/* =========================
   Base / Reset
========================= */
* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-content {
    flex: 1; /* растягивает контент на оставшееся место */
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: #0b0f1a;
    color: #e6edf3;
    line-height: 1.6;
}

/* =========================
   Header
========================= */
header {
    padding: 30px 60px;
    display: flex;
    align-items: center;
}

header img {
    display: block;
}

header h1 {
    font-weight: 600;
    font-size: 20px;
    letter-spacing: 0.5px;
    margin-left: 16px;
}

/* =========================
   Hero section
========================= */
.hero {
    text-align: center;
    padding: 40px 20px 40px;
}

.hero h2 {
    font-size: 40px;
    font-weight: 600;
    margin-bottom: 10px;
}

.hero p {
    color: #8b949e;
    font-size: 18px;
}

/* =========================
   Grid
========================= */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    padding: 40px 60px 60px;
}

/* =========================
   Card
========================= */
.card {
    background: #111827;
    border-radius: 16px;
    padding: 28px;
    transition: all 0.2s ease;
    border: 1px solid rgba(255,255,255,0.05);
    position: relative;
}

.card:hover {
    transform: translateY(-6px);
    border-color: #2563eb;
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.card h3 {
    margin-top: 0;
    font-size: 20px;
}

.card p {
    color: #9ca3af;
    margin: 12px 0 20px;
}

/* =========================
   Button
========================= */
.btn {
    display: inline-block;
    padding: 10px 16px;
    border-radius: 8px;
    text-decoration: none;
    background: #2563eb;
    color: #ffffff;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn:hover {
    background: #1d4ed8;
}

.btn-back {
    display: inline-flex; /* остаётся inline, не растягивается */
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 16px;
    font-weight: 500;
    color: #ffffff;
    background: #2563eb;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    width: auto;
    max-width: fit-content;
}

.btn-back:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
}

.btn-back:active {
    background: #1e40af;
    transform: translateY(0);
}

/* =========================
   Footer
========================= */

.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px;
    color: #6b7280;
    font-size: 14px;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer a {
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* =========================
   Links
========================= */
a {
    color: #60a5fa;
}

a:hover {
    color: #93c5fd;
}

/* =========================
   Legal / Content page
========================= */
.container {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    gap: 40px;
}

.sidebar {
    width: 250px;
}

.sidebar a {
    display: block;
    padding: 10px;
    border-radius: 8px;
    text-decoration: none;
    margin-bottom: 8px;
    background: #111827;
}

.sidebar a:hover {
    background: #1f2937;
}

.content {
    flex: 1;
    background: #111827;
    padding: 30px;
    border-radius: 16px;
}

.content h1, .content h2, .content h3 {
    margin-top: 20px;
}

.content ul {
    padding-left: 20px;
}

.content p {
    margin: 10px 0;
}

pre {
    background: #0b0f1a;
    padding: 12px;
    border-radius: 8px;
    overflow-x: auto;
}

/* =========================
   Responsive
========================= */
@media (max-width: 768px) {
    header {
        padding: 20px;
    }

    .hero {
        padding: 60px 20px 30px;
    }

    .hero h2 {
        font-size: 28px;
    }

    .grid {
        padding: 20px;
        gap: 20px;
    }

    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        display: flex;
        gap: 10px;
        overflow-x: auto;
    }

    .sidebar a {
        flex: 1;
        margin-bottom: 0;
    }

    .footer {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}