:root {
  --bg-base: #0a0a0a;
  --surface-1: #1a1a1a;
  --surface-2: #2b2b2b;
  --surface-1-glass: rgba(26, 26, 26, 0.8);
  --surface-2-glass: rgba(43, 43, 43, 0.8);
  --border-subtle: #4a4a4a;
  --border-glass: rgba(255, 255, 255, 0.1);
  --text-primary: #e5e4e2;
  --text-secondary: #b0b0b0;
  --accent-cyan: #00ffff;
  --accent-ultramarine: #4169e1;
  --accent-violet: #8a2be2;
  --text-on-accent: #0a0a0a;

  --font-heading: "Playfair Display", serif;
  --font-body: "Inter", sans-serif;

  --text-display: clamp(2.5rem, 5vw, 4rem);
  --text-h1: clamp(2rem, 4vw, 3rem);
  --text-h2: clamp(1.5rem, 3vw, 2.25rem);
  --text-h3: clamp(1.25rem, 2vw, 1.75rem);
  --text-body: 1rem;
  --text-small: 0.875rem;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --container-max: 1200px;
  --section-padding-desktop: var(--space-3xl);
  --section-padding-mobile: var(--space-xl);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 999px;

  --shadow-elevation: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-glow-cyan: 0 0 10px rgba(0, 255, 255, 0.3);
  --shadow-glow-violet: 0 0 10px rgba(138, 43, 226, 0.3);

  --transition-fast: 0.2s ease-in-out;
  --backdrop-blur: blur(10px);
}

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

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

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.6;
  min-height: 100vh;
  min-width: 320px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

button {
  background: none;
  border: none;
  cursor: pointer;
  touch-action: manipulation;
}

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

a:hover {
  color: var(--text-primary);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
  margin-block-end: var(--space-md);
  overflow-wrap: break-word;
}

h1 {
  font-size: var(--text-h1);
}

h2 {
  font-size: var(--text-h2);
}

h3 {
  font-size: var(--text-h3);
}

h4 {
  font-size: 1.125rem;
}

h5 {
  font-size: 1rem;
}

h6 {
  font-size: var(--text-small);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

p {
  margin-block-end: var(--space-md);
  overflow-wrap: break-word;
}

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

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

ul:last-child,
ol:last-child {
  margin-block-end: 0;
}

blockquote {
  margin-block-end: var(--space-md);
  padding-inline-start: var(--space-lg);
  border-inline-start: 3px solid var(--accent-cyan);
  color: var(--text-secondary);
  font-style: italic;
}

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

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

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

figcaption {
  color: var(--text-secondary);
  font-size: var(--text-small);
  margin-block-start: var(--space-sm);
}

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

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

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

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

td {
  color: var(--text-secondary);
}

code,
pre {
  font-family: "SF Mono", "Cascadia Code", "Consolas", monospace;
  font-size: 0.9em;
}

pre {
  background-color: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  overflow-x: auto;
  margin-block-end: var(--space-md);
}

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

::selection {
  background-color: var(--accent-cyan);
  color: var(--text-on-accent);
}

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

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

.section--alternate {
  background-color: var(--surface-1);
}

.surface {
  background-color: var(--surface-1-glass);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-elevation);
}

.surface--elevated {
  background-color: var(--surface-2-glass);
}

.card {
  background-color: var(--surface-1-glass);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-elevation);
  padding: var(--space-lg);
  overflow: hidden;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 600;
  line-height: 1.2;
  min-height: 44px;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: background-color var(--transition-fast),
    border-color var(--transition-fast), color var(--transition-fast),
    box-shadow var(--transition-fast), transform var(--transition-fast),
    opacity var(--transition-fast);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background-color: var(--accent-cyan);
  color: var(--text-on-accent);
  border-color: var(--accent-cyan);
}

.btn--primary:hover {
  background-color: var(--text-primary);
  border-color: var(--text-primary);
  color: var(--bg-base);
  box-shadow: var(--shadow-glow-cyan);
}

.btn--secondary {
  background-color: var(--accent-ultramarine);
  color: var(--text-primary);
  border-color: var(--accent-ultramarine);
}

.btn--secondary:hover {
  background-color: var(--accent-violet);
  border-color: var(--accent-violet);
  box-shadow: var(--shadow-glow-violet);
}

.btn--outline {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn--outline:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

.btn--ghost {
  background-color: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn--ghost:hover {
  color: var(--text-primary);
  background-color: var(--surface-2);
}

.form-label {
  display: block;
  font-size: var(--text-small);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-block-end: var(--space-xs);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  min-height: 44px;
  background-color: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: var(--space-sm) var(--space-md);
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: var(--text-secondary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 2px rgba(0, 255, 255, 0.25);
}

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

.form-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='%23b0b0b0' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-inline-end: var(--space-xl);
}

.form-hint {
  font-size: var(--text-small);
  color: var(--text-secondary);
  margin-block-start: var(--space-xs);
}

.form-error {
  font-size: var(--text-small);
  color: #ff6b6b;
  margin-block-start: var(--space-xs);
}

.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-md);
  z-index: 10000;
  background-color: var(--accent-cyan);
  color: var(--text-on-accent);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: top var(--transition-fast);
}

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

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

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

.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-center {
  justify-content: center;
}

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

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

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

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

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

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

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

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

.stack--gap-xs {
  gap: var(--space-xs);
}

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

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

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

.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: var(--surface-1);
}

.media img,
.media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(0, 255, 255, 0.08),
    rgba(138, 43, 226, 0.08)
  );
  pointer-events: none;
}

.media--ratio-16-9 {
  aspect-ratio: 16 / 9;
}

.media--ratio-4-3 {
  aspect-ratio: 4 / 3;
}

.media--ratio-1-1 {
  aspect-ratio: 1 / 1;
}

.media--ratio-3-2 {
  aspect-ratio: 3 / 2;
}

.overlay {
  position: relative;
}

.overlay::before {
  content: "";
  position: absolute;
  inset: 0;
  background-color: rgba(10, 10, 10, 0.4);
  border-radius: inherit;
  pointer-events: none;
}

.glow-cyan {
  box-shadow: var(--shadow-glow-cyan);
}

.glow-violet {
  box-shadow: var(--shadow-glow-violet);
}

.text-accent {
  color: var(--accent-cyan);
}

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

.text-small {
  font-size: var(--text-small);
}

.text-overline {
  font-size: var(--text-small);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.divider {
  border: none;
  border-block-start: 1px solid var(--border-subtle);
  margin-block: var(--space-xl);
}

.divider--glow {
  border-image: linear-gradient(
      90deg,
      transparent,
      var(--accent-cyan),
      transparent
    )
    1;
}

@media (max-width: 768px) {
  .section {
    padding-block: var(--section-padding-mobile);
  }

  .container {
    padding-inline: var(--space-md);
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    margin-block-end: var(--space-sm);
  }

  p,
  ul,
  ol,
  blockquote,
  figure,
  table,
  pre {
    margin-block-end: var(--space-sm);
  }

  .card {
    padding: var(--space-md);
  }

  .btn {
    min-height: 44px;
    padding: var(--space-sm) var(--space-md);
  }
}