:root {
  --color-ocean-black: #030712;
  --color-deep-current: #0b1528;
  --color-indigo-depth: #111c44;
  --color-frost-text: #f3f4f6;
  --color-muted-frost: rgba(243, 244, 246, 0.68);
  --color-indigo-neon: #818cf8;
  --color-indigo-neon-hover: #a5b4fc;
  --color-hairline-blue: rgba(129, 140, 248, 0.22);
  --color-glass-highlight: rgba(243, 244, 246, 0.1);
  --color-success-mint: #9fe3c2;
  --color-error-coral: #fca5a5;

  --font-body: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Space Grotesk", Inter, ui-sans-serif, system-ui, sans-serif;
  --font-editorial: Georgia, "Times New Roman", serif;

  --text-display: clamp(2.75rem, 6vw, 5.5rem);
  --text-h1: clamp(2.25rem, 4.5vw, 4rem);
  --text-h2: clamp(1.75rem, 3vw, 2.75rem);
  --text-h3: clamp(1.25rem, 2vw, 1.75rem);
  --text-body-large: 1.125rem;
  --text-body: 1rem;
  --text-label: 0.75rem;
  --text-meta: 0.8125rem;
  --text-rank: clamp(2.5rem, 6vw, 5rem);

  --leading-display: 0.98;
  --leading-h1: 1.02;
  --leading-h2: 1.08;
  --leading-h3: 1.15;
  --leading-body: 1.55;
  --leading-label: 1.2;
  --leading-meta: 1.35;

  --tracking-display: -0.055em;
  --tracking-h1: -0.045em;
  --tracking-h2: -0.035em;
  --tracking-h3: -0.02em;
  --tracking-label: 0.12em;
  --tracking-meta: 0.04em;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  --container-max: 77.5rem;
  --container-reading: 45rem;
  --gutter: 1.125rem;
  --grid-gap: 0.75rem;

  --radius-control: 0.375rem;
  --radius-panel: 0.625rem;
  --radius-feature: 1rem;

  --border-subtle: 1px solid var(--color-hairline-blue);
  --border-active: 1px solid var(--color-indigo-neon);

  --surface-glass: linear-gradient(135deg, rgba(11, 21, 40, 0.9), rgba(17, 28, 68, 0.72));
  --surface-feature: linear-gradient(135deg, rgba(17, 28, 68, 0.94), rgba(11, 21, 40, 0.88));
  --image-overlay: linear-gradient(180deg, rgba(3, 7, 18, 0.08), rgba(3, 7, 18, 0.78));

  --shadow-panel: 0 12px 40px rgba(0, 0, 0, 0.28);
  --shadow-active: 0 0 24px rgba(129, 140, 248, 0.1);
  --focus-ring: 0 0 0 2px var(--color-indigo-neon), 0 0 0 5px var(--color-ocean-black);

  --transition-fast: 160ms ease-out;
}

@media (min-width: 48rem) {
  :root {
    --gutter: 1.5rem;
    --grid-gap: 1.25rem;
  }
}

@media (min-width: 75rem) {
  :root {
    --gutter: 2rem;
    --grid-gap: 1.5rem;
  }
}

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

html {
  min-width: 20rem;
  background: var(--color-ocean-black);
  color-scheme: dark;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  min-width: 0;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background: var(--color-ocean-black);
  color: var(--color-frost-text);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 400;
  line-height: var(--leading-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main,
header,
footer,
section,
article,
aside,
nav,
form,
fieldset,
figure,
blockquote,
dl {
  min-width: 0;
}

img,
picture,
svg,
video,
canvas,
iframe {
  display: block;
  max-width: 100%;
}

img,
video {
  height: auto;
}

svg {
  fill: currentColor;
}

iframe {
  width: 100%;
  border: 0;
}

button,
input,
select,
textarea {
  margin: 0;
  color: inherit;
  font: inherit;
}

button,
select {
  text-transform: none;
}

button,
[type="button"],
[type="submit"],
[type="reset"],
label[for],
select,
summary {
  cursor: pointer;
}

button {
  border: 0;
  background: none;
}

textarea {
  min-height: 7.5rem;
  resize: vertical;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--color-hairline-blue);
  border-radius: var(--radius-control);
  background: rgba(11, 21, 40, 0.84);
  color: var(--color-frost-text);
  line-height: 1.4;
}

input,
select {
  min-height: 3rem;
  padding: 0.75rem 0.875rem;
}

textarea {
  padding: 0.75rem 0.875rem;
}

input::placeholder,
textarea::placeholder {
  color: rgba(243, 244, 246, 0.48);
  opacity: 1;
}

input:disabled,
select:disabled,
textarea:disabled,
button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

input[type="checkbox"],
input[type="radio"] {
  width: 1.125rem;
  min-height: 1.125rem;
  padding: 0;
  accent-color: var(--color-indigo-neon);
}

input[type="file"] {
  padding: 0.5rem;
}

input[type="file"]::file-selector-button {
  margin-right: var(--space-3);
  border: 0;
  border-radius: var(--radius-control);
  background: var(--color-indigo-neon);
  color: var(--color-ocean-black);
  padding: 0.5rem 0.75rem;
  font-weight: 600;
  cursor: pointer;
}

fieldset {
  margin: 0 0 var(--space-6);
  padding: var(--space-4);
  border: var(--border-subtle);
  border-radius: var(--radius-panel);
}

legend {
  padding: 0 var(--space-2);
  color: var(--color-frost-text);
  font-family: var(--font-heading);
  font-weight: 600;
}

label {
  display: inline-block;
  margin-bottom: var(--space-2);
  color: var(--color-frost-text);
  font-size: var(--text-meta);
  font-weight: 600;
  line-height: var(--leading-meta);
}

output {
  color: var(--color-muted-frost);
}

a {
  color: var(--color-frost-text);
  text-decoration-color: var(--color-indigo-neon);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--color-indigo-neon);
  text-decoration-color: currentColor;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--color-indigo-neon);
  background: rgba(17, 28, 68, 0.92);
}

::selection {
  background: var(--color-indigo-neon);
  color: var(--color-ocean-black);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-top: 0;
  color: var(--color-frost-text);
  font-family: var(--font-heading);
  font-weight: 700;
  text-wrap: balance;
}

h1 {
  margin-bottom: var(--space-6);
  font-size: var(--text-h1);
  line-height: var(--leading-h1);
  letter-spacing: var(--tracking-h1);
}

h2 {
  margin-bottom: var(--space-4);
  font-size: var(--text-h2);
  line-height: var(--leading-h2);
  letter-spacing: var(--tracking-h2);
}

h3 {
  margin-bottom: var(--space-3);
  font-size: var(--text-h3);
  font-weight: 600;
  line-height: var(--leading-h3);
  letter-spacing: var(--tracking-h3);
}

h4,
h5,
h6 {
  margin-bottom: var(--space-2);
  font-size: 1rem;
  line-height: 1.3;
}

p {
  margin-top: 0;
  margin-bottom: var(--space-4);
  color: var(--color-muted-frost);
}

small {
  font-size: var(--text-meta);
  line-height: var(--leading-meta);
}

strong,
b {
  color: var(--color-frost-text);
  font-weight: 600;
}

em,
i {
  font-style: italic;
}

mark {
  background: rgba(129, 140, 248, 0.28);
  color: var(--color-frost-text);
}

hr {
  height: 1px;
  margin: var(--space-8) 0;
  border: 0;
  background: var(--color-hairline-blue);
}

blockquote {
  margin: 0 0 var(--space-6);
  padding: var(--space-6);
  border-left: 1px solid var(--color-indigo-neon);
  background: rgba(17, 28, 68, 0.36);
  color: var(--color-frost-text);
  font-family: var(--font-editorial);
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  line-height: 1.35;
}

blockquote p {
  color: inherit;
}

blockquote cite {
  display: block;
  margin-top: var(--space-3);
  color: var(--color-muted-frost);
  font-family: var(--font-body);
  font-size: var(--text-meta);
  font-style: normal;
}

ul,
ol {
  margin-top: 0;
  margin-bottom: var(--space-6);
  padding-left: 1.25rem;
}

li {
  min-width: 0;
}

ul:not([class]) > li + li,
ol:not([class]) > dl {
  margin: 0 0 var(--space-6);
}

dt {
  color: var(--color-frost-text);
  font-weight: 600;
}

dd {
  margin: 0 0 var(--space-3);
  color: var(--color-muted-frost);
}

table {
  width: 100%;
  margin-bottom: var(--space-6);
  border-collapse: collapse;
  border-spacing: 0;
  color: var(--color-muted-frost);
  font-size: var(--text-meta);
}

caption {
  margin-bottom: var(--space-2);
  color: var(--color-muted-frost);
  text-align: left;
}

th,
td {
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-hairline-blue);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--color-frost-text);
  font-weight: 600;
}

code,
kbd,
samp,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

code,
kbd {
  border-radius: 0.25rem;
  background: rgba(129, 140, 248, 0.12);
  color: var(--color-frost-text);
  padding: 0.12em 0.3em;
}

pre {
  margin: 0 0 var(--space-6);
  overflow: auto;
  padding: var(--space-4);
  border: var(--border-subtle);
  border-radius: var(--radius-panel);
  background: var(--color-deep-current);
  color: var(--color-frost-text);
}

pre code {
  padding: 0;
  background: transparent;
}

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

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

.section {
  padding-block: var(--space-16);
}

.section--large {
  padding-block: var(--space-24);
}

.stack {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: stretch;
  gap: var(--stack-gap, var(--space-4));
}

.cluster {
  display: flex;
  min-width: 0;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--cluster-gap, var(--space-3));
}

.cluster > * {
  min-width: 0;
}

.surface {
  min-width: 0;
  border: var(--border-subtle);
  border-radius: var(--radius-panel);
  background: var(--surface-glass);
  box-shadow: var(--shadow-panel);
}

.surface--feature {
  border-radius: var(--radius-feature);
  background: var(--surface-feature);
}

.surface--padded {
  padding: var(--space-6);
}

.surface > :last-child,
.surface--padded > :last-child,
.stack > :last-child {
  margin-bottom: 0;
}

.divider {
  height: 1px;
  border: 0;
  background: var(--color-hairline-blue);
}

.eyebrow {
  margin: 0 0 var(--space-3);
  color: var(--color-indigo-neon);
  font-size: var(--text-label);
  font-weight: 600;
  line-height: var(--leading-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

.meta {
  color: var(--color-muted-frost);
  font-size: var(--text-meta);
  font-weight: 500;
  line-height: var(--leading-meta);
  letter-spacing: var(--tracking-meta);
}

.display {
  margin-top: 0;
  margin-bottom: var(--space-6);
  color: var(--color-frost-text);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: 700;
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
  text-wrap: balance;
}

.editorial-copy {
  font-family: var(--font-editorial);
}

.rank-number {
  color: var(--color-indigo-neon);
  font-family: var(--font-heading);
  font-size: var(--text-rank);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.06em;
}

.button {
  display: inline-flex;
  min-width: 0;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  padding: 0.75rem 1rem;
  background: transparent;
  color: var(--color-frost-text);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.button:hover {
  transform: translateY(-2px);
}

.button:focus-visible {
  color: var(--color-ocean-black);
}

.button--primary {
  background: var(--color-indigo-neon);
  color: var(--color-ocean-black);
}

.button--primary:hover {
  background: var(--color-indigo-neon-hover);
  color: var(--color-ocean-black);
  box-shadow: var(--shadow-active);
}

.button--secondary {
  border-color: var(--color-indigo-neon);
  color: var(--color-frost-text);
}

.button--secondary:hover {
  border-color: var(--color-indigo-neon-hover);
  background: rgba(129, 140, 248, 0.12);
  color: var(--color-indigo-neon-hover);
  box-shadow: var(--shadow-active);
}

.button--frost {
  border-color: rgba(243, 244, 246, 0.62);
}

.button--frost:hover {
  border-color: var(--color-frost-text);
  background: rgba(243, 244, 246, 0.08);
  color: var(--color-frost-text);
}

.button-group {
  display: flex;
  min-width: 0;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.form-field {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: var(--space-2);
}

.form-message {
  margin: 0;
  font-size: var(--text-meta);
  font-weight: 500;
  line-height: var(--leading-meta);
}

.form-message--success {
  color: var(--color-success-mint);
}

.form-message--error {
  color: var(--color-error-coral);
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: var(--space-3);
  left: var(--space-3);
  transform: translateY(-200%);
  border-radius: var(--radius-control);
  background: var(--color-indigo-neon);
  color: var(--color-ocean-black);
  padding: var(--space-3) var(--space-4);
  font-weight: 700;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

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

@supports (backdrop-filter: blur(1px)) {
  .surface {
    backdrop-filter: blur(16px);
  }
}

@media (max-width: 44.9375rem) {
  .section {
    padding-block: var(--space-12);
  }

  .section--large {
    padding-block: var(--space-16);
  }

  .surface--padded {
    padding: var(--space-4);
  }

  .button-group {
    align-items: stretch;
  }

  .button-group .button--primary {
    width: 100%;
    min-height: 3rem;
  }
}

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

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

  .button:hover {
    transform: none;
  }
}

ul { list-style: none !important; }
.nav-toggle { flex-direction: column; }