:root {
  --berkeley-blue: #002676;
  --founders-rock: #3b7ea1;
  --california-gold: #fdb515;
  --medalist: #6f3f00;
  --bay-fog: #ddd5c7;
  --ink: #1f2933;
  --muted: #52606d;
  --line: #d9e2ec;
  --surface: #ffffff;
  --soft: #f5f7fa;
  --success: #0b6b45;
  --warning: #8a4b00;
  --error: #8f1d21;
  color-scheme: light;
  font-family: Arial, Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  line-height: 1.55;
}

a {
  color: var(--berkeley-blue);
}

a:hover {
  color: #00194d;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--california-gold);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  background: var(--california-gold);
  color: #111;
  padding: .65rem .9rem;
  font-weight: 700;
}

.skip-link:focus {
  top: 1rem;
}

.topbar {
  background: var(--berkeley-blue);
  color: white;
}

.topbar__inner,
.site-nav,
.main,
.footer__inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar__inner {
  min-height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  color: white;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: .02em;
  text-transform: uppercase;
}

.unit {
  color: #eef4ff;
  font-size: .95rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem 1.25rem;
  padding: .85rem 0;
  border-bottom: 1px solid var(--line);
}

.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
}

.site-nav a[aria-current="page"] {
  color: var(--berkeley-blue);
  border-bottom: 3px solid var(--california-gold);
}

.main {
  padding: 2.25rem 0 3.5rem;
}

h1,
h2,
h3 {
  color: var(--berkeley-blue);
  line-height: 1.18;
}

h1 {
  font-size: clamp(2.1rem, 4vw, 3.5rem);
  margin: 0 0 1rem;
}

h2 {
  font-size: 1.55rem;
  margin: 2rem 0 .8rem;
}

h3 {
  font-size: 1.15rem;
  margin: 1rem 0 .35rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
  gap: 2rem;
  align-items: start;
  padding-bottom: 1.5rem;
}

.hero__panel {
  border-left: 6px solid var(--california-gold);
  background: var(--soft);
  padding: 1.25rem;
}

.lead {
  font-size: 1.18rem;
  max-width: 68ch;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.4rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: .75rem 1rem;
  background: var(--berkeley-blue);
  color: white;
  border: 2px solid var(--berkeley-blue);
  border-radius: 4px;
  text-decoration: none;
  font-weight: 700;
}

.button:hover {
  color: white;
  background: #00194d;
}

.button--secondary {
  background: white;
  color: var(--berkeley-blue);
}

.button--secondary:hover {
  color: var(--berkeley-blue);
  background: #f0f4f8;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  gap: 2rem;
  align-items: start;
}

.content-copy {
  max-width: 52rem;
}

.section-band {
  border-top: 1px solid var(--line);
  padding-top: 1.2rem;
}

.check-list {
  padding-left: 1.2rem;
}

.check-list li {
  margin: .45rem 0;
}

.info-box {
  background: var(--soft);
  border-top: 4px solid var(--founders-rock);
  padding: 1rem;
}

.validation-layout {
  display: grid;
  grid-template-columns: minmax(280px, 430px) minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
}

.validation-form {
  border: 1px solid var(--line);
  border-top: 6px solid var(--california-gold);
  padding: 1.25rem;
  background: white;
}

.field {
  display: grid;
  gap: .35rem;
  margin-bottom: 1rem;
}

label {
  font-weight: 700;
}

.hint {
  color: var(--muted);
  font-size: .92rem;
  margin: 0;
}

input {
  width: 100%;
  min-height: 46px;
  padding: .7rem .8rem;
  border: 1px solid #9fb3c8;
  border-radius: 4px;
  font: inherit;
}

input:focus {
  outline: 3px solid rgba(253, 181, 21, .45);
  border-color: var(--berkeley-blue);
}

input[aria-invalid="true"] {
  border-color: var(--error);
  box-shadow: 0 0 0 2px rgba(143, 29, 33, .18);
}

button {
  min-height: 46px;
  border: 0;
  border-radius: 4px;
  padding: .75rem 1rem;
  background: var(--berkeley-blue);
  color: white;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: #00194d;
}

button:disabled {
  background: #6b7c93;
  cursor: wait;
}

.result {
  min-height: 160px;
  border: 1px solid var(--line);
  background: var(--soft);
  padding: 1.25rem;
}

.form-errors {
  border-left: 4px solid var(--error);
  background: #fff5f5;
  color: var(--ink);
  margin: 0 0 1rem;
  padding: .85rem 1rem;
}

.result[data-state="valid"] {
  border-top: 6px solid var(--success);
  background: #f1fbf6;
}

.result[data-state="neutral"] {
  border-top: 6px solid var(--warning);
  background: #fffaf0;
}

.result[data-state="error"] {
  border-top: 6px solid var(--error);
  background: #fff5f5;
}

.result table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  margin-top: 1rem;
}

.result th,
.result td {
  border: 1px solid var(--line);
  padding: .65rem;
  text-align: left;
  vertical-align: top;
}

.result th {
  width: 32%;
  color: var(--berkeley-blue);
}

.logo-strip {
  margin-top: 1.25rem;
  font-size: .92rem;
  color: var(--muted);
}

.footer {
  border-top: 1px solid var(--line);
  background: #f0f4f8;
  color: var(--ink);
}

.footer__inner {
  padding: 1.5rem 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: .92rem;
}

.footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
}

@media (max-width: 780px) {
  .hero,
  .content-grid,
  .validation-layout {
    grid-template-columns: 1fr;
  }

  .topbar__inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: .85rem 0;
  }
}

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