:root {
    --bg: #f7f8fa;
    --surface: #ffffff;
    --text: #172033;
    --muted: #5f6b7a;
    --border: #dce1e8;
    --accent: #1f5eff;
    --accent-dark: #1746bd;
    --card-shadow: 0 10px 30px rgba(23, 32, 51, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: inherit;
}

.site-header {
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(10px);
}

.nav {
    max-width: 1100px;
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 20px;
}

    .nav-links a {
        text-decoration: none;
        color: var(--muted);
        font-size: 0.95rem;
    }

        .nav-links a:hover {
            color: var(--accent);
        }

.hero {
    max-width: 1100px;
    margin: 0 auto;
    padding: 96px 24px 72px;
}

.hero-content {
    max-width: 820px;
}

.eyebrow {
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 16px;
}

h1 {
    font-size: clamp(2.2rem, 5vw, 4.4rem);
    line-height: 1.05;
    letter-spacing: -0.05em;
    margin: 0 0 24px;
}

.hero-text {
    font-size: 1.15rem;
    color: var(--muted);
    max-width: 720px;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.button {
    display: inline-block;
    padding: 12px 18px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 700;
    border: 1px solid transparent;
}

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

        .button.primary:hover {
            background: var(--accent-dark);
        }

    .button.secondary {
        background: var(--surface);
        border-color: var(--border);
        color: var(--text);
    }

        .button.secondary:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

.section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 56px 24px;
}

.section-heading {
    max-width: 760px;
    margin-bottom: 28px;
}

h2 {
    font-size: 2rem;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin: 0 0 14px;
}

h3 {
    font-size: 1.25rem;
    line-height: 1.3;
    margin: 10px 0 12px;
}

.section p {
    color: var(--muted);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

    .tag-list span {
        background: var(--surface);
        border: 1px solid var(--border);
        padding: 8px 12px;
        border-radius: 999px;
        color: var(--muted);
        font-size: 0.95rem;
    }

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.project-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 24px;
    box-shadow: var(--card-shadow);
}

.project-meta {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 700;
}

.project-card p {
    color: var(--muted);
    margin-bottom: 18px;
}

.project-link {
    color: var(--accent);
    font-weight: 700;
    text-decoration: none;
}

    .project-link:hover {
        text-decoration: underline;
    }

.project-image-link {
    display: block;
    width: 100%;
    margin-bottom: 18px;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg);
}

.project-image {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: contain;
    background: #111827;
    transition: transform 0.25s ease;
}

.project-image-link:hover .project-image {
    transform: scale(1.03);
}

.featured-project {
    padding: 18px;
}

.about-section {
    display: grid;
    grid-template-columns: 1fr;
}

.contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 18px;
}

    .contact-links a {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 10px;
        padding: 10px 14px;
        text-decoration: none;
        font-weight: 700;
    }

        .contact-links a:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

.site-footer {
    border-top: 1px solid var(--border);
    padding: 28px 24px;
    text-align: center;
    color: var(--muted);
    font-size: 0.9rem;
}

@media (max-width: 760px) {
    .nav {
        align-items: flex-start;
        gap: 14px;
        flex-direction: column;
    }

    .nav-links {
        flex-wrap: wrap;
        gap: 12px;
    }

    .hero {
        padding-top: 64px;
    }

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

.project-hero {
    max-width: 1100px;
    margin: 0 auto;
    padding: 72px 24px 40px;
}

.back-link {
    display: inline-block;
    margin-bottom: 28px;
    color: var(--muted);
    text-decoration: none;
    font-weight: 700;
}

    .back-link:hover {
        color: var(--accent);
    }

.project-showcase {
    padding-top: 24px;
}

.case-study-image {
    width: 100%;
    display: block;
    border-radius: 18px;
    border: 1px solid var(--border);
    box-shadow: var(--card-shadow);
    background: var(--surface);
    object-fit: cover;
}

    .case-study-image.large {
        margin-bottom: 22px;
    }

.image-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

    .image-grid .case-study-image {
        aspect-ratio: 16 / 9;
    }

.case-study-layout {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
    gap: 32px;
    align-items: start;
}

.case-study-main {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 28px;
    box-shadow: var(--card-shadow);
}

    .case-study-main h2 {
        font-size: 1.45rem;
        margin-top: 28px;
    }

        .case-study-main h2:first-child {
            margin-top: 0;
        }

.case-study-list {
    color: var(--muted);
    padding-left: 20px;
}

    .case-study-list li {
        margin-bottom: 8px;
    }

.case-study-sidebar {
    display: grid;
    gap: 18px;
}

.sidebar-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 22px;
    box-shadow: var(--card-shadow);
}

    .sidebar-card h3 {
        margin-top: 0;
    }

.tag-list.compact {
    gap: 8px;
}

    .tag-list.compact span {
        font-size: 0.85rem;
        padding: 7px 10px;
    }

@media (max-width: 860px) {
    .case-study-layout {
        grid-template-columns: 1fr;
    }

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