:root {
    --navy: #071321;
    --navy-light: #102a45;
    --blue: #2476e8;
    --cyan: #48d5dc;
    --white: #ffffff;
    --light: #f5f8fc;
    --text: #172536;
    --muted: #687587;
    --border: #e1e8f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    color: var(--text);
    background: var(--white);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
}

a {
    color: inherit;
}

.container {
    width: min(1120px, 90%);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(7, 19, 33, 0.97);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.nav-wrapper {
    display: flex;
    min-height: 74px;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.logo {
    color: var(--white);
    font-size: 26px;
    font-weight: 800;
    letter-spacing: 2px;
    text-decoration: none;
}

.logo span {
    color: var(--cyan);
}

.main-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 25px;
}

.main-nav a {
    color: #dbe7f4;
    font-size: 14px;
    text-decoration: none;
    transition: color 0.25s ease;
}

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

.hero-section {
    display: flex;
    min-height: 650px;
    align-items: center;
    color: var(--white);
    background:
        radial-gradient(circle at 85% 20%, rgba(72, 213, 220, 0.22), transparent 26%),
        linear-gradient(120deg, var(--navy), var(--navy-light));
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    align-items: center;
    gap: 80px;
}

.eyebrow,
.section-label {
    margin-bottom: 17px;
    color: var(--blue);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.hero-section .eyebrow {
    color: var(--cyan);
}

.hero-content h1 {
    max-width: 680px;
    margin-bottom: 25px;
    font-size: clamp(42px, 6vw, 76px);
    line-height: 1.04;
}

.hero-description {
    max-width: 610px;
    color: #c7d5e5;
    font-size: 18px;
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 35px;
}

.button {
    display: inline-block;
    padding: 13px 23px;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.25s ease;
}

.button-primary {
    color: var(--white);
    background: var(--blue);
}

.button-primary:hover {
    background: #0959bf;
    transform: translateY(-2px);
}

.button-outline {
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.button-outline:hover {
    color: var(--cyan);
    border-color: var(--cyan);
}

.hero-panel {
    padding: 45px 35px;
    color: var(--white);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.08);
}

.hero-symbol {
    display: grid;
    width: 90px;
    height: 90px;
    margin: 0 auto 25px;
    place-items: center;
    color: var(--navy);
    border-radius: 50%;
    background: var(--cyan);
    font-size: 40px;
}

.hero-panel h2 {
    margin-bottom: 10px;
    font-size: 23px;
}

.hero-panel p {
    color: #c7d5e5;
}

.statistics-section {
    padding: 34px 0;
    color: var(--white);
    background: var(--blue);
}

.statistics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-item {
    padding: 4px 20px;
    text-align: center;
    border-right: 1px solid rgba(255, 255, 255, 0.28);
}

.stat-item:last-child {
    border-right: 0;
}

.stat-item strong,
.stat-item span {
    display: block;
}

.stat-item strong {
    font-size: 35px;
    line-height: 1.2;
}

.stat-item span {
    color: #deebff;
    font-size: 14px;
}

.content-section {
    padding: 100px 0;
}

.light-background {
    background: var(--light);
}

.about-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 80px;
}

.content-section h2 {
    max-width: 700px;
    margin-bottom: 35px;
    color: var(--navy);
    font-size: clamp(30px, 4vw, 49px);
    line-height: 1.13;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--muted);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.project-card {
    display: flex;
    min-height: 280px;
    padding: 30px;
    flex-direction: column;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--white);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.project-card:hover {
    box-shadow: 0 15px 35px rgba(20, 50, 90, 0.12);
    transform: translateY(-6px);
}

.project-number {
    margin-bottom: 20px;
    color: var(--blue);
    font-size: 14px;
    font-weight: 700;
}

.project-card h3 {
    margin-bottom: 15px;
    color: var(--navy);
    font-size: 21px;
    line-height: 1.3;
}

.project-card p {
    flex-grow: 1;
    color: var(--muted);
}

.project-card a {
    margin-top: 22px;
    color: var(--blue);
    font-weight: 700;
    text-decoration: none;
}

.dark-background {
    color: var(--white);
    background: var(--navy);
}

.dark-background h2 {
    color: var(--white);
}

.light-label {
    color: var(--cyan);
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.principle-card {
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.13);
    border-radius: 10px;
    background: var(--navy-light);
}

.principle-card h3 {
    margin-bottom: 12px;
    color: var(--cyan);
    font-size: 23px;
}

.principle-card p {
    color: #c7d5e5;
}

.quote-box {
    margin-top: 45px;
    padding: 25px;
    color: var(--cyan);
    border-left: 3px solid var(--cyan);
    font-size: 24px;
    font-style: italic;
}

.contact-section {
    padding: 75px 0;
    background: var(--light);
}

.contact-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.contact-box h2 {
    margin-bottom: 12px;
}

.contact-box p:not(.section-label) {
    color: var(--muted);
}

.site-footer {
    padding: 25px 0;
    color: #b9c8da;
    background: #040b13;
    font-size: 13px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

@media (max-width: 850px) {
    .nav-wrapper {
        padding: 15px 0;
        flex-direction: column;
    }

    .main-nav {
        justify-content: center;
    }

    .hero-section {
        padding: 80px 0;
    }

    .hero-grid,
    .about-grid {
        grid-template-columns: 1fr;
        gap: 45px;
    }

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

@media (max-width: 560px) {
    .hero-content h1 {
        font-size: 44px;
    }

    .statistics-grid,
    .project-grid,
    .principles-grid {
        grid-template-columns: 1fr;
    }

    .stat-item {
        padding: 14px;
        border-right: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.28);
    }

    .stat-item:last-child {
        border-bottom: 0;
    }

    .contact-box,
    .footer-content {
        align-items: flex-start;
        flex-direction: column;
    }
}