:root {
    --page-bg: #0f1214;
    --surface: #191c1e;
    --surface-strong: #141719;
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.14);
    --text-main: #f4f6f8;
    --text-muted: #b7c0c8;
    --accent: #5fd2a7;
    --accent-strong: #27b985;
    --step-color: #79b9ff;
    --path-color: #ffd166;
    --end-color: #ff7a7a;
    --empty-color: #edf2f5;
    --wall-color: #181b1f;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text-main);
    font-family: Poppins, sans-serif;
    background-color: var(--page-bg);
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 48px 48px;
}

.projects-shell {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    padding: 20px 0 64px;
}

.projects-header {
    display: grid;
    gap: 20px;
    padding: 8px 0 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    margin-bottom: 24px;
}

.back-link,
.project-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 16px;
    border-radius: 2px;
    text-decoration: none;
    font-family: Poppins, sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.back-link {
    justify-self: start;
    justify-content: flex-start;
    width: auto;
    gap: 10px;
    color: var(--text-main);
    min-height: 0;
    padding: 0;
    font-size: 1rem;
    font-weight: 700;
    background: transparent;
    border: none;
}

.back-link::before {
    content: "<";
    font-size: 0.94rem;
}

.back-link:hover {
    color: var(--text-main);
    opacity: 0.72;
}

.projects-intro h1,
.project-copy h2 {
    margin: 0;
    font-family: Poppins, sans-serif;
    letter-spacing: 0.01em;
}

.projects-intro h1 {
    font-size: clamp(2rem, 4vw, 3.4rem);
    font-weight: 700;
}

.projects-intro p,
.project-copy p,
.projects-note,
.project-facts li {
    color: var(--text-muted);
    line-height: 1.65;
}

.projects-intro p {
    max-width: 760px;
    margin: 12px 0 0;
    font-size: 1.06rem;
}

.projects-grid {
    display: grid;
    gap: 20px;
}

.project-card {
    display: grid;
    grid-template-columns: minmax(260px, 320px) 1fr;
    background: rgba(24, 27, 30, 0.92);
    border: 1px solid var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.project-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px;
    background: rgba(17, 19, 22, 0.94);
    border-right: 1px solid var(--border);
}

.preview-board {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 6px;
    width: min(100%, 280px);
    aspect-ratio: 1;
}

.preview-cell {
    border-radius: 2px;
    background: var(--empty-color);
    box-shadow: inset 0 0 0 1px rgba(10, 13, 16, 0.2);
}

.preview-cell.wall {
    background: var(--wall-color);
}

.preview-cell.path {
    background: var(--path-color);
}

.preview-cell.start {
    background: var(--accent);
}

.preview-cell.end {
    background: var(--end-color);
}

.project-body {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 24px;
    padding: 28px;
}

.project-copy h2 {
    font-size: clamp(1.45rem, 2vw, 2rem);
    font-weight: 600;
}

.project-copy p {
    max-width: 720px;
    margin: 12px 0 0;
    font-size: 1rem;
}

.project-facts {
    list-style: none;
    margin: 0;
    padding: 0;
    border-top: 1px solid var(--border);
}

.project-facts li {
    padding: 12px 0;
    font-size: 0.98rem;
    border-bottom: 1px solid var(--border);
}

.project-link {
    color: #07110d;
    background: var(--accent);
    border: 1px solid var(--accent-strong);
}

.project-link:hover {
    color: #07110d;
    background: var(--accent-strong);
}

.projects-note {
    margin: 18px 0 0;
    font-size: 0.98rem;
}

@media (max-width: 820px) {
    .projects-shell {
        width: min(100% - 28px, 1180px);
        padding-top: 18px;
    }

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

    .project-preview {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
}

@media (max-width: 560px) {
    .projects-shell {
        width: min(100% - 20px, 1180px);
        padding-bottom: 40px;
    }

    .back-link {
        justify-content: flex-start;
    }

    .project-preview,
    .project-body {
        padding: 18px;
    }

    .projects-intro p,
    .project-copy p,
    .project-facts li,
    .projects-note {
        font-size: 0.96rem;
    }
}