:root {
    --introl-blue: #06243f;
    --introl-blue-light: #173a5a;
    --introl-green: #5db35f;
    --introl-green-light: #75c876;
    --text-dark: #1c1c1c;
    --text-muted: #5c6570;
    --border-color: #d9dfe6;
    --bg-light: #f7f9fb;
    --bg-white: #ffffff;
    --shadow:
        0 22px 40px rgba(0,0,0,.18),
        0 8px 16px rgba(0,0,0,.08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    color: var(--text-dark);
    background: var(--bg-white);
    line-height: 1.7;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
}

h1,
h2,
h3 {
    margin-top: 0;
    line-height: 1.1;
}

h1 {
    font-size: clamp(4rem, 6vw, 6rem);
    margin-bottom: 1.5rem;
    color: var(--introl-blue);
}

h1 span {
    color: var(--introl-green);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
    color: var(--introl-blue);
}

h3 {
    font-size: 1.35rem;
    margin-bottom: .75rem;
}

p {
    margin-top: 0;
    margin-bottom: 1rem;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: .12em;
    font-size: .82rem;
    font-weight: 700;
    color: var(--introl-green);
    margin-bottom: 1rem;
}

section {
    padding: 80px 0;
    position: relative;
}

.section-light::after,
.section-white::after {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);

    width: min(1200px, 90%);
    height: 1px;

    background: rgba(6,36,63,.08);
}

.section-light {
    background:
        radial-gradient(
            circle at 90% 20%,
            rgba(93,179,95,.08),
            transparent 40%
        ),
        linear-gradient(
            180deg,
            #edf3f6 0%,
            #e7eef2 100%
        );
}

.section-white {
    background: #ffffff;
}

.section-heading {
    max-width: 850px;
    margin-bottom: 60px;
}

/* Header */

header {
    position: relative;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, .96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.header-layout {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 82px;
}

.logo img {
    height: 48px;
    width: auto;
    display: block;
}

.main-nav {
    display: flex;
    gap: 32px;
}

nav a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
}

nav a:hover {
    color: var(--introl-green);
}

/* Hero */

.hero-content {
    max-width: 700px;
}

.hero-section {
    padding-top: 60px;
    padding-bottom: 20px;

    display: flex;
    align-items: center;
    background:
        radial-gradient(circle at 82% 42%, rgba(86,165,90,.18), transparent 24%),
        radial-gradient(circle at 72% 55%, rgba(6,36,63,.08), transparent 32%),
        linear-gradient(180deg,#ffffff 0%,#f4f7f9 100%);
}

.hero-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
    gap: 48px;
    align-items: center;
}

.hero-lead {
    max-width: 700px;
    font-size: 1.2rem;
    color: var(--text-muted);
}

.cta-button {
    display: inline-block;
    margin-top: 20px;
    padding: 16px 32px;
    background: var(--introl-blue);
    color: white;
    text-decoration: none;
    font-weight: 700;
    border-radius: 8px;
    transition: transform .2s ease, box-shadow .2s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 22px rgba(6, 36, 63, .25);
}

/* CSS-rendered Introl hero mark */

.hero-graphic {
    display: flex;
    justify-content: center;
    align-items: center;
}

.introl-mark {
    width: 560px;
    max-width: 100%;
    transform: translateY(-40px);
}

.mark-row {
    display: flex;
    gap: 18px;
    margin-bottom: 24px;
}

.mark-row:last-child {
    margin-bottom: 0;
}

.mark-blue,
.mark-green {
    height: 78px;
    border-radius: 14px;
    box-shadow: var(--shadow);
}

.mark-blue {
    background:
        linear-gradient(
            135deg,
            #1d4f78 0%,
            #0b3458 35%,
            #06243f 100%
        );
}

.mark-green {
    width: 95px;
    background: linear-gradient(135deg, var(--introl-green-light), var(--introl-green));
}

.mark-short {
    width: 255px;
}

.mark-long {
    width: 368px;
}

/* Services */

.services-grid {
    display:grid;
    grid-template-columns:
        repeat(auto-fit,minmax(320px,1fr));
    gap:30px;
}

.service-card {
    background: rgba(255,255,255,.85);
    backdrop-filter: blur(6px);
    border: 1px solid #d9dfe6;
    border-radius: 16px;
    padding: 32px;

    box-shadow:
        0 12px 24px rgba(0,0,0,.05),
        0 2px 6px rgba(0,0,0,.03);

    transition:
        transform .25s ease,
        box-shadow .25s ease;
}

.service-card:hover {
    transform: translateY(-4px);

    box-shadow:
        0 18px 32px rgba(0,0,0,.08),
        0 6px 12px rgba(0,0,0,.04);
}

.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: "";

    position: absolute;

    top: 0;
    left: 0;

    width: 100%;
    height: 4px;

    background:
        linear-gradient(
            90deg,
            var(--introl-blue),
            var(--introl-green)
        );
}

.section-light {
    position: relative;
    overflow: hidden;
}

.section-light::before {
    content: "";

    position: absolute;

    top: -150px;
    right: -150px;

    width: 500px;
    height: 500px;

    background:
        radial-gradient(
            circle,
            rgba(93,179,95,.08) 0%,
            transparent 70%
        );

    pointer-events: none;
}

.service-card,
.experience-card {
    min-height: 260px;
    transition:
        transform .25s ease,
        box-shadow .25s ease;
}

/* Experience */

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 30px;
}

.experience-card {
    position: relative;
    overflow: hidden;

    background: rgba(255,255,255,.85);
    backdrop-filter: blur(6px);

    border: 1px solid #d9dfe6;
    border-radius: 16px;

    padding: 32px;

    box-shadow:
        0 12px 24px rgba(0,0,0,.05),
        0 2px 6px rgba(0,0,0,.03);

    transition:
        transform .25s ease,
        box-shadow .25s ease;
}

.experience-card::before {
    content: "";

    position: absolute;

    top: 0;
    left: 0;

    width: 100%;
    height: 4px;

    background:
        linear-gradient(
            90deg,
            var(--introl-blue),
            var(--introl-green)
        );
}

.service-card:hover,
.experience-card:hover {
    transform: translateY(-4px);

    box-shadow:
        0 14px 24px rgba(0,0,0,.08);
}

/* About */

#about {
    padding: 80px 0;
}

.about-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 80px;
}

.about-copy {
    font-size: 1.05rem;
    color: var(--text-muted);
}

.credentials-card {
    margin-top: 32px;

    background: rgba(255,255,255,.85);
    backdrop-filter: blur(6px);

    border: 1px solid #d9dfe6;
    border-radius: 16px;

    padding: 20px 24px;

    box-shadow:
        0 12px 24px rgba(0,0,0,.05),
        0 2px 6px rgba(0,0,0,.03);

    max-width: 300px;
}

.credentials-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
    color: var(--introl-blue);
}

.credentials-card p {
    font-size: 1rem;
    margin: 0 0 8px 0;
    color: var(--text-dark);
    font-weight: 500;
}

.credentials-card p:last-child {
    margin-bottom: 0;
}

/* Contact */

.contact-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 80px;
    align-items: start;
}

.contact-copy p {
    color: var(--text-muted);
}

.contact-copy h2 {
    max-width: 720px;
}

.contact-topics {
    margin-top: 28px;
}

.contact-topics p {
    margin-bottom: 12px;
    font-weight: 700;
    color: var(--introl-blue);
}

.contact-topics ul {
    margin: 0;
    padding-left: 0;
    list-style: none;
    color: var(--text-muted);
}

.contact-topics li {
    position: relative;
    margin-bottom: 10px;
    padding-left: 24px;
}

.contact-topics li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .7em;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--introl-green);
}

.contact-note {
    margin-top: 28px;
    max-width: 620px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 12px;

    background: rgba(255,255,255,.85);
    backdrop-filter: blur(6px);

    border: 1px solid #d9dfe6;
    border-radius: 16px;

    padding: 32px 32px 24px 32px;

    box-shadow:
        0 12px 24px rgba(0,0,0,.05),
        0 2px 6px rgba(0,0,0,.03);
}

.contact-form label {
    font-weight: 700;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: 2px solid rgba(86, 165, 90, .35);
    border-color: var(--introl-green);
}

.contact-form button {
    margin-top: 10px;
    padding: 16px;
    width: fit-content;
    min-width: 220px;

    border: none;
    border-radius: 8px;

    background: var(--introl-blue);
    color: white;

    font-weight: 700;
    cursor: pointer;
}

.contact-form button:hover {
    background: #03192d;
}

.hidden-field {
    display: none;
}

.form-status {
    margin-top: 1rem;
    font-weight: 600;
    min-height: 1.5rem;
}

/* Footer */

footer {
    background: #052b52;
    color: #ffffff;
    padding: 36px 0;
}

.footer-layout {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    text-align: center;
}

.footer-brand p {
    margin-top: 8px;
    color: rgba(255,255,255,.75);
}

.footer-nav {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-nav a {
    color: rgba(255,255,255,.85);
    text-decoration: none;
}

.footer-nav a:hover {
    color: #5db85d;
}

.footer-copyright {
    color: rgba(255,255,255,.65);
    font-size: .95rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 2rem;
    color: #052b52;
    cursor: pointer;
}

/* Responsive */

@media (max-width: 900px) {

    /* Header */

    .header-layout {
        display: flex;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 18px 0;
    }

    .logo {
        flex: 0 0 auto;
    }

    .logo img {
        height: 42px;
        width: auto;
    }

    .menu-toggle {
        display: block;
        margin-left: auto;
    }

    .main-nav {
        display: none;

        position: absolute;
        top: 100%;
        left: 0;
        right: 0;

        background: white;
        border-top: 1px solid #d9dfe6;

        flex-direction: column;
        gap: 16px;
        padding: 20px;

        box-shadow:
            0 12px 24px rgba(0,0,0,.08);
    }

    .main-nav.active {
        display: flex;
    }

    .main-nav a {
        display: block;
        padding: 8px 0;
    }

    /* Layout */

    .hero-layout,
    .about-layout,
    .contact-layout {
        grid-template-columns: 1fr;
    }

    .hero-section {
        min-height: auto;
        padding-top: 80px;
    }

    .hero-graphic {
        order: -1;
    }

    /* Hero Mark */

    .introl-mark {
        width: 320px;
    }

    .mark-row {
        gap: 12px;
        margin-bottom: 16px;
    }

    .mark-blue,
    .mark-green {
        height: 52px;
        border-radius: 10px;
    }

    .mark-short {
        width: 160px;
    }

    .mark-long {
        width: 235px;
    }

    .mark-green {
        width: 60px;
    }

    /* Hero Typography */

    h1 {
        font-size: clamp(3rem, 10vw, 4.5rem);
    }
}