/* Spark Capital Management. Spark blue and warm off-white. */

@font-face {
  font-family: "DM Sans";
  src: url("/assets/fonts/dm-sans.a979dab878.woff2") format("woff2");
  font-weight: 300 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "EB Garamond";
  src: url("/assets/fonts/eb-garamond.9adac11aae.woff2") format("woff2");
  font-weight: 400 500;
  font-style: normal;
  font-display: swap;
}

/* Metric-matched fallbacks keep the layout still while the web fonts load. */
@font-face {
  font-family: "DM Sans Fallback";
  src: local("Arial"), local("Helvetica Neue"), local("Helvetica");
  size-adjust: 98%;
  ascent-override: 101%;
  descent-override: 32%;
}

@font-face {
  font-family: "EB Garamond Fallback";
  src: local("Georgia"), local("Times New Roman");
  size-adjust: 88%;
  ascent-override: 116%;
  descent-override: 34%;
}

:root {
  /* Spark blue, from the wordmark's original background. */
  --ink: #153d56;
  --navy: #153d56;
  --paper: #f6f2ea;
  --paper-rule: #d9cfbd;

  --on-dark: #f3eee4;
  --on-dark-muted: #b8b2a6;
  --on-light: #0c0f14;
  --on-light-muted: #4a4f5c;

  --sans: "DM Sans", "DM Sans Fallback", system-ui, sans-serif;
  --serif: "EB Garamond", "EB Garamond Fallback", Georgia, serif;

  /* Type scale: minor third, fluid between 360px and 1440px. */
  --step--1: 0.8125rem;
  --step-0: clamp(1.125rem, 1.08rem + 0.2vw, 1.25rem);
  --step-1: clamp(1.375rem, 1.29rem + 0.4vw, 1.625rem);
  --step-2: clamp(1.75rem, 1.6rem + 0.65vw, 2.25rem);
  --step-3: clamp(2.25rem, 1.8rem + 2.2vw, 4rem);

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: clamp(4rem, 3rem + 4vw, 7.5rem);

  --measure: 68ch;
  --wrap: 72rem;
  --gutter: clamp(1.25rem, 0.8rem + 2vw, 2.5rem);
  --header-h: 4.75rem;
}

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

html {
  background: var(--ink);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: var(--header-h);
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--on-light);
  font-family: var(--serif);
  font-size: var(--step-0);
  line-height: 1.6;
  font-kerning: normal;
  font-variant-numeric: oldstyle-nums proportional-nums;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

p,
ul,
ol,
dl,
dd {
  margin: 0;
}

p {
  text-wrap: pretty;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

:focus-visible {
  outline: 2px solid var(--focus, var(--navy));
  outline-offset: 3px;
  border-radius: 1px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

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

.dark {
  --focus: #ffffff;
  background: var(--ink);
  color: var(--on-dark);
}

.dark--navy {
  background: var(--navy);
}

/* Skip link */

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

/* Header */

.site-header {
  --focus: #ffffff;
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--ink);
  color: var(--on-dark);
  border-bottom: 1px solid rgb(243 238 228 / 0.16);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: var(--space-3);
}

.brand {
  display: block;
  flex: none;
  padding-block: 0.5rem;
}

.brand img {
  width: 116px;
  height: auto;
}

.site-nav {
  font-family: var(--sans);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
}

.site-nav ul {
  display: flex;
  gap: clamp(1.25rem, 2.2vw, 2.25rem);
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: inline-block;
  padding-block: 0.5rem;
  color: var(--on-dark);
  text-decoration: none;
}

.site-nav ul a:hover,
.site-nav ul a[aria-current="true"] {
  color: #ffffff;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.45em;
}

.nav-portal {
  margin-left: clamp(1.5rem, 2.5vw, 2.75rem);
  padding: 0.5rem 1rem !important;
  border: 1px solid rgb(243 238 228 / 0.5);
  color: var(--on-dark);
  transition: border-color 160ms ease, background-color 160ms ease;
}

.nav-portal:hover {
  border-color: #ffffff;
  background: rgb(243 238 228 / 0.08);
}

.nav-portal svg {
  display: inline-block;
  width: 0.625rem;
  height: 0.625rem;
  margin-left: 0.4rem;
  vertical-align: 0.05em;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.75rem;
  min-height: 44px;
  padding: 0.5rem 0;
  background: none;
  border: 0;
  color: var(--on-dark);
  font-family: var(--sans);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}

.nav-toggle-bars {
  position: relative;
  width: 22px;
  height: 9px;
  border-top: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars {
  border-color: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before,
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 0;
  width: 22px;
  border-top: 1px solid currentColor;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  transform: rotate(-45deg);
}

.site-nav-inner {
  display: flex;
  align-items: center;
}

@media (max-width: 899.98px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--ink);
    border-bottom: 1px solid rgb(243 238 228 / 0.16);
  }

  .site-header[data-open] .site-nav {
    display: block;
  }

  .site-nav-inner {
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-2) var(--gutter) var(--space-4);
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .site-nav ul a {
    display: block;
    padding-block: 0.9rem;
    border-bottom: 1px solid rgb(243 238 228 / 0.1);
    font-size: 1rem;
  }

  .nav-portal {
    align-self: flex-start;
    margin: var(--space-3) 0 0;
  }
}

/* Hero */

.hero {
  padding-block: clamp(5rem, 3rem + 10vw, 11rem) clamp(5rem, 3rem + 8vw, 9rem);
}

.hero h1 {
  max-width: 19ch;
  font-size: var(--step-3);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.hero-lede {
  max-width: 44ch;
  margin-top: var(--space-4);
  color: var(--on-dark-muted);
  font-size: var(--step-1);
  line-height: 1.5;
}

@media (prefers-reduced-motion: no-preference) {
  .hero h1,
  .hero-lede {
    animation: rise 900ms cubic-bezier(0.2, 0.6, 0.2, 1) both;
  }

  .hero h1 {
    animation-delay: 80ms;
  }

  .hero-lede {
    animation-delay: 200ms;
  }
}

@keyframes rise {
  from {
    opacity: 0.01;
    transform: translateY(10px);
  }
}

/* Sections */

.section {
  padding-block: var(--space-5);
  scroll-margin-top: var(--header-h);
}

.section.dark + .section.dark {
  border-top: 1px solid rgb(243 238 228 / 0.16);
}

.section + .section:not(.dark) {
  border-top: 1px solid var(--paper-rule);
}

.section-grid {
  display: grid;
  gap: var(--space-3) var(--space-4);
}

@media (min-width: 900px) {
  .section-grid {
    grid-template-columns: minmax(11rem, 1fr) minmax(0, 3fr);
  }
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.section-head h2 {
  font-family: var(--sans);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.16em;
  line-height: 1.4;
  text-transform: uppercase;
}

.section-num {
  font-family: var(--sans);
  font-size: var(--step--1);
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--on-light-muted);
  font-variant-numeric: lining-nums tabular-nums;
}

.dark .section-num {
  color: var(--on-dark-muted);
}

.section-body {
  max-width: var(--measure);
}

.statement {
  font-family: var(--sans);
  font-size: var(--step-2);
  font-weight: 300;
  line-height: 1.25;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.prose > * + * {
  margin-top: var(--space-3);
}

.prose > .statement + * {
  margin-top: var(--space-4);
}

/* Approach */

.principles {
  border-top: 1px solid var(--paper-rule);
}

.principle {
  display: grid;
  gap: 0.35rem var(--space-4);
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--paper-rule);
}

@media (min-width: 640px) {
  .principle {
    grid-template-columns: 12rem minmax(0, 1fr);
  }
}

.principle dt {
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.6;
}

/* Criteria */

.criteria {
  display: grid;
  gap: var(--space-4) var(--space-4);
  padding: 0;
  list-style: none;
}

@media (min-width: 640px) {
  .criteria {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .criteria {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.criterion {
  padding-top: var(--space-3);
  border-top: 1px solid rgb(243 238 228 / 0.25);
}

.criterion-num {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--on-dark-muted);
  font-family: var(--sans);
  font-size: var(--step--1);
  letter-spacing: 0.12em;
  font-variant-numeric: lining-nums tabular-nums;
}

.criterion h3 {
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: -0.005em;
}

.criterion p {
  margin-top: 0.75rem;
  color: var(--on-dark-muted);
}

/* Leadership */

.person-name {
  font-size: var(--step-2);
  font-weight: 300;
}

.person-title {
  margin-top: 0.6rem;
  color: var(--on-light-muted);
  font-family: var(--sans);
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
}

.person-bio {
  margin-top: var(--space-3);
}

/* Contact */

.contact-line {
  font-family: var(--sans);
  font-size: min(var(--step-2), 5vw);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

.contact-line a {
  text-decoration-color: #ffffff;
  overflow-wrap: break-word;
}

.contact-line a:hover {
  color: #ffffff;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: 0;
  list-style: none;
  font-family: var(--sans);
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
}

.contact-links a {
  display: inline-block;
  padding-block: 0.5rem;
  color: var(--on-light);
  text-decoration-color: var(--on-light-muted);
}

.contact-links a:hover {
  color: var(--navy);
}

.dark .contact-links a {
  color: var(--on-dark);
  text-decoration-color: rgb(243 238 228 / 0.6);
}

.dark .contact-links a:hover {
  color: #ffffff;
}

/* Research request */

.request {
  margin-top: var(--space-3);
  max-width: 34rem;
}

.request-form {
  display: grid;
  gap: var(--space-3);
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field label {
  font-family: var(--sans);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--on-light-muted);
}

.field-optional {
  font-weight: 400;
}

.field input,
.field textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--paper-rule);
  border-radius: 2px;
  background: #fffdf8;
  color: var(--on-light);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.4;
}

.field textarea {
  resize: vertical;
  min-height: 5.5rem;
}

.field input:focus-visible,
.field textarea:focus-visible {
  outline-offset: 0;
  border-color: var(--navy);
}

.field [aria-invalid="true"] {
  border-color: #9b2c2c;
}

.request-note {
  font-family: var(--sans);
  font-size: var(--step--1);
  color: var(--on-light-muted);
}

.request-submit {
  justify-self: start;
  min-height: 2.75rem;
  padding: 0.7rem 1.6rem;
  border: 0;
  border-radius: 2px;
  background: var(--navy);
  color: var(--on-dark);
  font-family: var(--sans);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  cursor: pointer;
}

.request-submit:hover {
  background: #0f2e41;
}

.request-submit[disabled] {
  opacity: 0.6;
  cursor: progress;
}

.request-status {
  font-family: var(--sans);
  font-size: 0.9375rem;
}

.request-status:empty {
  display: none;
}

.request-status[data-state="error"] {
  color: #9b2c2c;
}

.request-done {
  font-family: var(--sans);
  font-size: var(--step-1);
  font-weight: 300;
  line-height: 1.4;
}

/* Interior pages */

.page-hero {
  padding-block: clamp(4rem, 3rem + 5vw, 7rem) clamp(3rem, 2rem + 3vw, 5rem);
}

.page-hero h1 {
  font-size: var(--step-3);
  font-weight: 300;
  letter-spacing: -0.025em;
}

.page-hero p {
  max-width: 52ch;
  margin-top: var(--space-3);
  color: var(--on-dark-muted);
  font-size: var(--step-1);
  line-height: 1.5;
}

.doc {
  max-width: var(--measure);
}

.doc h2 {
  margin-top: var(--space-4);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.005em;
}

.doc h2:first-child {
  margin-top: 0;
}

.doc h2 + p {
  margin-top: 0.75rem;
}

.doc p + p {
  margin-top: var(--space-2);
}

.doc a {
  color: var(--navy);
  text-decoration-color: var(--navy);
}

.doc-updated {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--paper-rule);
  color: var(--on-light-muted);
  font-family: var(--sans);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
}

.text-link {
  display: inline-block;
  margin-top: var(--space-4);
  padding-block: 0.5rem;
  font-family: var(--sans);
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  text-decoration-color: #ffffff;
}

.text-link:hover {
  color: #ffffff;
}

/* Footer */

.site-footer {
  padding-block: var(--space-5) var(--space-4);
  border-top: 1px solid rgb(243 238 228 / 0.16);
  font-size: 0.9375rem;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid rgb(243 238 228 / 0.12);
}

.footer-top .brand img {
  width: 112px;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem var(--space-3);
  padding: 0;
  list-style: none;
  font-family: var(--sans);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
}

.footer-nav a {
  display: inline-block;
  padding-block: 0.5rem;
  color: var(--on-dark);
  text-decoration: none;
}

.footer-nav a:hover {
  color: #ffffff;
}

.disclosure {
  max-width: 88ch;
  margin-top: var(--space-4);
  color: var(--on-dark-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.copyright {
  margin-top: var(--space-3);
  color: var(--on-dark-muted);
  font-family: var(--sans);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

/* Scroll reveal. Only applied by JS to content below the fold, never under reduced motion. */

@media (prefers-reduced-motion: no-preference) {
  .reveal-pending {
    opacity: 0;
    transform: translateY(14px);
  }

  .reveal-in {
    opacity: 1;
    transform: none;
    transition: opacity 800ms ease, transform 800ms cubic-bezier(0.2, 0.6, 0.2, 1);
  }
}

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

  .dark {
    background: none;
    color: #000;
  }
}