/* =========================================================
   LEARN / CURRICULUM — extends style.css + article.css
   ========================================================= */

.hero__lede--secondary {
    margin-top: var(--space-3);
    font-size: 0.95rem;
    color: var(--bone);
    opacity: 0.88;
    max-width: 42rem;
}

/* Curriculum module grid on /learn */
.curriculum {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5);
    margin-top: var(--space-7);
}

@media (min-width: 720px) {
    .curriculum { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1100px) {
    .curriculum { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
}

.curriculum-module {
    background: var(--ink-3);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    transition: border-color 200ms ease, transform 200ms ease;
    position: relative;
}

.curriculum-module:hover {
    border-color: var(--line-2);
    transform: translateY(-2px);
}

.curriculum-module--free {
    border-color: var(--edge);
    background: linear-gradient(180deg, var(--edge-soft), var(--ink-3) 25%);
}

.curriculum-module--free:hover {
    border-color: var(--edge);
    box-shadow: 0 0 0 1px var(--edge-glow), 0 24px 48px -24px rgba(255, 106, 44, 0.3);
}

.curriculum-module--locked {
    opacity: 0.92;
}

.curriculum-module--preview {
    border-color: rgba(255, 106, 44, 0.54);
    background: linear-gradient(180deg, rgba(255, 106, 44, 0.09), var(--ink-3) 30%);
}

.curriculum-module--preview:hover {
    border-color: var(--edge);
}

.curriculum-module--locked .curriculum-module__title {
    color: var(--bone);
}

.curriculum-module__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--line);
}

.curriculum-module__num {
    font-family: var(--font-mono);
    font-size: var(--t-sm);
    font-weight: 700;
    color: var(--edge);
    letter-spacing: 0.06em;
}

.curriculum-module__tag {
    font-family: var(--font-mono);
    font-size: var(--t-xs);
    padding: 4px 10px;
    border-radius: var(--r-sm);
    letter-spacing: 0.04em;
    font-weight: 500;
}

.tag--locked {
    background: var(--ink-4);
    color: var(--bone-3);
    border: 1px solid var(--line-2);
}

.tag--preview {
    background: var(--edge-soft);
    color: var(--edge);
    border: 1px solid rgba(255, 106, 44, 0.46);
}

.curriculum-module__title {
    font-family: var(--font-display);
    font-size: var(--t-xl);
    line-height: 1.2;
    margin: 0;
    letter-spacing: -0.01em;
    color: var(--bone);
}

.curriculum-module__title a {
    color: inherit;
    text-decoration: none;
    transition: color 120ms ease;
}

.curriculum-module__title a:hover {
    color: var(--edge);
}

.curriculum-module__desc {
    color: var(--bone-2);
    line-height: 1.6;
    margin: 0;
    font-size: var(--t-sm);
}

.curriculum-module__topics {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    flex-grow: 1;
}

.curriculum-module__topics li {
    position: relative;
    padding-left: var(--space-5);
    font-size: var(--t-sm);
    color: var(--bone-3);
    line-height: 1.5;
}

.curriculum-module__topics li::before {
    content: "›";
    position: absolute;
    left: 0;
    top: 0;
    font-family: var(--font-mono);
    color: var(--edge);
    font-weight: 700;
}

.curriculum-module--free .curriculum-module__topics li {
    color: var(--bone-2);
}

/* =========================================================
   MODULE BODY ENHANCEMENTS — used inside article body
   ========================================================= */

/* Layer eyebrow under each "Layer N" heading */
.layer-eyebrow {
    font-family: var(--font-mono);
    font-size: var(--t-xs);
    color: var(--edge);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin: 0 0 var(--space-4);
    font-weight: 500;
}

/* Numbered ordered list with mono numerals */
.callout-list {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-5);
    counter-reset: callout-step;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.callout-list li {
    counter-increment: callout-step;
    position: relative;
    padding-left: 56px;
    color: var(--bone-2);
    line-height: 1.65;
    font-size: var(--t-base);
}

.callout-list li::before {
    content: counter(callout-step, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: 0;
    font-family: var(--font-mono);
    font-size: var(--t-sm);
    color: var(--edge);
    font-weight: 700;
    background: var(--ink-3);
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    width: 38px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    letter-spacing: -0.02em;
}

.callout-list strong {
    color: var(--bone);
    font-weight: 600;
}

/* Operator-voice callout block */
.callout {
    background: var(--ink-3);
    border-left: 3px solid var(--edge);
    border-radius: 0 var(--r-md) var(--r-md) 0;
    padding: var(--space-4) var(--space-5);
    margin: var(--space-5) 0;
}

.callout__label {
    font-family: var(--font-mono);
    font-size: var(--t-xs);
    color: var(--edge);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin: 0 0 var(--space-2) !important;
    font-weight: 500;
}

.callout p:not(.callout__label) {
    color: var(--bone);
    font-style: italic;
    line-height: 1.7;
    margin: 0;
    font-family: var(--font-display);
    font-size: var(--t-md);
    font-weight: 400;
}

/* Compact link list on /learn — free reading library */
.learn-library {
    list-style: none;
    padding: 0;
    margin: var(--space-6) 0 0;
    display: grid;
    gap: var(--space-3);
}

@media (min-width: 720px) {
    .learn-library {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
    }
}

.learn-library a {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-5);
    background: var(--ink-3);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    text-decoration: none;
    transition: border-color 160ms ease, transform 160ms ease;
}

.learn-library a:hover {
    border-color: var(--line-2);
    transform: translateY(-1px);
}

.learn-library strong {
    font-family: var(--font-display);
    font-size: var(--t-md);
    color: var(--bone);
    line-height: 1.3;
}

.learn-library span {
    font-size: var(--t-sm);
    color: var(--bone-3);
    line-height: 1.55;
}