:root {
  --color-bg-base: #0B0D11;
  --color-bg-surface: #13171F;
  --color-bg-raised: #1E232E;
  --color-text-primary: #F3F4F6;
  --color-text-muted: #9CA3AF;
  --color-accent-action: #F97316;
  --color-accent-action-hover: #EA580C;
  --color-accent-info: #06B6D4;
  --color-focus-ring: #06B6D4;
  --color-error: #F97316;
  --color-overlay: rgba(11, 13, 17, 0.25);

  --font-heading: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --text-display: clamp(2rem, 5vw + 1rem, 3rem);
  --text-h1: clamp(1.75rem, 4vw + 0.75rem, 2.25rem);
  --text-h2: clamp(1.375rem, 3vw + 0.5rem, 1.75rem);
  --text-h3: clamp(1.125rem, 2vw + 0.5rem, 1.375rem);
  --text-body-large: clamp(1rem, 1.5vw + 0.5rem, 1.125rem);
  --text-body: clamp(0.9375rem, 1vw + 0.625rem, 1rem);
  --text-caption: clamp(0.75rem, 0.75vw + 0.5rem, 0.8125rem);
  --text-button: clamp(0.9375rem, 1vw + 0.625rem, 1rem);

  --leading-display: 1.1;
  --leading-h1: 1.2;
  --leading-h2: 1.25;
  --leading-h3: 1.3;
  --leading-body: 1.6;
  --leading-caption: 1.4;
  --leading-button: 1;

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  --tracking-heading: -0.02em;
  --tracking-body: 0;

  --space-2: 0.125rem;
  --space-4: 0.25rem;
  --space-8: 0.5rem;
  --space-16: 1rem;
  --space-24: 1.5rem;
  --space-32: 2rem;
  --space-48: 3rem;
  --space-64: 4rem;
  --space-96: 6rem;

  --container-max: 75rem;
  --container-padding-mobile: 1rem;
  --container-padding-desktop: 1.5rem;

  --radius-none: 0;
  --radius-control: 0.25rem;
  --radius-max: 0.5rem;

  --border-default: 1px solid var(--color-bg-raised);
  --border-active: 2px solid var(--color-accent-action);
  --border-focus: 2px solid var(--color-focus-ring);
  --border-focus-offset: 2px;

  --shadow-raised: 0 4px 12px rgba(0, 0, 0, 0.4);

  --transition-fast: 150ms ease-out;
  --transition-medium: 200ms ease-out;

  --target-size-min: 2.75rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  min-width: 20rem;
  background-color: var(--color-bg-base);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

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

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

button {
  background: none;
  border: none;
  cursor: pointer;
  min-height: var(--target-size-min);
}

a {
  color: var(--color-accent-action);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-action-hover);
}

a:focus-visible {
  outline: var(--border-focus);
  outline-offset: var(--border-focus-offset);
  border-radius: var(--radius-control);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-heading);
  color: var(--color-text-primary);
  line-height: var(--leading-h2);
  margin-block-end: var(--space-16);
}

h1 {
  font-size: var(--text-h1);
  font-weight: var(--weight-bold);
  line-height: var(--leading-h1);
  margin-block-end: var(--space-24);
}

h2 {
  font-size: var(--text-h2);
  line-height: var(--leading-h2);
  margin-block-end: var(--space-24);
}

h3 {
  font-size: var(--text-h3);
  line-height: var(--leading-h3);
  margin-block-end: var(--space-16);
}

h4,
h5,
h6 {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  margin-block-end: var(--space-8);
}

p {
  margin-block-end: var(--space-24);
  line-height: var(--leading-body);
}

ul,
ol {
  margin-block-end: var(--space-24);
  padding-inline-start: var(--space-24);
}

blockquote {
  margin-block-end: var(--space-24);
  padding-inline-start: var(--space-16);
  border-inline-start: 2px solid var(--color-accent-info);
  color: var(--color-text-primary);
  font-size: var(--text-body-large);
  line-height: var(--leading-body);
}

figure {
  margin-block-end: var(--space-24);
}

figcaption {
  font-size: var(--text-caption);
  color: var(--color-text-muted);
  margin-block-start: var(--space-8);
}

hr {
  border: none;
  border-block-start: var(--border-default);
  margin-block: var(--space-32);
}

address {
  font-style: normal;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-block-end: var(--space-24);
}

th,
td {
  padding: var(--space-8) var(--space-16);
  border-block-end: var(--border-default);
  text-align: start;
  vertical-align: top;
}

th {
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

caption {
  font-size: var(--text-caption);
  color: var(--color-text-muted);
  margin-block-end: var(--space-8);
  text-align: start;
}

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

@media (min-width: 48rem) {
  .container {
    padding-inline: var(--container-padding-desktop);
  }
}

.surface {
  background-color: var(--color-bg-surface);
  border: var(--border-default);
  border-radius: var(--radius-none);
  padding: var(--space-24);
}

.surface-raised {
  background-color: var(--color-bg-raised);
  border: var(--border-default);
  border-radius: var(--radius-none);
  padding: var(--space-24);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  min-height: var(--target-size-min);
  padding: var(--space-8) var(--space-16);
  font-family: var(--font-body);
  font-size: var(--text-button);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-button);
  letter-spacing: var(--tracking-body);
  border-radius: var(--radius-control);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: var(--border-focus);
  outline-offset: var(--border-focus-offset);
}

.btn-primary {
  background-color: var(--color-accent-action);
  color: var(--color-bg-base);
  border: 2px solid var(--color-accent-action);
}

.btn-primary:hover {
  background-color: var(--color-accent-action-hover);
  border-color: var(--color-accent-action-hover);
  color: var(--color-bg-base);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-text-primary);
}

.btn-secondary:hover {
  background-color: var(--color-bg-raised);
  border-color: var(--color-text-primary);
  color: var(--color-text-primary);
}

.btn-link {
  background: none;
  border: none;
  color: var(--color-accent-action);
  padding: var(--space-8) var(--space-4);
  min-height: var(--target-size-min);
  font-weight: var(--weight-medium);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.btn-link:hover {
  color: var(--color-accent-action-hover);
}

.form-field {
  display: block;
  width: 100%;
  min-height: var(--target-size-min);
  padding: var(--space-8) var(--space-16);
  background-color: var(--color-bg-raised);
  border: var(--border-default);
  border-radius: var(--radius-control);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

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

.form-field:focus {
  outline: none;
  border-color: var(--color-accent-info);
  background-color: var(--color-bg-raised);
}

.form-field:focus-visible {
  outline: var(--border-focus);
  outline-offset: var(--border-focus-offset);
  border-color: var(--color-accent-info);
}

.form-field:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-label {
  display: block;
  margin-block-end: var(--space-8);
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}

.form-group {
  margin-block-end: var(--space-16);
}

.form-error {
  display: block;
  margin-block-start: var(--space-4);
  font-size: var(--text-caption);
  color: var(--color-error);
}

.flex {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-16);
  min-width: 0;
}

.flex > * {
  min-width: 0;
  flex-shrink: 1;
}

.flex-nowrap {
  flex-wrap: nowrap;
}

.flex-column {
  flex-direction: column;
}

.flex-align-center {
  align-items: center;
}

.flex-align-start {
  align-items: flex-start;
}

.flex-align-end {
  align-items: flex-end;
}

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

.flex-justify-center {
  justify-content: center;
}

.flex-justify-end {
  justify-content: flex-end;
}

.flex-justify-between {
  justify-content: space-between;
}

.flex-gap-8 {
  gap: var(--space-8);
}

.flex-gap-16 {
  gap: var(--space-16);
}

.flex-gap-24 {
  gap: var(--space-24);
}

.flex-gap-32 {
  gap: var(--space-32);
}

.flex-gap-48 {
  gap: var(--space-48);
}

.flex-grow {
  flex-grow: 1;
}

.flex-shrink-0 {
  flex-shrink: 0;
}

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

.skip-link {
  position: absolute;
  top: var(--space-8);
  left: var(--space-8);
  z-index: 1000;
  padding: var(--space-8) var(--space-16);
  background-color: var(--color-bg-surface);
  color: var(--color-text-primary);
  border: var(--border-default);
  border-radius: var(--radius-control);
  transform: translateY(-200%);
  transition: transform var(--transition-fast);
}

.skip-link:focus {
  transform: translateY(0);
  outline: var(--border-focus);
  outline-offset: var(--border-focus-offset);
}

:focus-visible {
  outline: var(--border-focus);
  outline-offset: var(--border-focus-offset);
  border-radius: var(--radius-control);
}

::selection {
  background-color: var(--color-accent-action);
  color: var(--color-bg-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;
  }
}