }

  .site-header.is-open .menu-toggle span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .site-menu {
    display: none;
    grid-column: 1 / -1;
    gap: 0;
    margin-top: 14px;
    border-top: 1px solid var(--line);
    background: var(--surface);
  }

  .site-header.is-open .site-menu {
    display: grid;
  }

  .site-nav {
    width: 100%;
    gap: 0;
    justify-content: flex-start;
    align-items: stretch;
    flex-direction: column;
  }

  .site-nav a,
  .site-nav .link-button {
    display: flex;
    width: 100%;
    min-height: 46px;
    align-items: center;
    border-bottom: 1px solid var(--line);
    color: var(--ink);
    font-weight: 750;
  }

  .site-nav-auth {
    margin-top: 4px;
  }

  .site-nav-auth a,
  .site-nav-auth .link-button {
    color: var(--muted);
    font-weight: 700;
  }

  .hero {
    min-height: auto;
    padding: 64px 0 28px;
    background-position: 64% center;
  }

  .hero-lead {
    font-size: 1rem;
  }

  .hero-actions,
  .contact-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .page-hero {
    padding: 62px 0 48px;
  }

  .page-hero h1 {
    font-size: 2.45rem;
  }

  .hero-metrics,
  .service-grid,
  .service-grid-wide,
  .product-showcase {
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    margin-top: 34px;
  }

  .hero-metrics div {
    min-height: auto;
    padding: 18px;
  }

  .intro-band,
  .section-block,
  .product-band,
  .contact-band {
    padding: 54px 0;
  }

  .service-grid article,
  .service-grid-wide article,
  .product-showcase article {
    min-height: auto;
    padding: 22px;
  }

  .service-index {
    margin-bottom: 24px;
  }

  .product-layout {
    gap: 28px;
  }

  .timeline li,
  .contact-page-grid article {
    padding: 20px;
  }

  .auth-shell,
  .form-grid {
    grid-template-columns: 1fr;
  }
}