:root {
    --ink: #101828;
    --muted: #5e6c84;
    --line: #d8e0ee;
    --paper: #ffffff;
    --wash: #f5f8fd;
    --blue: #2864e8;
    --blue-dark: #174ab8;
    --blue-soft: #eaf1ff;
    --green: #188765;
    --shadow: 0 24px 70px rgba(33, 61, 115, 0.13);
    --radius: 1.25rem;
    color: var(--ink);
    font-family: Inter, "Segoe UI", Arial, sans-serif;
    font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); line-height: 1.55; }
a { color: inherit; }
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img, svg { display: block; max-width: 100%; }

.skip-link {
    position: fixed;
    top: .75rem;
    left: .75rem;
    z-index: 100;
    transform: translateY(-180%);
    padding: .65rem 1rem;
    border-radius: .5rem;
    color: #fff;
    background: #101828;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    border-bottom: 1px solid rgba(216, 224, 238, .88);
    background: rgba(255,255,255,.93);
    backdrop-filter: blur(16px);
}
.nav-shell,
.section-shell,
.footer-shell {
    width: min(1180px, calc(100% - 2rem));
    margin-inline: auto;
}
.nav-shell {
    display: flex;
    min-height: 4.4rem;
    align-items: center;
    gap: 1.5rem;
}
.logo-lockup {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    gap: .7rem;
    color: var(--ink);
    font-size: 1.18rem;
    font-weight: 800;
    letter-spacing: -.025em;
    text-decoration: none;
}
.logo-copy {
    display: grid;
    gap: .12rem;
    line-height: 1;
}
.logo-byline {
    color: var(--muted);
    font-size: .62rem;
    font-style: italic;
    font-weight: 500;
    letter-spacing: 0;
}
.logo-mark {
    display: grid;
    width: 2.35rem;
    height: 2.35rem;
    place-items: center;
    border-radius: .66rem;
    color: #fff;
    background: linear-gradient(145deg, #3777ef, #1956d6);
    box-shadow: 0 7px 18px rgba(40, 100, 232, .23);
    font-size: .93rem;
    letter-spacing: -.04em;
}
.main-nav {
    display: flex;
    margin-left: auto;
    align-items: center;
    gap: .25rem;
}
.main-nav a {
    padding: .58rem .75rem;
    border-radius: .55rem;
    color: #3e4b63;
    font-size: .91rem;
    font-weight: 650;
    text-decoration: none;
}
.main-nav a:hover,
.main-nav a:focus-visible { color: var(--blue); background: var(--blue-soft); outline: none; }
.main-nav .nav-cta { margin-left: .35rem; color: #fff; background: var(--blue); }
.main-nav .nav-cta:hover,
.main-nav .nav-cta:focus-visible { color: #fff; background: var(--blue-dark); }
.menu-button {
    display: none;
    margin-left: auto;
    padding: .5rem .7rem;
    border: 1px solid var(--line);
    border-radius: .55rem;
    color: var(--ink);
    background: var(--paper);
    font-weight: 700;
}

.eyebrow {
    margin: 0 0 .75rem;
    color: var(--blue);
    font-size: .76rem;
    font-weight: 850;
    letter-spacing: .12em;
    text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { letter-spacing: -.035em; line-height: 1.08; }
h1 { max-width: 13ch; margin-bottom: 1.15rem; font-size: clamp(2.55rem, 5.8vw, 5.15rem); }
h2 { margin-bottom: 1rem; font-size: clamp(2rem, 4vw, 3.35rem); }
h3 { margin-bottom: .65rem; font-size: 1.18rem; }
.lede { max-width: 42rem; color: var(--muted); font-size: clamp(1.04rem, 1.7vw, 1.25rem); }
.button-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.65rem; }
.button {
    display: inline-flex;
    min-height: 2.9rem;
    align-items: center;
    justify-content: center;
    padding: .75rem 1.05rem;
    border: 1px solid transparent;
    border-radius: .68rem;
    color: #fff;
    background: var(--blue);
    font-weight: 760;
    text-decoration: none;
    box-shadow: 0 8px 22px rgba(40, 100, 232, .17);
}
.button:hover, .button:focus-visible { background: var(--blue-dark); outline: 3px solid rgba(40,100,232,.2); outline-offset: 2px; }
.button.secondary { border-color: var(--line); color: var(--ink); background: transparent; box-shadow: none; }
.button.secondary:hover, .button.secondary:focus-visible { color: var(--blue); border-color: #a9c0ef; background: var(--blue-soft); }
.microcopy { margin-top: .85rem; color: var(--muted); font-size: .82rem; }

.hero { overflow: hidden; }
.hero .section-shell { display: grid; min-height: 41rem; grid-template-columns: .94fr 1.06fr; align-items: center; gap: clamp(2rem, 6vw, 6rem); padding-block: clamp(4.25rem, 8vw, 7.5rem); }
.hero-copy { position: relative; z-index: 2; }

.product-window {
    overflow: hidden;
    border: 1px solid #ccd8eb;
    border-radius: 1rem;
    background: #f8faff;
    box-shadow: var(--shadow);
}
.product-bar {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: .85rem;
    padding: .75rem;
    border-bottom: 1px solid #d9e2f0;
    background: #fff;
}
.product-mark { display: grid; width: 2rem; height: 2rem; place-items: center; border-radius: .5rem; color: #fff; background: #2864e8; font-size: .75rem; font-weight: 850; }
.product-identity { min-width: 0; }
.product-identity strong, .product-identity span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.product-identity strong { font-size: .78rem; }
.product-identity span { color: #68768d; font-size: .62rem; }
.product-search { padding: .48rem .72rem; border: 1px solid #b9cbed; border-radius: 999px; color: #718096; background: #f8faff; font-size: .67rem; }
.directory-mini { padding: .8rem; }
.mini-company { margin-bottom: .55rem; overflow: hidden; border: 1px solid #d9e2f0; border-radius: .62rem; background: #fff; }
.mini-company-head, .mini-location, .mini-contact { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: .75rem; padding: .68rem .75rem; }
.mini-company-head strong { font-size: .76rem; }
.mini-company-head span, .mini-location span, .mini-contact span { color: #708096; font-size: .59rem; }
.mini-location { margin-inline: .6rem; padding-inline: .45rem; border-top: 1px solid #edf1f7; }
.mini-location strong { font-size: .67rem; }
.mini-contact { margin: 0 .6rem .6rem 1.3rem; border-radius: .45rem; background: #f1f5fc; }
.mini-contact strong { font-size: .64rem; }
.contact-actions { display: flex; gap: .28rem; }
.contact-actions i { display: block; width: 1.15rem; height: 1.15rem; border-radius: .3rem; background: #dbe7ff; }

.proof-strip { border-block: 1px solid var(--line); background: var(--wash); }
.proof-strip .section-shell { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; padding-block: 1rem; }
.proof-item { padding: .9rem 1.2rem; border-right: 1px solid var(--line); }
.proof-item:last-child { border-right: 0; }
.proof-item strong, .proof-item span { display: block; }
.proof-item strong { font-size: .9rem; }
.proof-item span { margin-top: .18rem; color: var(--muted); font-size: .76rem; }

.content-section { padding-block: clamp(4.5rem, 8vw, 7.5rem); }
.section-heading { max-width: 46rem; margin-bottom: 2.4rem; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.feature-card { padding: 1.45rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.feature-icon { display: grid; width: 2.6rem; height: 2.6rem; margin-bottom: 1.6rem; place-items: center; border-radius: .72rem; color: var(--blue); background: var(--blue-soft); font-size: 1.15rem; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: .92rem; }
.feature-card p + p { margin-top: .85rem; }

.workflow { background: var(--wash); }
.workflow-grid { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: clamp(2.5rem, 7vw, 7rem); }
.steps { display: grid; gap: .85rem; }
.step { display: grid; grid-template-columns: auto 1fr; gap: 1rem; padding: 1.15rem; border: 1px solid var(--line); border-radius: .9rem; background: var(--paper); }
.step-number { display: grid; width: 2rem; height: 2rem; place-items: center; border-radius: 50%; color: #fff; background: var(--blue); font-size: .75rem; font-weight: 850; }
.step p { margin: .2rem 0 0; color: var(--muted); font-size: .86rem; }

.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); align-items: stretch; gap: 1rem; }
.price-card { position: relative; display: flex; min-height: 24rem; flex-direction: column; padding: 1.55rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.price-card.featured { border-color: #8eb0f0; box-shadow: 0 20px 55px rgba(40, 100, 232, .12); }
.price-label { color: var(--muted); font-size: .82rem; font-weight: 750; }
.price { margin: .65rem 0 .25rem; font-size: 2.7rem; font-weight: 850; letter-spacing: -.06em; }
.price small { color: var(--muted); font-size: .85rem; font-weight: 650; letter-spacing: 0; }
.price-card ul { display: grid; gap: .5rem; margin: 1.25rem 0 1.8rem; padding: 0; list-style: none; color: #49566b; font-size: .88rem; }
.price-card li::before { content: "\2713"; margin-right: .5rem; color: var(--green); font-weight: 900; }
.price-card .button { margin-top: auto; }
.pricing-note { max-width: 48rem; margin: 1.35rem auto 0; color: var(--muted); font-size: .83rem; text-align: center; }

.about-band { color: #fff; background: #0f2448; }
.about-band .section-shell { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }
.about-band p { max-width: 45rem; margin-bottom: 0; color: #bdcbe1; }
.about-band .button.secondary { border-color: #61779a; color: #fff; }

.signup-section { background: var(--blue-soft); }
.signup-panel { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(2rem, 6vw, 5rem); padding: clamp(1.5rem, 4vw, 3.5rem); border: 1px solid #cbdafa; border-radius: 1.5rem; background: #fff; box-shadow: var(--shadow); }
.signup-copy p { color: var(--muted); }
.public-demo-card { margin-top: 1.6rem; padding: 1.2rem; border: 1px solid var(--line); border-left: .3rem solid var(--green); border-radius: .45rem; background: var(--wash); }
.public-demo-card .eyebrow { margin-bottom: .45rem; }
.public-demo-card h3 { margin-bottom: .55rem; font-family: Georgia, "Times New Roman", serif; font-size: 1.35rem; font-weight: 500; }
.public-demo-card > p { margin-bottom: .8rem; font-size: .86rem; }
.public-demo-credentials { display: grid; gap: .55rem; margin: 1rem 0; }
.public-demo-credentials div { min-width: 0; }
.public-demo-credentials dt { color: var(--muted); font-size: .68rem; font-weight: 850; letter-spacing: .09em; text-transform: uppercase; }
.public-demo-credentials dd { min-width: 0; margin: .1rem 0 0; }
.public-demo-credentials code { overflow-wrap: anywhere; color: var(--ink); font-size: .8rem; }
.public-demo-link { width: 100%; text-align: center; }
.public-demo-card .public-demo-note { margin: .7rem 0 0; font-size: .72rem; }
.signup-form { display: grid; grid-template-columns: 1fr 1fr; gap: .85rem; }
.signup-form label { color: #48566e; font-size: .78rem; font-weight: 750; }
.signup-form label span { display: block; margin-bottom: .3rem; }
.signup-form input,
.signup-form textarea,
.signup-form select { width: 100%; min-height: 2.75rem; padding: .65rem .72rem; border: 1px solid #cbd5e5; border-radius: .55rem; color: var(--ink); background: #fff; }
.signup-form input:focus,
.signup-form textarea:focus,
.signup-form select:focus { border-color: var(--blue); outline: 3px solid rgba(40,100,232,.14); }
.signup-form .full { grid-column: 1 / -1; }
.signup-form textarea { min-height: 5.4rem; resize: vertical; }
.signup-form .button { width: 100%; }
.form-status { display: none; margin: 0; padding: .75rem; border-radius: .55rem; color: #0e6048; background: #e7f7f1; font-size: .84rem; }
.form-status.is-visible { display: block; }
.marketing-alert { margin: 0 0 1.2rem; padding: 1rem 1.1rem; border: 1px solid #b8d7cc; border-radius: .45rem; color: #174f42; background: #eaf7f2; }
.marketing-alert.error { border-color: #e2b8b0; color: #7d2e25; background: #fff0ed; }
.captcha-help { margin: .3rem 0 0; color: var(--muted); font-size: .72rem; font-weight: 400; }
.form-trap { position: absolute !important; width: 1px !important; height: 1px !important; margin: -1px !important; padding: 0 !important; overflow: hidden !important; clip: rect(0 0 0 0) !important; white-space: nowrap !important; border: 0 !important; }

.site-footer { padding-block: 2.7rem; border-top: 1px solid var(--line); color: var(--muted); background: #fbfcfe; }
.footer-shell { display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: end; }
.footer-brand p { max-width: 32rem; margin: .65rem 0 0; font-size: .8rem; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .85rem 1.2rem; font-size: .8rem; }
.footer-links a:hover { color: var(--blue); }
.prototype-note { margin: 1.8rem 0 0; color: #8994a8; font-size: .7rem; }

/* Concept B: dark, editorial, high-contrast. */
.concept-b { --blue: #74a7ff; --blue-dark: #9bbfff; --blue-soft: #192d4e; --paper: #0b172b; --wash: #101f37; --ink: #f4f7fc; --muted: #aab8ce; --line: #2a3c57; background: var(--paper); }
.concept-b .site-header { border-color: rgba(67,89,121,.75); background: rgba(11,23,43,.92); }
.concept-b .logo-lockup, .concept-b .main-nav a { color: #eaf0fa; }
.concept-b .main-nav a:hover, .concept-b .main-nav a:focus-visible { color: #fff; background: #1a304f; }
.concept-b .main-nav .nav-cta { color: #0b172b; background: #dbe8ff; }
.concept-b .menu-button { color: #fff; border-color: var(--line); background: #13243d; }
.concept-b .button { color: #0b172b; background: #a9c7ff; }
.concept-b .button:hover,
.concept-b .button:focus-visible { color: #081322; background: #dbe8ff; }
.concept-b .button.secondary { color: #f4f7fc; border-color: #526784; background: transparent; }
.concept-b .button.secondary:hover,
.concept-b .button.secondary:focus-visible { color: #fff; border-color: #7896c0; background: #192d4e; }
.concept-b .hero { background: radial-gradient(circle at 76% 30%, rgba(66,124,228,.26), transparent 34%), linear-gradient(180deg, #0b172b, #0d1b31); }
.concept-b .hero .section-shell { grid-template-columns: 1.02fr .98fr; }
.concept-b h1 { max-width: 12ch; }
.concept-b .hero h1 em { color: #8fb7ff; font-style: normal; }
.concept-b .product-window { border-color: #405575; background: #111f35; box-shadow: 0 30px 90px rgba(0,0,0,.35); transform: rotate(1.4deg); }
.concept-b .product-bar, .concept-b .mini-company { color: #17243a; }
.concept-b .proof-strip { border-color: #263a58; background: #0d1a2f; }
.concept-b .feature-card, .concept-b .step, .concept-b .price-card, .concept-b .signup-panel { border-color: var(--line); background: #111f36; }
.concept-b .feature-icon { color: #bcd3ff; background: #1c355b; }
.concept-b .workflow { background: #0f1d33; }
.concept-b .price-card.featured { border-color: #668fcf; box-shadow: 0 20px 60px rgba(0,0,0,.3); }
.concept-b .price-card ul { color: #c3cde0; }
.concept-b .about-band { background: #193f7c; }
.concept-b .about-band .button.secondary { color: #fff; border-color: #89a4cf; }
.concept-b .signup-section { background: #0e1c31; }
.concept-b .signup-form input, .concept-b .signup-form textarea, .concept-b .signup-form select { color: #edf3fc; border-color: #405270; background: #0c192c; }
.concept-b .signup-form label { color: #c6d0e1; }
.concept-b .site-footer { border-color: var(--line); background: #081322; }

/* Concept C: warm editorial operations aesthetic. */
.concept-c { --ink: #132c33; --muted: #5e716f; --line: #ccd9d5; --paper: #fbfcf8; --wash: #edf3ef; --blue: #116b69; --blue-dark: #0a5150; --blue-soft: #dcecea; --green: #bf642b; --shadow: 0 25px 65px rgba(35, 73, 70, .13); background: var(--paper); }
.concept-c .site-header { background: rgba(251,252,248,.94); }
.concept-c .logo-mark { background: #116b69; box-shadow: none; }
.concept-c .nav-cta, .concept-c .button { border-radius: 999px; box-shadow: none; }
.concept-c .hero { background: linear-gradient(120deg, #f7f8f1 0 58%, #e4efeb 58%); }
.concept-c .hero .section-shell { grid-template-columns: 1fr 1fr; }
.concept-c h1 { max-width: 12ch; font-family: Georgia, "Times New Roman", serif; font-weight: 500; }
.concept-c h2 { font-family: Georgia, "Times New Roman", serif; font-weight: 500; }
.concept-c .product-window { border-radius: .3rem; transform: rotate(-1.2deg); }
.concept-c .product-mark { background: #116b69; }
.concept-c .proof-strip { background: #173e44; color: #fff; }
.concept-c .proof-item { border-color: #416269; }
.concept-c .proof-item span { color: #bed0d1; }
.concept-c .feature-grid { grid-template-columns: 1.2fr .8fr .8fr; grid-template-rows: auto auto; }
.concept-c .feature-card { border-radius: .4rem; }
.concept-c .feature-card:first-child { grid-row: 1 / 3; padding: 2rem; background: #173e44; color: #fff; }
.concept-c .feature-card:first-child p { color: #c7d8d8; }
.concept-c .feature-card:first-child .feature-icon { color: #fff; background: #bf642b; }
.concept-c .workflow { background: #e9f0ec; }
.concept-c .step { border-radius: .35rem; }
.concept-c .step-number { background: #bf642b; }
.concept-c .price-card { border-radius: .4rem; }
.concept-c .price-card.featured { border: 2px solid #116b69; box-shadow: none; }
.concept-c .about-band { background: #bf642b; }
.concept-c .about-band p { color: #fff4e9; }
.concept-c .signup-section { background: #173e44; }
.concept-c .signup-panel { border-radius: .45rem; box-shadow: none; }

/* Concept D retains Concept C's visual system without the tilted interface preview. */
.concept-d .product-window { transform: none; }

@media (max-width: 900px) {
    .hero .section-shell, .concept-b .hero .section-shell, .concept-c .hero .section-shell, .workflow-grid, .signup-panel { grid-template-columns: 1fr; }
    .hero .section-shell { min-height: auto; }
    .hero-copy { max-width: 46rem; }
    .product-window { width: min(100%, 42rem); margin-inline: auto; }
    .feature-grid, .concept-c .feature-grid { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
    .concept-c .feature-card:first-child { grid-row: auto; }
    .proof-strip .section-shell { grid-template-columns: 1fr 1fr; }
    .proof-item:nth-child(2) { border-right: 0; }
    .pricing-grid { grid-template-columns: 1fr; }
    .price-card { min-height: 0; }
}

@media (max-width: 720px) {
    .nav-shell { min-height: 3.8rem; flex-wrap: wrap; padding-block: .55rem; }
    .menu-button { display: inline-flex; }
    .main-nav { display: none; width: 100%; margin: 0; flex-direction: column; align-items: stretch; padding: .35rem 0 .65rem; }
    .main-nav.is-open { display: flex; }
    .main-nav a { text-align: center; }
    .main-nav .nav-cta { margin: .25rem 0 0; }
    .hero .section-shell { gap: 2.7rem; padding-block: 3.7rem; }
    h1 { font-size: clamp(2.45rem, 13vw, 3.7rem); }
    .feature-grid, .concept-c .feature-grid { grid-template-columns: 1fr; }
    .proof-strip .section-shell { grid-template-columns: 1fr; }
    .proof-item { border-right: 0; border-bottom: 1px solid var(--line); }
    .concept-c .proof-item { border-color: #416269; }
    .proof-item:last-child { border-bottom: 0; }
    .about-band .section-shell, .footer-shell { grid-template-columns: 1fr; }
    .footer-links { justify-content: flex-start; }
    .signup-form { grid-template-columns: 1fr; }
    .signup-form .full { grid-column: auto; }
    .concept-c .hero { background: linear-gradient(160deg, #f7f8f1 0 68%, #e4efeb 68%); }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}