/* ============================================================
   Claude Skills — Showcase Stylesheet
   Brand: #060610 | #00E5FF | #50AAE3 | #7C3AED
   Fonts: Sora | Space Grotesk | JetBrains Mono
   ============================================================ */

@layer reset, base, components, utilities;

/* Font display override for Google Fonts */
@font-face { font-family: 'Sora'; font-display: optional; }
@font-face { font-family: 'Space Grotesk'; font-display: optional; }
@font-face { font-family: 'JetBrains Mono'; font-display: optional; }

/* --- Reset --- */
@layer reset {
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
  body { min-height: 100dvh; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
  img, svg { display: block; max-width: 100%; }
  a { text-decoration: none; color: inherit; }
  button { border: none; background: none; cursor: pointer; font: inherit; color: inherit; }
  ul, ol { list-style: none; }
}

/* --- Base --- */
@layer base {
  :root {
    color-scheme: dark;
    --bg: oklch(0.08 0.02 275);
    --bg-raised: oklch(0.12 0.03 275);
    --bg-card: oklch(0.16 0.04 275);
    --bg-card-hover: oklch(0.20 0.05 275);
    --cyan: oklch(0.82 0.17 195);
    --blue: oklch(0.71 0.12 230);
    --purple: oklch(0.49 0.25 290);
    --text: oklch(0.91 0.02 285);
    --text-dim: oklch(0.68 0.04 280);
    --text-bright: oklch(1.00 0 0);
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(0, 229, 255, 0.15);
    --glow-cyan: rgba(0, 229, 255, 0.12);
    --glow-purple: rgba(124, 58, 237, 0.12);
    --radius: 12px;
    --radius-lg: 20px;
    --font-heading: 'Sora', system-ui, sans-serif;
    --font-body: 'Space Grotesk', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --container: 1200px;
  }

  body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
  }

  /* Dot grid background */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image: radial-gradient(circle, rgba(158, 158, 190, 0.08) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
  }

  /* Noise grain texture */
  body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    opacity: 0.03;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
  }

  h1, h2, h3, h4 { font-family: var(--font-heading); color: var(--text-bright); line-height: 1.15; text-wrap: balance; }
  code, pre { font-family: var(--font-mono); }
  ::selection { background: rgba(0, 229, 255, 0.25); color: #fff; }
}

/* --- Utilities --- */
@layer utilities {
  .skip-nav {
    position: absolute;
    top: -100%;
    left: 1rem;
    z-index: 1000;
    padding: 0.75rem 1.5rem;
    background: var(--cyan);
    color: var(--bg);
    font-weight: 700;
    border-radius: var(--radius);
    &:focus { top: 1rem; }
  }
  .container { max-width: var(--container); margin: 0 auto; padding: 0 clamp(1.25rem, 4vw, 2.5rem); }
  .text-cyan { color: var(--cyan); }
  .text-gradient {
    background: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 40%, var(--purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  /* Focus-visible — WCAG 2.2 SC 2.4.11 Focus Appearance */
  :focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
    border-radius: 4px;
  }
  a:focus-visible, button:focus-visible, summary:focus-visible, [tabindex]:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
  }

  .section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
  }
  .section-subtitle {
    text-align: center;
    color: var(--text-dim);
    font-size: clamp(1rem, 2vw, 1.2rem);
    max-width: 640px;
    margin: 0 auto 1.5rem;
  }

  /* Quotable answer blocks for AI/GEO citation */
  .quotable {
    text-align: center;
    color: var(--text-dim);
    font-size: 0.9rem;
    max-width: 680px;
    margin: 0 auto 3.5rem;
    line-height: 1.7;
    padding: 1rem 1.5rem;
    border-left: 2px solid var(--cyan);
    background: rgba(0, 229, 255, 0.03);
    border-radius: 0 var(--radius) var(--radius) 0;
    text-align: left;
  }

  /* Scroll reveal */
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  }
  .reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Components --- */
@layer components {

  /* ---- Navigation ---- */
  .nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 0;
    background: rgba(6, 6, 16, 0.8);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid var(--border);
  }

  .nav__inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 4vw, 2.5rem);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .nav__logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-bright);
  }

  .nav__logo-icon { font-size: 1.5rem; }

  .nav__links {
    display: flex;
    align-items: center;
    gap: 2rem;
    font-size: 0.9rem;
    color: var(--text-dim);
  }

  .nav__links a:hover { color: var(--cyan); }

  .nav__cta {
    background: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 100%);
    color: var(--bg) !important;
    padding: 0.5rem 1.25rem;
    border-radius: 999px;
    font-weight: 600;
    transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
  }

  .nav__cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--glow-cyan);
  }

  .nav__mobile {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 44px;
    min-height: 44px;
    padding: 4px 0;
  }

  .nav__mobile span {
    display: block;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
  }

  /* ---- Hero ---- */
  .hero {
    position: relative;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem clamp(1.25rem, 4vw, 2.5rem) 3rem;
    overflow: hidden;
  }

  .hero__bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
  }

  .hero__orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.35;
    animation: orb-drift 12s ease-in-out infinite alternate;
  }

  .hero__orb--cyan {
    width: 500px;
    height: 500px;
    background: var(--cyan);
    top: 10%;
    left: 20%;
    animation-delay: 0s;
  }

  .hero__orb--purple {
    width: 600px;
    height: 600px;
    background: var(--purple);
    bottom: 10%;
    right: 15%;
    animation-delay: -4s;
  }

  .hero__orb--blue {
    width: 400px;
    height: 400px;
    background: var(--blue);
    top: 50%;
    left: 55%;
    animation-delay: -8s;
  }

  @keyframes orb-drift {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -20px) scale(1.05); }
    100% { transform: translate(-20px, 30px) scale(0.95); }
  }

  .hero__grid {
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 80%);
  }

  .hero__content {
    position: relative;
    z-index: 1;
    max-width: 800px;
  }

  .hero__shields {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
  }

  .hero__shields a { display: inline-flex; }
  .hero__shields img { border-radius: 4px; }

  .hero__badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--cyan);
    border: 1px solid rgba(0, 229, 255, 0.25);
    padding: 0.35rem 1rem;
    border-radius: 999px;
    margin-bottom: 1rem;
    background: rgba(0, 229, 255, 0.05);
    animation: badge-glow 3s ease-in-out infinite alternate;
  }

  @keyframes badge-glow {
    0% { box-shadow: 0 0 0 rgba(0, 229, 255, 0); }
    100% { box-shadow: 0 0 24px rgba(0, 229, 255, 0.1); }
  }

  .hero__title {
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: 1.5rem;
  }

  .hero__subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: var(--text-dim);
    line-height: 1.7;
    margin-bottom: 2.5rem;
  }

  .hero__subtitle strong { color: var(--text-bright); }

  /* ---- Terminal Demo ---- */
  .hero__terminal {
    width: 100%;
    max-width: 600px;
    margin: 0 auto 2.5rem;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    background: rgba(6, 6, 16, 0.9);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4), 0 0 60px var(--glow-cyan);
    text-align: left;
  }

  .terminal__header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--border);
  }

  .terminal__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
  }

  .terminal__dot--red { background: #ff5f57; }
  .terminal__dot--yellow { background: #febc2e; }
  .terminal__dot--green { background: #28c840; }

  .terminal__title {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-dim);
  }

  .terminal__body {
    padding: 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    min-height: 160px;
  }

  .terminal__line {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .terminal__prompt { color: var(--cyan); font-weight: 600; }
  .terminal__typed { color: var(--text-bright); }

  .terminal__cursor {
    display: inline-block;
    width: 8px;
    height: 18px;
    background: var(--cyan);
    animation: cursor-blink 1s step-end infinite;
    vertical-align: text-bottom;
  }

  @keyframes cursor-blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
  }

  .terminal__output {
    margin-top: 0.75rem;
    color: var(--text-dim);
    font-size: 0.8rem;
    line-height: 1.6;
  }

  .terminal__output .out-success, .terminal__output-line.terminal__success { color: #28c840; }
  .terminal__output .out-cyan, .terminal__output-line.terminal__info { color: var(--cyan); }
  .terminal__output .out-dim { color: var(--text-dim); }

  .terminal__output-line {
    opacity: 0;
    animation: termFadeIn 0.3s ease forwards;
    padding: 0.1rem 0;
  }

  @keyframes termFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .hero__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
    padding: 1.5rem;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
  }

  .stat { text-align: center; }

  .stat__number {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .stat__label {
    font-size: 0.8rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 0.25rem;
    display: block;
  }

  .hero__actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.25s var(--ease);
  }

  .btn--primary {
    background: linear-gradient(135deg, var(--cyan), var(--blue));
    color: var(--bg);
    box-shadow: 0 4px 24px var(--glow-cyan);
  }

  .btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 229, 255, 0.25);
  }

  .btn--ghost {
    border: 1px solid var(--border);
    color: var(--text);
    background: rgba(255,255,255,0.03);
  }

  .btn--ghost:hover {
    border-color: var(--border-hover);
    background: rgba(0, 229, 255, 0.05);
    color: var(--cyan);
  }

  /* Hero install command */
  .hero__install-cmd {
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.25rem 0.25rem 0.25rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    max-width: 540px;
    margin: 0 auto 1rem;

    & code { color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  }

  .hero__copy-btn {
    padding: 0.6rem 1.25rem;
    background: var(--cyan);
    color: var(--bg);
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.85rem;
    flex-shrink: 0;
    transition: background 0.2s;
    &:hover { background: var(--blue); }
  }

  .hero__btns { display: flex; gap: 1rem; justify-content: center; }

  /* Compatible tools bar */
  .hero__compat {
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
  }

  .hero__compat-label {
    font-size: 0.8rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
  }

  .hero__compat-tools { display: flex; gap: 0.5rem; flex-wrap: wrap; justify-content: center; }

  .compat-tool {
    padding: 0.3rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--text-dim);
    transition: all 0.2s;
    &:hover { border-color: var(--border-hover); color: var(--cyan); }
  }

  .hero__scroll {
    position: absolute;
    bottom: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-dim);
    animation: scroll-bounce 2s ease-in-out infinite;
  }

  @keyframes scroll-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
  }

  /* ---- How It Works ---- */
  .how {
    padding: 8rem 0;
    position: relative;
  }

  .how__steps {
    display: flex;
    align-items: stretch;
    gap: 0;
    max-width: 900px;
    margin: 0 auto;
  }

  .how__step {
    flex: 1;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    position: relative;
    transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  }

  .how__step:hover {
    border-color: var(--border-hover);
    box-shadow: 0 0 40px var(--glow-cyan);
  }

  .how__step-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 1rem;
  }

  .how__step h3 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
  }

  .how__step code {
    display: block;
    font-size: 0.8rem;
    color: var(--cyan);
    background: rgba(0, 229, 255, 0.05);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    margin-bottom: 0.75rem;
    border: 1px solid rgba(0, 229, 255, 0.1);
    overflow-x: auto;
  }

  .how__step p { font-size: 0.9rem; color: var(--text-dim); text-wrap: pretty; }

  .how__connector {
    width: 40px;
    min-width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
  }

  .how__connector::after {
    content: '→';
    font-size: 1.5rem;
    color: var(--text-dim);
  }

  /* ---- Skills Grid ---- */
  .skills {
    padding: 8rem 0;
    background: var(--bg-raised);
    position: relative;
  }

  .skills::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
  }

  .skills__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
  }

  .skill-card {
    padding: 1.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.3s var(--ease);
    position: relative;
    overflow: hidden;
  }

  .skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--cyan), var(--purple));
    opacity: 0;
    transition: opacity 0.3s var(--ease);
  }

  .skill-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  }

  .skill-card:hover::before { opacity: 1; }

  .skill-card__number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--cyan);
    opacity: 0.6;
  }

  .skill-card__title {
    font-size: 1.15rem;
    margin: 0.5rem 0;
    font-weight: 700;
  }

  .skill-card__desc {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    text-wrap: pretty;
  }

  .skill-card__docs {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--purple);
    opacity: 0.8;
  }

  /* ---- Agents Grid ---- */
  .agents {
    padding: 8rem 0;
    position: relative;
  }

  .agents__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.25rem;
  }

  .agent-card {
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.3s var(--ease);
  }

  .agent-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
  }

  .agent-card__icon {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
  }

  .agent-card h3 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
  }

  .agent-card__model {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .agent-card__model { background: rgba(124, 58, 237, 0.15); color: var(--purple); }

  .agent-card p {
    font-size: 0.8rem;
    color: var(--text-dim);
    line-height: 1.5;
    text-wrap: pretty;
  }

  /* ---- Stack ---- */
  .stack {
    padding: 8rem 0;
    background: var(--bg-raised);
    position: relative;
  }

  .stack::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
  }

  .stack__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
    max-width: 960px;
    margin: 0 auto;
  }

  .stack__item {
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
  }

  .stack__category {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.75rem;
  }

  .stack__techs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .tech-badge {
    font-size: 0.85rem;
    padding: 0.4rem 0.85rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--text);
    transition: all 0.2s var(--ease);
  }

  .tech-badge:hover {
    border-color: var(--border-hover);
    background: rgba(0, 229, 255, 0.05);
    color: var(--cyan);
  }

  /* ---- Platforms ---- */
  .platforms {
    padding: 8rem 0;
    position: relative;
  }

  .platforms__categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
  }

  .platform-group {
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
  }

  .platform-group__title {
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
    color: var(--text-bright);
  }

  .platform-group__items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .platform-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    color: var(--text-dim);
    transition: all 0.2s var(--ease);
  }

  .platform-tag:hover { border-color: var(--border-hover); color: var(--text); }
  .platform-tag--modern { border-color: rgba(0, 229, 255, 0.15); color: var(--cyan); }
  .platform-tag--named { border-color: rgba(80, 170, 227, 0.15); color: var(--blue); }
  .platform-tag--dir { border-color: rgba(124, 58, 237, 0.15); color: var(--purple); }

  /* ---- Install ---- */
  .install {
    padding: 8rem 0;
    background: var(--bg-raised);
    position: relative;
  }

  .install::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
  }

  .install__methods {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
    max-width: 960px;
    margin: 0 auto;
  }

  .install__method {
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
  }

  .install__method h3 {
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    color: var(--text-bright);
  }

  .code-block {
    position: relative;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
  }

  .code-block pre {
    padding: 1rem;
    overflow-x: auto;
    font-size: 0.8rem;
    line-height: 1.6;
    color: var(--cyan);
  }

  .code-block__copy {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-dim);
    transition: all 0.2s var(--ease);
  }

  .code-block__copy:hover { background: rgba(0, 229, 255, 0.1); color: var(--cyan); }

  .code-comment { color: var(--text-dim); }

  /* ---- Author ---- */
  .author {
    padding: 8rem 0;
    position: relative;
  }

  .author__content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
  }

  .author__content p {
    color: var(--text-dim);
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    text-wrap: pretty;
  }

  .author__links {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
  }

  .author__links a {
    color: var(--cyan);
    font-size: 0.95rem;
    transition: opacity 0.2s;
  }

  .author__links a:hover { opacity: 0.7; }

  /* ---- Footer ---- */
  .footer {
    padding: 5rem 0 2rem;
    background: var(--bg-raised);
    border-top: 1px solid var(--border);
  }

  .footer__grid {
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
  }

  .footer__brand p {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-top: 1rem;
    line-height: 1.6;
  }

  .footer__col {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .footer__col h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-bright);
    margin-bottom: 0.5rem;
  }

  .footer__col a {
    font-size: 0.85rem;
    color: var(--text-dim);
    transition: color 0.2s;
  }

  .footer__col a:hover { color: var(--cyan); }

  /* Newsletter */
  .footer__newsletter {
    text-align: center;
    padding: 2.5rem 0;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
  }

  .footer__newsletter h3 {
    font-size: 1.1rem;
    color: var(--text-bright);
    margin-bottom: 0.5rem;
  }

  .footer__newsletter > p {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 1.25rem;
  }

  .newsletter-form {
    display: flex;
    gap: 0;
    max-width: 420px;
    margin: 0 auto;
  }

  .newsletter-form__input {
    flex: 1;
    padding: 0.7rem 1rem;
    border: 1px solid var(--border);
    border-right: none;
    border-radius: var(--radius) 0 0 var(--radius);
    background: var(--bg);
    color: var(--text);
    font-size: 0.9rem;
    font-family: var(--font-body);
    outline: none;
    transition: border-color 0.2s;
  }

  .newsletter-form__input:focus { border-color: var(--cyan); }

  .newsletter-form__input::placeholder { color: var(--text-dim); opacity: 0.6; }

  .newsletter-form__btn {
    padding: 0.7rem 1.5rem;
    background: var(--cyan);
    color: var(--bg);
    font-weight: 700;
    font-size: 0.85rem;
    border: none;
    border-radius: 0 var(--radius) var(--radius) 0;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    white-space: nowrap;
  }

  .newsletter-form__btn:hover { background: oklch(0.88 0.17 195); }
  .newsletter-form__btn:active { transform: scale(0.97); }

  .newsletter-form__status {
    font-size: 0.8rem;
    margin-top: 0.75rem;
    min-height: 1.2em;
    color: var(--text-dim);
  }

  .newsletter-form__status--success { color: #2ECC40; }
  .newsletter-form__status--error { color: #FF4136; }

  /* Social icons */
  .footer__social {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    padding: 1.5rem 0;
  }

  .footer__social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    color: var(--text-dim);
    transition: color 0.2s, border-color 0.2s, background 0.2s;
  }

  .footer__social a:hover {
    color: var(--cyan);
    border-color: var(--cyan);
    background: rgba(0, 229, 255, 0.08);
  }

  .footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-dim);
  }

  .footer__bottom a { color: var(--cyan); }
  .footer__contact a { text-decoration: underline; }
}

@layer components {
  /* --- Compare --- */
  .compare { padding: 6rem 0; }

  .compare__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
  }

  .compare__col {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
  }

  .compare__col--before { border-color: rgba(255, 80, 80, 0.15); }
  .compare__col--after { border-color: rgba(0, 229, 255, 0.15); box-shadow: 0 0 40px var(--glow-cyan); }

  .compare__label {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1.25rem;
  }

  .compare__col--before .compare__label { color: #ff5050; }
  .compare__col--after .compare__label { color: var(--cyan); }

  .compare__terminal {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.8;
  }

  .compare__line--dim { color: var(--text-dim); opacity: 0.6; }
  .compare__line--red { color: #ff5050; }
  .compare__line--cyan { color: var(--cyan); }
  .compare__line--green { color: #28c840; font-weight: 600; }

  /* --- Flow Diagram --- */
  .flow { padding: 6rem 0; }

  .flow__diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding: 2.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
  }

  .flow__node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 600;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    transition: all 0.25s var(--ease);
    &:hover { border-color: var(--border-hover); transform: translateY(-2px); }
  }

  .flow__node--start { border-color: var(--border-hover); }
  .flow__node--router { background: rgba(0, 229, 255, 0.08); border-color: var(--cyan); color: var(--cyan); }
  .flow__node--end { background: rgba(40, 200, 64, 0.08); border-color: #28c840; color: #28c840; }
  .flow__node--agents { background: rgba(124, 58, 237, 0.08); border-color: var(--purple); color: var(--purple); }

  .flow__icon { font-size: 1.5rem; }

  .flow__arrow { color: var(--text-dim); font-size: 1.25rem; font-weight: 300; }

  .flow__branch {
    display: flex;
    gap: 0.4rem;

    & .flow__node { padding: 0.6rem 0.8rem; font-size: 0.75rem; }
  }

  .flow__node--skill {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-dim);
  }

  /* --- FAQ --- */
  .faq { padding: 6rem 0; }

  .faq__list {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .faq__item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color 0.2s;
    &:hover, &[open] { border-color: var(--border-hover); }

    & summary {
      padding: 1.25rem 1.5rem;
      font-weight: 600;
      font-family: var(--font-heading);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
      color: var(--text-bright);

      &::after {
        content: '+';
        font-size: 1.25rem;
        color: var(--cyan);
        transition: transform 0.2s;
      }

      &::-webkit-details-marker { display: none; }
    }

    &[open] summary::after { content: '−'; }

    & p {
      padding: 0 1.5rem 1.25rem;
      color: var(--text-dim);
      line-height: 1.7;
      text-wrap: pretty;
    }
  }

  /* --- Sticky CTA --- */
  .sticky-cta {
    position: fixed;
    bottom: -100px;
    left: 0;
    right: 0;
    z-index: 900;
    transition: bottom 0.35s var(--ease);
    pointer-events: none;
  }

  .sticky-cta--visible { bottom: 0; pointer-events: auto; }

  .sticky-cta__inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    background: rgba(6, 6, 16, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border);
  }

  .sticky-cta__cmd {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text);
  }

  .sticky-cta__copy {
    padding: 0.5rem 1rem;
    background: var(--cyan);
    color: var(--bg);
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.8rem;
    transition: background 0.2s;
    &:hover { background: var(--blue); }
  }
} /* close @layer components (continued) */

/* ============================================================
   Scroll-driven animations (progressive enhancement)
   ============================================================ */
@supports (animation-timeline: view()) {
  .reveal {
    animation: scroll-reveal linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 30%;
  }

  @keyframes scroll-reveal {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* Stagger skill cards */
  .skill-card:nth-child(2) { animation-range: entry 2% entry 32%; }
  .skill-card:nth-child(3) { animation-range: entry 4% entry 34%; }
  .skill-card:nth-child(4) { animation-range: entry 6% entry 36%; }

  /* Stagger agent cards */
  .agent-card:nth-child(2) { animation-range: entry 2% entry 32%; }
  .agent-card:nth-child(3) { animation-range: entry 4% entry 34%; }
  .agent-card:nth-child(4) { animation-range: entry 6% entry 36%; }
}

/* ============================================================
   Micro-interaction hover states
   ============================================================ */
@layer components {
  .skill-card:hover .skill-card__number { opacity: 1; color: var(--cyan); }
  .skill-card:hover .skill-card__docs { opacity: 1; color: var(--cyan); }

  .agent-card:hover .agent-card__icon { transform: scale(1.15); transition: transform 0.25s var(--ease); }

  .how__step:hover .how__step-number { transform: scale(1.05); transition: transform 0.25s var(--ease); }

  .flow__node--router:hover { box-shadow: 0 0 24px var(--glow-cyan); }
  .flow__node--agents:hover { box-shadow: 0 0 24px var(--glow-purple); }
  .flow__node--end:hover { box-shadow: 0 0 24px rgba(40, 200, 64, 0.15); }

  .tech-badge { transition: all 0.2s var(--ease), transform 0.2s var(--ease); }
  .tech-badge:hover { transform: translateY(-2px); }

  .platform-tag { transition: all 0.2s var(--ease), transform 0.2s var(--ease); }
  .platform-tag:hover { transform: translateY(-1px); }

  .faq__item summary { transition: color 0.2s var(--ease); }
  .faq__item summary:hover { color: var(--cyan); }
}

/* ============================================================
   Multimedia — SVG illustrations & visualizations
   ============================================================ */

  /* Pipeline illustration */
  .how__illustration { margin: 2rem auto 2.5rem; max-width: 700px; }
  .how__pipeline-svg { width: 100%; height: auto; }
  .pipeline-flow { animation: pipelineFlow 3s linear infinite; }
  @keyframes pipelineFlow { to { stroke-dashoffset: -24; } }
  .pipeline-node { animation: pulseNode 2s ease-in-out infinite; }
  .pipeline-node--2 { animation-delay: 0.5s; }
  .pipeline-node--3 { animation-delay: 1s; }
  .pipeline-node--4 { animation-delay: 1.5s; }
  @keyframes pulseNode { 0%, 100% { opacity: 0.7; } 50% { opacity: 1; } }

  /* Section dividers */
  .section-divider { margin: 0 auto; max-width: var(--container); padding: 0 1.5rem; }
  .section-divider svg { width: 100%; height: 40px; }

  /* Skill radar */
  .skills__radar { text-align: center; margin: 1.5rem auto 2rem; max-width: 220px; }
  .radar-svg { width: 100%; height: auto; }
  .radar-sweep { animation: radarSweep 4s linear infinite; transform-origin: 150px 150px; }
  @keyframes radarSweep { to { transform: rotate(360deg); } }
  .radar-dot { opacity: 0.4; }
  .radar-dot--active { opacity: 1; animation: dotPulse 2s ease-in-out infinite; }
  @keyframes dotPulse { 0%, 100% { r: 4; } 50% { r: 6; } }
  .skills__radar-label { font-size: 0.8rem; color: var(--text-dim); margin-top: 0.75rem; font-family: var(--font-mono); }

  /* Agent tier bars */
  .agents__tiers { display: flex; flex-direction: column; gap: 0.75rem; max-width: 500px; margin: 1.5rem auto 2rem; }
  .tier { display: grid; grid-template-columns: 80px 1fr; grid-template-rows: auto auto; gap: 0.25rem 1rem; align-items: center; }
  .tier__label { font-family: var(--font-mono); font-size: 0.85rem; font-weight: 600; grid-row: 1; }
  .tier__desc { font-size: 0.75rem; color: var(--text-dim); grid-column: 2; grid-row: 1; }
  .tier__bar { grid-column: 1 / -1; grid-row: 2; height: 6px; background: rgba(255,255,255,0.04); border-radius: 3px; overflow: hidden; }
  .tier__fill { height: 100%; border-radius: 3px; transition: width 1s var(--ease); }
  .tier__fill--opus { background: linear-gradient(90deg, #7C3AED, #9F67FF); }
  .tier__fill--sonnet { background: linear-gradient(90deg, #00E5FF, #50AAE3); }
  .tier__fill--haiku { background: linear-gradient(90deg, #28c840, #5fd87a); }
  .tier--opus .tier__label { color: #9F67FF; }
  .tier--sonnet .tier__label { color: var(--cyan); }
  .tier--haiku .tier__label { color: #28c840; }

  /* Context window bar */
  .flow__context-viz { margin: 1.5rem auto 2rem; max-width: 550px; }
  .context-bar-svg { width: 100%; height: auto; }
  .ctx-block { animation: ctxPulse 3s ease-in-out infinite; }
  .ctx-block--2 { animation-delay: 0.75s; }
  .ctx-block--3 { animation-delay: 1.5s; }
  .ctx-block--4 { animation-delay: 2.25s; }
  @keyframes ctxPulse { 0%, 100% { opacity: 0.6; } 50% { opacity: 1; } }

/* ============================================================
   @starting-style entry animations
   ============================================================ */

/* FAQ accordion content — fade+slide in on open */
.faq__item > p {
  opacity: 0;
  transform: translateY(-8px);
}

.faq__item[open] > p {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

@starting-style {
  .faq__item[open] > p {
    opacity: 0;
    transform: translateY(-8px);
  }
}

/* Mobile nav menu — fade+slide in on open */
.nav__links--open {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

@starting-style {
  .nav__links--open {
    opacity: 0;
    transform: translateY(-12px);
  }
}

/* ============================================================
   Responsive
   ============================================================ */

/* 375px — small phones */
@media (max-width: 480px) {
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .hero__install-cmd { flex-direction: column; border-radius: var(--radius); padding: 0.75rem; }
  .hero__copy-btn { width: 100%; border-radius: var(--radius); }
  .hero__btns { flex-direction: column; }
  .how__steps { flex-direction: column; }
  .how__connector { width: auto; min-width: auto; height: 24px; }
  .how__connector::after { transform: rotate(90deg); }
  .compare__grid { grid-template-columns: 1fr; }
  .flow__diagram { flex-direction: column; }
  .flow__arrow { transform: rotate(90deg); }
  .flow__branch { flex-wrap: wrap; justify-content: center; }
  .sticky-cta__cmd { display: none; }
  .footer__grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer__bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
  .newsletter-form { flex-direction: column; }
  .newsletter-form__input { border-right: 1px solid var(--border); border-radius: var(--radius); }
  .newsletter-form__btn { border-radius: var(--radius); }
  .nav__links { display: none; }
  .nav__mobile { display: flex; }
  .nav__links--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(6, 6, 16, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    gap: 1rem;
  }
}

/* 768px — tablets */
@media (max-width: 768px) {
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .how__steps { flex-direction: column; }
  .how__connector { width: auto; min-width: auto; height: 24px; }
  .how__connector::after { transform: rotate(90deg); }
  .compare__grid { grid-template-columns: 1fr; }
  .flow__diagram { flex-direction: column; }
  .flow__arrow { transform: rotate(90deg); }
  .flow__branch { flex-wrap: wrap; justify-content: center; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .nav__links { display: none; }
  .nav__mobile { display: flex; }
  .nav__links--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(6, 6, 16, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    gap: 1rem;
  }
  .install__methods { grid-template-columns: 1fr; }
}

/* 1024px — small desktops */
@media (max-width: 1024px) {
  .footer__grid { grid-template-columns: 1fr 1fr 1fr; }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   Print
   ============================================================ */
@media print {
  .nav, .hero__bg, .hero__scroll, .code-block__copy { display: none; }
  body { background: #fff; color: #000; }
  .text-gradient { -webkit-text-fill-color: #000; }
}