/* ---- roadmap: large photo, alternating rows, reveals as you scroll to it
   (each row is its own [data-reveal-group], reusing the site-wide reveal
   mechanism already in app.js) - photography carries the "wow" here, not a
   timed widget, matching the Hero/Closing CTA/Club Intro playbook rather
   than a SaaS feature-showcase pattern ---- */
.roadmap-rows {
    display: grid;
    padding-top: 40px;
}

.roadmap-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
    padding-block: 56px;
    border-bottom: 1px solid var(--ink-faint);
}

.roadmap-rows > .roadmap-row:first-child {
    padding-top: 0;
}

.roadmap-rows > .roadmap-row:last-child {
    padding-bottom: 0;
    border-bottom: none;
}

.roadmap-row--reverse .roadmap-row__media {
    order: 2;
}

.roadmap-row--reverse .roadmap-row__body {
    order: 1;
}

.roadmap-row__media {
    aspect-ratio: 5 / 4;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--paper-alt);
    position: relative;
}

.roadmap-row__media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.roadmap-row__media-empty {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px dashed var(--ink-faint);
    color: var(--ink-soft);
    opacity: .55;
}

.roadmap-row__media-empty svg {
    width: 28px;
    height: 28px;
}

.roadmap-row__media-empty span {
    font-size: 12px;
    font-weight: 600;
}

.roadmap-row__meta {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.roadmap-row__icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.roadmap-row__icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--accent-text);
    fill: none;
    stroke-width: 1.6;
}

.roadmap-row__months {
    font-size: 17px;
    font-weight: 700;
    color: var(--accent-text);
}

.roadmap-row__topic {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: clamp(1.5rem, 2.4vw, 1.9rem);
    color: var(--ink);
    margin: 0 0 14px;
}

.roadmap-row__desc {
    font-size: 15px;
    color: var(--ink-soft);
    line-height: 1.7;
    margin: 0;
    max-width: 52ch;
}

@media (max-width: 900px) {
    .roadmap-row {
        grid-template-columns: 1fr;
        gap: 24px;
        padding-block: 40px;
    }

    .roadmap-row__media,
    .roadmap-row__body {
        order: initial;
    }
}

/* ---- session structure: 3 blocks + arrows, one true sequence ---- */
.session-row {
    display: flex;
    align-items: stretch;
    gap: 0;
}

.session-card {
    flex: 1;
    border: 1px solid var(--ink-faint);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--paper);
    display: flex;
    flex-direction: column;
}

.session-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    flex-shrink: 0;
    color: var(--ink-faint);
}

.session-arrow svg {
    width: 22px;
    height: 22px;
}

.session-card__head {
    padding: 24px 24px 0;
    display: flex;
    align-items: center;
    gap: 14px;
}

.session-badge {
    background: var(--ink);
    color: var(--accent);
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 17px;
    border-radius: var(--radius-sm);
    padding: 6px 14px;
    line-height: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 52px;
}

.session-badge small {
    font-size: 11.5px;
    font-weight: 700;
    color: var(--accent-text);
    text-transform: uppercase;
    margin-top: 3px;
}

.session-card__head h3 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 15.5px;
    letter-spacing: .01em;
    margin: 0;
    color: var(--ink);
}

.session-card p {
    font-size: 13.5px;
    line-height: 1.6;
    color: var(--ink-soft);
    padding: 12px 24px 0;
    margin: 0;
}

.session-card__media {
    aspect-ratio: 4 / 3;
    margin: 18px 24px 24px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--paper-alt);
    position: relative;
}

.session-card__media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.session-card__media-empty {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: 1px dashed var(--ink-faint);
    border-radius: var(--radius-md);
    color: var(--ink-soft);
    opacity: .55;
}

.session-card__media-empty svg {
    width: 26px;
    height: 26px;
}

.session-card__media-empty span {
    font-size: 11px;
    font-weight: 600;
}

@media (max-width: 900px) {
    .session-row {
        flex-direction: column;
        gap: 16px;
    }

    .session-arrow {
        width: auto;
        height: 28px;
        transform: rotate(90deg);
    }
}

/* ---- age cards: named apart from home.css's own .tier-card (homepage
   carousel teaser) so the two components never get confused in the
   codebase, even though this page is where that teaser's "Xem chi tiết"
   button lands ---- */
.age-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.age-card {
    border: 1px solid var(--ink-faint);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--paper);
    display: flex;
    flex-direction: column;
    transition: transform .25s ease, box-shadow .25s ease;
}

.age-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.age-card__media {
    aspect-ratio: 16 / 10;
    background: var(--paper-alt);
    position: relative;
    overflow: hidden;
}

.age-card__media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.age-card__badge {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 1;
    border-radius: var(--radius-sm);
    background: var(--accent);
    color: var(--ink);
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 12.5px;
    padding: 6px 12px;
    letter-spacing: .02em;
}

.age-card__media-empty {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-bottom: 1px dashed var(--ink-faint);
    color: var(--ink-soft);
    opacity: .55;
}

.age-card__media-empty svg {
    width: 26px;
    height: 26px;
}

.age-card__media-empty span {
    font-size: 11px;
    font-weight: 600;
}

.age-card__body {
    padding: 26px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.age-card__icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}

.age-card__icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--accent-text);
    fill: none;
    stroke-width: 1.6;
}

.age-card h3 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 18px;
    margin: 0 0 10px;
    color: var(--ink);
}

.age-card__rule {
    width: 32px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    margin-bottom: 14px;
}

.age-card p {
    font-size: 13.5px;
    line-height: 1.6;
    color: var(--ink-soft);
    margin: 0 0 16px;
}

.age-card__list {
    list-style: none;
    margin: 0 0 22px;
    padding: 0;
    display: grid;
    gap: 10px;
    flex: 1;
}

.age-card__list li {
    position: relative;
    padding-left: 18px;
    font-size: 13.5px;
    line-height: 1.55;
    color: var(--ink);
}

.age-card__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
}

.age-card__body .btn {
    align-self: flex-start;
}

.age-card:hover .btn--outline {
    background: var(--ink);
    color: var(--white);
}

@media (max-width: 900px) {
    .age-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 700px) {
    .age-grid {
        grid-template-columns: 1fr;
    }
}