/* ========================================= */
/* === Startsidan: översikt med ett kort per del === */
/* ========================================= */

.home {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 20px 40px;
}

/* --- Hero --- */
.hero {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    align-items: center;
    gap: 32px;
    padding: 56px 0 24px;
}

.hero-kicker {
    margin: 0 0 8px;
    color: var(--accent);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.hero h1 {
    margin: 0;
    font-size: clamp(2.2rem, 5vw, 3.4rem);
    line-height: 1.08;
    font-weight: 800;
}

.hero-lead {
    margin: 18px 0 0;
    font-size: 1.12rem;
    color: var(--text-muted);
    max-width: 34em;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 26px;
}

.btn {
    display: inline-block;
    padding: 12px 22px;
    border-radius: 999px;
    font-weight: 700;
    text-decoration: none;
    transition: background-color 0.2s, color 0.2s, transform 0.1s;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--accent);
    color: var(--accent-text);
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: var(--accent-text);
}

.btn-secondary {
    border: 2px solid var(--accent);
    color: var(--accent);
}

.btn-secondary:hover {
    background: var(--secondary-bg);
}

.hero-why {
    margin: 22px 0 0;
    font-size: 0.92rem;
    color: var(--text-muted);
}

.hero-visual {
    padding: 18px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 10px 30px var(--card-shadow);
}

.hero-canvas {
    aspect-ratio: 4 / 3;
}

/* --- Facts --- */
.hero-facts {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 36px;
    margin: 18px 0 8px;
    padding: 16px;
    list-style: none;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
}

.hero-facts strong {
    color: var(--text-strong);
    font-size: 1.15rem;
    margin-right: 4px;
}

/* --- Groups and cards --- */
.group {
    margin-top: 40px;
}

.group h2 {
    margin: 0 0 14px;
    font-size: 1.35rem;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
}

.card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 4px 14px var(--card-shadow);
    color: var(--text);
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.card:hover,
.card:focus-visible {
    transform: translateY(-3px);
    border-color: var(--accent);
    box-shadow: 0 10px 26px var(--card-shadow);
    color: var(--text);
}

.preview {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--surface-2);
}

.card .preview {
    border-bottom: 1px solid var(--border);
}

.card-body {
    display: flex;
    flex: 1;
    flex-direction: column;
    padding: 14px 16px 16px;
}

.card h3 {
    margin: 0 0 6px;
    font-size: 1.1rem;
}

.card p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.card .card-tags {
    margin-top: 10px;
    font-family: Consolas, Menlo, monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.card-open {
    margin-top: auto;
    padding-top: 12px;
    color: var(--accent);
    font-weight: 700;
}

/* --- Footer --- */
.home-footer {
    margin-top: 56px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
}

.home-footer p {
    max-width: 46em;
    margin: 6px auto;
}

@media (max-width: 860px) {
    .hero {
        grid-template-columns: 1fr;
        padding-top: 32px;
    }

    .hero-visual {
        order: -1;
    }
}

@media (max-width: 600px) {
    .home {
        padding: 0 12px 32px;
    }

    .hero-facts {
        justify-content: flex-start;
        gap: 6px 20px;
    }
}

/* --- Startsidan: vad sidan hanterar --- */
.about-block {
    margin-top: 56px;
}

.about-block h2 {
    margin: 0 0 18px;
    font-size: 1.6rem;
}

.center {
    text-align: center;
    margin-top: 22px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 18px;
}

.feature {
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 4px 14px var(--card-shadow);
}

.feature-icon {
    font-size: 1.6rem;
}

.feature h3 {
    margin: 8px 0 6px;
    font-size: 1.1rem;
}

.feature p {
    margin: 0;
    color: var(--text-muted);
}

.topics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 4px 28px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.topics li {
    padding: 14px 0;
    border-top: 1px solid var(--border);
}

.topics a {
    color: var(--text-strong);
    font-size: 1.1rem;
    text-decoration: none;
}

.topics a:hover strong {
    color: var(--accent);
}

.topics p {
    margin: 4px 0 0;
    color: var(--text-muted);
}

.how-steps {
    display: grid;
    gap: 12px;
    padding: 0;
    margin: 0;
    list-style: none;
    counter-reset: step;
}

.how-steps li {
    position: relative;
    padding: 14px 16px 14px 58px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-muted);
    counter-increment: step;
}

.how-steps li::before {
    content: counter(step);
    position: absolute;
    left: 16px;
    top: 14px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--accent-text);
    font-weight: 800;
    line-height: 28px;
    text-align: center;
}

.how-steps strong {
    color: var(--text-strong);
}

.how-extras {
    margin: 16px 0 0;
    color: var(--text-muted);
    font-size: 0.92rem;
    text-align: center;
}

/* --- Översikten (/algorithms) --- */
.page-head {
    padding: 40px 0 0;
}

.page-head h1 {
    margin: 0;
    font-size: clamp(2rem, 4vw, 2.8rem);
}

/* --- Pausing the live previews --- */
.previews-toggle {
    display: block;
    margin: 10px auto 0;
    padding: 4px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
}

.previews-toggle:hover,
.previews-toggle[aria-pressed="true"] {
    color: var(--accent);
    border-color: var(--accent);
    background: transparent;
}

.page-head .previews-toggle {
    margin: 12px 0 0;
}

/* Machine learning overview: a part that is not built yet */
.card-soon {
    border-style: dashed;
    background: transparent;
    box-shadow: none;
}

.card-soon:hover {
    transform: none;
    box-shadow: none;
}

.card-soon h3,
.card-soon p {
    color: var(--text-muted);
}

.card-soon-label {
    align-self: flex-start;
    margin-top: auto;
    padding: 2px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.ml-book {
    margin-top: 32px;
}