@layer reset, tokens, base, components, utilities;

/* ── @layer tokens ── */
@layer tokens {
  :root, [data-theme="dark"] {
    --bg:          #050507;
    --surface:     #0D0D10;
    --surface2:    #141418;
    --border:      #252528;
    --fg:          #FFFFFF;
    --muted:       #8E8E93;
    --accent:      #2563EB;
    --accent-deep: #005288;
    --cyan:        #38BDF8;
    --green:       #22C55E;
    --red:         #EF4444;
    --amber:       #F59E0B;
    --card-bg:     #141416;
    --nav-blur-bg: rgba(11,11,12,.88);
  }

  [data-theme="light"] {
    --bg:          #F8F9FA;
    --surface:     #FFFFFF;
    --surface2:    #F1F3F5;
    --border:      #E0E0E5;
    --fg:          #0A0A0B;
    --muted:       #6E6E73;
    --accent:      #005288;
    --accent-deep: #003D6B;
    --cyan:        #0284C7;
    --green:       #15803D;
    --red:         #DC2626;
    --amber:       #D97706;
    --card-bg:     #FFFFFF;
    --nav-blur-bg: rgba(248,249,250,.92);
  }

  [data-theme="midnight"] {
    --bg:          #040608;
    --surface:     #0A0E14;
    --surface2:    #10161E;
    --border:      #1A2232;
    --fg:          #E8F0FF;
    --muted:       #5A7399;
    --accent:      #00D4FF;
    --accent-deep: #0095B3;
    --cyan:        #00D4FF;
    --green:       #00FF88;
    --red:         #FF3B5C;
    --amber:       #FFB800;
    --card-bg:     #0A0E14;
    --nav-blur-bg: rgba(4,6,8,.92);
  }

  :root {
    --font:       'Space Grotesk', 'Inter', system-ui, sans-serif;
    --mono:       'Geist Mono', 'JetBrains Mono', 'Courier New', monospace;
    --nav-h:      70px;
    --radius:     .3rem;
    --radius-sm:  .2rem;
    --radius-lg:  .5rem;
    --shadow-blue: 0 0 40px rgba(37,99,235,.18);
  }

  :root, [data-theme="dark"], [data-theme="light"], [data-theme="midnight"] {
    --blue:     var(--accent);
    --blue-mid: var(--accent-deep);
    --blue-dk:  rgba(37,99,235,.15);
  }
}

/* ── @layer reset ── */
@layer reset {
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  img, video, canvas { max-width: 100%; display: block; }
}

/* ── @layer base ── */
@layer base {
  body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.72;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
  }

  a { color: var(--accent); text-decoration: none; }
  a:hover { text-decoration: underline; }

  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
    background-size: 72px 72px;
    pointer-events: none;
    z-index: 0;
  }

  body::after {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-deep), var(--accent), var(--cyan), var(--accent));
    background-size: 200% 100%;
    animation: shimmer 4s linear infinite;
    z-index: 1000;
  }

  @keyframes shimmer { from { background-position: 0 0; } to { background-position: 200% 0; } }

  .container { max-width: 1120px; margin: 0 auto; padding: 0 2rem; position: relative; z-index: 1; }

  section[id] { scroll-margin-top: var(--nav-h); }
  section { padding: 6rem 0; }

  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .65s ease, transform .65s ease;
  }
  .reveal.visible { opacity: 1; transform: none; }
  .reveal-group .reveal:nth-child(2) { transition-delay: .1s; }
  .reveal-group .reveal:nth-child(3) { transition-delay: .2s; }
  .reveal-group .reveal:nth-child(4) { transition-delay: .3s; }
  .reveal-group .reveal:nth-child(5) { transition-delay: .4s; }
  .reveal-group .reveal:nth-child(6) { transition-delay: .5s; }

  @keyframes reveal-up {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: none; }
  }

  @supports (animation-timeline: scroll()) {
    .reveal {
      animation: reveal-up linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 30%;
    }
    .reveal.visible { animation: none; opacity: 1; transform: none; }
  }

  @media (prefers-contrast: high) {
    :root { --muted: var(--fg); --border: var(--accent); }
  }

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
      animation-duration: .01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: .01ms !important;
    }
    .reveal { opacity: 1 !important; transform: none !important; }
    [data-anim] { opacity: 1 !important; }
    #particle-canvas { display: none; }
    .vid-scanline { display: none; }
  }
}

/* ── @layer components ── */
@layer components {
  /* ── section labels ── */
  .section-label {
    display: inline-block;
    font-size: .68rem;
    font-weight: 600;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--accent);
    background: transparent;
    border: none;
    padding: 0;
    border-radius: 0;
    margin-bottom: 1.2rem;
  }
  .section-label::before {
    content: '— ';
    opacity: .7;
  }
  .section-h2 {
    font-size: clamp(2rem, 4.5vw, 3.4rem);
    font-weight: 800;
    letter-spacing: -.05em;
    margin-bottom: 1rem;
  }
  .section-sub {
    color: var(--muted);
    max-width: 520px;
    margin-bottom: 3.5rem;
    font-size: 1.05rem;
  }

  /* ── buttons ── */
  .btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .7rem 1.5rem;
    border-radius: var(--radius);
    font-family: var(--font);
    font-size: .95rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform .2s, box-shadow .2s, background .2s, border-color .2s;
    border: 1px solid transparent;
    text-decoration: none;
  }
  .btn:hover { text-decoration: none; }

  @keyframes glow {
    0%,100% { opacity: .9; }
    50%      { opacity: 1; }
  }

  .btn-primary { background: var(--accent); color: #fff; animation: glow 3s ease-in-out infinite; }
  .btn-primary:hover { background: var(--accent-deep); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(37,99,235,.35); }
  @media (prefers-reduced-motion: reduce) { .btn-primary { animation: none; } }

  .btn-ghost { background: rgba(255,255,255,.05); color: var(--fg); border-color: var(--border); }
  .btn-ghost:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.2); transform: translateY(-2px); }

  .btn-outline { background: transparent; color: var(--accent); border-color: rgba(37,99,235,.4); }
  .btn-outline:hover { background: rgba(37,99,235,.08); border-color: var(--accent); transform: translateY(-2px); }

  /* ── nav ── */
  nav {
    position: fixed;
    top: 3px; left: 0; right: 0;
    z-index: 300;
    height: var(--nav-h);
    transition: background .35s, box-shadow .35s;
    display: flex;
    align-items: center;
    background: var(--nav-blur-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }
  nav.scrolled {
    box-shadow: 0 1px 0 var(--border);
  }
  nav .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }
  .nav-brand { font-size: 1.15rem; font-weight: 800; color: var(--fg); letter-spacing: -.03em; text-decoration: none; }
  .nav-brand span { color: var(--accent); }
  .nav-links { display: flex; align-items: center; gap: 2rem; }
  .nav-links a { color: var(--muted); font-size: .9rem; font-weight: 500; transition: color .2s; }
  .nav-links a:hover { color: var(--fg); text-decoration: none; }
  .nav-cta { background: var(--accent) !important; color: #fff !important; padding: .45rem 1.1rem !important; border-radius: var(--radius) !important; font-weight: 600 !important; font-size: .88rem !important; transition: background .2s, transform .2s !important; }
  .nav-cta:hover { background: var(--accent-deep) !important; transform: translateY(-1px) !important; }
  .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: .5rem; background: none; border: none; }
  .hamburger span { display: block; width: 22px; height: 2px; background: var(--fg); border-radius: 2px; transition: transform .2s, opacity .2s; }
  .hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .hamburger.open span:nth-child(2) { opacity: 0; }
  .hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(11,11,12,.98);
    z-index: 250;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    opacity: 0;
    transition: opacity .25s;
  }
  .mobile-menu.open { display: flex; opacity: 1; }
  .mobile-menu a { font-size: 1.8rem; font-weight: 700; color: var(--fg); letter-spacing: -.03em; }
  .mobile-menu a:hover { color: var(--accent); text-decoration: none; }

  /* ── theme toggle ── */
  .theme-btn {
    background: none; border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--muted); cursor: pointer; font-size: 1rem; padding: .28rem .52rem;
    line-height: 1; transition: border-color .2s, color .2s; margin-left: .4rem;
  }
  .theme-btn:hover { border-color: var(--accent); color: var(--accent); }

  /* ── hero ── */
  #hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    color: #f1f5ff;
  }
  .hero-bg { position: absolute; inset: 0; z-index: 0; }
  #particle-canvas {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    pointer-events: none;
  }
  .hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(11,11,12,.88) 0%, rgba(13,25,80,.62) 50%, rgba(11,11,12,.9) 100%);
    background-size: 200% 200%;
    animation: gradShift 12s ease infinite;
  }
  [data-theme="light"] .hero-overlay {
    background: linear-gradient(135deg, rgba(248,249,250,.86) 0%, rgba(0,82,136,.32) 50%, rgba(248,249,250,.9) 100%);
    background-size: 200% 200%;
  }
  [data-theme="light"] #hero { color: #0B1426; }
  [data-theme="light"] #hero h1 { color: #0B1426; }
  [data-theme="light"] .hero-sub { color: #334155; }
  [data-theme="midnight"] .hero-overlay {
    background: linear-gradient(135deg, rgba(4,6,8,.9) 0%, rgba(0,200,255,.14) 50%, rgba(4,6,8,.92) 100%);
    background-size: 200% 200%;
  }
  @keyframes gradShift {
    0%, 100% { background-position: 0% 50%; }
    50%       { background-position: 100% 50%; }
  }
  .hero-grain {
    position: absolute; inset: 0; pointer-events: none; z-index: 2;
    opacity: .04;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat; background-size: 192px 192px;
  }
  @media (prefers-reduced-motion: no-preference) {
    .hero-grain { animation: grain 8s steps(10) infinite; }
  }
  @keyframes grain {
    0%,100% { transform: translate(0,0); }
    10% { transform: translate(-2%,-3%); }
    20% { transform: translate(3%,2%); }
    30% { transform: translate(-1%,4%); }
    40% { transform: translate(4%,-1%); }
    50% { transform: translate(-3%,1%); }
    60% { transform: translate(2%,3%); }
    70% { transform: translate(-4%,-2%); }
    80% { transform: translate(1%,-4%); }
    90% { transform: translate(-2%,2%); }
  }
  .hero-body {
    position: relative; z-index: 2;
    flex: 1;
    display: grid;
    grid-template-columns: 55fr 45fr;
    align-items: center;
    gap: 3rem;
    padding-top: calc(var(--nav-h) + 4rem);
    padding-bottom: 3rem;
  }
  .hero-left { display: flex; flex-direction: column; }
  .hero-right {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }

  /* ── video frame ── */
  .video-frame {
    position: relative;
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 8px 32px 0 rgba(0,0,0,0.37), inset 0 0 0 1px rgba(255,255,255,0.1);
    background-color: rgba(4,8,16,0.6);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    aspect-ratio: 16/9;
    animation: borderPulse 3s ease-in-out infinite;
  }
  @keyframes borderPulse {
    0%,100% { opacity: .85; }
    50%      { opacity: 1; }
  }
  #hero-reel {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    opacity: 1;
    filter: none;
  }
  .vid-corner {
    position: absolute;
    font-size: .6rem;
    font-family: var(--mono);
    letter-spacing: 2px;
    font-weight: bold;
    text-transform: uppercase;
    color: #fff;
    z-index: 3;
    padding: .4rem .6rem;
  }
  .vid-corner-tl {
    top: .6rem; left: .7rem;
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
  }
  .vid-corner-tr {
    top: .6rem; right: .7rem;
  }
  .vid-scanline { display: none; }

  /* ── hero content ── */
  #hero h1 { transition: opacity .35s ease, transform .35s ease; }

  #hero h1 .grad {
    background: linear-gradient(90deg, var(--accent) 0%, var(--cyan) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-size: .8rem;
    font-weight: 500;
    color: var(--cyan);
    background: rgba(34,211,238,.08);
    border: 1px solid rgba(34,211,238,.22);
    padding: .35rem .9rem;
    border-radius: 2rem;
    margin-bottom: 1.8rem;
    width: fit-content;
  }
  .hero-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 0 0 rgba(34,197,94,.5);
    animation: pulse-dot 2s ease-in-out infinite;
    flex-shrink: 0;
  }
  @keyframes pulse-dot {
    0%, 100% { box-shadow: 0 0 0 0 rgba(34,197,94,.5); }
    50%       { box-shadow: 0 0 0 6px rgba(34,197,94,0); }
  }
  #hero h1 {
    font-size: clamp(3.4rem, 8vw, 7.2rem);
    font-weight: 800;
    line-height: 1.0;
    letter-spacing: -.07em;
    margin-bottom: 1.5rem;
    max-width: 800px;
    color: #f1f5ff;
  }
  .hero-sub {
    font-size: 1.12rem;
    color: #94a3b8;
    max-width: 580px;
    margin-bottom: 2.5rem;
    font-weight: 400;
    line-height: 1.72;
  }
  .cta-row { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; margin-bottom: 3rem; }
  .scroll-indicator {
    position: relative; z-index: 2;
    color: rgba(148,163,184,.6);
    font-size: .78rem;
    letter-spacing: .12em;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: .5rem;
    animation: fadeUpLoop 2.4s ease-in-out infinite;
  }
  .scroll-indicator::before { content: ''; display: block; width: 1px; height: 24px; background: rgba(148,163,184,.3); }
  @keyframes fadeUpLoop {
    0%, 100% { opacity: .5; transform: translateY(0); }
    50%       { opacity: 1; transform: translateY(5px); }
  }
  .stats-bar {
    position: relative; z-index: 2;
    background: rgba(9,13,26,.82);
    backdrop-filter: blur(12px);
    border-top: 1px solid rgba(30,45,69,.8);
    padding: 1.5rem 0;
  }
  .stats-bar .container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 1.5rem;
  }
  .stat-item { text-align: center; }
  .stat-n {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    color: #f1f5ff;
    letter-spacing: -.04em;
    font-variant-numeric: tabular-nums;
  }
  .stat-l {
    font-size: .7rem;
    color: #94a3b8;
    font-weight: 500;
    letter-spacing: .06em;
    text-transform: uppercase;
  }

  /* ── tech stack strip ── */
  #stack {
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 1.2rem 0;
    overflow: hidden;
  }
  .stack-track { overflow: hidden; position: relative; }
  .stack-track::before,
  .stack-track::after {
    content: '';
    position: absolute;
    top: 0; bottom: 0;
    width: 80px;
    z-index: 2;
  }
  .stack-track::before { left: 0; background: linear-gradient(to right, var(--surface), transparent); }
  .stack-track::after  { right: 0; background: linear-gradient(to left, var(--surface), transparent); }
  .stack-inner {
    display: flex;
    align-items: center;
    gap: 0;
    width: max-content;
    animation: marquee 28s linear infinite;
  }
  @keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
  .stack-tag {
    padding: .3rem 1.4rem;
    font-size: .8rem;
    font-weight: 500;
    color: var(--muted);
    letter-spacing: .02em;
    border-right: 1px solid var(--border);
    white-space: nowrap;
  }

  /* ── services ── */
  #services { background: var(--surface); }
  .svc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1px;
    background: var(--border);
    border: 1.5px solid var(--border);
    border-radius: 0;
    overflow: hidden;
  }
  .svc-card {
    background: var(--surface);
    padding: 2rem;
    transition: transform .25s, box-shadow .25s, background .25s;
    cursor: default;
    position: relative;
  }
  .svc-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
    opacity: 0;
    transition: opacity .25s;
  }
  .svc-card:hover { background: var(--surface2); transform: translateY(-3px); box-shadow: var(--shadow-blue); z-index: 1; }
  .svc-card:hover::before { opacity: 1; }
  .svc-icon {
    width: 44px; height: 44px;
    background: rgba(37,99,235,.1);
    border: 1px solid rgba(37,99,235,.2);
    border-radius: .6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
    color: var(--accent);
    transition: background .25s, transform .25s;
  }
  .svc-card:hover .svc-icon { background: rgba(37,99,235,.18); transform: scale(1.08); }
  .svc-icon svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
  .svc-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--fg); margin-bottom: .6rem; }
  .svc-card p { font-size: .88rem; color: var(--muted); line-height: 1.65; }
  .svc-grid .svc-card:nth-child(1) { --i: 0; }
  .svc-grid .svc-card:nth-child(2) { --i: 1; }
  .svc-grid .svc-card:nth-child(3) { --i: 2; }
  .svc-grid .svc-card:nth-child(4) { --i: 3; }
  .svc-grid .svc-card:nth-child(5) { --i: 4; }
  .svc-grid .svc-card:nth-child(6) { --i: 5; }
  .svc-grid .svc-card.reveal { transition-delay: calc(var(--i,0) * 80ms) !important; }
  @keyframes dockBounce {
    0%   { transform: translateY(0) scale(1); }
    40%  { transform: translateY(-7px) scale(1.02); }
    60%  { transform: translateY(-3px) scale(1.01); }
    80%  { transform: translateY(-6px) scale(1.015); }
    100% { transform: translateY(-3px) scale(1); }
  }
  @media (hover: hover) and (prefers-reduced-motion: no-preference) {
    .svc-card:hover {
      transform: none;
      animation: dockBounce .5s cubic-bezier(.22,1,.36,1) forwards;
    }
  }
  .svc-card {
    background: var(--bg);
    border: none;
    border-radius: 0;
  }

  /* ── process ── */
  #process { background: var(--bg); }
  .process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    counter-reset: step;
  }
  .process-step {
    counter-increment: step;
    position: relative;
    padding-top: 1rem;
  }
  .process-step::before {
    content: '0' counter(step);
    display: block;
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -.06em;
    color: rgba(37,99,235,.15);
    line-height: 1;
    margin-bottom: 1rem;
    font-variant-numeric: tabular-nums;
  }
  .process-step::after {
    content: '';
    position: absolute;
    top: 2.2rem; right: -1rem;
    width: 2rem; height: 1px;
    background: linear-gradient(to right, var(--border), transparent);
  }
  .process-step:last-child::after { display: none; }
  .process-step h3 { font-size: 1rem; font-weight: 700; color: var(--fg); margin-bottom: .6rem; }
  .process-step p { font-size: .88rem; color: var(--muted); line-height: 1.65; }

  /* ── portfolio / bento grid ── */
  #portfolio { background: var(--surface); }
  .proj-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }
  .proj-card {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--card-bg);
    display: flex;
    flex-direction: column;
    transition: transform .3s, border-color .3s;
  }
  .proj-card:hover { transform: translateY(-4px); border-color: var(--accent); }

  /* ── card hover: shimmer sweep + accent glow ── */
  .card-glow {
    position: relative;
    overflow: hidden;
  }
  .card-glow::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 55%;
    height: 100%;
    background: linear-gradient(
      105deg,
      transparent 0%,
      rgba(255,255,255,.04) 40%,
      rgba(255,255,255,.07) 50%,
      rgba(255,255,255,.04) 60%,
      transparent 100%
    );
    transform: skewX(-18deg);
    transition: left .65s cubic-bezier(.4,0,.2,1);
    pointer-events: none;
    z-index: 2;
  }
  .card-glow:hover::before { left: 160%; }
  .card-glow:hover {
    border-color: rgba(37,99,235,.5) !important;
    box-shadow: 0 0 0 1px rgba(37,99,235,.18), 0 12px 40px rgba(37,99,235,.12);
  }

  /* ── project image / overlay / telemetry ── */
  .proj-img { height: 160px; background-size: cover; background-position: center; position: relative; flex-shrink: 0; transition: transform .4s; }
  .proj-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 30%, rgba(0,0,0,.6) 100%); }
  .proj-card:hover .proj-img { transform: scale(1.03); }
  .proj-proto-tags { display: flex; gap: .35rem; flex-wrap: wrap; }
  .proj-proto-tags span { font-family: var(--mono); font-size: .56rem; letter-spacing: .1em; color: rgba(255,255,255,.5); border: 1px solid rgba(255,255,255,.15); border-radius: var(--radius-sm); padding: .1rem .38rem; }
  .telem-panel { font-family: var(--mono); font-size: .7rem; border-top: 1px solid var(--border); margin-top: .8rem; }
  .telem-row { display: flex; justify-content: space-between; padding: .28rem 0; border-bottom: 1px solid var(--border); }
  .telem-k { color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
  .telem-v { color: var(--cyan); letter-spacing: .04em; font-weight: 600; }

  /* ── project card body ── */
  .proj-body { flex: 1; padding: 1.75rem; display: flex; flex-direction: column; }
  .proj-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: .7rem; flex-wrap: wrap; }
  .proj-card h3 { font-size: 1.12rem; font-weight: 700; color: var(--fg); }
  .proj-badge {
    font-size: .7rem; font-weight: 600;
    padding: .2rem .6rem;
    border-radius: 2rem;
    white-space: nowrap;
    background: rgba(34,197,94,.12);
    color: #4ade80;
    border: 1px solid rgba(34,197,94,.25);
  }
  .proj-desc { color: var(--muted); font-size: .9rem; line-height: 1.65; margin-bottom: 1.2rem; flex: 1; }
  .proj-tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1.2rem; }
  .tag {
    font-size: .72rem; font-weight: 500;
    color: var(--muted);
    background: rgba(255,255,255,.04);
    border: 1px solid var(--border);
    padding: .18rem .6rem;
    border-radius: .3rem;
    font-family: var(--mono);
  }
  .proj-metrics {
    display: flex; gap: 1.4rem; flex-wrap: wrap;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
  }
  .metric { font-size: .78rem; font-family: var(--mono); }
  .metric-n { color: var(--accent); font-weight: 700; }
  .metric-l { color: var(--muted); }
  .proj-link {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-size: .83rem;
    font-weight: 600;
    color: var(--accent);
    margin-top: 1rem;
    transition: color .2s;
  }
  .proj-link:hover { color: var(--cyan); text-decoration: none; }

  /* ── impact ── */
  #impact {
    background: linear-gradient(135deg, #071228 0%, #0d1a4a 50%, #071228 100%);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }
  .impact-header { text-align: center; margin-bottom: 4rem; }
  .impact-header h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 800; letter-spacing: -.04em; margin-bottom: .8rem; color: #f1f5ff; }
  .impact-header p { color: #94a3b8; font-size: 1.05rem; }
  .impact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
  }
  .impact-n {
    display: block;
    font-size: clamp(4.5rem, 10vw, 8.5rem);
    font-weight: 800;
    letter-spacing: -.07em;
    color: #f1f5ff;
    line-height: 1;
    margin-bottom: .5rem;
    font-variant-numeric: tabular-nums;
  }
  .impact-label { font-size: .85rem; color: #94a3b8; font-weight: 500; }

  /* ── pricing ── */
  #pricing { background: var(--bg); }
  .zar-note {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    font-size: .78rem;
    color: var(--muted);
    background: rgba(37,99,235,.07);
    border: 1px solid rgba(37,99,235,.15);
    padding: .3rem .8rem;
    border-radius: 2rem;
    margin-bottom: 2rem;
  }
  .pricing-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 3rem;
  }
  table { width: 100%; border-collapse: collapse; font-size: .9rem; }
  th {
    text-align: left;
    color: var(--muted);
    padding: .9rem 1.2rem;
    border-bottom: 1px solid var(--border);
    font-weight: 500;
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    background: rgba(255,255,255,.02);
    white-space: nowrap;
  }
  td { padding: .8rem 1.2rem; border-bottom: 1px solid var(--border); color: var(--muted); }
  tr:last-child td { border-bottom: none; }
  td:first-child { color: var(--fg); font-weight: 500; }
  td:nth-child(2) { color: var(--accent); font-family: var(--mono); font-weight: 600; }
  tr:hover td { background: rgba(255,255,255,.02); }
  .payment-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
  }
  .payment-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: border-color .25s, transform .25s, box-shadow .25s;
  }
  .payment-card:hover { border-color: rgba(37,99,235,.4); transform: translateY(-4px); box-shadow: var(--shadow-blue); }
  .payment-card.featured {
    border-color: rgba(37,99,235,.5);
    background: linear-gradient(135deg, rgba(37,99,235,.08) 0%, var(--surface) 100%);
  }
  .price-tag {
    font-size: 2.8rem; font-weight: 800; color: var(--fg);
    letter-spacing: -.05em; display: block; margin-bottom: .3rem;
  }
  .price-tag sup { font-size: 1.3rem; vertical-align: super; font-weight: 700; color: var(--accent); }
  .payment-desc { color: var(--muted); font-size: .85rem; margin-bottom: 1.5rem; flex: 1; line-height: 1.55; }
  .btn-stripe-inactive {
    width: 100%;
    justify-content: center;
    opacity: .5;
    cursor: not-allowed;
    pointer-events: none;
  }
  .pricing-note { color: var(--muted); font-size: .8rem; line-height: 1.6; }

  /* ── faq ── */
  #faq { background: var(--surface); }
  .faq-list { display: flex; flex-direction: column; gap: .8rem; }
  details.faq-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color .2s;
  }
  details.faq-item[open] { border-color: rgba(37,99,235,.3); }
  details.faq-item summary {
    cursor: pointer;
    list-style: none;
    padding: 1.2rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--fg);
    font-size: .95rem;
    user-select: none;
  }
  details.faq-item summary::-webkit-details-marker { display: none; }
  details.faq-item summary::after {
    content: '+';
    font-size: 1.3rem;
    font-weight: 300;
    color: var(--accent);
    flex-shrink: 0;
    margin-left: 1rem;
    transition: transform .2s;
  }
  details.faq-item[open] summary::after { content: '−'; }
  details.faq-item .faq-body { padding: 0 1.5rem 1.4rem; color: var(--muted); font-size: .92rem; line-height: 1.72; }
  details.faq-item .faq-body a { color: var(--accent); }

  /* ── contact ── */
  #contact {
    background: linear-gradient(135deg, #071228 0%, #0f2060 50%, #071228 100%);
    background-size: 200% 200%;
    animation: gradShift 14s ease infinite;
    border-top: 1px solid var(--border);
  }
  #contact h2 { color: #f1f5ff; }
  #contact .section-sub { color: #94a3b8; max-width: 600px; }
  .contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2.5rem;
  }
  .contact-item {
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius);
    padding: 1.2rem 1.4rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: background .2s, border-color .2s;
  }
  .contact-item:hover { background: rgba(255,255,255,.07); border-color: rgba(37,99,235,.3); }
  .contact-icon {
    width: 40px; height: 40px;
    background: rgba(37,99,235,.15);
    border: 1px solid rgba(37,99,235,.2);
    border-radius: .4rem;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; color: var(--accent);
  }
  .contact-icon svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
  .contact-label { font-size: .7rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: #94a3b8; margin-bottom: .2rem; }
  .contact-value { font-size: .95rem; color: #f1f5ff; font-weight: 500; }
  .contact-value a { color: var(--cyan); text-decoration: none; }
  .contact-value a:hover { text-decoration: underline; }
  .contact-cta-row { display: flex; gap: 1rem; flex-wrap: wrap; }

  /* ── footer ── */
  footer {
    background: var(--bg);
    border-top: 1px solid var(--border);
    padding: 3rem 0 2rem;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2.5rem;
  }
  .footer-brand { font-size: 1.15rem; font-weight: 800; color: var(--fg); letter-spacing: -.03em; margin-bottom: .8rem; }
  .footer-brand span { color: var(--accent); }
  .footer-about { color: var(--muted); font-size: .85rem; line-height: 1.65; max-width: 280px; }
  .footer-col h4 { font-size: .75rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 1rem; }
  .footer-links { display: flex; flex-direction: column; gap: .5rem; }
  .footer-links a { color: var(--muted); font-size: .85rem; transition: color .2s; }
  .footer-links a:hover { color: var(--fg); text-decoration: none; }
  .footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
  }
  .footer-copy { color: var(--muted); font-size: .8rem; }
  .footer-legal { display: flex; gap: 1.5rem; }
  .footer-legal a { color: var(--muted); font-size: .8rem; transition: color .2s; }
  .footer-legal a:hover { color: var(--fg); text-decoration: none; }

  /* ── back to top ── */
  #back-top {
    position: fixed;
    bottom: 2rem; right: 2rem;
    width: 44px; height: 44px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity .25s, transform .25s, background .2s;
    z-index: 200;
    box-shadow: 0 4px 16px rgba(37,99,235,.4);
  }
  #back-top.visible { opacity: 1; transform: none; }
  #back-top:hover { background: var(--accent-deep); transform: translateY(-2px); }

  /* ── lucide icons ── */
  [data-lucide] { width: 18px; height: 18px; stroke-width: 1.5; }
}

/* ── @layer utilities ── */
@layer utilities {
  .accent { color: var(--accent); }
  .muted  { color: var(--muted); }
  .mono   { font-family: var(--mono); }
  .sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }

  @media (max-width: 1100px) {
    .hero-body { grid-template-columns: 1fr; gap: 2.5rem; }
    .hero-right { width: 100%; max-width: 540px; margin: 0 auto; }
  }
  @media (max-width: 960px) {
    .proj-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .impact-grid  { grid-template-columns: repeat(2, 1fr); gap: 3rem; }
    .process-grid { grid-template-columns: repeat(2, 1fr); }
    .process-step::after { display: none; }
    .payment-grid { grid-template-columns: 1fr; }
    .footer-grid  { grid-template-columns: 1fr 1fr; gap: 2rem; }
    .footer-grid > div:first-child { grid-column: 1 / -1; }
  }
  @media (max-width: 700px) {
    .nav-links { display: none; }
    .hamburger { display: flex; }
    #hero h1 { font-size: clamp(2.4rem, 9vw, 3.4rem); }
    .cta-row { flex-direction: column; align-items: flex-start; }
    .proj-grid { grid-template-columns: 1fr; }
    .process-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid  { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
  }
  @media (max-width: 600px) {
    .hero-right { display: none; }
  }
  @media (max-width: 480px) {
    .impact-grid { grid-template-columns: 1fr 1fr; }
    .svc-grid { grid-template-columns: 1fr; }
    .stats-bar .container { gap: 2rem; }
  }
  @supports not (animation-timeline: scroll()) {
    /* Fallback: rely on IntersectionObserver class toggle */
  }
}