/* Stefan Graefe – CSO Consulting Team
   Colours come from the logo: blue #2a9bd2 and slate #45545e. The logo blue is too light
   for small text on white (3.1:1), so links and buttons use a darker shade of it. */

:root {
  --blue: #2a9bd2;        /* logo blue: rules, markers, accents */
  --blue-dark: #1a6693;   /* logo blue, darkened: links and buttons (6.2:1 on white) */
  --blue-darker: #134d70;
  --blue-light: #8fd0f0;  /* links on the dark contact band (6.8:1) */
  --slate: #45545e;       /* logo slate: body text (7.8:1 on white) */
  --slate-dark: #2e3b44;  /* headings, contact band */
  --muted: #5b6b75;
  --bg: #ffffff;
  --bg-tint: #f3f8fc;
  --line: #dbe5ec;
  --radius: 12px;
  --container: 72rem;
  --gutter: clamp(1rem, 4vw, 2rem);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  color-scheme: light;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--slate);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  overflow-wrap: break-word;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3 {
  color: var(--slate-dark);
  line-height: 1.2;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: clamp(1.75rem, 1.3rem + 1.6vw, 2.375rem);
  letter-spacing: -0.01em;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

h2::before {
  content: "";
  display: block;
  width: 3rem;
  height: 4px;
  border-radius: 2px;
  background: var(--blue);
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.1875rem;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--blue-dark);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--blue-darker);
}

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -10rem;
  z-index: 10;
  padding: 0.6rem 1rem;
  background: var(--slate-dark);
  color: #fff;
  border-radius: 6px;
}

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

/* Header */

.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-block: 0.75rem;
}

.brand {
  flex: none;
  border-radius: 6px;
}

.brand img {
  width: auto;
  height: 104px;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: 999px;
  color: var(--slate-dark);
  font-weight: 600;
  font-size: 0.975rem;
  text-decoration: none;
}

.nav-list a:hover {
  color: var(--blue-dark);
  background: var(--bg-tint);
}

.nav-list .nav-cta {
  border: 2px solid var(--blue-dark);
  color: var(--blue-dark);
  padding-inline: 1rem;
}

.nav-list .nav-cta:hover {
  background: var(--blue-dark);
  color: #fff;
}

/* Hero */

.hero {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-tint) 100%);
  padding-block: clamp(3rem, 8vw, 6rem);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(2rem, 5vw, 4.5rem);
}

.hero-text {
  max-width: 44rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--blue-dark);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.5rem, 1.6rem + 4vw, 4.25rem);
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-bottom: 1rem;
}

.tagline {
  color: var(--slate-dark);
  font-size: clamp(1.2rem, 1rem + 0.8vw, 1.5rem);
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 1.5rem;
}

.lead {
  font-size: clamp(1.0625rem, 1rem + 0.3vw, 1.1875rem);
}

.actions {
  margin: 1.75rem 0 0;
}

.button {
  display: inline-block;
  padding: 0.85rem 1.75rem;
  border-radius: 999px;
  background: var(--blue-dark);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.15s ease;
}

.button:hover {
  background: var(--blue-darker);
  color: #fff;
}

.hero-photo {
  margin: 0;
  width: clamp(16rem, 26vw, 22rem);
}

.hero-photo img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 30%;
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgb(46 59 68 / 0.08), 0 16px 40px rgb(46 59 68 / 0.14);
}

/* Sections */

.section {
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.section-tint {
  background: var(--bg-tint);
  border-block: 1px solid var(--line);
}

.prose {
  max-width: 42rem;
}

.prose p:last-child,
.note p:last-child,
.card p:last-child,
.principles p:last-child {
  margin-bottom: 0;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 22rem);
  align-items: start;
  gap: clamp(2rem, 5vw, 4rem);
}

.note {
  background: var(--bg-tint);
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.5rem 1.5rem 1.6rem;
}

.section-tint .note {
  background: var(--bg);
}

.note h3 {
  font-size: 1.0625rem;
}

dfn {
  font-style: normal;
  font-weight: 700;
  color: var(--slate-dark);
}

/* What We Offer */

.cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem 1.75rem;
}

/* Five cards: 2 + 2 + 1 (full width) on tablets, 3 + 2 (wider) on desktops. */
@media (min-width: 40rem) {
  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .card:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 64rem) {
  .cards {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .card {
    grid-column: span 2;
  }

  .card:nth-child(4),
  .card:nth-child(5) {
    grid-column: span 3;
  }
}

/* How We Work */

.principles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem 2rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.principles li {
  position: relative;
  padding-top: 1.25rem;
  border-top: 2px solid var(--line);
}

.principles li::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 2.5rem;
  height: 2px;
  background: var(--blue);
}

.principles h3 {
  font-size: 1.125rem;
  margin-bottom: 0.4rem;
}

@media (min-width: 40rem) {
  .principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 70rem) {
  .principles {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* Contact */

.contact {
  background: var(--slate-dark);
  color: #e8eef2;
}

.contact h2 {
  color: #fff;
}

.contact a {
  color: var(--blue-light);
}

.contact a:hover {
  color: #fff;
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: start;
  gap: 2rem 4rem;
}

.contact .actions {
  margin-top: 0;
}

.contact .button-light {
  background: #fff;
  color: var(--blue-dark);
}

.contact .button-light:hover {
  background: #d7ecf8;
  color: var(--blue-darker);
}

address {
  font-style: normal;
  font-size: 1.125rem;
  line-height: 1.7;
}

address strong {
  color: #fff;
}

.contact-email {
  display: block;
  margin-top: 1rem;
}

/* Footer */

.site-footer {
  background: #26323a;
  color: #c9d3da;
  font-size: 0.9375rem;
  padding-block: 1.5rem;
}

.site-footer p {
  margin: 0;
}

/* Tablet and phone */

@media (max-width: 52rem) {
  .split,
  .contact-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .note {
    max-width: 42rem;
  }
}

@media (max-width: 44rem) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .brand img {
    height: 88px;
  }

  .nav-list {
    gap: 0.25rem;
    margin-left: -0.5rem;
  }

  .nav-list a {
    padding-inline: 0.5rem;
    font-size: 0.9375rem;
  }

  .nav-list .nav-cta {
    padding-inline: 0.75rem;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-photo {
    order: -1;
    width: min(13rem, 60%);
  }
}

@media print {
  .skip-link,
  .site-header nav,
  .actions {
    display: none;
  }

  .hero,
  .section-tint,
  .contact,
  .site-footer {
    background: none;
    color: #000;
  }

  .contact h2,
  address strong {
    color: #000;
  }
}