:root {
  --color-deep-night: #0A0E1A;
  --color-cosmic-purple: #1E1233;
  --color-void-black: #05070C;
  --color-electric-cyan: #00E5FF;
  --color-radiant-gold: #FFC857;
  --color-starlight-white: #F0F4FF;
  --color-nebula-muted: #8A9BB8;
  --color-crystal-glow: rgba(0, 229, 255, 0.4);

  --font-heading: 'Orbitron', 'Exo 2', sans-serif;
  --font-body: 'Inter', 'Roboto', sans-serif;

  --text-display: clamp(3rem, 5vw, 4rem);
  --text-h1: clamp(2.25rem, 4vw, 3rem);
  --text-h2: clamp(1.75rem, 3vw, 2.25rem);
  --text-h3: clamp(1.5rem, 2.5vw, 1.75rem);
  --text-h4: 1.25rem;
  --text-body-large: 1.125rem;
  --text-body: 1rem;
  --text-caption: 0.875rem;

  --leading-display: 1.1;
  --leading-h1: 1.2;
  --leading-h2: 1.3;
  --leading-h3: 1.4;
  --leading-h4: 1.5;
  --leading-body-large: 1.6;
  --leading-body: 1.6;
  --leading-caption: 1.5;

  --tracking-display: -0.02em;
  --tracking-h1: -0.01em;
  --tracking-h2: 0;
  --tracking-h3: 0;
  --tracking-h4: 0.01em;
  --tracking-body-large: 0.01em;
  --tracking-body: 0.01em;
  --tracking-caption: 0.02em;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  --container-max: 1200px;
  --container-padding-mobile: 24px;
  --container-padding-tablet: 48px;
  --container-padding-desktop: 64px;
  --container-padding: var(--container-padding-mobile);

  --section-spacing-mobile: 48px;
  --section-spacing-tablet: 64px;
  --section-spacing-desktop: 96px;
  --section-spacing: var(--section-spacing-mobile);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --border-color-cyan: rgba(0, 229, 255, 0.3);
  --border-color-muted: rgba(138, 155, 184, 0.3);
  --border-width: 1px;

  --glow-cyan: 0 0 12px rgba(0, 229, 255, 0.3);
  --glow-cyan-strong: 0 0 20px rgba(0, 229, 255, 0.5);
  --glow-gold: 0 0 12px rgba(255, 200, 87, 0.3);

  --surface-card-bg: rgba(30, 18, 51, 0.9);
  --surface-panel-bg: rgba(30, 18, 51, 0.9);

  --transition-fast: 200ms ease-out;
  --transition-slow: 400ms ease-out;

  --focus-ring-width: 2px;
  --focus-ring-color: var(--color-electric-cyan);
  --focus-ring-glow: var(--color-crystal-glow);
}

@media (min-width: 768px) {
  :root {
    --container-padding: var(--container-padding-tablet);
    --section-spacing: var(--section-spacing-tablet);
  }
}

@media (min-width: 1024px) {
  :root {
    --container-padding: var(--container-padding-desktop);
    --section-spacing: var(--section-spacing-desktop);
  }
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  color: var(--color-starlight-white);
  background-color: var(--color-deep-night);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
}

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

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

button {
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
}

a {
  color: var(--color-electric-cyan);
  text-decoration: none;
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

a:hover {
  color: var(--color-radiant-gold);
  text-shadow: 0 0 8px var(--color-crystal-glow);
}

a:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: 2px;
  box-shadow: 0 0 12px var(--focus-ring-glow);
  border-radius: var(--radius-sm);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-starlight-white);
  line-height: var(--leading-h2);
  letter-spacing: var(--tracking-h2);
  margin-block-end: var(--space-4);
}

h1 {
  font-size: var(--text-h1);
  line-height: var(--leading-h1);
  letter-spacing: var(--tracking-h1);
  margin-block-end: var(--space-5);
}

h2 {
  font-size: var(--text-h2);
  line-height: var(--leading-h2);
  letter-spacing: var(--tracking-h2);
  margin-block-end: var(--space-5);
}

h3 {
  font-size: var(--text-h3);
  line-height: var(--leading-h3);
  letter-spacing: var(--tracking-h3);
  margin-block-end: var(--space-4);
}

h4 {
  font-size: var(--text-h4);
  line-height: var(--leading-h4);
  letter-spacing: var(--tracking-h4);
  margin-block-end: var(--space-3);
}

h5,
h6 {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  margin-block-end: var(--space-3);
}

p {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  margin-block-end: var(--space-4);
}

ul,
ol {
  margin-block-end: var(--space-4);
  padding-inline-start: var(--space-6);
}

blockquote {
  margin-block-end: var(--space-4);
  padding-inline-start: var(--space-5);
  border-inline-start: 3px solid var(--color-electric-cyan);
  color: var(--color-nebula-muted);
  font-style: italic;
}

figure {
  margin-block-end: var(--space-5);
}

figcaption {
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  letter-spacing: var(--tracking-caption);
  color: var(--color-nebula-muted);
  margin-block-start: var(--space-2);
  text-align: center;
}

hr {
  border: none;
  border-block-start: var(--border-width) solid var(--border-color-muted);
  margin-block: var(--space-6);
}

code,
pre {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.9em;
}

pre {
  background-color: var(--color-void-black);
  border: var(--border-width) solid var(--border-color-muted);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  overflow-x: auto;
  margin-block-end: var(--space-4);
}

code {
  background-color: rgba(138, 155, 184, 0.15);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
}

pre code {
  background: none;
  padding: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-block-end: var(--space-5);
  font-size: var(--text-body);
}

th,
td {
  padding: var(--space-3) var(--space-4);
  text-align: start;
  border-block-end: var(--border-width) solid var(--border-color-muted);
}

th {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-radiant-gold);
  letter-spacing: var(--tracking-h4);
  text-transform: uppercase;
  font-size: var(--text-caption);
}

caption {
  font-size: var(--text-caption);
  color: var(--color-nebula-muted);
  margin-block-end: var(--space-2);
  text-align: start;
}

address {
  font-style: normal;
  margin-block-end: var(--space-4);
}

small {
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  letter-spacing: var(--tracking-caption);
}

strong {
  font-weight: 700;
  color: var(--color-starlight-white);
}

em {
  font-style: italic;
}

mark {
  background-color: rgba(255, 200, 87, 0.25);
  color: var(--color-radiant-gold);
  padding: 0 4px;
  border-radius: var(--radius-sm);
}

abbr[title] {
  text-decoration: underline dotted;
  text-underline-offset: 3px;
  cursor: help;
}

input,
textarea,
select {
  background-color: var(--color-void-black);
  border: var(--border-width) solid var(--border-color-muted);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  color: var(--color-starlight-white);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}

input::placeholder,
textarea::placeholder {
  color: var(--color-nebula-muted);
  opacity: 0.7;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-electric-cyan);
  box-shadow: 0 0 0 var(--focus-ring-width) var(--focus-ring-glow), var(--glow-cyan);
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: 1px;
}

textarea {
  resize: vertical;
  min-height: 120px;
}

select {
  appearance: none;
  -webkit-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='%238A9BB8' stroke-width='2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-inline-end: var(--space-8);
  cursor: pointer;
}

label {
  display: block;
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  letter-spacing: var(--tracking-caption);
  color: var(--color-nebula-muted);
  margin-block-end: var(--space-2);
  font-weight: 500;
}

fieldset {
  border: var(--border-width) solid var(--border-color-muted);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin-block-end: var(--space-5);
}

legend {
  font-family: var(--font-heading);
  font-size: var(--text-body);
  color: var(--color-radiant-gold);
  padding-inline: var(--space-2);
}

input[type="checkbox"],
input[type="radio"] {
  width: auto;
  margin-inline-end: var(--space-2);
  accent-color: var(--color-electric-cyan);
}

input[type="range"] {
  accent-color: var(--color-electric-cyan);
  padding: 0;
}

input[type="file"] {
  padding: var(--space-2);
  border-style: dashed;
}

input[type="search"] {
  border-radius: 999px;
}

input[type="color"] {
  padding: var(--space-1);
  width: 48px;
  height: 48px;
  cursor: pointer;
}

input:disabled,
textarea:disabled,
select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background-color: rgba(138, 155, 184, 0.1);
}

input[aria-invalid="true"],
textarea[aria-invalid="true"],
select[aria-invalid="true"] {
  border-color: #ff6b6b;
  box-shadow: 0 0 0 var(--focus-ring-width) rgba(255, 107, 107, 0.3);
}

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

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

.section--compact {
  padding-block: calc(var(--section-spacing) * 0.6);
}

.section--tight {
  padding-block: calc(var(--section-spacing) * 0.35);
}

.surface-card {
  background-color: var(--surface-card-bg);
  border: var(--border-width) solid var(--border-color-cyan);
  border-radius: var(--radius-lg);
  box-shadow: var(--glow-cyan);
  padding: var(--space-5);
}

.surface-panel {
  background-color: var(--surface-panel-bg);
  border: var(--border-width) solid var(--border-color-muted);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-body);
  font-weight: 700;
  letter-spacing: var(--tracking-h4);
  text-transform: uppercase;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  border: var(--border-width) solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
  line-height: 1.2;
  min-height: 44px;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: 2px;
  box-shadow: 0 0 16px var(--focus-ring-glow);
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background-color: var(--color-electric-cyan);
  color: var(--color-void-black);
  border-color: var(--color-electric-cyan);
}

.btn--primary:hover {
  background-color: #33eaff;
  border-color: #33eaff;
  box-shadow: var(--glow-cyan-strong);
  color: var(--color-void-black);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-electric-cyan);
  border-color: var(--color-electric-cyan);
}

.btn--secondary:hover {
  background-color: rgba(0, 229, 255, 0.1);
  border-color: var(--color-radiant-gold);
  color: var(--color-radiant-gold);
  box-shadow: var(--glow-gold);
}

.btn--gold {
  background-color: var(--color-radiant-gold);
  color: var(--color-void-black);
  border-color: var(--color-radiant-gold);
}

.btn--gold:hover {
  background-color: #ffd47a;
  border-color: #ffd47a;
  box-shadow: var(--glow-gold);
  color: var(--color-void-black);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-nebula-muted);
  border-color: var(--border-color-muted);
}

.btn--ghost:hover {
  background-color: rgba(138, 155, 184, 0.1);
  border-color: var(--color-nebula-muted);
  color: var(--color-starlight-white);
}

.btn--small {
  font-size: var(--text-caption);
  padding: var(--space-2) var(--space-4);
  min-height: 36px;
}

.btn--large {
  font-size: var(--text-body-large);
  padding: var(--space-4) var(--space-6);
  min-height: 52px;
}

.btn--block {
  display: flex;
  width: 100%;
}

.flex {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  min-width: 0;
}

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

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

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

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

.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--justify-around {
  justify-content: space-around;
}

.flex--gap-sm {
  gap: var(--space-2);
}

.flex--gap-md {
  gap: var(--space-4);
}

.flex--gap-lg {
  gap: var(--space-6);
}

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

.flex--grow > * {
  flex: 1 1 0;
}

.flex--auto > * {
  flex: 0 0 auto;
}

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

.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: var(--space-4);
  z-index: 10000;
  background-color: var(--color-electric-cyan);
  color: var(--color-void-black);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: var(--tracking-h4);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  color: var(--color-void-black);
  text-shadow: none;
}

:where(h1, h2, h3, h4, h5, h6, p, ul, ol, blockquote, figure, table, pre, address, hr):last-child {
  margin-block-end: 0;
}

:where(.surface-card, .surface-panel) > :last-child {
  margin-block-end: 0;
}

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

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