/* ==========================================================================
   NullStack Solutions — Stylesheet
   ========================================================================== */

:root {
  --bg: #101311;
  --surface: #191d19;
  --surface-hover: #222822;
  --text: #f2f4ed;
  --muted: #a3afa3;
  --accent: #c6f582;
  --border: #ffffff19;
  --radius: 22px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}
body.locked { overflow: hidden; }
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
button:focus-visible, a:focus-visible, input:focus-visible,
textarea:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 5px;
}
::selection { background: var(--accent); color: var(--bg); }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -.045em; }
p { color: var(--muted); }
.container { width: min(var(--max), calc(100% - 48px)); margin: auto; }
.section { padding: 100px 0; }
.eyebrow {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 22px; color: var(--accent);
  font-size: 12px; font-weight: 650;
  letter-spacing: .15em; text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; }
.section-title { font-size: clamp(34px, 5vw, 58px); max-width: 650px; }
.section-head {
  display: flex; align-items: end; justify-content: space-between;
  gap: 40px; margin-bottom: 38px;
}
.section-head h2 { margin-bottom: 0; }
.section-head > p { max-width: 340px; margin-bottom: 0; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 24px; min-height: 49px; padding: 12px 22px;
  border: 1px solid transparent; border-radius: 9px;
  background: var(--accent); color: var(--bg);
  font-size: 14px; font-weight: 650; transition: .2s ease;
}
.btn:hover, .btn:focus-visible, .btn:active, .btn:visited {
  color: var(--bg);
  text-decoration: none;
}
.btn:hover { transform: translateY(-3px); background: #d6ffa3; }
.btn.secondary { background: transparent; border-color: var(--border); color: var(--text); }
.btn.secondary:hover { background: var(--surface); }
.btn[disabled] { opacity: .6; cursor: not-allowed; transform: none; }
.arrow { font-size: 20px; line-height: 1; }
.skip-link { position: fixed; top: -100px; left: 20px; z-index: 100; }
.skip-link:focus { top: 16px; }

/* Navigation */
header {
  position: sticky; top: 0; z-index: 30;
  border-bottom: 1px solid var(--border);
  background: #101311ed; backdrop-filter: blur(18px);
}
.nav { min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-icon {
  width: 37px; height: 37px; border-radius: 9px;
  background: var(--accent);
  display: grid; place-items: center;
  padding: 6px;
}
.brand-icon img { width: 100%; height: 100%; display: block; }
.brand-name { font-size: 20px; font-weight: 750; letter-spacing: -.7px; line-height: 1.1; }
.brand-name small { display: block; color: var(--muted); font-size: 9px; letter-spacing: .24em; margin-top: 5px; }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links > a { color: var(--muted); font-size: 13px; }
.nav-links > a:hover, .nav-links > a.active { color: var(--accent); }
.nav-links > .btn {
  color: var(--bg) !important;
  background: var(--accent);
  margin-left: 12px;
}
.nav-links > .btn:hover,
.nav-links > .btn:focus-visible,
.nav-links > .btn:active,
.nav-links > .btn:visited {
  color: var(--bg) !important;
  background: #d6ffa3;
}
.menu-toggle { display: none; color: var(--text); background: transparent; border: 1px solid var(--border); border-radius: 8px; padding: 7px 12px; }

/* Hero */
.hero { padding: 94px 0 55px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.12fr 1fr; align-items: center; gap: 50px; }
.availability {
  display: inline-flex; align-items: center; gap: 9px;
  border: 1px solid var(--border); border-radius: 99px;
  padding: 7px 12px; font-size: 11px; color: #c7d0c5; margin-bottom: 25px;
}
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 13px #c6f58280; }
h1 { font-size: clamp(48px, 6.1vw, 78px); font-weight: 550; margin-bottom: 25px; }
h1 span { color: var(--accent); }
.hero-copy > p { max-width: 460px; font-size: 16px; line-height: 1.8; }
.hero-actions { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.hero-note { font-size: 11px; color: var(--muted); margin-top: 25px; display: flex; flex-wrap: wrap; gap: 20px; }
.hero-note span::before { content: "✓"; color: var(--accent); margin-right: 7px; }

.hero-visual {
  min-height: 460px; position: relative; display: grid; place-items: center;
  background: radial-gradient(ellipse at center, #73984921, transparent 68%);
}
.orbit {
  position: absolute; width: 370px; height: 370px;
  border: 1px solid #c6f58219; border-radius: 50%;
}
.orbit::before { content: ""; position: absolute; inset: 38px; border: 1px dashed #c6f58220; border-radius: 50%; }
.orbit::after { content: ""; position: absolute; inset: -45px; border: 1px solid #c6f5820b; border-radius: 50%; }
.code-window {
  width: 100%; max-width: 420px; z-index: 1;
  border: 1px solid #ffffff24; border-radius: 15px;
  background: #181e19; box-shadow: 0 30px 90px #0007;
  transform: rotate(-3deg);
}
.window-bar { padding: 15px 18px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 6px; }
.window-bar i { width: 7px; height: 7px; background: #566151; border-radius: 50%; }
.window-bar i:first-child { background: #c6f582; }
.window-bar span { margin-left: auto; font: 10px monospace; color: var(--muted); }
.code-content { padding: 26px 22px; font: 12px/2.05 ui-monospace, SFMono-Regular, Consolas, monospace; overflow: auto; }
.code-line { display: block; white-space: pre; }
.line-num { color: #576454; display: inline-block; width: 27px; user-select: none; }
.purple { color: #c8aff3; }
.green { color: var(--accent); }
.blue { color: #94c9e6; }
.comment { color: #768871; }
.window-footer { margin: 0 18px 18px; padding: 9px 12px; background: #c6f5820a; border: 1px solid #c6f58218; color: var(--accent); border-radius: 6px; font: 10px monospace; }
.float-label {
  position: absolute; z-index: 2; padding: 12px 17px;
  background: #232b22; border: 1px solid #ffffff20;
  border-radius: 11px; font-size: 12px; box-shadow: 0 10px 25px #0004;
  animation: float 5s ease-in-out infinite;
}
.float-label.top { top: 38px; right: 0; }
.float-label.bottom { bottom: 32px; left: 0; animation-delay: -2s; }
.float-label b { color: var(--accent); margin-right: 8px; }
@keyframes float { 50% { transform: translateY(-10px); } }

.stack-bar { margin-top: 70px; padding-top: 28px; border-top: 1px solid var(--border); }
.stack-bar > p { text-align: center; font-size: 10px; text-transform: uppercase; letter-spacing: .17em; }
.stack-items { display: flex; flex-wrap: wrap; justify-content: space-around; gap: 20px 30px; padding: 15px 0; color: #c6cdc2; font-size: 19px; font-weight: 650; letter-spacing: -.6px; }
.stack-items span { display: inline-flex; gap: 8px; align-items: center; }
.stack-items b { color: #6f8265; font-family: monospace; }

/* Services */
.services { background: #141814; border-block: 1px solid var(--border); }
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 27px; }
.filter {
  background: transparent; border: 1px solid var(--border);
  border-radius: 99px; padding: 8px 17px; color: var(--muted); font-size: 12px;
}
.filter[aria-pressed="true"] { color: var(--bg); background: var(--accent); border-color: var(--accent); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.service-card { padding: 30px; border: 1px solid var(--border); border-radius: 15px; background: var(--surface); transition: .25s; }
.service-card:hover { transform: translateY(-5px); border-color: #c6f58260; background: var(--surface-hover); }
.service-card[hidden] { display: none; }
.service-icon { width: 45px; height: 45px; display: grid; place-items: center; border-radius: 11px; background: #c6f58210; color: var(--accent); font: 22px monospace; margin-bottom: 27px; }
.service-card h3 { font-size: 21px; letter-spacing: -.6px; }
.service-card p { font-size: 13px; line-height: 1.8; min-height: 70px; }
.tags { display: flex; flex-wrap: wrap; gap: 7px; }
.tags span { font-size: 10px; color: #b7c2b2; padding: 4px 8px; border: 1px solid var(--border); border-radius: 5px; }

/* Work */
.work-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; }
.project { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.project-preview { height: 300px; padding: 38px 35px 0; overflow: hidden; position: relative; }
.preview-dashboard { background: #25342b; }
.preview-store { background: #363428; }
.mock-browser { height: 280px; background: #f5f6f0; color: #232b21; border-radius: 10px 10px 0 0; box-shadow: 0 15px 50px #0004; transition: transform .4s; }
.project:hover .mock-browser { transform: translateY(-7px); }
.mock-bar { padding: 10px 14px; border-bottom: 1px solid #0001; font-size: 9px; display: flex; justify-content: space-between; }
.mock-body { padding: 22px; }
.mock-body h4 { margin: 0 0 5px; font-size: 19px; letter-spacing: -.8px; }
.mock-body p { font-size: 9px; color: #687064; }
.metric-row { display: flex; gap: 9px; margin-top: 15px; }
.metric { flex: 1; background: white; padding: 12px; border-radius: 6px; font-size: 8px; color: #727c6b; }
.metric strong { display: block; color: #253420; font-size: 19px; margin-top: 4px; }
.chart { display: flex; align-items: end; gap: 9px; height: 91px; margin-top: 14px; border-bottom: 1px solid #0002; }
.chart i { flex: 1; background: #86ad6b; border-radius: 3px 3px 0 0; }
.store-layout { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 14px; }
.store-layout h4 { font-family: Georgia, serif; font-size: 29px; font-weight: normal; line-height: 1.05; }
.mock-shop-button { display: inline-block; background: #283b2a; color: white; padding: 7px 12px; font-size: 8px; margin-top: 10px; }
.product-art { height: 165px; background: #e5e9dc; border-radius: 75px 75px 8px 8px; display: grid; place-items: center; }
.bottle { width: 60px; height: 105px; border-radius: 9px 9px 15px 15px; background: linear-gradient(90deg, #768a58, #a7b889 45%, #7c925a); position: relative; box-shadow: 10px 14px 15px #23302030; display: grid; place-items: center; }
.bottle::before { content: ""; position: absolute; top: -14px; left: 14px; width: 32px; height: 16px; background: #333f2d; border-radius: 4px 4px 0 0; }
.bottle span { color: #f5f4df; font-size: 10px; letter-spacing: 2px; }
.project-info { padding: 25px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.project-info h3 { font-size: 22px; margin: 7px 0; }
.project-info p { font-size: 12px; margin-bottom: 0; }
.project-type { font-size: 10px; text-transform: uppercase; letter-spacing: .1em; color: var(--accent); }
.icon-button { flex-shrink: 0; border: 1px solid var(--border); border-radius: 50%; width: 44px; height: 44px; background: transparent; color: var(--text); font-size: 20px; }
.icon-button:hover { background: var(--accent); color: var(--bg); }
.work-disclaimer { font-size: 11px; margin: 20px 0 0; }

/* About and process */
.about { border-block: 1px solid var(--border); background: #141814; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 85px; align-items: start; }
.about-copy p { font-size: 15px; line-height: 1.9; }
.principle { padding: 23px 0; border-bottom: 1px solid var(--border); display: flex; gap: 20px; }
.principle:first-child { padding-top: 0; }
.principle > span { color: var(--accent); font: 12px monospace; padding-top: 3px; }
.principle h3 { font-size: 20px; margin-bottom: 9px; letter-spacing: -.5px; }
.principle p { font-size: 13px; margin: 0; }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; margin-top: 45px; }
.step-number { font: 12px monospace; color: var(--accent); padding-bottom: 20px; border-bottom: 1px solid #c6f58250; margin-bottom: 24px; }
.step h3 { font-size: 21px; letter-spacing: -.5px; }
.step p { font-size: 13px; }

/* FAQ */
.faq-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; }
.faq { padding-top: 0; }
details { border-bottom: 1px solid var(--border); }
summary { list-style: none; cursor: pointer; padding: 23px 0; display: flex; justify-content: space-between; align-items: center; gap: 20px; font-size: 15px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--accent); font-size: 24px; }
details[open] summary::after { content: "−"; }
details p { font-size: 14px; padding-right: 25px; line-height: 1.8; }

/* Contact */
.contact { padding-top: 20px; }
.contact-panel { background: var(--accent); border-radius: 25px; padding: 55px; display: grid; grid-template-columns: 1fr 1fr; gap: 65px; color: var(--bg); }
.contact-panel .eyebrow { color: #40572c; }
.contact-panel h2 { font-size: clamp(38px, 4.5vw, 57px); }
.contact-panel p { color: #405333; font-size: 14px; }
.contact-footnote { margin-top: 34px; font-size: 12px !important; max-width: 290px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 15px; }
label { font-size: 11px; font-weight: 650; }
input, select, textarea { width: 100%; min-width: 0; padding: 12px 13px; background: #ffffff40; border: 1px solid #10131125; border-radius: 7px; color: #192213; font-size: 13px; }
input::placeholder, textarea::placeholder { color: #52663f; }
textarea { resize: vertical; min-height: 100px; }
.contact-panel :focus-visible { outline-color: #26351b; }
.contact-panel .btn { width: 100%; background: var(--bg); color: var(--text); }
.contact-panel .btn:hover { background: #2b3625; }
.form-status { margin: 12px 0 0; font-size: 12px !important; }
.form-status.is-error { color: #7a1f1f !important; font-weight: 650; }
.form-status.is-success { color: #1f3d16 !important; font-weight: 650; }
input[aria-invalid="true"], textarea[aria-invalid="true"], select[aria-invalid="true"] { outline: 2px solid #7a1f1f; outline-offset: 1px; }

footer { border-top: 1px solid var(--border); padding: 38px 0; }
.footer-top { display: flex; justify-content: space-between; align-items: center; gap: 25px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 25px; color: var(--muted); font-size: 12px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--border); font-size: 11px; color: var(--muted); }

/* Dialog and motion */
dialog { width: min(560px, calc(100% - 32px)); border: 1px solid #c6f58240; border-radius: 20px; padding: 35px; background: var(--surface); color: var(--text); }
dialog::backdrop { background: #000b; backdrop-filter: blur(6px); }
.dialog-top { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 24px; }
.dialog-top .eyebrow { margin: 0; }
dialog h2 { font-size: 34px; }
dialog p, dialog li { font-size: 14px; color: var(--muted); }
dialog ul { padding-left: 20px; margin-bottom: 28px; }
dialog li { margin-bottom: 9px; }
.reveal.ready { opacity: 0; transform: translateY(22px); transition: opacity .65s, transform .65s; }
.reveal.ready.visible { opacity: 1; transform: none; }

@media (min-width: 1600px) { .hero { padding-top: 120px; } }
@media (max-width: 1000px) {
  .nav-links { gap: 19px; }
  .hero-grid { gap: 25px; }
  .code-content { font-size: 10px; padding: 20px 14px; }
  .service-card { padding: 24px; }
  .about-grid, .faq-grid { gap: 40px; }
  .contact-panel { padding: 38px; gap: 35px; }
  .project-preview { padding: 30px 20px 0; }
}
@media (max-width: 760px) {
  .container { width: calc(100% - 36px); }
  .section { padding: 65px 0; }
  .nav { min-height: 73px; position: relative; }
  .menu-toggle { display: block; }
  .nav-links {
    position: fixed;
    top: 88px;
    right: 18px;
    left: auto;
    width: min(340px, calc(100vw - 32px));
    padding: 18px 18px 14px;
    background: rgba(25, 29, 25, 0.98);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: 0 30px 45px rgba(0, 0, 0, 0.22);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    opacity: 0;
    pointer-events: none;
    transform: translateX(24px);
    transition: opacity 0.25s ease, transform 0.25s ease;
  }
  .nav-links.open {
    display: flex;
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0);
  }
  .nav-links > a {
    padding: 12px 10px;
    border-radius: 10px;
    font-size: 15px;
  }
  .nav-links > a:hover, .nav-links > a.active { background: rgba(198, 245, 130, 0.08); }
  .nav-links > .btn {
    margin: 14px 0 0;
    width: 100%;
    color: var(--bg) !important;
  }
  .hero { padding: 55px 0 25px; }
  .hero-grid, .about-grid, .faq-grid, .contact-panel { grid-template-columns: 1fr; }
  h1 { max-width: 600px; }
  .hero-copy > p { max-width: 550px; }
  .hero-visual { min-height: 390px; margin-top: 20px; }
  .code-window { max-width: 440px; width: calc(100% - 25px); }
  .code-content { font-size: 12px; }
  .float-label.top { right: 5%; top: 12px; }
  .float-label.bottom { left: 4%; bottom: 7px; }
  .stack-bar { margin-top: 30px; }
  .stack-items { font-size: 16px; }
  .section-head { align-items: start; flex-direction: column; gap: 20px; }
  .section-head > p { max-width: 500px; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .work-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .faq { padding-top: 0; }
  .contact { padding-top: 0; }
  .contact-panel { padding: 30px; gap: 28px; }
  .contact-footnote { margin-top: 18px; max-width: none; }
  .footer-top { align-items: start; flex-direction: column; }
}
@media (max-width: 440px) {
  .service-grid { grid-template-columns: 1fr; }
  .service-card p { min-height: 0; }
  .hero-actions .btn { flex: 1; gap: 10px; padding-inline: 14px; }
  .code-content { font-size: 10px; }
  .hero-visual { min-height: 350px; }
  .orbit { width: 270px; height: 270px; }
  .float-label { font-size: 10px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .contact-panel { padding: 25px 20px; }
  .project-preview { height: 270px; padding-inline: 15px; }
  .mock-body { padding: 16px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal.ready { opacity: 1; transform: none; }
}