@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/IBMPlexSans-Regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/IBMPlexSans-Medium.ttf") format("truetype");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/IBMPlexSans-SemiBold.ttf") format("truetype");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("/assets/fonts/JetBrainsMono-Medium.ttf") format("truetype");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

:root,
:root[data-theme="dark"] {
  --canvas: #0A0A0A;
  --surface: #111111;
  --surface-elevated: #1A1A1A;
  --text-primary: #E0E0E0;
  --text-secondary: #888888;
  --disabled: #555555;
  --divider: #2A2A2A;
  --control-outline: #606060;
  --brand: #4169E1;
  --brand-text: #5C7CEF;
  --on-brand: #FFFFFF;
  --brand-subtle: #0D1A3A;
  --danger: #E5484D;
  --success: #3A9142;
  --warning: #F2B84B;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --space-9: 48px;
  --space-10: 64px;
  --radius-1: 8px;
  --radius-2: 10px;
  --radius-3: 12px;
  --content-max: 1200px;
  --grid-gutter: 24px;
  --page-padding: 40px;
  --header-height: 72px;
  --font-sans: "IBM Plex Sans", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;
}

:root[data-theme="light"] {
  --canvas: #F5F5F5;
  --surface: #FFFFFF;
  --surface-elevated: #F0F0F0;
  --text-primary: #1A1A1A;
  --text-secondary: #666666;
  --disabled: #AAAAAA;
  --divider: #E0E0E0;
  --control-outline: #8A8A8A;
  --brand: #4169E1;
  --brand-text: #3357C6;
  --on-brand: #FFFFFF;
  --brand-subtle: #E8EEFF;
  --danger: #C62828;
  --success: #2E7D32;
  --warning: #7A5000;
}

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

html {
  background: var(--canvas);
  color-scheme: dark;
  scroll-behavior: smooth;
}

html[data-theme="light"] {
  color-scheme: light;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
input,
textarea,
select {
  color: inherit;
  font: inherit;
}

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

button {
  cursor: pointer;
}

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

a {
  color: var(--brand-text);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--text-primary);
}

:focus-visible {
  outline: 3px solid var(--brand-text);
  outline-offset: 3px;
}

::selection {
  background: var(--brand);
  color: var(--on-brand);
}

h1,
h2,
h3 {
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.025em;
  margin: 0;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.35rem, 5vw, 4.75rem);
  line-height: 1.02;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  line-height: 1.12;
}

h3 {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.25;
}

p,
ul,
ol {
  margin-block: 0;
}

.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 100;
  min-height: 48px;
  padding: var(--space-3) var(--space-4);
  background: var(--brand);
  color: var(--on-brand);
  font-weight: 600;
  transform: translateY(calc(-100% - var(--space-6)));
}

.skip-link:focus {
  color: var(--on-brand);
  transform: translateY(0);
}

.page-shell,
.wrap,
.site-header__inner,
.site-footer__inner {
  width: min(100%, calc(var(--content-max) + (2 * var(--page-padding))));
  margin-inline: auto;
  padding-inline: var(--page-padding);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--grid-gutter);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background: var(--canvas);
  border-bottom: 1px solid var(--divider);
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-5);
  height: 100%;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-2);
  min-height: 48px;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand:hover {
  color: var(--text-primary);
}

.brand__mark {
  width: 28px;
  height: 28px;
}

.brand__name {
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-left: auto;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-nav__links a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  color: var(--text-secondary);
  font-weight: 500;
  text-decoration: none;
}

.site-nav__links a:hover,
.site-nav__links a[aria-current="page"] {
  color: var(--text-primary);
}

.site-nav__links a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-color: var(--brand);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.45em;
}

.site-actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-2);
}

.theme-toggle,
.menu-toggle {
  min-height: 48px;
  padding-inline: var(--space-4);
  border: 1px solid var(--control-outline);
  border-radius: var(--radius-1);
  background: transparent;
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
}

.theme-toggle:hover,
.menu-toggle:hover {
  background: var(--surface-elevated);
  border-color: var(--text-secondary);
}

.menu-toggle {
  display: none;
}

:root:not([data-theme-bound="true"]) .theme-toggle {
  display: none;
}

.button,
.button--compact {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--brand);
  border-radius: var(--radius-1);
  background: var(--brand);
  color: var(--on-brand);
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
}

.button:hover,
.button--compact:hover {
  background: transparent;
  color: var(--brand-text);
}

.button--compact {
  padding-inline: var(--space-4);
  font-size: 0.875rem;
}

.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  color: var(--text-primary);
  font-weight: 500;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.eyebrow {
  color: var(--brand-text);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.125rem;
}

.muted {
  color: var(--text-secondary);
}

.mt-s {
  margin-top: var(--space-3);
}

.mt-m {
  margin-top: var(--space-6);
}

.mt-l {
  margin-top: var(--space-8);
}

.coming-soon {
  display: grid;
  align-items: center;
  width: min(100%, calc(var(--content-max) + (2 * var(--page-padding))));
  min-height: calc(100svh - var(--header-height));
  margin-inline: auto;
  padding: clamp(var(--space-10), 12vw, 128px) var(--page-padding);
}

.coming-soon__panel {
  width: min(100%, 60ch);
  margin-inline: 0;
  padding: clamp(var(--space-7), 6vw, var(--space-10));
  border-block: 1px solid var(--divider);
  background: var(--brand-subtle);
}

.coming-soon__panel h1 {
  max-width: 14ch;
  margin-top: var(--space-4);
}

.coming-soon__panel > p:not(.eyebrow) {
  max-width: 48ch;
  margin-top: var(--space-6);
  color: var(--text-secondary);
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
}

.coming-soon__panel .button-row {
  margin-top: var(--space-7);
}

.contact-page {
  padding-block: clamp(var(--space-10), 9vw, 112px);
}

.contact-intro {
  max-width: 68ch;
}

.contact-intro h1 {
  max-width: 13ch;
  margin-top: var(--space-4);
}

.contact-intro > p:not(.eyebrow) {
  max-width: 58ch;
  margin-top: var(--space-6);
  color: var(--text-secondary);
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: var(--grid-gutter);
  margin-top: var(--space-9);
}

.contact-card {
  padding: var(--space-7);
  border-top: 3px solid var(--brand);
  background: var(--surface);
}

.contact-card--followup {
  margin-top: var(--grid-gutter);
}

.contact-card__heading .mono {
  color: var(--brand-text);
  overflow-wrap: anywhere;
}

.contact-card__heading h2 {
  margin-top: var(--space-3);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
}

.contact-card__heading > p:last-child {
  margin-top: var(--space-4);
  color: var(--text-secondary);
}

.email-form {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-7);
}

.form-field {
  display: grid;
  gap: var(--space-2);
}

.form-field label {
  color: var(--text-primary);
  font-weight: 600;
}

.form-optional {
  margin-left: var(--space-2);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 400;
}

.form-field select,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--control-outline);
  border-radius: var(--radius-1);
  background: var(--canvas);
  color: var(--text-primary);
}

.form-field select {
  min-height: 48px;
  padding: var(--space-2) var(--space-3);
}

.form-field textarea {
  min-height: 168px;
  padding: var(--space-3);
  line-height: 1.5;
  resize: vertical;
}

.form-field select:hover,
.form-field textarea:hover {
  border-color: var(--text-secondary);
}

.form-field select[aria-invalid="true"] {
  border-color: var(--danger);
}

.form-help,
.form-error,
.email-form__disclosure,
.email-form__status,
.email-form__fallback {
  font-size: 0.875rem;
}

.form-help,
.email-form__disclosure,
.email-form__status,
.email-form__fallback {
  color: var(--text-secondary);
}

.form-error {
  color: var(--danger);
  font-weight: 500;
}

.email-form > .button {
  justify-self: start;
}

.email-form__disclosure {
  padding-left: var(--space-4);
  border-left: 2px solid var(--divider);
}

.email-form__status {
  min-height: 1.45rem;
}

.legal-page {
  padding-block: clamp(var(--space-10), 9vw, 112px);
}

.legal-page > section {
  padding-inline: var(--page-padding);
}

.legal-page .wrap {
  padding-inline: 0;
}

.legal {
  max-width: 72ch;
}

.legal h1 {
  max-width: 18ch;
  margin-top: var(--space-7);
  font-size: clamp(2.25rem, 5vw, 4rem);
}

.legal h2 {
  margin-top: var(--space-9);
  font-size: clamp(1.45rem, 3vw, 2rem);
}

.legal h3 {
  margin-top: var(--space-7);
}

.legal p,
.legal ul,
.legal ol {
  margin-top: var(--space-4);
}

.legal ul,
.legal ol {
  padding-left: var(--space-6);
}

.legal li + li {
  margin-top: var(--space-2);
}

.legal a {
  overflow-wrap: anywhere;
}

.legal code,
.legal pre {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

.legal pre {
  max-width: 100%;
  padding: var(--space-4);
  overflow-x: auto;
  border: 1px solid var(--divider);
  background: var(--surface);
}

.updated,
.toc {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.callout {
  margin-bottom: var(--space-7);
  padding: var(--space-5) var(--space-6);
  border-left: 4px solid var(--warning);
  background: var(--surface);
}

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

.site-footer {
  border-top: 1px solid var(--divider);
  background: var(--canvas);
}

.site-footer__inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-7);
  padding-block: var(--space-8) var(--space-9);
}

.site-footer__brand {
  max-width: 30ch;
}

.site-footer__brand strong {
  display: block;
  color: var(--text-primary);
  font-weight: 600;
}

.site-footer__brand span {
  display: block;
  margin-top: var(--space-2);
  color: var(--text-secondary);
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-2) var(--space-5);
}

.site-footer__links a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  color: var(--text-secondary);
  font-weight: 500;
}

.site-footer__links a:hover {
  color: var(--text-primary);
}

@media (max-width: 1023px) {
  :root,
  :root[data-theme="dark"] {
    --page-padding: 20px;
    --header-height: 64px;
  }

  .site-header__inner {
    gap: var(--space-2);
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    align-items: stretch;
    margin-left: 0;
    padding: var(--space-4) var(--page-padding) var(--space-6);
    border-bottom: 1px solid var(--divider);
    background: var(--canvas);
  }

  .site-header[data-menu-open="true"] .site-nav {
    display: flex;
    flex-direction: column;
  }

  .site-nav__links {
    display: grid;
    gap: 0;
  }

  .site-nav__links a {
    border-bottom: 1px solid var(--divider);
  }

  .site-nav .button--compact {
    margin-top: var(--space-3);
  }

  .site-actions {
    margin-left: auto;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
  }

  :root:not([data-site-bound="true"]) .site-header {
    position: static;
    height: auto;
  }

  :root:not([data-site-bound="true"]) .site-header__inner {
    flex-wrap: wrap;
    height: auto;
    min-height: var(--header-height);
    padding-block: var(--space-2);
  }

  :root:not([data-site-bound="true"]) .site-nav {
    position: static;
    display: flex;
    flex: 1 0 100%;
    flex-direction: column;
    padding: 0 0 var(--space-4);
    border-bottom: 0;
  }

  :root:not([data-site-bound="true"]) .theme-toggle,
  :root:not([data-site-bound="true"]) .menu-toggle {
    display: none;
  }

  .coming-soon {
    padding-inline: var(--page-padding);
  }

  .coming-soon__panel {
    margin-inline: 0;
    padding-inline: var(--space-5);
  }

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

  .site-footer__inner {
    display: grid;
  }

  .site-footer__links {
    justify-content: flex-start;
  }
}

@media (max-width: 420px) {
  .brand__mark {
    width: 24px;
    height: 24px;
  }

  .theme-toggle,
  .menu-toggle {
    padding-inline: var(--space-3);
  }

  .button-row {
    align-items: stretch;
    flex-direction: column;
  }

  .button-row > * {
    width: 100%;
  }

  .contact-card {
    padding-inline: var(--space-5);
  }

  .email-form > .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}