/* ==========================================================================
   AHDev Pty (Ltd) — site styles
   ========================================================================== */

:root {
    --ink: #0B1324;
    --navy: #0F1B3D;
    --navy-2: #162552;
    --cyan: #22D3EE;
    --cyan-2: #8FE9F7;
    --cyan-dark: #0E7490;
    --amber: #F59E0B;
    --green: #16A34A;
    --rose: #E11D48;
    --bg: #F6F7FB;
    --bg-alt: #EEF1F8;
    --surface: #FFFFFF;
    --text: #0B1324;
    --muted: #5B6478;
    --line: #E4E7EE;
    --line-2: #CFD6E4;
    --radius: 18px;
    --radius-sm: 12px;
    --shadow: 0 10px 30px rgba(11, 19, 36, 0.08);
    --shadow-lg: 0 24px 60px rgba(11, 19, 36, 0.16);
    --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    --container: 1140px;
    --header-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }
body {
    margin: 0;
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--cyan-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.6em; }
p { margin: 0 0 1em; }
code { font-family: var(--mono); font-size: 0.9em; background: rgba(15, 27, 61, 0.06); padding: 0.1em 0.4em; border-radius: 6px; }
.muted { color: var(--muted); }
.container { width: min(var(--container), calc(100% - 2.5rem)); margin-inline: auto; }

.skip-link {
    position: absolute; left: 1rem; top: -100px;
    background: var(--cyan); color: var(--navy); padding: 0.6rem 1rem; border-radius: 8px; z-index: 100; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

/* Buttons ------------------------------------------------------------------ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    padding: 0.85rem 1.35rem; border-radius: 999px; border: 1px solid transparent;
    font: inherit; font-weight: 600; font-size: 0.95rem; line-height: 1; cursor: pointer;
    transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:focus-visible { outline: 3px solid var(--cyan); outline-offset: 2px; }
.btn-sm { padding: 0.65rem 1.1rem; font-size: 0.88rem; }
.btn-primary { background: var(--cyan); color: var(--navy); }
.btn-primary:hover { background: var(--cyan-2); }
.btn-outline { border-color: rgba(255, 255, 255, 0.35); color: #fff; }
.btn-outline:hover { background: rgba(255, 255, 255, 0.1); }
.btn-dark { background: var(--navy); color: #fff; }
.btn-dark:hover { background: var(--navy-2); box-shadow: var(--shadow); }
.btn[disabled] { opacity: 0.6; cursor: wait; transform: none; }

/* Header ------------------------------------------------------------------- */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(15, 27, 61, 0.92);
    -webkit-backdrop-filter: saturate(160%) blur(12px);
    backdrop-filter: saturate(160%) blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: var(--header-h); }
.brand { display: inline-flex; align-items: center; color: #fff; font-weight: 800; font-size: 1.5rem; letter-spacing: -0.03em; line-height: 1; }
.brand:hover { text-decoration: none; }
.brand em { font-style: normal; color: var(--cyan); }
.brand small { display: block; margin-top: 0.3rem; font-weight: 600; font-size: 0.6rem; letter-spacing: 0.2em; text-transform: uppercase; color: rgba(255, 255, 255, 0.6); }
.nav { display: flex; align-items: center; gap: 1.75rem; }
.nav a:not(.btn) { color: rgba(255, 255, 255, 0.82); font-weight: 500; font-size: 0.95rem; }
.nav a:not(.btn):hover { color: #fff; text-decoration: none; }
.nav-toggle {
    display: none; flex-direction: column; justify-content: center; gap: 5px;
    width: 44px; height: 44px; padding: 0; border: 0; background: transparent; cursor: pointer; border-radius: 10px;
}
.nav-toggle span { display: block; width: 22px; height: 2px; margin: 0 auto; background: #fff; border-radius: 2px; transition: transform 0.2s ease, opacity 0.2s ease; }
.site-header.open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header.open .nav-toggle span:nth-child(2) { opacity: 0; }
.site-header.open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero --------------------------------------------------------------------- */
.hero {
    position: relative; overflow: hidden; isolation: isolate;
    background: var(--navy); color: #fff; padding: 6.5rem 0 5.5rem;
}
.hero::before {
    content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0.35;
    background-image: linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
    background-size: 56px 56px;
    -webkit-mask-image: radial-gradient(ellipse at 30% 20%, #000 20%, transparent 75%);
    mask-image: radial-gradient(ellipse at 30% 20%, #000 20%, transparent 75%);
}
.hero::after {
    content: ""; position: absolute; z-index: -1; right: -10%; top: -30%; width: 640px; height: 640px; border-radius: 50%;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.45), rgba(34, 211, 238, 0) 65%);
    filter: blur(10px);
}
.hero h1 { font-size: clamp(2.5rem, 5.4vw, 4.25rem); letter-spacing: -0.035em; line-height: 1.04; margin: 0 0 1.1rem; max-width: 15ch; }
.hero h1 span { color: var(--cyan); }
.hero .lead { font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: rgba(255, 255, 255, 0.8); max-width: 60ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2rem; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 2.75rem; margin-top: 3.5rem; padding-top: 2rem; border-top: 1px solid rgba(255, 255, 255, 0.12); }
.stat b { display: block; font-size: 2.2rem; font-weight: 800; letter-spacing: -0.04em; line-height: 1; color: #fff; }
.stat span { display: block; margin-top: 0.4rem; font-size: 0.88rem; color: rgba(255, 255, 255, 0.6); }

/* "Sent here" band --------------------------------------------------------- */
.notice { background: var(--surface); border-bottom: 1px solid var(--line); }
.notice .container { display: grid; grid-template-columns: auto 1fr; gap: 1.25rem; align-items: start; padding: 1.75rem 0; }
.notice-icon { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; background: rgba(34, 211, 238, 0.15); color: var(--cyan-dark); }
.notice-title { font-size: 1.15rem; margin: 0.15rem 0 0.35rem; }
.notice p { margin: 0; color: var(--muted); max-width: 90ch; }
.notice strong { color: var(--text); }

/* Sections ----------------------------------------------------------------- */
.section { padding: 5.5rem 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 680px; margin-bottom: 2.5rem; }
.kicker { margin: 0 0 0.5rem; color: var(--cyan-dark); font-weight: 700; font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase; }
.kicker-light { color: var(--cyan); }
.section h2 { font-size: clamp(1.85rem, 3.4vw, 2.6rem); letter-spacing: -0.03em; margin-bottom: 0.75rem; }
.section-head p { margin-bottom: 0; font-size: 1.05rem; }

/* Filters + cards ---------------------------------------------------------- */
.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2rem; }
.filter {
    padding: 0.5rem 1rem; border-radius: 999px; border: 1px solid var(--line-2); background: var(--surface);
    font: inherit; font-weight: 600; font-size: 0.85rem; color: var(--muted); cursor: pointer; transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.filter:hover { border-color: var(--navy); color: var(--navy); }
.filter[aria-pressed="true"] { background: var(--navy); border-color: var(--navy); color: #fff; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.card {
    position: relative; display: flex; flex-direction: column; gap: 0.9rem;
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--line-2); }
.card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; }
.mark {
    width: 54px; height: 54px; border-radius: 15px; display: grid; place-items: center;
    background: var(--brand, var(--navy)); color: #fff; font-weight: 800; font-size: 1.05rem; letter-spacing: -0.02em;
    box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.18);
}
.pill { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.3rem 0.65rem; border-radius: 999px; font-size: 0.74rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; white-space: nowrap; }
.pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.pill-live { background: rgba(22, 163, 74, 0.12); color: #15803D; }
.pill-beta { background: rgba(245, 158, 11, 0.14); color: #B45309; }
.pill-coming-soon { background: rgba(91, 100, 120, 0.12); color: var(--muted); }
.card .tag { margin: 0 0 0.25rem; font-size: 0.74rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.card h3 { margin: 0 0 0.2rem; font-size: 1.25rem; }
.card .tagline { margin: 0; font-weight: 600; color: var(--navy); }
.card .desc { margin: 0; color: var(--muted); font-size: 0.95rem; }
.card-foot { margin-top: auto; padding-top: 0.9rem; border-top: 1px dashed var(--line-2); }
.card-link { font-weight: 600; font-size: 0.92rem; }
.card-link::after { content: ""; position: absolute; inset: 0; border-radius: var(--radius); }
.card-link.is-muted { color: var(--muted); font-weight: 500; }
.card-link.is-muted::after { content: none; }
.empty { margin-top: 1.5rem; }

/* About -------------------------------------------------------------------- */
.about-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 4rem; align-items: start; }
.about-grid p { font-size: 1.05rem; }
.list-title { font-size: 1rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); margin-bottom: 1.25rem; }
.checklist { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
.checklist li { position: relative; padding-left: 2.1rem; }
.checklist li::before {
    content: ""; position: absolute; left: 0; top: 0.2rem; width: 22px; height: 22px; border-radius: 50%;
    background: var(--cyan) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230F1B3D' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 13px no-repeat;
}
.checklist strong { color: var(--navy); }

/* Approach ----------------------------------------------------------------- */
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.trio .card { gap: 0.6rem; }
.trio .icon { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; background: rgba(34, 211, 238, 0.15); color: var(--cyan-dark); margin-bottom: 0.4rem; }
.trio h3 { margin: 0; font-size: 1.2rem; }
.trio p { margin: 0; color: var(--muted); }

/* Contact ------------------------------------------------------------------ */
.contact-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 3rem; align-items: start; }
.form { display: grid; gap: 1rem; margin-top: 1.5rem; }
.form label { display: grid; gap: 0.4rem; font-weight: 600; font-size: 0.9rem; color: var(--navy); }
.form input, .form select, .form textarea {
    width: 100%; padding: 0.8rem 0.95rem; border: 1px solid var(--line-2); border-radius: var(--radius-sm);
    background: var(--surface); color: var(--text); font: inherit; font-size: 1rem; transition: border-color 0.15s, box-shadow 0.15s;
}
.form textarea { resize: vertical; min-height: 140px; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--cyan-dark); box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.25); }
.form .is-invalid { border-color: var(--rose); box-shadow: 0 0 0 4px rgba(225, 29, 72, 0.15); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.form-note { font-size: 0.88rem; }
.hp { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }
.alert { padding: 0.9rem 1.1rem; border-radius: var(--radius-sm); font-weight: 500; border: 1px solid transparent; }
.alert-ok { background: rgba(22, 163, 74, 0.1); border-color: rgba(22, 163, 74, 0.3); color: #166534; }
.alert-error { background: rgba(225, 29, 72, 0.08); border-color: rgba(225, 29, 72, 0.3); color: #9F1239; }
.contact-aside { display: grid; gap: 1.25rem; margin-top: 1.5rem; }
.contact-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem; }
.contact-card h3 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); margin-bottom: 0.8rem; }
.contact-card p { margin-bottom: 0.4rem; font-weight: 500; }
.link-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; font-size: 0.95rem; }
.link-list a { font-weight: 600; color: var(--navy); }
.link-list .muted { font-size: 0.82rem; }

/* Footer ------------------------------------------------------------------- */
.site-footer { background: var(--ink); color: rgba(255, 255, 255, 0.72); padding: 4rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2.5rem; }
.footer-blurb { margin: 1.25rem 0 0; font-size: 0.92rem; max-width: 42ch; }
.site-footer h4 { color: #fff; font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; margin: 0.4rem 0 1rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; font-size: 0.93rem; }
.site-footer a { color: rgba(255, 255, 255, 0.78); }
.site-footer a:hover { color: #fff; }
.footer-divisions { grid-template-columns: 1fr 1fr; column-gap: 1.25rem; }
.footer-social { display: flex !important; gap: 1rem; margin-top: 1rem !important; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem 1.5rem; margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid rgba(255, 255, 255, 0.1); font-size: 0.85rem; color: rgba(255, 255, 255, 0.5); }

/* Sub-pages ---------------------------------------------------------------- */
.page-hero { background: var(--navy); color: #fff; padding: 4.5rem 0 3.5rem; }
.page-hero h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); letter-spacing: -0.03em; max-width: 20ch; }
.page-hero .lead { font-size: 1.15rem; color: rgba(255, 255, 255, 0.78); max-width: 62ch; margin-bottom: 0; }
.page-hero .hero-actions { margin-top: 1.75rem; }
.prose { max-width: 780px; }
.prose h2 { font-size: 1.5rem; margin: 2.5rem 0 0.75rem; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 1.05rem; margin: 1.5rem 0 0.4rem; }
.prose p, .prose li { font-size: 1.02rem; }
.plain-list { padding-left: 1.25rem; margin: 0 0 1em; }
.plain-list li { margin-bottom: 0.3rem; }
.pill-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.6rem; }
.pill-link { display: inline-block; padding: 0.5rem 1rem; border-radius: 999px; background: var(--surface); border: 1px solid var(--line-2); color: var(--navy); font-weight: 600; }
.pill-link:hover { border-color: var(--navy); text-decoration: none; }

/* Brand kit ---------------------------------------------------------------- */
.snippet { display: grid; gap: 0.75rem; margin: 1rem 0 2rem; justify-items: start; }
.snippet-preview { width: 100%; padding: 1.25rem; border: 1px dashed var(--line-2); border-radius: var(--radius-sm); background: var(--surface); }
.snippet-preview p, .ahdev-credit-demo { margin: 0; color: var(--muted); font-size: 0.95rem; }
.ahdev-credit-demo a { color: var(--navy); font-weight: 600; }
.code {
    width: 100%; margin: 0; padding: 1rem 1.2rem; border-radius: var(--radius-sm);
    background: var(--ink); color: #E6EDF3; font-family: var(--mono); font-size: 0.85rem; line-height: 1.5;
    white-space: pre-wrap; word-break: break-all; overflow-x: auto;
}
.logo-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin: 1rem 0 1.5rem; }
.logo-tile {
    display: grid; gap: 0.9rem; justify-items: center; padding: 1.75rem 1.25rem 1.25rem;
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); color: var(--muted); font-size: 0.88rem; font-weight: 600; text-align: center;
}
.logo-tile:hover { text-decoration: none; box-shadow: var(--shadow); }
.logo-tile-dark { background: var(--navy); color: rgba(255, 255, 255, 0.8); }
.swatches { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin: 1rem 0 1.5rem; }
.swatch { display: grid; grid-template-columns: 48px 1fr auto; grid-template-rows: auto auto; column-gap: 0.9rem; align-items: center; padding: 1rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); }
.swatch-chip { grid-row: 1 / span 2; width: 48px; height: 48px; border-radius: 12px; border: 1px solid rgba(0, 0, 0, 0.08); }
.swatch b { color: var(--navy); }
.swatch code { grid-column: 3; grid-row: 1; }
.swatch .muted { grid-column: 2 / span 2; grid-row: 2; font-size: 0.85rem; }

/* Reveal animation --------------------------------------------------------- */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease, transform 0.6s ease; }
.js .reveal.in { opacity: 1; transform: none; }
.card.reveal.in:hover { transform: translateY(-4px); }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .js .reveal { opacity: 1; transform: none; transition: none; }
    .btn, .card { transition: none; }
}

/* Responsive --------------------------------------------------------------- */
@media (max-width: 1000px) {
    .grid, .trio { grid-template-columns: repeat(2, 1fr); }
    .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
    .nav-toggle { display: flex; }
    .nav {
        display: none; position: absolute; left: 0; right: 0; top: var(--header-h);
        flex-direction: column; align-items: stretch; gap: 0.25rem;
        padding: 0.75rem 1.25rem 1.25rem; background: var(--navy); border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        box-shadow: var(--shadow-lg);
    }
    .nav a:not(.btn) { padding: 0.75rem 0.25rem; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
    .nav .btn { margin-top: 0.75rem; }
    .site-header.open .nav { display: flex; }
    .hero { padding: 4.5rem 0 4rem; }
    .hero-stats { gap: 1.75rem; }
    .notice .container { grid-template-columns: 1fr; }
    .section { padding: 4rem 0; }
    .grid, .trio, .logo-grid, .swatches { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
}