* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    color: #ffffff;
    background: #020617;
}

.guide-page {
    max-width: 1100px;
    margin: 0 auto;
    padding: 28px;
}

.guide-shell {
    display: grid;
    gap: 26px;
}

.guide-header {
    padding: 28px;
    border-radius: 28px;
    background: rgba(15, 23, 42, 0.94);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.18);
}

.guide-header h1 {
    margin: 0 0 12px;
    font-size: clamp(2rem, 3vw, 2.8rem);
}

.guide-header p {
    margin: 0;
    color: #94a3b8;
    line-height: 1.6;
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.guide-card {
    position: relative;
    overflow: hidden;
    display: grid;
    gap: 12px;
    min-height: 100%;
    padding: 22px;
    border-radius: 22px;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.18);
}

.guide-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 3px;
    background: var(--guide-card-accent, #38bdf8);
}

.guide-card:nth-child(3n + 1) {
    --guide-card-accent: #38bdf8;
}

.guide-card:nth-child(3n + 2) {
    --guide-card-accent: #22c55e;
}

.guide-card:nth-child(3n) {
    --guide-card-accent: #f59e0b;
}

.guide-card h2 {
    margin: 0;
    font-size: 1.18rem;
}

.guide-card p {
    margin: 0;
    color: #cbd5e1;
    line-height: 1.6;
}

.guide-card p + p {
    margin-top: 12px;
}

@media (max-width: 720px) {
    .guide-page {
        padding: 18px;
    }

    .guide-header {
        padding: 22px;
        border-radius: 22px;
    }

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