/* =====================================================================
   SimulAI.net - Consultancy Professional Grid
   Palette: #ffffff #111827 #374151 #4f46e5 #eef2ff #059669 #e5e7eb #7c3aed
   Fonts:   DM Sans (display + body) | Roboto Mono (data)
   ===================================================================== */

:root {
    --c-white: #ffffff;
    --c-dark: #111827;
    --c-body: #374151;
    --c-brand: #4f46e5;
    --c-brand-2: #7c3aed;
    --c-brand-light: #eef2ff;
    --c-success: #059669;
    --c-border: #e5e7eb;

    --c-muted: #f8fafc;
    --c-body-soft: #6b7280;

    --font-display: "DM Sans", "Inter", system-ui, sans-serif;
    --font-body: "DM Sans", "Inter", sans-serif;
    --font-mono: "Roboto Mono", "Roboto", ui-monospace, monospace;

    --container-max: 1200px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.05);
    --shadow-md: 0 6px 18px rgba(17, 24, 39, 0.06);
    --shadow-lg: 0 24px 48px rgba(17, 24, 39, 0.08);

    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

@property --num {
    syntax: "<integer>";
    initial-value: 0;
    inherits: false;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.65;
    color: var(--c-body);
    background: var(--c-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img,
svg {
    display: block;
    max-width: 100%;
}

a {
    color: var(--c-brand);
    text-decoration: none;
    transition: color 160ms var(--ease-out);
}

a:hover {
    color: var(--c-brand-2);
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--c-dark);
    margin: 0;
    letter-spacing: -0.01em;
}

p {
    margin: 0;
}

ul,
ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

dl {
    margin: 0;
}

button {
    font-family: inherit;
}

/* ----------------------------- Layout ------------------------------- */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 6rem 0;
}

.section--muted {
    background: var(--c-muted);
}

.section__header {
    max-width: 720px;
    margin: 0 auto 3.5rem;
    text-align: center;
}

.section__title {
    font-size: clamp(1.75rem, 2.6vw, 2.5rem);
    line-height: 1.15;
    margin-bottom: 1rem;
}

.section__lede {
    color: var(--c-body);
    font-size: 1.0625rem;
    line-height: 1.6;
}

.eyebrow {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--c-brand);
    margin-bottom: 0.75rem;
    display: inline-block;
}

.eyebrow--light {
    color: rgba(255, 255, 255, 0.85);
}

/* ----------------------------- Buttons ------------------------------ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.9375rem;
    line-height: 1;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition:
        background-color 200ms var(--ease-out),
        color 200ms var(--ease-out),
        border-color 200ms var(--ease-out),
        transform 200ms var(--ease-out),
        box-shadow 200ms var(--ease-out);
    text-align: center;
}

.btn--primary {
    background: var(--c-brand);
    color: var(--c-white);
    border-color: var(--c-brand);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.25);
}

.btn--primary:hover {
    background: var(--c-brand-2);
    border-color: var(--c-brand-2);
    color: var(--c-white);
    transform: translateY(-1px);
    box-shadow: 0 10px 22px rgba(124, 58, 237, 0.28);
}

.btn--secondary {
    background: transparent;
    color: var(--c-brand);
    border-color: var(--c-brand);
}

.btn--secondary:hover {
    background: var(--c-brand-light);
    color: var(--c-brand);
}

.btn--secondary-light {
    background: rgba(255, 255, 255, 0.08);
    color: var(--c-white);
    border-color: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(2px);
}

.btn--secondary-light:hover {
    background: rgba(255, 255, 255, 0.16);
    color: var(--c-white);
    border-color: var(--c-white);
}

/* ----------------------------- Header ------------------------------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(140%) blur(8px);
    border-bottom: 1px solid transparent;
    transition: border-color 200ms var(--ease-out), box-shadow 200ms var(--ease-out);
}

.site-header.is-scrolled {
    border-bottom-color: var(--c-border);
    box-shadow: var(--shadow-sm);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--c-dark);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.01em;
}

.brand__mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--c-brand-light);
    color: var(--c-brand);
}

.brand__name {
    line-height: 1;
}

.brand__dot {
    color: var(--c-brand);
}

.brand--footer {
    color: var(--c-white);
}

.brand--footer .brand__mark {
    background: rgba(255, 255, 255, 0.08);
    color: var(--c-white);
}

.brand--footer .brand__dot {
    color: var(--c-brand);
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.primary-nav a {
    color: var(--c-body);
    font-weight: 500;
    font-size: 0.9375rem;
}

.primary-nav a:hover {
    color: var(--c-brand);
}

.primary-nav__cta {
    background: var(--c-brand);
    color: var(--c-white) !important;
    padding: 0.6rem 1.1rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: background-color 200ms var(--ease-out), transform 200ms var(--ease-out);
}

.primary-nav__cta:hover {
    background: var(--c-brand-2);
    color: var(--c-white) !important;
    transform: translateY(-1px);
}

/* ------------------------------ Hero -------------------------------- */

.hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: var(--c-white);
    padding: 6.5rem 0 7rem;
    isolation: isolate;
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;
}

.hero__grid {
    position: absolute;
    inset: -2px;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse at top right, rgba(0, 0, 0, 0.7), transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at top right, rgba(0, 0, 0, 0.7), transparent 70%);
}

.hero__bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.18), transparent 45%),
        radial-gradient(circle at 10% 95%, rgba(124, 58, 237, 0.45), transparent 55%);
}

.hero__inner {
    position: relative;
    max-width: 880px;
}

.hero__headline {
    font-size: clamp(2rem, 4.2vw, 3.5rem);
    line-height: 1.08;
    color: var(--c-white);
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
}

.hero__subtext {
    font-size: clamp(1.0625rem, 1.4vw, 1.25rem);
    line-height: 1.55;
    color: rgba(255, 255, 255, 0.86);
    max-width: 640px;
    margin-bottom: 2.25rem;
}

.hero__cta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.hero__signals {
    display: flex;
    flex-wrap: wrap;
    gap: 1.75rem;
    color: rgba(255, 255, 255, 0.78);
    font-size: 0.875rem;
}

.hero__signals li {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-weight: 500;
}

.hero__signal-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--c-success);
    box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.18);
}

/* ---------------------------- Features ------------------------------ */

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

.feature {
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition:
        transform 260ms var(--ease-out),
        border-color 260ms var(--ease-out),
        box-shadow 260ms var(--ease-out);
}

.feature:hover {
    transform: translateY(-4px);
    border-color: var(--c-brand-light);
    box-shadow: var(--shadow-lg);
}

.feature__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--c-brand-light);
    color: var(--c-brand);
    margin-bottom: 1.5rem;
}

.feature__title {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.feature__copy {
    color: var(--c-body);
    margin-bottom: 1.25rem;
}

.feature__points {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    color: var(--c-body);
    font-size: 0.9375rem;
    border-top: 1px solid var(--c-border);
    padding-top: 1.25rem;
}

.feature__points li {
    position: relative;
    padding-left: 1.25rem;
}

.feature__points li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--c-brand);
}

/* -------------------------- Case studies ---------------------------- */

.case-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.case-card {
    display: flex;
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition:
        transform 260ms var(--ease-out),
        box-shadow 260ms var(--ease-out),
        border-color 260ms var(--ease-out);
}

.case-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--c-brand-light);
}

.case-card__media {
    flex: 0 0 40%;
    background: var(--c-brand-light);
    display: flex;
    align-items: stretch;
    justify-content: stretch;
    min-height: 260px;
}

.case-card__art {
    width: 100%;
    height: 100%;
}

.case-card__body {
    flex: 1 1 60%;
    padding: 2.25rem 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.case-card__sector {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--c-brand);
}

.case-card__title {
    font-size: 1.4rem;
    line-height: 1.25;
}

.case-card__copy {
    color: var(--c-body);
}

.case-card__stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding-top: 1rem;
    margin-top: 0.25rem;
    border-top: 1px solid var(--c-border);
}

.case-card__stats div {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.case-card__stats dt {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--c-body-soft);
    font-family: var(--font-display);
}

.case-card__stats dd {
    margin: 0;
    font-family: var(--font-mono);
    font-feature-settings: "tnum";
    font-size: 1.25rem;
    color: var(--c-dark);
    font-weight: 500;
}

.case-card--reverse {
    flex-direction: row-reverse;
}

/* ----------------------------- Metrics ------------------------------ */

.metrics {
    background: var(--c-dark);
    color: var(--c-white);
    padding: 4.5rem 0;
}

.metrics__header {
    text-align: center;
    margin-bottom: 3rem;
}

.metrics__title {
    color: var(--c-white);
    font-size: clamp(1.5rem, 2.4vw, 2.25rem);
}

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

.metric {
    text-align: center;
    padding: 1.5rem 1rem;
    border-left: 1px solid rgba(255, 255, 255, 0.08);
}

.metric:first-child {
    border-left: none;
}

.metric__num {
    display: block;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2.5rem, 4vw, 3.25rem);
    line-height: 1;
    color: var(--c-white);
    font-feature-settings: "tnum";
    margin-bottom: 0.6rem;
    letter-spacing: -0.02em;
}

.metric__label {
    display: block;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
}

.metric.is-counting .metric__num {
    animation: countNum 1.6s var(--ease-out) forwards;
    counter-reset: num var(--num);
}

@keyframes countNum {
    from { --num: 0; }
    to   { --num: var(--count-target, 100); }
}

/* ----------------------------- Network ------------------------------ */

.network__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.network__copy .section__title {
    text-align: left;
    font-size: clamp(1.5rem, 2.4vw, 2.25rem);
}

.network__copy .section__lede {
    margin: 1rem 0 2rem;
}

.network__list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.network__list li {
    padding-left: 1.75rem;
    position: relative;
    color: var(--c-body);
}

.network__list li strong {
    color: var(--c-dark);
    font-weight: 700;
    font-family: var(--font-display);
}

.network__list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 12px;
    height: 12px;
    border: 2px solid var(--c-brand);
    border-radius: 3px;
    background: var(--c-brand-light);
}

.network__panel {
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 2.25rem;
    box-shadow: var(--shadow-sm);
}

.network__panel-title {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--c-border);
}

.network__steps {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    counter-reset: step;
}

.network__steps li {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.network__step-num {
    flex: 0 0 auto;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--c-brand);
    background: var(--c-brand-light);
    padding: 0.35rem 0.6rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    line-height: 1;
}

.network__step-title {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--c-dark);
    margin-bottom: 0.15rem;
}

.network__step-copy {
    font-size: 0.9375rem;
    color: var(--c-body);
}

/* ----------------------------- CTA band ----------------------------- */

.cta-band {
    background: var(--c-brand-light);
    border-top: 1px solid var(--c-border);
    border-bottom: 1px solid var(--c-border);
}

.cta-band__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.cta-band__title {
    font-size: clamp(1.4rem, 2vw, 1.875rem);
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.cta-band__copy {
    color: var(--c-body);
}

.cta-band__form {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.75rem;
    align-items: end;
}

.cta-band__field {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    grid-column: 1 / -1;
}

.cta-band__field span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--c-body-soft);
    font-family: var(--font-display);
    font-weight: 500;
}

.cta-band__field input {
    font-family: inherit;
    font-size: 1rem;
    padding: 0.85rem 1rem;
    border: 1px solid var(--c-border);
    background: var(--c-white);
    border-radius: var(--radius-md);
    color: var(--c-dark);
    transition: border-color 180ms var(--ease-out), box-shadow 180ms var(--ease-out);
}

.cta-band__field input:focus {
    outline: none;
    border-color: var(--c-brand);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
}

.cta-band__form .btn {
    grid-column: 1 / -1;
    justify-self: start;
}

.cta-band__status {
    grid-column: 1 / -1;
    min-height: 1.2em;
    font-size: 0.875rem;
    color: var(--c-success);
    font-family: var(--font-display);
}

.cta-band__status.is-error {
    color: #b91c1c;
}

/* ----------------------------- Footer ------------------------------- */

.site-footer {
    background: var(--c-dark);
    color: rgba(255, 255, 255, 0.72);
    padding: 4.5rem 0 2rem;
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__brand .brand {
    margin-bottom: 1rem;
}

.site-footer__tagline {
    color: rgba(255, 255, 255, 0.78);
    margin-bottom: 1rem;
    max-width: 22rem;
}

.site-footer__address {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.875rem;
    line-height: 1.6;
}

.site-footer__col h4 {
    color: var(--c-white);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    margin-bottom: 1rem;
    font-weight: 700;
}

.site-footer__col li {
    margin-bottom: 0.5rem;
}

.site-footer__col a {
    color: rgba(255, 255, 255, 0.62);
    font-size: 0.9375rem;
}

.site-footer__col a:hover {
    color: var(--c-white);
}

.site-footer__base {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1.5rem;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.8125rem;
}

.site-footer__compliance {
    font-family: var(--font-mono);
    letter-spacing: 0.06em;
}

/* --------------------------- Reveal anim ---------------------------- */

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition:
        opacity 600ms var(--ease-out),
        transform 600ms var(--ease-out);
    will-change: opacity, transform;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --------------------------- Responsive ----------------------------- */

@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: 1fr 1fr;
    }

    .metrics__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .metric:first-child,
    .metric:nth-child(3) {
        border-left: none;
    }

    .metric:nth-child(3) {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 2rem;
    }

    .metric:nth-child(4) {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 2rem;
    }

    .network__inner {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .site-footer__grid {
        grid-template-columns: 1fr 1fr 1fr;
    }

    .site-footer__brand {
        grid-column: 1 / -1;
    }

    .cta-band__inner {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 720px) {
    .section {
        padding: 4rem 0;
    }

    .hero {
        padding: 4.5rem 0 5rem;
    }

    .primary-nav {
        gap: 1rem;
    }

    .primary-nav a:not(.primary-nav__cta) {
        display: none;
    }

    .feature-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .case-card,
    .case-card--reverse {
        flex-direction: column;
    }

    .case-card__media {
        flex-basis: auto;
        min-height: 180px;
    }

    .case-card__body {
        padding: 1.75rem;
    }

    .case-card__stats {
        grid-template-columns: 1fr 1fr;
    }

    .metrics__grid {
        grid-template-columns: 1fr;
    }

    .metric {
        border-left: none !important;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 1.5rem;
    }

    .metric:first-child {
        border-top: none;
    }

    .site-footer__grid {
        grid-template-columns: 1fr 1fr;
    }

    .site-footer__base {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}

/* ------------------------ Reduced motion ---------------------------- */

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .reveal,
    .reveal.is-visible {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .feature,
    .case-card,
    .btn,
    .primary-nav__cta {
        transition: none;
    }

    .metric.is-counting .metric__num {
        animation: none;
    }
}