/* Northfield Advisory — static one-page website */
:root {
  --ink: #18201d;
  --mist: #f2f5f2;
  --paper: #ffffff;
  --green: #35624c;
  --green-dark: #294f3d;
  --line: #c9d2cc;
  --muted: #59645e;
  --error: #9a2f2f;
  --container: 1240px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --section-space: clamp(4.75rem, 9vw, 8.5rem);
}

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

html {
  scroll-behavior: auto;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background: var(--mist);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

button,
input,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

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

::selection {
  background: var(--green);
  color: var(--paper);
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.7rem 1rem;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-150%);
}

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

.container {
  width: min(100% - (var(--gutter) * 2), var(--container));
  margin-inline: auto;
}

.site-header {
  position: relative;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: var(--mist);
}

.header-inner {
  display: grid;
  grid-template-columns: minmax(max-content, 1fr) auto minmax(max-content, 1fr);
  align-items: center;
  min-height: 72px;
  gap: 2rem;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  width: max-content;
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  text-decoration: none;
  white-space: nowrap;
}

.wordmark-mark {
  width: 0.7rem;
  height: 0.7rem;
  border: 2px solid var(--green);
  background: linear-gradient(90deg, var(--green) 50%, transparent 50%);
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 2.5vw, 2.5rem);
  white-space: nowrap;
}

.primary-nav a {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 650;
  text-decoration: none;
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
  color: var(--ink);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  width: max-content;
  max-width: 100%;
  border: 2px solid var(--green);
  border-radius: 0;
  padding: 0.75rem 1.25rem;
  background: var(--green);
  color: var(--paper);
  font-weight: 750;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}

.button:hover {
  border-color: var(--green-dark);
  background: var(--green-dark);
}

.button:active {
  transform: translateY(1px);
}

.button-small {
  justify-self: end;
  min-height: 2.75rem;
  padding-inline: 1rem;
  font-size: 0.86rem;
}

.hero {
  min-height: calc(100dvh - 73px);
  display: grid;
  align-items: center;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(360px, 0.97fr);
  align-items: stretch;
  gap: clamp(2.5rem, 6vw, 6.5rem);
  padding-block: clamp(3rem, 7vh, 5rem);
}

.hero-copy {
  align-self: center;
  padding-block: 1rem;
}

.eyebrow,
.section-code {
  margin: 0 0 1.2rem;
  color: var(--green);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  line-height: 1.3;
  text-transform: uppercase;
}

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

h1,
h2,
h3 {
  text-wrap: balance;
}

h1 {
  max-width: 11.5ch;
  margin-bottom: 1.6rem;
  font-size: clamp(3.2rem, 5.6vw, 4.65rem);
  font-weight: 620;
  letter-spacing: -0.058em;
  line-height: 0.98;
}

.hero-intro {
  max-width: 36rem;
  margin-bottom: 2.1rem;
  color: var(--muted);
  font-size: clamp(1.06rem, 1.5vw, 1.18rem);
  line-height: 1.62;
}

.hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: min(620px, 68vh);
  border: 1px solid var(--ink);
  padding: clamp(1rem, 2.4vw, 1.75rem);
  background-color: var(--paper);
  background-image:
    linear-gradient(to right, rgba(53, 98, 76, 0.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(53, 98, 76, 0.09) 1px, transparent 1px);
  background-size: 32px 32px;
}

.hero-visual::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 22%;
  height: 0.42rem;
  background: var(--green);
}

.visual-caption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-visual img {
  width: 100%;
  height: auto;
  margin: auto 0;
}

.section {
  padding-block: var(--section-space);
}

.section h2,
.engagement h2,
.contact h2 {
  margin-bottom: 1.5rem;
  font-size: clamp(2.35rem, 4.4vw, 3.6rem);
  font-weight: 620;
  letter-spacing: -0.052em;
  line-height: 1.02;
}

.section-intro p,
.focus-heading p,
.about p,
.contact-copy > p {
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.06rem;
}

.approach {
  background: var(--paper);
}

.approach-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(3rem, 9vw, 9rem);
}

.section-intro h2 {
  max-width: 11ch;
}

.approach-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ink);
}

.approach-list li {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1.5rem;
  padding: 1.8rem 0 2rem;
  border-bottom: 1px solid var(--line);
}

.step-number,
.focus-index {
  color: var(--green);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.approach-list h3 {
  margin-bottom: 0.45rem;
  font-size: 1.45rem;
  font-weight: 680;
  letter-spacing: -0.025em;
}

.approach-list p {
  max-width: 55ch;
  margin-bottom: 0;
  color: var(--muted);
}

.focus-heading {
  max-width: 48rem;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.focus-heading h2 {
  max-width: 13ch;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--line);
}

.focus-item {
  grid-column: span 5;
  min-height: 20rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 3rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  background: #e7ece8;
}

.focus-item-wide {
  grid-column: span 7;
}

.focus-item h3 {
  margin-bottom: 0.65rem;
  font-size: clamp(1.5rem, 2.2vw, 2rem);
  font-weight: 650;
  letter-spacing: -0.035em;
}

.focus-item p {
  max-width: 46ch;
  margin-bottom: 0;
  color: var(--muted);
}

.focus-item-accent {
  background: var(--green);
  color: var(--paper);
}

.focus-item-accent .focus-index,
.focus-item-accent p {
  color: #f2f5f2;
}

.focus-item-dark {
  background: var(--ink);
  color: var(--paper);
}

.focus-item-dark .focus-index {
  color: #8cb59f;
}

.focus-item-dark p {
  color: #c9d2cc;
}

.focus-item-paper {
  background: var(--paper);
}

.engagement {
  padding-block: var(--section-space);
  background: var(--ink);
  color: var(--paper);
}

.engagement-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(3rem, 9vw, 8rem);
}

.engagement .section-code {
  color: #8cb59f;
}

.engagement h2 {
  max-width: 12ch;
}

.engagement-options {
  border-top: 1px solid #65706a;
}

.engagement-options article {
  display: grid;
  grid-template-columns: minmax(9rem, 0.75fr) 1.25fr;
  gap: 2rem;
  padding-block: 1.7rem;
  border-bottom: 1px solid #65706a;
}

.engagement-options h3 {
  margin-bottom: 0;
  font-size: 1.05rem;
  font-weight: 700;
}

.engagement-options p {
  margin-bottom: 0;
  color: #c9d2cc;
}

.about {
  background: var(--paper);
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(8rem, 0.38fr) minmax(0, 1.62fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: start;
}

.about-marker {
  margin: 0;
  color: var(--green);
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 750;
  letter-spacing: -0.07em;
  line-height: 0.9;
}

.about h2 {
  max-width: 17ch;
}

.about p {
  max-width: 66ch;
}

.contact {
  padding-block: var(--section-space);
  border-top: 1px solid var(--line);
  background: var(--mist);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(3rem, 9vw, 9rem);
  align-items: start;
}

.contact-copy h2 {
  max-width: 10ch;
}

.contact-note {
  margin-top: 2rem;
  padding-left: 1rem;
  border-left: 3px solid var(--green);
  font-size: 0.92rem !important;
}

.enquiry-form {
  border-top: 4px solid var(--green);
  padding: clamp(1.5rem, 4vw, 3rem);
  background: var(--paper);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.field {
  margin-bottom: 1.35rem;
}

.field label {
  display: block;
  margin-bottom: 0.42rem;
  font-size: 0.95rem;
  font-weight: 720;
}

input[type="text"],
input[type="email"],
textarea {
  display: block;
  width: 100%;
  min-height: 3.25rem;
  border: 1px solid #78857e;
  border-radius: 0;
  padding: 0.75rem;
  background: var(--paper);
  color: var(--ink);
}

textarea {
  min-height: 10.5rem;
  resize: vertical;
}

input:hover,
textarea:hover {
  border-color: var(--ink);
}

input:focus,
textarea:focus {
  border-color: var(--green);
  outline: 3px solid var(--green);
  outline-offset: 2px;
}

input[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: var(--error);
  box-shadow: inset 4px 0 0 var(--error);
}

.guidance,
.error {
  margin: 0.4rem 0 0;
  font-size: 0.82rem;
  line-height: 1.45;
}

.guidance {
  color: var(--muted);
}

.error {
  min-height: 0;
  color: var(--error);
  font-weight: 700;
}

.error:empty {
  display: none;
}

.field-checkbox {
  display: grid;
  grid-template-columns: 1.3rem 1fr;
  gap: 0.65rem;
  align-items: start;
}

.field-checkbox input {
  width: 1.25rem;
  height: 1.25rem;
  margin: 0.18rem 0 0;
  accent-color: var(--green);
}

.field-checkbox label {
  margin: 0;
  font-weight: 550;
}

.field-checkbox .error {
  grid-column: 2;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 0.5rem;
}

.form-status {
  max-width: 30rem;
  margin: 0;
  color: var(--green-dark);
  font-size: 0.92rem;
  font-weight: 700;
}

.site-footer {
  padding-block: 2.5rem;
  border-top: 1px solid #46504b;
  background: var(--ink);
  color: #c9d2cc;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr 1.4fr 1.25fr 1.25fr;
  gap: 2rem;
  align-items: start;
}

.footer-grid p {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.5;
}

.footer-brand {
  color: var(--paper);
  font-weight: 750;
}

@media (max-width: 960px) {
  .header-inner {
    grid-template-columns: 1fr auto;
  }

  .primary-nav {
    display: none;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 0.8fr);
    gap: 2.5rem;
  }

  .hero-visual {
    min-height: 480px;
  }

  .engagement-options article {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

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

@media (max-width: 767px) {
  :root {
    --section-space: 4.5rem;
  }

  .header-inner {
    min-height: 64px;
    gap: 1rem;
  }

  .wordmark {
    font-size: 0.86rem;
  }

  .wordmark-mark {
    display: none;
  }

  .button-small {
    min-height: 2.5rem;
    padding-inline: 0.75rem;
    font-size: 0.75rem;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid,
  .approach-grid,
  .engagement-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 2.75rem;
    padding-block: 3.5rem;
  }

  h1 {
    max-width: 12ch;
    font-size: clamp(2.85rem, 13vw, 4rem);
  }

  .hero-visual {
    min-height: auto;
  }

  .section-intro h2,
  .engagement h2,
  .contact-copy h2 {
    max-width: 15ch;
  }

  .approach-grid,
  .engagement-grid,
  .contact-grid {
    gap: 3rem;
  }

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

  .focus-item,
  .focus-item-wide {
    grid-column: auto;
    min-height: 16rem;
  }

  .about-grid {
    gap: 2rem;
  }

  .about-marker {
    font-size: 3.5rem;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .form-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

@media (max-width: 420px) {
  .wordmark {
    max-width: 7.5rem;
    white-space: normal;
    line-height: 1.15;
  }

  .button-small {
    padding-inline: 0.65rem;
  }

  .approach-list li {
    grid-template-columns: 2.5rem 1fr;
    gap: 0.8rem;
  }

  .enquiry-form {
    padding: 1.25rem;
  }
}

@media (forced-colors: active) {
  .wordmark-mark,
  .hero-visual::before {
    forced-color-adjust: none;
  }

  .button {
    border: 2px solid ButtonText;
  }
}