:root {
  --space-black: #0B0E1A;
  --deep-panel: #151A2E;
  --cool-white: #F2F5FF;
  --electric-cyan: #00E5FF;
  --crewmate-red: #FF3B4E;
  --neon-lime: #B6FF3B;
  --neon-lime-hover: #C8FF66;
  --neon-lime-active: #9EE62E;
  --muted-slate: #8A93B2;
  --cyan-glow: rgba(0, 229, 255, 0.18);
  --border-default: rgba(138, 147, 178, 0.25);
  --border-subtle: rgba(138, 147, 178, 0.15);
  --border-image: rgba(138, 147, 178, 0.2);
  --surface-light: rgba(242, 245, 255, 0.08);
  --shadow-floating: 0 8px 24px rgba(0, 0, 0, 0.5);
  --font-heading: 'Space Grotesk', 'Arial Black', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --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-editorial: 1200px;
  --container-full: 1440px;
  --page-pad-mobile: 24px;
  --page-pad-tablet: 48px;
  --page-pad-desktop: 64px;
  --section-space-mobile: 64px;
  --section-space-tablet: 96px;
  --section-space-desktop: 128px;
  --radius-card: 8px;
  --radius-button: 6px;
  --radius-panel: 12px;
  --radius-pill: 999px;
  --focus-outline: 2px solid var(--electric-cyan);
  --focus-offset: 2px;
  --transition-fast: 150ms ease-out;
  --transition-menu: 200ms ease-out;
  --transition-reveal: 300ms ease-out;
}

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

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background-color: var(--space-black);
  background-image:
    radial-gradient(circle at 20% 15%, rgba(242, 245, 255, 0.04) 0%, rgba(242, 245, 255, 0.04) 1px, transparent 1px),
    radial-gradient(circle at 70% 40%, rgba(242, 245, 255, 0.03) 0%, rgba(242, 245, 255, 0.03) 1px, transparent 1px),
    radial-gradient(circle at 40% 75%, rgba(242, 245, 255, 0.05) 0%, rgba(242, 245, 255, 0.05) 1px, transparent 1px),
    radial-gradient(circle at 85% 85%, rgba(242, 245, 255, 0.03) 0%, rgba(242, 245, 255, 0.03) 1px, transparent 1px);
  background-size: 240px 240px, 320px 320px, 280px 280px, 360px 360px;
  color: var(--cool-white);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

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

a:hover {
  color: var(--cool-white);
}

ul,
ol {
  list-style-position: inside;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0;
  color: var(--cool-white);
  margin-block-end: var(--space-4);
}

h1 {
  font-size: clamp(34px, 4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-block-end: var(--space-5);
}

h2 {
  font-size: clamp(28px, 3vw, 36px);
  line-height: 1.15;
  margin-block-end: var(--space-5);
}

h3 {
  font-size: clamp(22px, 2.2vw, 24px);
  line-height: 1.25;
  margin-block-end: var(--space-4);
}

h4 {
  font-size: 20px;
  line-height: 1.3;
  margin-block-end: var(--space-3);
}

h5 {
  font-size: 18px;
  line-height: 1.35;
  margin-block-end: var(--space-3);
}

h6 {
  font-size: 16px;
  line-height: 1.4;
  margin-block-end: var(--space-2);
}

p {
  margin-block-end: var(--space-4);
  line-height: 1.65;
  font-size: 17px;
}

p:last-child {
  margin-block-end: 0;
}

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

blockquote:last-child {
  margin-block-end: 0;
}

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

figure:last-child {
  margin-block-end: 0;
}

figcaption {
  font-size: 14px;
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--muted-slate);
  margin-block-start: var(--space-2);
}

hr {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin-block: var(--space-7);
}

code,
pre {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.9em;
  background-color: var(--surface-light);
  border-radius: 4px;
}

code {
  padding: 2px 6px;
}

pre {
  padding: var(--space-4);
  overflow-x: auto;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-card);
  margin-block-end: var(--space-5);
}

pre:last-child {
  margin-block-end: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-block-end: var(--space-5);
  font-size: 16px;
}

table:last-child {
  margin-block-end: 0;
}

th,
td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

th {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-slate);
}

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-slate);
  margin-block-end: var(--space-2);
}

input,
textarea,
select {
  width: 100%;
  background-color: var(--deep-panel);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-button);
  padding: var(--space-3) var(--space-4);
  font-size: 16px;
  line-height: 1.5;
  color: var(--cool-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

input:focus,
textarea:focus,
select:focus {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
  border-color: var(--electric-cyan);
  box-shadow: 0 0 0 4px var(--cyan-glow);
}

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

select {
  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='%238A93B2' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-inline-end: var(--space-8);
}

fieldset {
  border: 1px solid var(--border-default);
  border-radius: var(--radius-card);
  padding: var(--space-5);
  margin-block-end: var(--space-5);
}

fieldset:last-child {
  margin-block-end: 0;
}

legend {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--electric-cyan);
  padding-inline: var(--space-2);
}

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

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

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

.section-label {
  display: block;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--electric-cyan);
  margin-block-end: var(--space-3);
}

.card {
  background-color: var(--deep-panel);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-card);
  padding: var(--space-5);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  border-color: rgba(0, 229, 255, 0.5);
  box-shadow: 0 0 0 3px var(--cyan-glow);
}

.card > :last-child {
  margin-block-end: 0;
}

.panel {
  background-color: var(--deep-panel);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-panel);
  padding: var(--space-5);
}

.panel > :last-child {
  margin-block-end: 0;
}

.panel-accent-cyan {
  border-inline-start: 3px solid var(--electric-cyan);
}

.panel-accent-red {
  border-inline-start: 3px solid var(--crewmate-red);
  background-color: rgba(255, 59, 78, 0.06);
}

.panel-accent-lime {
  border-inline-start: 3px solid var(--neon-lime);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-button);
  border: 1px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.btn-primary {
  background-color: var(--neon-lime);
  color: var(--space-black);
  border-color: var(--neon-lime);
}

.btn-primary:hover {
  background-color: var(--neon-lime-hover);
  border-color: var(--neon-lime-hover);
  box-shadow: 0 0 0 4px var(--cyan-glow);
  color: var(--space-black);
}

.btn-primary:active {
  background-color: var(--neon-lime-active);
  border-color: var(--neon-lime-active);
}

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

.btn-secondary:hover {
  background-color: var(--cyan-glow);
  color: var(--cool-white);
  box-shadow: 0 0 0 4px var(--cyan-glow);
}

.btn-secondary:active {
  background-color: rgba(0, 229, 255, 0.3);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.4;
}

.tag-cyan {
  background-color: rgba(0, 229, 255, 0.12);
  color: var(--electric-cyan);
  border: 1px solid rgba(0, 229, 255, 0.35);
}

.tag-red {
  background-color: rgba(255, 59, 78, 0.12);
  color: var(--crewmate-red);
  border: 1px solid rgba(255, 59, 78, 0.35);
}

.tag-lime {
  background-color: rgba(182, 255, 59, 0.12);
  color: var(--neon-lime);
  border: 1px solid rgba(182, 255, 59, 0.35);
}

.screenshot-frame {
  border-radius: var(--radius-card);
  border: 1px solid var(--border-image);
  overflow: hidden;
}

.screenshot-frame img {
  width: 100%;
  height: auto;
  display: block;
}

.screenshot-caption {
  font-size: 14px;
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--muted-slate);
  margin-block-start: var(--space-2);
}

.content-list {
  list-style: none;
  margin-block-end: var(--space-5);
}

.content-list:last-child {
  margin-block-end: 0;
}

.content-list li {
  position: relative;
  padding-inline-start: var(--space-5);
  margin-block-end: var(--space-2);
  line-height: 1.65;
}

.content-list li:last-child {
  margin-block-end: 0;
}

.content-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background-color: var(--electric-cyan);
}

.content-list-check li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  width: auto;
  height: auto;
  background: none;
  color: var(--electric-cyan);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.65;
}

.content-list-muted li::before {
  background-color: var(--muted-slate);
}

.flex-row {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--space-4);
}

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

.flex-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

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

.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: var(--space-3);
  left: var(--space-3);
  z-index: 1000;
  background-color: var(--neon-lime);
  color: var(--space-black);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-button);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transform: translateY(-200%);
  transition: transform var(--transition-fast);
}

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

@media (min-width: 768px) {
  body {
    font-size: 17px;
    line-height: 1.65;
  }

  .container,
  .container-wide {
    padding-inline: var(--page-pad-tablet);
  }

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

  .card,
  .panel {
    padding: var(--space-6);
  }
}

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

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

  p {
    font-size: 17px;
    line-height: 1.65;
  }
}

@media (max-width: 767px) {
  body {
    font-size: 16px;
    line-height: 1.7;
  }

  p {
    font-size: 16px;
    line-height: 1.7;
  }

  h1 {
    font-size: 34px;
    line-height: 1.15;
  }

  h2 {
    font-size: 28px;
    line-height: 1.2;
  }

  h3 {
    font-size: 22px;
    line-height: 1.3;
  }

  .btn {
    width: 100%;
  }

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

@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;
  }
}