/* =========================================================
   Centeye Website 2026
   Initial visual system
   ========================================================= */


/* ---------- Design tokens ---------- */

:root {
    --color-bg: #fafaf9;
    --color-surface: #ffffff;
    --color-surface-alt: #f2f3f5;

    --color-text: #17191d;
    --color-text-soft: #5d626b;
    --color-text-faint: #858b95;

    --color-border: #dfe2e7;

    --color-brand: #7752a1;
    --color-brand-dark: #5f3f82;
    --color-blue: #3e52a4;
    --color-red: #ed1c24;

    --color-dark: #111720;
    --color-dark-soft: #1a222d;

    --content-width: 1240px;
    --content-narrow: 780px;

    --header-height: 104px;

    --space-xs: 0.5rem;
    --space-sm: 0.9rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;

    --shadow-soft:
        0 18px 50px rgba(22, 27, 34, 0.08);

    --transition: 180ms ease;
}


/* ---------- Base ---------- */

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;

    font-family:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Helvetica,
        Arial,
        sans-serif;

    font-size: 17px;
    line-height: 1.65;

    color: var(--color-text);
    background: var(--color-bg);

    -webkit-font-smoothing: antialiased;
}

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

a {
    color: inherit;
}

p {
    margin-top: 0;
}

h1,
h2,
h3 {
    margin-top: 0;

    line-height: 1.08;
    letter-spacing: -0.025em;
}

h1 {
    font-size: clamp(3.8rem, 7.6vw, 7rem);
    font-weight: 650;
}

h2 {
    font-size: clamp(2.4rem, 4.2vw, 4.2rem);
    font-weight: 620;
}

h3 {
    font-size: 1.35rem;
    font-weight: 620;
}

.container {
    width: min(calc(100% - 48px),
            var(--content-width));

    margin-inline: auto;
}


/* ---------- Common components ---------- */

.eyebrow {
    margin-bottom: 1.2rem;

    color: var(--color-brand);
    font-size: 0.78rem;
    font-weight: 700;

    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    min-height: 50px;
    padding: 0.8rem 1.35rem;

    border: 1px solid var(--color-brand);
    border-radius: var(--radius-sm);

    color: #ffffff;
    background: var(--color-brand);

    font-size: 0.95rem;
    font-weight: 650;

    text-decoration: none;

    transition:
        background var(--transition),
        border-color var(--transition),
        transform var(--transition);
}

.button:hover {
    background: var(--color-brand-dark);
    border-color: var(--color-brand-dark);
    transform: translateY(-1px);
}

.button-small {
    min-height: 42px;
    padding: 0.65rem 1rem;
    font-size: 0.86rem;
}

.text-link {
    color: var(--color-text);
    font-weight: 600;
    text-decoration: none;
}

.text-link:hover {
    color: var(--color-brand);
}


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

.site-header {
    position: sticky;
    z-index: 100;
    top: 0;

    height: var(--header-height);

    border-bottom: 1px solid rgba(223, 226, 231, 0.8);

    background:
        rgba(250, 250, 249, 0.92);

    backdrop-filter: blur(14px);
}

.header-inner {
    height: 100%;

    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.brand {
    flex-shrink: 0;

    text-decoration: none;
}

.brand-logo {
    display: block;
    width: auto;
    height: 86px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 1.65rem;

    margin-left: auto;
}

.main-nav a {
    color: var(--color-text-soft);

    font-size: 0.88rem;
    font-weight: 600;

    text-decoration: none;

    transition: color var(--transition);
}

.main-nav a:hover {
    color: var(--color-text);
}

.header-inner>.button {
    flex-shrink: 0;
}

.menu-toggle {
    display: none;

    width: 44px;
    height: 44px;
    padding: 0;

    border: 0;
    background: transparent;

    cursor: pointer;
}

.menu-toggle span {
    display: block;

    width: 24px;
    height: 2px;
    margin: 5px auto;

    background: var(--color-text);

    transition:
        transform var(--transition),
        opacity var(--transition);
}

.mobile-nav {
    display: none;
}

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

.hero {
    overflow: hidden;

    padding:
        clamp(5rem, 9vw, 8rem) 0 clamp(5rem, 9vw, 8rem);
}

.hero-grid {
    display: grid;
    grid-template-columns:
        minmax(0, 0.88fr) minmax(420px, 1.12fr);

    align-items: center;
    gap: clamp(3rem, 6vw, 7rem);
}

.hero-copy {
    position: relative;
    z-index: 2;
}

.hero h1 {
    margin-bottom: 1.6rem;
}

.hero-intro {
    max-width: 620px;
    margin-bottom: 2rem;

    color: var(--color-text-soft);

    font-size: clamp(1.1rem, 1.6vw, 1.28rem);
    line-height: 1.62;
}

.hero-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}


/* ---------- Image placeholders ---------- */

.placeholder-image {
    position: relative;
    overflow: hidden;

    display: flex;
    align-items: center;
    justify-content: center;

    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);

    color: var(--color-text-faint);

    background:
        radial-gradient(circle at 25% 30%,
            rgba(93, 71, 168, 0.20),
            transparent 32%),
        radial-gradient(circle at 70% 65%,
            rgba(56, 118, 185, 0.17),
            transparent 38%),
        linear-gradient(135deg,
            #f3f1f7,
            #e8edf3);
}

.placeholder-image span {
    padding: 2rem;

    font-size: 0.8rem;
    font-weight: 650;

    letter-spacing: 0.08em;
    text-align: center;
    text-transform: uppercase;
}

.hero-image {
    position: relative;
    overflow: hidden;

    min-height: 580px;

    border-radius: var(--radius-lg);

    background: #ffffff;
    box-shadow: var(--shadow-soft);

    transform: translateX(3vw);
}

.hero-image img {
    position: absolute;
    inset: 0;

    width: 100%;
    height: 100%;

    object-fit: cover;
    object-position: center;
}

/* ---------- General sections ---------- */

.section {
    padding:
        clamp(5rem, 8vw, 7.5rem) 0;
}

.section-alt {
    background: var(--color-surface-alt);
}

.section-heading {
    max-width: 900px;
    margin-bottom: 4rem;
}

.section-heading.narrow {
    max-width: var(--content-narrow);
}

.section-heading h2 {
    margin-bottom: 1.5rem;
}

.section-heading>p:last-child {
    color: var(--color-text-soft);
    font-size: 1.12rem;
}


/* ---------- Capabilities ---------- */

.capability-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);

    border-top: 1px solid var(--color-border);
}

.capability-card {
    min-height: 330px;
    padding: 2rem 2rem 2rem 0;

    border-right: 1px solid var(--color-border);
}

.capability-card:not(:first-child) {
    padding-left: 2rem;
}

.capability-card:last-child {
    border-right: 0;
}

.card-number {
    margin-bottom: 3.5rem;

    color: var(--color-brand);
    font-size: 0.8rem;
    font-weight: 700;

    letter-spacing: 0.08em;
}

.capability-card h3 {
    margin-bottom: 1rem;
}

.capability-card p:last-child {
    color: var(--color-text-soft);
}


/* ---------- Technology stack ---------- */

.technology-stack {
    display: grid;
    grid-template-columns:
        1fr auto 1fr auto 1.3fr auto 1.15fr auto 1.15fr;

    align-items: center;

    margin-top: 4.5rem;
    padding: 2.3rem;

    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);

    background: var(--color-surface);
}

.stack-item {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.stack-item span {
    color: var(--color-brand);

    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.stack-item strong {
    font-size: 1rem;
}

.stack-arrow {
    padding-inline: 1rem;

    color: var(--color-text-faint);
    font-size: 1.25rem;
}


/* ---------- Applications ---------- */

.application-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);

    border-top: 1px solid var(--color-border);
}

.application-grid article {
    min-height: 230px;
    padding: 2rem 2.5rem 2rem 0;

    border-bottom: 1px solid var(--color-border);
}

.application-grid article:nth-child(3n + 2),
.application-grid article:nth-child(3n + 3) {
    padding-left: 2.5rem;
    border-left: 1px solid var(--color-border);
}

.application-grid h3 {
    max-width: 270px;
    margin-bottom: 1.1rem;
}

.application-grid p {
    max-width: 330px;

    color: var(--color-text-soft);
}


/* ---------- Demonstrations ---------- */

.section-dark {
    color: #ffffff;
    background: var(--color-dark);
}

.section-dark .eyebrow {
    color: #aaa0d4;
}

.section-dark .section-heading {
    color: #ffffff;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.demo-card {
    padding-bottom: 1rem;
}

.demo-image {
    aspect-ratio: 16 / 10;
    min-height: 0;
    margin-bottom: 1.5rem;

    border-color: rgba(255, 255, 255, 0.12);

    color: rgba(255, 255, 255, 0.56);

    background:
        radial-gradient(circle at 20% 25%,
            rgba(113, 86, 191, 0.32),
            transparent 35%),
        radial-gradient(circle at 80% 75%,
            rgba(63, 133, 199, 0.24),
            transparent 40%),
        var(--color-dark-soft);
}

.demo-media {
    overflow: hidden;

    aspect-ratio: 16 / 10;
    margin-bottom: 1.5rem;

    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-lg);

    background: var(--color-dark-soft);
}

.demo-media video {
    display: block;

    width: 100%;
    height: 100%;

    object-fit: cover;
}

.demo-media img {
    display: block;

    width: 100%;
    height: 100%;

    object-fit: cover;
}

.demo-media-squash img {
    object-fit: fill;
}

.demo-card h3 {
    margin-bottom: 0.8rem;
}

.demo-card p {
    color: #adb5c0;
}


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

.credibility-intro {
    max-width: 820px;
    margin-bottom: 3rem;

    color: var(--color-text-soft);
    font-size: 1.1rem;
}

.organizations-label {
    margin-bottom: 2rem;

    color: var(--color-text-faint);
    font-size: 0.78rem;
    font-weight: 700;

    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);

    margin:
        1rem 0 5rem;

    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.metric {
    padding: 2.3rem 2rem;

    border-right: 1px solid var(--color-border);
}

.metric:first-child {
    padding-left: 0;
}

.metric:last-child {
    border-right: 0;
}

.metric strong {
    display: block;

    margin-bottom: 0.45rem;

    color: var(--color-brand-dark);

    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 620;
    line-height: 1;
    letter-spacing: -0.04em;
}

.metric span {
    color: var(--color-text-soft);
}

.customer-groups {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5rem;
}

.customer-groups h3 {
    margin-bottom: 1rem;
}

.customer-groups p {
    color: var(--color-text-soft);
}


/* ---------- Working with Centeye ---------- */

.work-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);

    border-top: 1px solid var(--color-border);
}

.work-grid article {
    min-height: 240px;
    padding: 2rem 2rem 2rem 0;

    border-right: 1px solid var(--color-border);
}

.work-grid article:not(:first-child) {
    padding-left: 2rem;
}

.work-grid article:last-child {
    border-right: 0;
}

.work-grid h3 {
    margin-bottom: 1rem;
}

.work-grid p {
    color: var(--color-text-soft);
}


/* ---------- Contact CTA ---------- */

.contact-section {
    padding:
        clamp(5rem, 9vw, 8rem) 0;

    color: #ffffff;
    background:
        linear-gradient(120deg,
            #3f3178,
            #283f70);
}

.contact-section .eyebrow {
    color: #d6d0ed;
}

.contact-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;

    align-items: end;
    gap: 4rem;
}

.contact-inner>div {
    max-width: 820px;
}

.contact-inner h2 {
    margin-bottom: 1.5rem;
}

.contact-inner p:last-child {
    max-width: 680px;
    margin-bottom: 0;

    color: rgba(255, 255, 255, 0.78);
}

.contact-section .button {
    border-color: #ffffff;

    color: var(--color-text);
    background: #ffffff;
}

.contact-section .button:hover {
    color: var(--color-brand-dark);
    background: #f2f2f2;
}


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

.site-footer {
    padding: 3.5rem 0;

    color: #adb5c0;
    background: #0b1017;

    font-size: 0.88rem;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.4fr 1fr auto;
    gap: 3rem;
}

.footer-inner strong {
    color: #ffffff;
    letter-spacing: 0.08em;
}

.footer-inner p {
    margin: 0.35rem 0;
}

.footer-inner a {
    color: inherit;
}


/* =========================================================
   Responsive
   ========================================================= */

@media (max-width: 1050px) {

    .main-nav {
        display: none;
    }

    .header-cta {
        margin-left: auto;
    }

    .menu-toggle {
        display: block;
    }

    .mobile-nav {
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;

        display: flex;
        flex-direction: column;

        padding: 0 24px;

        border-bottom: 1px solid var(--color-border);

        background: rgba(250, 250, 249, 0.98);

        opacity: 0;
        visibility: hidden;
        transform: translateY(-8px);

        transition:
            opacity var(--transition),
            visibility var(--transition),
            transform var(--transition);
    }

    .mobile-nav.open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .mobile-nav a {
        padding: 1rem 0;

        border-bottom: 1px solid var(--color-border);

        color: var(--color-text);
        font-size: 1rem;
        font-weight: 600;

        text-decoration: none;
    }

    .mobile-nav a:last-child {
        border-bottom: 0;
    }

    .menu-toggle.open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .menu-toggle.open span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .header-inner>.button {
        margin-left: auto;
    }

    .hero-grid {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }

    .hero-image {
        min-height: 480px;
        transform: none;
    }

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

    .capability-card,
    .work-grid article {
        border-bottom: 1px solid var(--color-border);
    }

    .capability-card:nth-child(2),
    .work-grid article:nth-child(2) {
        border-right: 0;
    }

    .capability-card:nth-child(3),
    .work-grid article:nth-child(3) {
        padding-left: 0;
    }

    .technology-stack {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .stack-arrow {
        padding: 0;
        transform: rotate(90deg);
        transform-origin: center;

        text-align: center;
    }
}


@media (max-width: 780px) {

    :root {
        --header-height: 76px;
    }

    .container {
        width: min(calc(100% - 32px),
                var(--content-width));
    }

    .header-inner {
        gap: 1rem;
    }

    .brand-logo {
        height: 58px;
    }

    .header-inner>.button {
        min-height: 38px;
        padding: 0.55rem 0.8rem;

        font-size: 0.76rem;
    }

    .hero {
        padding-top: 4rem;
    }

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

    .hero h1 {
        font-size: clamp(3.2rem, 15vw, 5rem);
    }

    .hero-image {
        min-height: 420px;
    }

    .section-heading {
        margin-bottom: 2.8rem;
    }

    .capability-grid,
    .application-grid,
    .demo-grid,
    .metrics,
    .customer-groups,
    .work-grid,
    .contact-inner,
    .footer-inner {
        grid-template-columns: 1fr;
    }

    .capability-card,
    .capability-card:not(:first-child),
    .application-grid article,
    .application-grid article:nth-child(3n + 2),
    .application-grid article:nth-child(3n + 3),
    .work-grid article,
    .work-grid article:not(:first-child),
    .metric,
    .metric:first-child {
        min-height: auto;

        padding:
            1.8rem 0;

        border-right: 0;
        border-left: 0;
        border-bottom: 1px solid var(--color-border);
    }

    .card-number {
        margin-bottom: 1.5rem;
    }

    .application-grid h3,
    .application-grid p {
        max-width: none;
    }

    .technology-stack {
        padding: 1.5rem;
    }

    .demo-grid {
        gap: 3rem;
    }

    .metrics {
        border-bottom: 0;
    }

    .metric strong {
        font-size: 3.3rem;
    }

    .customer-groups {
        gap: 2rem;
    }

    .contact-inner {
        align-items: start;
    }

    .contact-inner .button {
        justify-self: start;
    }
}