:root {
  --color-ink-blue-black: #0A0E17;
  --color-midnight-blue: #141A2E;
  --color-silver-white: #E6EAF2;
  --color-ultramarine: #3A5BFF;
  --color-violet: #8A5CFF;
  --color-deep-navy: #1C2438;
  --color-muted-silver: #A0A8B8;
  --color-error-red: #FF5C5C;
  --color-border-subtle: rgba(230, 234, 242, 0.1);
  --color-border-strong: rgba(230, 234, 242, 0.2);
  --color-border-stronger: rgba(230, 234, 242, 0.3);
  --color-border-strongest: rgba(230, 234, 242, 0.6);
  --color-focus-glow: rgba(58, 91, 255, 0.2);
  --color-focus-ring: rgba(58, 91, 255, 0.3);
  --color-ultramarine-hover: #5A7BFF;

  --font-heading: 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;

  --text-h1-size: clamp(2.5rem, 5vw + 1rem, 3.5rem);
  --text-h1-line-height: 1.1;
  --text-h1-weight: 300;
  --text-h1-letter-spacing: -0.02em;

  --text-h2-size: clamp(2rem, 4vw + 0.5rem, 2.5rem);
  --text-h2-line-height: 1.2;
  --text-h2-weight: 300;
  --text-h2-letter-spacing: -0.01em;

  --text-h3-size: clamp(1.5rem, 2.5vw + 0.5rem, 1.75rem);
  --text-h3-line-height: 1.3;
  --text-h3-weight: 400;
  --text-h3-letter-spacing: 0;

  --text-h4-size: 1.25rem;
  --text-h4-line-height: 1.4;
  --text-h4-weight: 500;
  --text-h4-letter-spacing: 0.01em;

  --text-body-large-size: 1.125rem;
  --text-body-large-line-height: 1.6;
  --text-body-large-weight: 400;

  --text-body-size: 1rem;
  --text-body-line-height: 1.6;
  --text-body-weight: 400;

  --text-body-small-size: 0.875rem;
  --text-body-small-line-height: 1.5;
  --text-body-small-weight: 400;

  --text-caption-size: 0.75rem;
  --text-caption-line-height: 1.4;
  --text-caption-weight: 500;
  --text-caption-letter-spacing: 0.05em;

  --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-3xl: 6rem;
  --space-4xl: 8rem;

  --container-max-width: 1200px;
  --container-padding-mobile: 1.5rem;
  --container-padding-tablet: 2rem;
  --container-padding-desktop: 3rem;

  --surface-card-bg: rgba(28, 36, 56, 0.8);
  --surface-card-blur: blur(8px);
  --surface-card-border: 1px solid rgba(230, 234, 242, 0.1);
  --surface-card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --surface-card-shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.2);

  --radius-none: 0;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.2s ease-out;
  --transition-base: 0.3s ease-out;
  --transition-slow: 0.8s ease-out;
  --transition-reveal: 1.2s ease-out;

  --focus-ring-width: 2px;
  --focus-ring-offset: 2px;
  --focus-ring-color: var(--color-ultramarine);
  --focus-ring-glow: 0 0 0 4px var(--color-focus-glow);

  --touch-target-min: 44px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  background: linear-gradient(
    to bottom,
    var(--color-ink-blue-black) 0%,
    var(--color-midnight-blue) 100%
  );
  background-attachment: fixed;
  color: var(--color-silver-white);
  font-family: var(--font-body);
  font-size: var(--text-body-size);
  font-weight: var(--text-body-weight);
  line-height: var(--text-body-line-height);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  hyphens: auto;
  overflow-wrap: break-word;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--color-silver-white);
  hyphens: auto;
  overflow-wrap: break-word;
  max-width: 50ch;
}

h1 {
  font-size: var(--text-h1-size);
  line-height: var(--text-h1-line-height);
  font-weight: var(--text-h1-weight);
  letter-spacing: var(--text-h1-letter-spacing);
  margin-block-end: var(--space-md);
}

h2 {
  font-size: var(--text-h2-size);
  line-height: var(--text-h2-line-height);
  font-weight: var(--text-h2-weight);
  letter-spacing: var(--text-h2-letter-spacing);
  margin-block-end: var(--space-md);
}

h3 {
  font-size: var(--text-h3-size);
  line-height: var(--text-h3-line-height);
  font-weight: var(--text-h3-weight);
  letter-spacing: var(--text-h3-letter-spacing);
  margin-block-end: var(--space-sm);
}

h4 {
  font-size: var(--text-h4-size);
  line-height: var(--text-h4-line-height);
  font-weight: var(--text-h4-weight);
  letter-spacing: var(--text-h4-letter-spacing);
  margin-block-end: var(--space-sm);
}

h5,
h6 {
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  font-weight: 500;
  margin-block-end: var(--space-sm);
}

p {
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  font-weight: var(--text-body-weight);
  color: var(--color-silver-white);
  margin-block-end: var(--space-md);
  hyphens: auto;
  overflow-wrap: break-word;
}

a {
  color: var(--color-silver-white);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-violet);
  text-decoration: underline;
}

a:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  box-shadow: var(--focus-ring-glow);
  border-radius: var(--radius-sm);
}

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

ul {
  list-style: disc;
}

ol {
  list-style: decimal;
}

li {
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  color: var(--color-silver-white);
}

ul ul,
ol ul,
ul ol,
ol ol {
  margin-block-end: 0;
  margin-block-start: var(--space-2xs);
}

blockquote {
  margin-block-end: var(--space-md);
  padding-inline-start: var(--space-md);
  border-inline-start: 2px solid var(--color-ultramarine);
  color: var(--color-muted-silver);
  font-style: italic;
}

blockquote p {
  color: inherit;
  margin-block-end: var(--space-sm);
}

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

figcaption {
  font-size: var(--text-caption-size);
  line-height: var(--text-caption-line-height);
  font-weight: var(--text-caption-weight);
  letter-spacing: var(--text-caption-letter-spacing);
  text-transform: uppercase;
  color: var(--color-muted-silver);
  margin-block-start: var(--space-2xs);
}

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

img {
  opacity: 1;
  transform: translateY(20px);
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

img.is-loaded,
img.is-visible {
  opacity: 1;
  transform: translateY(0);
}

img:hover {
  transform: scale(1.02);
  transition: transform var(--transition-slow);
}

picture {
  display: block;
}

hr {
  border: none;
  border-top: 1px solid rgba(58, 91, 255, 0.2);
  margin-block: var(--space-xl);
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
  margin: 0;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  min-width: var(--touch-target-min);
  min-height: var(--touch-target-min);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), box-shadow var(--transition-base);
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  box-shadow: var(--focus-ring-glow);
}

input,
select,
textarea {
  background-color: var(--color-deep-navy);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: var(--color-silver-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: var(--touch-target-min);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-muted-silver);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--color-ultramarine);
  box-shadow: 0 0 0 2px var(--color-focus-ring);
  outline: none;
}

select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23A0A8B8' stroke-width='2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-inline-end: 2.5rem;
}

textarea {
  resize: vertical;
  min-height: 100px;
}

label {
  display: block;
  font-size: var(--text-body-small-size);
  font-weight: 500;
  color: var(--color-silver-white);
  margin-block-end: var(--space-2xs);
}

fieldset {
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-block-end: var(--space-md);
}

legend {
  font-size: var(--text-body-small-size);
  font-weight: 500;
  color: var(--color-silver-white);
  padding-inline: var(--space-2xs);
}

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

th,
td {
  padding: var(--space-sm);
  text-align: start;
  border-bottom: 1px solid var(--color-border-subtle);
}

th {
  font-weight: 500;
  color: var(--color-silver-white);
}

td {
  color: var(--color-muted-silver);
}

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

.container--wide {
  max-width: 1400px;
}

.surface-card {
  background-color: var(--surface-card-bg);
  backdrop-filter: var(--surface-card-blur);
  -webkit-backdrop-filter: var(--surface-card-blur);
  border: var(--surface-card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--surface-card-shadow);
  padding: var(--space-lg);
}

.surface-card--subtle {
  box-shadow: var(--surface-card-shadow-subtle);
  background-color: rgba(28, 36, 56, 0.6);
}

.surface-card--elevated {
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  background-color: rgba(28, 36, 56, 0.9);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  min-width: var(--touch-target-min);
  min-height: var(--touch-target-min);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  text-decoration: none;
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), box-shadow var(--transition-base);
  cursor: pointer;
}

.btn:hover {
  text-decoration: none;
}

.btn:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  box-shadow: var(--focus-ring-glow);
}

.btn--primary {
  background-color: var(--color-ultramarine);
  color: var(--color-silver-white);
  border: 1px solid var(--color-ultramarine);
}

.btn--primary:hover {
  background-color: var(--color-ultramarine-hover);
  border-color: var(--color-ultramarine-hover);
  color: var(--color-silver-white);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-silver-white);
  border: 1px solid var(--color-border-strongest);
}

.btn--secondary:hover {
  border-color: var(--color-border-strongest);
  color: var(--color-silver-white);
  background-color: rgba(230, 234, 242, 0.05);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-silver-white);
  border: none;
  padding: 0.5rem 0.75rem;
}

.btn--ghost:hover {
  color: var(--color-violet);
  background-color: rgba(230, 234, 242, 0.05);
}

.btn--small {
  padding: 0.5rem 1rem;
  font-size: var(--text-body-small-size);
  min-height: 36px;
}

.btn--large {
  padding: 1rem 2rem;
  font-size: var(--text-body-large-size);
  min-height: 52px;
}

.link-underline {
  color: var(--color-silver-white);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.link-underline:hover {
  color: var(--color-violet);
  border-bottom-color: var(--color-violet);
  text-decoration: none;
}

.link-underline:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  box-shadow: var(--focus-ring-glow);
  border-radius: var(--radius-sm);
}

.text-large {
  font-size: var(--text-body-large-size);
  line-height: var(--text-body-large-line-height);
  font-weight: var(--text-body-large-weight);
}

.text-small {
  font-size: var(--text-body-small-size);
  line-height: var(--text-body-small-line-height);
  font-weight: var(--text-body-small-weight);
}

.text-caption {
  font-size: var(--text-caption-size);
  line-height: var(--text-caption-line-height);
  font-weight: var(--text-caption-weight);
  letter-spacing: var(--text-caption-letter-spacing);
  text-transform: uppercase;
}

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

.text-silver {
  color: var(--color-silver-white);
}

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

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

.text-error {
  color: var(--color-error-red);
}

.section {
  padding-block: var(--space-3xl);
}

.section--compact {
  padding-block: var(--space-2xl);
}

.section--spacious {
  padding-block: var(--space-4xl);
}

.orbital-line {
  border: none;
  border-top: 1px solid rgba(58, 91, 255, 0.2);
  margin-block: var(--space-xl);
}

.orbital-line--violet {
  border-top-color: rgba(138, 92, 255, 0.2);
}

.orbital-line--subtle {
  border-top-color: rgba(230, 234, 242, 0.1);
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--delay-1 {
  transition-delay: 0.1s;
}

.reveal--delay-2 {
  transition-delay: 0.2s;
}

.reveal--delay-3 {
  transition-delay: 0.3s;
}

.reveal--delay-4 {
  transition-delay: 0.4s;
}

.visually-hidden {
  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: -100%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-ultramarine);
  color: var(--color-silver-white);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  z-index: 10000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-sm);
}

:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  box-shadow: var(--focus-ring-glow);
}

::selection {
  background-color: var(--color-ultramarine);
  color: var(--color-silver-white);
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-ink-blue-black);
}

::-webkit-scrollbar-thumb {
  background: var(--color-deep-navy);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-muted-silver);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--container-padding-tablet);
  }

  .section {
    padding-block: var(--space-3xl);
  }

  .section--compact {
    padding-block: var(--space-2xl);
  }

  .section--spacious {
    padding-block: var(--space-4xl);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-inline: var(--container-padding-desktop);
  }

  .section {
    padding-block: var(--space-3xl);
  }

  .section--compact {
    padding-block: var(--space-2xl);
  }

  .section--spacious {
    padding-block: var(--space-4xl);
  }
}

@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;
  }

  img {
    opacity: 1;
    transform: none;
    transition: none;
  }

  img:hover {
    transform: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}