:root {
  --color-crystal-white: #ffffff;
  --color-ice-mist: #f8fafc;
  --color-frost-panel: #f1f5f9;
  --color-cobalt-action: #2563eb;
  --color-cobalt-hover: #3b82f6;
  --color-electric-cyan: #06b6d4;
  --color-holographic-lavender: #8b5cf6;
  --color-sunlight-amber: #f59e0b;
  --color-ink-onyx: #0f172a;
  --color-slate-charcoal: #475569;
  --color-white-on-action: #ffffff;
  --color-border-neutral: #cbd5e1;
  --color-border-muted: rgba(71, 85, 105, 0.18);
  --color-focus-ring: #06b6d4;

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

  --font-size-technical: 0.75rem;
  --font-size-caption: 0.875rem;
  --font-size-body: 1rem;
  --font-size-lead: 1.125rem;
  --font-size-card-title: 1.375rem;
  --font-size-section: clamp(1.75rem, 4vw, 2.25rem);
  --font-size-display: clamp(2.5rem, 6vw, 3.25rem);

  --line-height-technical: 1.3;
  --line-height-caption: 1.4;
  --line-height-body: 1.6;
  --line-height-lead: 1.5;
  --line-height-heading: 1.12;
  --line-height-display: 1.05;

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

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 5rem;
  --space-10: 7rem;

  --container-max: 75rem;
  --container-padding: 1rem;
  --container-inline: min(
    calc(100% - (var(--container-padding) * 2)),
    var(--container-max)
  );

  --section-padding: 3.5rem;
  --section-padding-compact: 2.5rem;

  --radius-sm: 0.5rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.875rem;
  --cut-size: 0.625rem;

  --shadow-action: 0 4px 16px rgba(37, 99, 235, 0.1);
  --shadow-elevated: 0 12px 32px rgba(15, 23, 42, 0.08);
  --shadow-glow-cyan: 0 0 0 1px rgba(6, 182, 212, 0.18),
    0 0 20px rgba(6, 182, 212, 0.18);

  --transition-fast: 180ms ease-out;
  --transition-base: 220ms ease-out;

  --surface-frosted: rgba(255, 255, 255, 0.8);
  --surface-frosted-opaque: #ffffff;
  --gradient-luminous: linear-gradient(
    135deg,
    var(--color-electric-cyan),
    var(--color-holographic-lavender)
  );
  --gradient-atmosphere: radial-gradient(
      circle at 10% 15%,
      rgba(6, 182, 212, 0.08),
      transparent 32rem
    ),
    radial-gradient(
      circle at 90% 12%,
      rgba(139, 92, 246, 0.07),
      transparent 30rem
    ),
    linear-gradient(180deg, var(--color-crystal-white), var(--color-ice-mist));
}

@media (min-width: 48rem) {
  :root {
    --container-padding: 1.5rem;
    --section-padding: 5rem;
  }
}

@media (min-width: 75rem) {
  :root {
    --container-padding: 2rem;
    --section-padding: 7rem;
  }
}

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

html {
  min-width: 20rem;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  min-width: 20rem;
  min-height: 100vh;
  margin: 0;
  overflow-x: clip;
  background: var(--color-crystal-white);
  color: var(--color-slate-charcoal);
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-body);
  text-rendering: optimizeLegibility;
}

main,
header,
footer,
section,
article,
aside,
nav,
figure,
figcaption,
form,
fieldset,
details,
summary {
  min-width: 0;
}

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

img,
video {
  height: auto;
}

img {
  font-style: italic;
}

svg {
  fill: currentColor;
}

iframe {
  border: 0;
}

button,
input,
select,
textarea {
  max-width: 100%;
  color: inherit;
  font: inherit;
}

button,
select {
  text-transform: none;
}

button,
[type="button"],
[type="reset"],
[type="submit"] {
  cursor: pointer;
}

button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

textarea {
  min-height: 7rem;
  resize: vertical;
}

table {
  width: 100%;
  border-collapse: collapse;
  border-spacing: 0;
}

a {
  color: var(--color-cobalt-action);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

a:hover {
  color: var(--color-cobalt-hover);
}

a:not([class]) {
  overflow-wrap: anywhere;
}

:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

::selection {
  background: rgba(6, 182, 212, 0.24);
  color: var(--color-ink-onyx);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-block: 0 var(--space-4);
  color: var(--color-ink-onyx);
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.03em;
  line-height: var(--line-height-heading);
  overflow-wrap: anywhere;
}

h1 {
  font-size: var(--font-size-display);
  line-height: var(--line-height-display);
}

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

h3 {
  font-size: var(--font-size-card-title);
  line-height: 1.3;
}

h4 {
  font-size: var(--font-size-lead);
  line-height: 1.35;
}

h5,
h6 {
  font-size: var(--font-size-body);
  line-height: 1.4;
}

p {
  margin-block: 0 var(--space-4);
}

ul,
ol {
  margin-block: 0 var(--space-4);
  padding-inline-start: 1.25rem;
}

li::marker {
  color: var(--color-electric-cyan);
}

blockquote {
  margin-block: 0 var(--space-5);
  margin-inline: 0;
  padding: var(--space-4) var(--space-5);
  border-inline-start: 3px solid var(--color-electric-cyan);
  background: var(--color-ice-mist);
  color: var(--color-ink-onyx);
}

hr {
  height: 1px;
  margin-block: var(--space-6);
  border: 0;
  background: var(--color-border-muted);
}

figure {
  margin: 0 0 var(--space-5);
}

figcaption {
  margin-top: var(--space-3);
  color: var(--color-slate-charcoal);
  font-size: var(--font-size-caption);
  line-height: var(--line-height-caption);
}

dl {
  margin-block: 0 var(--space-4);
}

dt {
  color: var(--color-ink-onyx);
  font-weight: var(--font-weight-semibold);
}

dd {
  margin: 0 0 var(--space-3);
}

small {
  font-size: var(--font-size-technical);
  line-height: var(--line-height-technical);
}

code,
kbd,
samp,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

code,
kbd {
  border-radius: var(--radius-sm);
  background: var(--color-frost-panel);
  color: var(--color-ink-onyx);
  padding: 0.12em 0.35em;
}

pre {
  margin-block: 0 var(--space-5);
  overflow-x: auto;
  padding: var(--space-4);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-md);
  background: var(--color-ice-mist);
  color: var(--color-ink-onyx);
}

pre code {
  padding: 0;
  background: transparent;
}

label {
  display: inline-block;
  margin-bottom: var(--space-2);
  color: var(--color-ink-onyx);
  font-family: var(--font-heading);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-caption);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--color-border-neutral);
  border-radius: var(--radius-sm);
  background: var(--color-crystal-white);
  padding: 0.6875rem 0.75rem;
  line-height: 1.4;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

input::placeholder,
textarea::placeholder {
  color: #94a3b8;
  opacity: 1;
}

input:hover,
select:hover,
textarea:hover {
  border-color: rgba(37, 99, 235, 0.55);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--color-electric-cyan);
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

input[type="checkbox"],
input[type="radio"] {
  width: 1rem;
  min-width: 1rem;
  height: 1rem;
  margin: 0;
  accent-color: var(--color-cobalt-action);
}

fieldset {
  margin: 0 0 var(--space-5);
  padding: var(--space-4);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-md);
}

legend {
  padding-inline: var(--space-2);
  color: var(--color-ink-onyx);
  font-family: var(--font-heading);
  font-weight: var(--font-weight-semibold);
}

button,
.button {
  display: inline-flex;
  min-width: 0;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.6875rem 1rem;
  background: var(--color-cobalt-action);
  box-shadow: var(--shadow-action);
  color: var(--color-white-on-action);
  font-family: var(--font-heading);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: background-color var(--transition-base), border-color var(--transition-base),
    box-shadow var(--transition-base), color var(--transition-base),
    transform var(--transition-base);
}

button:hover,
.button:hover {
  background: var(--color-cobalt-hover);
  box-shadow: var(--shadow-action), 0 0 18px rgba(6, 182, 212, 0.28);
  color: var(--color-white-on-action);
}

button:active,
.button:active {
  transform: translateY(1px);
}

button:focus-visible,
.button:focus-visible {
  outline: 2px solid var(--color-electric-cyan);
  outline-offset: 2px;
}

.button--secondary {
  border-color: var(--color-cobalt-action);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: none;
  color: var(--color-cobalt-action);
}

.button--secondary:hover {
  border-color: var(--color-cobalt-hover);
  background: var(--color-ice-mist);
  box-shadow: 0 0 16px rgba(6, 182, 212, 0.14);
  color: var(--color-cobalt-hover);
}

.button--ghost {
  border-color: var(--color-border-neutral);
  background: transparent;
  box-shadow: none;
  color: var(--color-ink-onyx);
}

.button--ghost:hover {
  border-color: var(--color-electric-cyan);
  background: var(--color-ice-mist);
  box-shadow: none;
  color: var(--color-ink-onyx);
}

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

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

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

.section--ice {
  background: var(--color-ice-mist);
}

.section--atmosphere {
  background: var(--gradient-atmosphere);
}

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

.stack--compact {
  gap: var(--space-3);
}

.stack--loose {
  gap: var(--space-6);
}

.cluster {
  display: flex;
  min-width: 0;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.cluster--compact {
  gap: var(--space-2);
}

.cluster--spread {
  justify-content: space-between;
}

.content-list {
  display: grid;
  gap: var(--space-2);
  margin-block: 0 var(--space-4);
  padding-inline-start: 1.25rem;
}

.surface {
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-md);
  background: var(--color-crystal-white);
  box-shadow: var(--shadow-elevated);
}

.surface--frosted {
  background: var(--surface-frosted-opaque);
}

@supports (backdrop-filter: blur(1px)) {
  .surface--frosted {
    background: var(--surface-frosted);
    backdrop-filter: blur(14px);
  }
}

.surface--featured {
  position: relative;
  isolation: isolate;
  border: 0;
  border-radius: var(--radius-md);
  background: var(--surface-frosted-opaque);
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut-size)) 0,
    100% var(--cut-size),
    100% 100%,
    0 100%
  );
  box-shadow: var(--shadow-elevated);
}

.surface--featured::before {
  position: absolute;
  z-index: -2;
  inset: 0;
  border-radius: inherit;
  background: var(--gradient-luminous);
  content: "";
}

.surface--featured::after {
  position: absolute;
  z-index: -1;
  inset: 1px;
  border-radius: calc(var(--radius-md) - 1px);
  background: var(--surface-frosted-opaque);
  content: "";
}

@supports (backdrop-filter: blur(1px)) {
  .surface--featured::after {
    background: var(--surface-frosted);
    backdrop-filter: blur(14px);
  }
}

.surface__body {
  min-width: 0;
  padding: var(--space-5);
}

.surface__body > :last-child,
.stack > :last-child,
.stack--compact > :last-child,
.stack--loose > :last-child {
  margin-bottom: 0;
}

.technical-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-slate-charcoal);
  font-family: var(--font-heading);
  font-size: var(--font-size-technical);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.08em;
  line-height: var(--line-height-technical);
  text-transform: uppercase;
}

.technical-label::before {
  width: 0.5rem;
  height: 0.5rem;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--color-electric-cyan);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.48);
  content: "";
}

.badge {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  border-radius: 999px;
  background: rgba(245, 158, 11, 0.18);
  color: var(--color-ink-onyx);
  font-family: var(--font-heading);
  font-size: var(--font-size-technical);
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  padding: 0.35rem 0.625rem;
}

.divider {
  width: 100%;
  height: 1px;
  border: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(6, 182, 212, 0.6),
    rgba(139, 92, 246, 0.5),
    transparent
  );
}

.media-frame {
  overflow: hidden;
  border: 1px solid rgba(6, 182, 212, 0.45);
  border-radius: var(--radius-lg);
  background: var(--color-frost-panel);
  box-shadow: var(--shadow-elevated);
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut-size)) 0,
    100% var(--cut-size),
    100% 100%,
    0 100%
  );
}

.media-frame > img,
.media-frame > picture > img,
.media-frame > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: var(--media-position, center);
}

@media (min-width: 48rem) {
  .surface__body {
    padding: var(--space-6);
  }
}

@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;
  }

  button:active,
  .button:active {
    transform: none;
  }
}