/* =============================================================================
   Home page learning roadmap
   A connected progression from course foundations to managed orchestration.
   ========================================================================== */

.learning-roadmap {
    margin: var(--space-4) 0 var(--space-8);
    padding: clamp(var(--space-4), 3vw, var(--space-8));
    border: 1px solid var(--border-color);
    border-radius: calc(var(--radius-lg) * 2);
    background:
        radial-gradient(circle at top left, color-mix(in srgb, var(--accent-color) 12%, transparent), transparent 34%),
        var(--card-bg-color);
    box-shadow: var(--shadow-card);
}

.learning-roadmap__header {
    max-width: 900px;
    margin-bottom: var(--space-6);
}

.learning-roadmap__eyebrow {
    width: fit-content;
    margin-bottom: var(--space-2);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-pill);
    background-color: var(--accent-color-soft);
    color: var(--accent-color);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.learning-roadmap__header h2 {
    margin-bottom: var(--space-2);
    color: var(--heading-color);
    font-size: clamp(2rem, 3vw, 2.6rem);
}

.learning-roadmap__intro {
    max-width: 780px;
    color: var(--text-color);
    font-size: 1.02rem;
}

.learning-roadmap__list {
    --roadmap-marker-size: 2.75rem;
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-5);
    margin: 0;
    padding: 0;
    list-style: none;
}

.learning-roadmap__list::before {
    position: absolute;
    top: calc(var(--roadmap-marker-size) / 2 - 1.5px);
    right: calc(var(--roadmap-marker-size) / 2);
    left: calc(var(--roadmap-marker-size) / 2);
    height: 3px;
    background: linear-gradient(90deg, #0f766e, #7c3aed, #d97706, #2563eb);
    content: "";
}

.learning-roadmap__stage {
    --stage-color: var(--accent-color);
    position: relative;
    display: grid;
    grid-template-rows: var(--roadmap-marker-size) 1fr;
    gap: var(--space-3);
    min-width: 0;
}

.learning-roadmap__stage--foundations { --stage-color: #0f766e; }
.learning-roadmap__stage--delivery { --stage-color: #7c3aed; }
.learning-roadmap__stage--automation { --stage-color: #d97706; }
.learning-roadmap__stage--orchestration { --stage-color: #2563eb; }

.learning-roadmap__stage:not(:last-child)::after {
    position: absolute;
    z-index: 2;
    top: calc(var(--roadmap-marker-size) / 2 - 0.36rem);
    left: calc(100% + var(--space-5) / 2 - 0.36rem);
    box-sizing: border-box;
    width: 0.72rem;
    height: 0.72rem;
    border-top: 3px solid currentColor;
    border-right: 3px solid currentColor;
    color: var(--stage-color);
    content: "";
    transform: rotate(45deg);
}

.learning-roadmap__marker {
    position: relative;
    z-index: 1;
    display: inline-grid;
    width: var(--roadmap-marker-size);
    height: var(--roadmap-marker-size);
    place-items: center;
    border: 4px solid var(--card-bg-color);
    border-radius: 50%;
    background-color: var(--stage-color);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--stage-color) 40%, var(--border-color));
    color: #ffffff;
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.04em;
}

.learning-roadmap__card {
    position: relative;
    height: 100%;
    overflow: hidden;
    border: 1px solid var(--border-color);
    border-top: 4px solid var(--stage-color);
    box-shadow: none;
}

.learning-roadmap__card:hover {
    transform: none;
    box-shadow: none;
}

.learning-roadmap__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.learning-roadmap__meta span {
    padding: 3px 8px;
    border-radius: var(--radius-pill);
    background-color: color-mix(in srgb, var(--stage-color) 12%, transparent);
    color: var(--stage-color);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.learning-roadmap__card h3 {
    margin-bottom: var(--space-2);
    font-size: 1.2rem;
}

.learning-roadmap__card p {
    flex-grow: 0;
    margin-bottom: var(--space-3);
}

.learning-roadmap__card .learning-roadmap__outcomes {
    display: grid;
    gap: var(--space-2);
    margin: auto 0 0;
    padding: 0;
    list-style: none;
}

.learning-roadmap__card .learning-roadmap__outcomes li {
    position: relative;
    padding-left: 1.35rem;
    color: var(--text-color);
    font-size: 0.86rem;
    line-height: 1.45;
}

.learning-roadmap__card .learning-roadmap__outcomes li::before {
    position: absolute;
    top: 0;
    left: 0;
    color: var(--stage-color);
    font-weight: 800;
    content: "✓";
}

@media (max-width: 1050px) {
    .learning-roadmap__list {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .learning-roadmap__list::before {
        top: calc(var(--roadmap-marker-size) / 2);
        right: auto;
        bottom: calc(var(--roadmap-marker-size) / 2);
        left: calc(var(--roadmap-marker-size) / 2 - 1px);
        width: 3px;
        height: auto;
        background: linear-gradient(180deg, #0f766e, #7c3aed, #d97706, #2563eb);
    }

    .learning-roadmap__stage {
        grid-template-columns: var(--roadmap-marker-size) minmax(0, 1fr);
        grid-template-rows: auto;
        gap: var(--space-3);
        align-items: start;
    }

    .learning-roadmap__stage:not(:last-child)::after {
        top: auto;
        right: auto;
        bottom: calc(var(--space-4) * -0.72);
        left: calc(var(--roadmap-marker-size) / 2 - 0.42rem);
        width: auto;
        height: auto;
        border: 0;
        font-size: 1.35rem;
        line-height: 1;
        content: "↓";
        transform: none;
    }
}

@media (max-width: 600px) {
    .learning-roadmap {
        padding: var(--space-3);
    }

    .learning-roadmap__list {
        --roadmap-marker-size: 2.4rem;
    }

    .learning-roadmap__card {
        padding: var(--space-3);
    }
}

@media print {
    .learning-roadmap {
        margin: 0 0 7mm;
        padding: 0;
        border: 0;
        background: none;
        box-shadow: none;
    }

    .learning-roadmap__eyebrow,
    .learning-roadmap__list::before,
    .learning-roadmap__stage::after {
        display: none;
    }

    .learning-roadmap__list {
        grid-template-columns: repeat(2, 1fr);
        gap: 4mm;
    }

    .learning-roadmap__stage {
        display: block;
    }

    .learning-roadmap__marker {
        margin-bottom: 2mm;
    }
}