@layer reset, tokens, base, components, utilities;

@font-face {
   font-family: 'Outfit';
   src: url('./assets/fonts/outfit-700.woff2') format('woff2');
   font-weight: 700;
   font-style: normal;
   font-display: swap;
}

@font-face {
   font-family: 'Outfit';
   src: url('./assets/fonts/outfit-800.woff2') format('woff2');
   font-weight: 800;
   font-style: normal;
   font-display: swap;
}

@font-face {
   font-family: 'Inter';
   src: url('./assets/fonts/inter-400.woff2') format('woff2');
   font-weight: 400;
   font-style: normal;
   font-display: swap;
}

@font-face {
   font-family: 'Inter';
   src: url('./assets/fonts/inter-600.woff2') format('woff2');
   font-weight: 600;
   font-style: normal;
   font-display: swap;
}

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

   html {
      -moz-text-size-adjust: none;
      -webkit-text-size-adjust: none;
      text-size-adjust: none;
   }

   body,
   h1,
   h2,
   h3,
   h4,
   p,
   figure,
   blockquote,
   dl,
   dd {
      margin: 0;
   }

   [role='list'] {
      list-style: none;
      margin: 0;
      padding: 0;
   }

   body {
      min-block-size: 100vh;
      line-height: 1.6;
   }

   h1,
   h2,
   h3,
   h4 {
      text-wrap: balance;
   }

   p,
   li {
      text-wrap: pretty;
   }

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

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

@layer tokens {
   :root {

      /* brand constants */
      --color-brand: #297aff;
      --color-near-black: #15141a;
      --color-white: #ffffff;

      --color-brand-hover: #5e9bff;
      --color-brand-tint: #95bdff;

      --color-brand-soft: #1a2e52;
      --color-brand-border: #1e468d;

      --color-text-primary: var(--color-white);
      --color-text-secondary: #c5c3c6;
      --color-text-muted: #8b8b8d;
      --color-hairline: #504e52;

      --color-surface-page: var(--color-near-black);
      --color-surface-alt: color-mix(
         in srgb,
         var(--color-near-black) 96%,
         var(--color-white)
      );
      --color-surface-card: color-mix(
         in srgb,
         var(--color-near-black) 92%,
         var(--color-white)
      );
      --color-surface-inset: var(--color-surface-page);
      --color-surface-header: color-mix(
         in srgb,
         var(--color-near-black) 88%,
         transparent
      );

      /* borders */
      --color-border-subtle: color-mix(
         in srgb,
         var(--color-hairline) 45%,
         transparent
      );
      --color-border-card: color-mix(
         in srgb,
         var(--color-hairline) 60%,
         transparent
      );
      --color-border-input: color-mix(
         in srgb,
         var(--color-hairline) 80%,
         transparent
      );
      --color-border-accent: var(--color-brand);
      --color-border-rule: color-mix(
         in srgb,
         var(--color-brand) 55%,
         transparent
      );

      /* roles */
      --color-link: var(--color-brand-hover);
      --color-text-on-brand: var(--color-near-black);
      --color-focus: var(--color-brand-hover);
      --color-placeholder: color-mix(
         in srgb,
         var(--color-near-black) 86%,
         var(--color-white)
      );

      --color-chart-competitor: #e0a23c;
      --color-chart-devhatch: var(--color-brand);
      --color-chart-grid: color-mix(
         in srgb,
         var(--color-hairline) 35%,
         transparent
      );
      --color-chart-axis: var(--color-text-muted);

      /* ===================================================================
         TYPOGRAPHY
         =================================================================== */

      /* font family */
      --ff-heading: 'Outfit', ui-sans-serif, system-ui, -apple-system,
         'Segoe UI', sans-serif;
      --ff-body: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI',
         sans-serif;

      /* font weight */
      --fw-heading: 700;
      --fw-heading-strong: 800;
      --fw-body: 400;
      --fw-body-strong: 600;

      /* font size */
      --fs-micro: 0.75rem;
      --fs-small: 0.875rem;
      --fs-body: 1rem;
      --fs-lead: clamp(1.0625rem, 1.01rem + 0.28vw, 1.25rem);
      --fs-h3: clamp(1.125rem, 1.07rem + 0.28vw, 1.3125rem);
      --fs-h2: clamp(1.75rem, 1.29rem + 2.3vw, 3rem);
      --fs-h1: clamp(2.25rem, 1.52rem + 3.65vw, 4rem);
      --fs-price: clamp(2.25rem, 1.73rem + 2.6vw, 3.5rem);

      /* line height */
      --lh-tight: 1.05;
      --lh-heading: 1.15;
      --lh-body: 1.6;

      /* letter spacing */
      --ls-tight: -0.02em;
      --ls-wide: 0.08em;

      /* ===================================================================
         SPACE
         =================================================================== */
      --space-3xs: 0.25rem;
      --space-2xs: 0.5rem;
      --space-xs: 0.75rem;
      --space-sm: 1rem;
      --space-md: 1.5rem;
      --space-lg: 2rem;
      --space-xl: 3rem;
      --space-2xl: 4rem;
      --space-section: clamp(3.5rem, 1.5rem + 8vw, 7rem);
      --space-gutter: clamp(1.25rem, 0.9rem + 1.6vw, 2rem);
      --space-card: clamp(1.25rem, 1rem + 1vw, 1.75rem);
      --space-panel: clamp(1.5rem, 1rem + 2vw, 2.5rem);

      /* ===================================================================
         RADII, SIZES, MOTION
         =================================================================== */
      --radius-sm: 0.25rem;
      --radius-input: 0.5rem;
      --radius-card: 0.625rem;
      --radius-panel: 0.875rem;
      --radius-pill: 999px;

      --width-shell: 72rem;
      --width-measure: 62ch;
      --width-slot: 35rem;
      --border-width-accent: 3px;

      --height-header: 4rem;

      --transition-base: 150ms ease;
   }

   @media (min-width: 48rem) {
      :root {
         --height-header: 4.5rem;
      }
   }
}

@layer base {
   body {
      background-color: var(--color-surface-page);
      color: var(--color-text-secondary);
      font-family: var(--ff-body);
      font-weight: var(--fw-body);
      font-size: var(--fs-body);
      line-height: var(--lh-body);
      -webkit-font-smoothing: antialiased;
   }

   h1,
   h2,
   h3,
   h4 {
      font-family: var(--ff-heading);
      color: var(--color-text-primary);
      line-height: var(--lh-heading);
      letter-spacing: var(--ls-tight);
   }

   h1 {
      font-size: var(--fs-h1);
      font-weight: var(--fw-heading-strong);
      line-height: var(--lh-tight);
   }

   h2 {
      font-size: var(--fs-h2);
      font-weight: var(--fw-heading-strong);
   }

   h3 {
      font-size: var(--fs-h3);
      font-weight: var(--fw-heading);
   }

   strong {
      color: var(--color-text-primary);
      font-weight: var(--fw-body-strong);
   }

   small {
      font-size: var(--fs-small);
      color: var(--color-text-muted);
   }

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

   svg {
      display: block;
      max-inline-size: 100%;
   }

   :target,
   section[id] {
      scroll-margin-block-start: calc(var(--height-header) + var(--space-md));
   }

   a:focus-visible,
   button:focus-visible,
   summary:focus-visible,
   input:focus-visible,
   textarea:focus-visible,
   [tabindex]:focus-visible {
      outline: 2px solid var(--color-focus);
      outline-offset: 2px;
   }

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

      .btn,
      .faq__item summary,
      .icon--chevron,
      .contact-form input,
      .contact-form textarea {
         transition:
            background-color var(--transition-base),
            border-color var(--transition-base),
            color var(--transition-base),
            transform var(--transition-base);
      }
   }

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

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

@layer components {
   /* ---------------------------------------------------------------- shell */

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

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

   .section--alt {
      background-color: var(--color-surface-alt);
   }

   .section .shell > * + * {
      margin-block-start: var(--space-lg);
   }

   .section .shell > h2 + .lead,
   .section .shell > h2 + .prose {
      margin-block-start: var(--space-md);
   }

   .lead {
      font-size: var(--fs-lead);
      color: var(--color-text-secondary);
      max-inline-size: var(--width-measure);
   }

   .prose {
      max-inline-size: var(--width-measure);
   }

   .prose > * + * {
      margin-block-start: var(--space-sm);
   }

   .prose h2 {
      font-size: var(--fs-h3);
      font-weight: var(--fw-heading);
   }

   .prose > h2 {
      margin-block-start: var(--space-xl);
   }

   .prose ul {
      display: grid;
      gap: var(--space-2xs);
      margin-block-end: 0;
      padding-inline-start: var(--space-md);
   }

   .prose li::marker {
      color: var(--color-brand);
   }

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

   /* --------------------------------------------------------------- header */

   .site-header {
      position: sticky;
      inset-block-start: 0;
      z-index: 10;
      background-color: var(--color-surface-header);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-block-end: 1px solid var(--color-border-subtle);
   }

   .site-nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-sm);
      block-size: var(--height-header);
      inline-size: 100%;
      max-inline-size: var(--width-shell);
      margin-inline: auto;
      padding-inline: var(--space-gutter);
   }

   .site-nav__logo {
      display: block;
      min-inline-size: 0;
      flex: 0 1 auto;
      line-height: 0;
   }

   .site-nav__logo img {
      block-size: 1.375rem;
      inline-size: auto;
   }

   .site-header .btn {
      flex: none;
      font-size: var(--fs-micro);
      padding: 0.5rem 0.75rem;
   }

   @media (min-width: 48rem) {
      .site-nav__logo img {
         block-size: 1.75rem;
      }

      .site-header .btn {
         font-size: var(--fs-small);
         padding: 0.625rem 1.25rem;
      }
   }

   /* -------------------------------------------------------------- buttons */

   .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: var(--space-2xs);
      padding: 0.8125rem 1.5rem;
      border: 1px solid transparent;
      border-radius: var(--radius-pill);
      font-family: var(--ff-body);
      font-weight: var(--fw-body-strong);
      font-size: var(--fs-body);
      line-height: 1.2;
      text-align: center;
      text-decoration: none;
      cursor: pointer;
   }

   .btn--primary {
      background-color: var(--color-brand);
      color: var(--color-text-on-brand);
   }

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

   .btn--ghost {
      background-color: transparent;
      border-color: var(--color-brand);
      color: var(--color-link);
   }

   .btn--ghost:hover {
      background-color: var(--color-brand-soft);
   }

   .btn--quiet {
      background-color: transparent;
      color: var(--color-link);
   }

   .btn--quiet:hover {
      color: var(--color-brand-tint);
   }

   .btn--block {
      inline-size: 100%;
   }

   .btn:disabled {
      cursor: progress;
      opacity: 0.6;
   }

   /* ----------------------------------------------------------------- hero */

   .hero {
      padding-block-start: var(--space-xl);
   }

   .hero__grid {
      display: grid;
      gap: var(--space-xl);
      align-items: center;
   }

   .hero__grid > * + * {
      margin-block-start: 0;
   }

   .hero__copy > * + * {
      margin-block-start: var(--space-md);
   }

   .hero__copy .lead {
      max-inline-size: 36ch;
   }

   .hero__actions {
      display: grid;
      gap: var(--space-sm);
      margin-block-start: var(--space-lg);
   }

   .hero__actions .btn--quiet {
      border-color: var(--color-brand-border);
   }

   .hero__media {
      max-inline-size: var(--width-slot);
   }

   @media (min-width: 48rem) {
      .hero__actions {
         display: flex;
         flex-wrap: wrap;
         align-items: center;
         gap: var(--space-md);
      }

      .hero__actions .btn--quiet {
         border-color: transparent;
         padding-inline: var(--space-2xs);
      }
   }

   @media (48rem <= width < 64rem) {
      .hero__copy {
         text-align: center;
      }

      .hero__copy .lead {
         margin-inline: auto;
      }

      .hero__actions {
         justify-content: center;
      }

      .hero__media {
         inline-size: 100%;
         margin-inline: auto;
      }
   }

   @media (min-width: 64rem) {
      .hero__grid {
         grid-template-columns: minmax(25rem, 1fr) minmax(0, var(--width-slot));
         gap: var(--space-2xl);
      }
   }

   /* ------------------------------------------------------ credibility bar */

   .credibility-bar {
      background-color: var(--color-surface-alt);
      border-block: 1px solid var(--color-border-rule);
   }

   .credibility-bar__list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
   }

   .credibility-bar__list > li {
      display: flex;
      align-items: flex-start;
      gap: var(--space-2xs);
      padding: var(--space-md) var(--space-sm);
      font-size: var(--fs-small);
      color: var(--color-text-muted);
      min-inline-size: 0;
   }

   .credibility-bar__list > li + li {
      border-block-start: 1px solid var(--color-border-subtle);
   }

   @media (min-width: 48rem) {
      .credibility-bar__list {
         grid-auto-flow: column;
         grid-auto-columns: minmax(0, 1fr);
      }

      .credibility-bar__list > li + li {
         border-block-start: 0;
         border-inline-start: 1px solid var(--color-border-subtle);
      }
   }

   /* ---------------------------------------------------------------- cards */

   .card {
      background-color: var(--color-surface-card);
      border: 1px solid var(--color-border-card);
      border-radius: var(--radius-card);
      padding: var(--space-card);
      min-inline-size: 0;
   }

   .card > * + * {
      margin-block-start: var(--space-xs);
   }

   .card--accent {
      border-inline-start: var(--border-width-accent) solid
         var(--color-border-accent);
   }

   .card--tile > .icon {
      margin-block-end: var(--space-sm);
   }

   .card-grid {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: var(--space-md);
   }

   @media (min-width: 48rem) {
      .card-grid--problem,
      .card-grid--quad,
      .card-grid--features {
         grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .card-grid--problem > :first-child,
      .card-grid--features > :last-child {
         grid-column: 1 / -1;
      }
   }

   @media (min-width: 64rem) {
      .card-grid--problem,
      .card-grid--features {
         grid-template-columns: repeat(3, minmax(0, 1fr));
      }

      .card-grid--quad {
         grid-template-columns: repeat(4, minmax(0, 1fr));
      }

      .card-grid--problem > :first-child,
      .card-grid--features > :last-child {
         grid-column: auto;
      }
   }

   /* ------------------------------------------------------- feature groups */

   .feature-group > h3 + .feature-list {
      margin-block-start: var(--space-sm);
   }

   .feature-list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: var(--space-2xs);
      font-size: var(--fs-small);
   }

   .feature-list > li {
      display: flex;
      gap: var(--space-2xs);
      color: var(--color-text-secondary);
   }

   .feature-list > li::before {
      content: '';
      flex: none;
      inline-size: 0.5rem;
      block-size: 2px;
      margin-block-start: 0.62em;
      border-radius: 1px;
      background-color: var(--color-brand);
   }

   /* ---------------------------------------------------------------- icons */

   .icon {
      display: inline-block;
      flex: none;
      inline-size: var(--icon-size, 1.125rem);
      block-size: var(--icon-size, 1.125rem);
      color: var(--color-brand-hover);
   }

   .icon > svg {
      display: block;
      inline-size: 100%;
      block-size: 100%;
   }

   .icon--tile {
      --icon-size: 2.75rem;
      --icon-glyph: 1.5rem;
      display: grid;
      place-items: center;
      background-color: var(--color-brand-soft);
      border: 1px solid var(--color-brand-border);
      border-radius: var(--radius-card);
   }

   .icon--tile > svg {
      inline-size: var(--icon-glyph);
      block-size: var(--icon-glyph);
   }

   .icon--chevron {
      --icon-size: 1rem;
      color: var(--color-text-secondary);
   }

   .credibility-bar__list .icon {
      margin-block-start: 0.15em;
   }

   /* --------------------------------------------------- image placeholders */

   .media {
      position: relative;
      overflow: hidden;
      border: 1px solid var(--color-border-card);
      border-radius: var(--radius-panel);
      background-color: var(--color-placeholder);
   }

   .media--wide {
      aspect-ratio: 16 / 10;
   }

   .media--phone {
      aspect-ratio: 39 / 74;
      inline-size: 100%;
      max-inline-size: 15rem;
      margin-inline: auto;
   }

   .media > img {
      position: absolute;
      inset: 0;
      inline-size: 100%;
      block-size: 100%;
      object-fit: cover;
   }

   .media > img:not([src]) {
      opacity: 0;
   }

   /* ---------------------------------------------------------------- chart */

   .chart {
      container-type: inline-size;
      background-color: var(--color-surface-card);
      border: 1px solid var(--color-border-card);
      border-radius: var(--radius-panel);
      padding: var(--space-card);
   }

   .chart__svg {
      --chart-text-unit: calc(
         var(--chart-text-k) * 1px - var(--chart-text-slope) * 1cqi
      );
      display: block;
      inline-size: 100%;
      block-size: auto;
   }

   .chart__svg--narrow {
      --chart-text-k: 1.307;
      --chart-text-slope: 0.15;
   }

   .chart__svg--wide {
      --chart-text-k: 1.668;
      --chart-text-slope: 0.0862;
      display: none;
   }

   .chart__svg--narrow .chart__key text {
      text-anchor: end;
   }

   @container (min-width: 37.5rem) {
      .chart__svg--wide {
         display: block;
      }

      .chart__svg--narrow {
         display: none;
      }
   }

   .chart figcaption {
      margin-block-start: var(--space-sm);
      font-size: var(--fs-small);
      color: var(--color-text-muted);
   }

   .chart__grid line {
      stroke: var(--color-chart-grid);
      stroke-width: 1;
   }

   .chart__axis text {
      font-family: var(--ff-body);
      font-size: calc(11 * var(--chart-text-unit));
      fill: var(--color-chart-axis);
   }

   .chart__axis--y text {
      text-anchor: end;
   }

   .chart__axis--x text {
      text-anchor: middle;
   }

   .chart__legend text {
      font-family: var(--ff-body);
      font-size: calc(12 * var(--chart-text-unit));
      font-weight: var(--fw-body-strong);
      fill: var(--color-text-secondary);
      dominant-baseline: middle;
   }

   .chart__legend-swatch {
      stroke-width: 3;
      stroke-linecap: round;
   }

   .chart__legend-swatch--competitor {
      stroke: var(--color-chart-competitor);
   }

   .chart__legend-swatch--devhatch {
      stroke: var(--color-chart-devhatch);
   }

   .chart__line {
      fill: none;
      stroke-width: 2.5;
      stroke-linecap: round;
   }

   .chart__line--competitor {
      stroke: var(--color-chart-competitor);
   }

   .chart__line--devhatch {
      stroke: var(--color-chart-devhatch);
   }

   .chart__key text {
      font-family: var(--ff-body);
      font-size: calc(12 * var(--chart-text-unit));
      font-weight: var(--fw-body-strong);
   }

   .chart__key--competitor text {
      fill: var(--color-chart-competitor);
   }

   .chart__key--devhatch text {
      fill: var(--color-chart-devhatch);
   }

   .chart__key--competitor text.chart__key-value,
   .chart__key--devhatch text.chart__key-value {
      font-weight: var(--fw-body);
      fill: var(--color-text-muted);
   }

   .chart__crossover text {
      font-family: var(--ff-body);
      font-size: calc(11 * var(--chart-text-unit));
      font-weight: var(--fw-body-strong);
      letter-spacing: var(--ls-wide);
      text-anchor: middle;
      fill: var(--color-brand-hover);
   }

   .chart__crossover .chart__crossover-sub {
      font-weight: var(--fw-body);
      letter-spacing: 0;
      fill: var(--color-text-secondary);
   }

   .chart__crossover line {
      stroke: var(--color-brand-hover);
      stroke-width: 1.5;
   }

   .chart__crossover polygon {
      fill: var(--color-brand-hover);
   }

   .chart__crossover circle {
      fill: var(--color-surface-card);
      stroke: var(--color-brand-hover);
      stroke-width: 2;
   }

   /* -------------------------------------------------------------- callout */

   .callout {
      background-color: var(--color-surface-inset);
      border: 1px solid var(--color-border-card);
      border-radius: var(--radius-card);
      padding: var(--space-card);
      color: var(--color-text-secondary);
   }

   /* ---------------------------------------------------------- screenshots */

   .screenshot-grid {
      display: grid;
      gap: var(--space-lg);
   }

   .screenshot figcaption {
      margin-block-start: var(--space-xs);
      font-size: var(--fs-small);
      color: var(--color-text-muted);
   }

   @media (min-width: 48rem) {
      .screenshot-grid {
         grid-template-columns: repeat(2, minmax(0, 1fr));
         max-inline-size: calc(var(--width-slot) * 2 + var(--space-lg));
         margin-inline: auto;
      }
   }

   /* -------------------------------------------------------------- pricing */

   .pricing-card {
      max-inline-size: 42rem;
      margin-inline: auto;
      background-color: var(--color-surface-card);
      border: 1px solid var(--color-brand-border);
      border-block-start: var(--border-width-accent) solid var(--color-brand);
      border-radius: var(--radius-panel);
      padding: var(--space-panel);
   }

   .pricing-card > * + * {
      margin-block-start: var(--space-md);
   }

   .pricing-card__price {
      font-family: var(--ff-heading);
      font-weight: var(--fw-heading-strong);
      font-size: var(--fs-price);
      line-height: var(--lh-tight);
      letter-spacing: var(--ls-tight);
      color: var(--color-text-primary);
      margin-block-start: var(--space-2xs);
   }

   .pricing-card__summary {
      color: var(--color-text-secondary);
      margin-block-start: var(--space-2xs);
   }

   .pricing-card__row {
      border-block-start: 1px solid var(--color-border-card);
      padding-block-start: var(--space-md);
   }

   .pricing-card .btn {
      margin-block-start: var(--space-lg);
   }

   /* ------------------------------------------------------------------ faq */

   .faq {
      display: grid;
      gap: var(--space-sm);
   }

   .faq__item {
      background-color: var(--color-surface-card);
      border: 1px solid var(--color-border-card);
      border-inline-start: var(--border-width-accent) solid
         var(--color-border-accent);
      border-radius: var(--radius-card);
   }

   .faq__item summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-sm);
      padding: var(--space-card);
      cursor: pointer;
      list-style: none;
      font-family: var(--ff-heading);
      font-weight: var(--fw-heading);
      font-size: var(--fs-h3);
      line-height: var(--lh-heading);
      color: var(--color-text-primary);
   }

   .faq__item summary::-webkit-details-marker {
      display: none;
   }

   .faq__item summary:hover {
      background-color: var(--color-surface-alt);
   }

   .faq__item[open] summary {
      padding-block-end: var(--space-2xs);
   }

   .faq__item[open] .icon--chevron {
      transform: rotate(180deg);
   }

   .faq__item > p {
      max-inline-size: var(--width-measure);
      padding-inline: var(--space-card);
      padding-block-end: var(--space-card);
      color: var(--color-text-secondary);
   }

   /* -------------------------------------------------------------- contact */

   .contact .shell {
      text-align: center;
   }

   .contact .lead {
      margin-inline: auto;
   }

   .contact-card {
      max-inline-size: 42rem;
      margin-inline: auto;
   }

   .contact-form {
      text-align: start;
      display: grid;
      gap: var(--space-md);
      background-color: var(--color-surface-card);
      border: 1px solid var(--color-border-card);
      border-radius: var(--radius-panel);
      padding: var(--space-panel);
   }

   .field {
      display: grid;
      gap: var(--space-3xs);
   }

   .contact-form label {
      font-size: var(--fs-small);
      font-weight: var(--fw-body-strong);
      color: var(--color-text-secondary);
   }

   .contact-form input,
   .contact-form textarea {
      inline-size: 100%;
      padding: 0.75rem 1rem;
      background-color: var(--color-surface-inset);
      color: var(--color-text-primary);
      border: 1px solid var(--color-border-input);
      border-radius: var(--radius-input);
   }

   .contact-form input:hover,
   .contact-form textarea:hover {
      border-color: var(--color-brand-border);
   }

   .contact-form textarea {
      resize: vertical;
      min-block-size: 7rem;
   }

   .form-note {
      font-size: var(--fs-small);
      color: var(--color-text-muted);
      text-align: center;
   }

   .form-status > .callout {
      margin-block-start: var(--space-md);
   }

   .contact-card__links {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: var(--space-sm) var(--space-lg);
      margin-block-start: var(--space-md);
      font-size: var(--fs-small);
   }

   /* --------------------------------------------------------------- footer */

   .site-footer {
      background-color: var(--color-surface-alt);
      border-block-start: 1px solid var(--color-border-rule);
      padding-block: var(--space-xl);
      text-align: center;
   }

   .site-footer p {
      font-size: var(--fs-small);
      color: var(--color-text-muted);
   }

   .site-footer .shell > * + * {
      margin-block-start: var(--space-3xs);
   }
}

@layer utilities {
   .visually-hidden:not(:focus):not(:active) {
      clip-path: inset(50%);
      block-size: 1px;
      inline-size: 1px;
      overflow: hidden;
      position: absolute;
      white-space: nowrap;
   }

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