/* roadmap.css — Roadmap-specific styles */
/* Inherits variables and topbar from ../styles.css */

/* ── Override main layout for centered roadmap ───────────────────────────── */
main.roadmap-main {
    max-width: 760px;
    margin: 0 auto;
    /*
     * At viewports where auto-centering already pushes content past the nudge (~96px),
     * padding returns to the base 24px. Below that (700–950px), it grows up to 96px
     * so the nudge always sits in blank space. Formula: 50vw - 380px = natural margin.
     */
    --_side-pad: clamp(24px, calc(96px - max(0px, calc(50vw - 380px))), 96px);
    padding: 52px var(--_side-pad) 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
}

/* ── Title ────────────────────────────────────────────────────────────────── */
.roadmap-title {
    text-align: center;
    cursor: default;
}

.roadmap-title-link {
    color: inherit;
    text-decoration: none;
    transition: opacity 0.18s;
}

.roadmap-title-link:hover {
    opacity: 0.75;
}

.roadmap-subtitle {
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-top: 8px;
    margin-bottom: 36px;
    text-align: center;
}

/* ── Tab switcher ─────────────────────────────────────────────────────────── */
.tab-switcher {
    display: flex;
    gap: 0;
    background: var(--surface-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 4px;
    margin-bottom: 56px;
    align-self: center;
}

.tab-btn {
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 8px 22px;
    border-radius: calc(var(--radius-md) - 2px);
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text);
    background: var(--surface-hover);
}

.tab-btn--active {
    background: var(--surface-hover);
    color: var(--accent);
    box-shadow: 0 0 0 1px var(--border);
}

/* ── Timeline ─────────────────────────────────────────────────────────────── */
.roadmap-timeline {
    width: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Continuous vertical line running through all rows */
.roadmap-timeline::before {
    content: '';
    position: absolute;
    left: 112px;
    /* aligns with dot center */
    top: 12px;
    bottom: 12px;
    width: 1px;
    background: linear-gradient(to bottom, transparent, var(--border) 5%, var(--border) 95%, transparent);
    pointer-events: none;
}

.timeline-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 0 20px;
    margin-bottom: 20px;
    align-items: start;
}

.timeline-row--last {
    margin-bottom: 0;
}

/* ── Left column: timestamp + dot ─────────────────────────────────────────── */
.timeline-left {
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    gap: 10px;
    padding-top: 18px;
    /* aligns with card top */
    position: relative;
}

.timeline-timestamp {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-align: right;
    line-height: 1.3;
    letter-spacing: 0.01em;
    flex-shrink: 0;
    max-width: 84px;
}

.timeline-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
    border: 2px solid var(--bg);
    outline: 1.5px solid var(--border);
    flex-shrink: 0;
    margin-top: 3px;
    transition: background 0.2s, outline-color 0.2s;
}

/* Dot lights up when its row's card is hovered */
.timeline-row:has(.step-card:hover) .timeline-dot,
.timeline-row:has(.step-card.popup-open) .timeline-dot {
    background: var(--accent);
    outline-color: var(--accent);
}

/* ── Right column: step cards ─────────────────────────────────────────────── */
.timeline-steps {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* ── Step card ────────────────────────────────────────────────────────────── */
.step-card {
    position: relative;
    background: var(--surface-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    outline: none;
    flex: 1;
    /* overflow visible so popup can escape card bounds */
    overflow: visible;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.step-card:hover,
.step-card:focus-visible {
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(72, 202, 228, 0.10);
}

.step-card.popup-open {
    border-color: var(--accent);
}

.step-card-inner {
    padding: 18px 20px 14px;
    transition: transform 0.22s cubic-bezier(0.34, 1, 0.64, 1);
}

.step-card:hover .step-card-inner,
.step-card.popup-open .step-card-inner {
    /* subtle leftward nudge to hint at popup appearing */
    transform: translateX(-5px);
}

.step-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
    line-height: 1.3;
    margin-bottom: 6px;
}

.step-card-desc {
    font-size: 0.865rem;
    color: var(--text-muted);
    line-height: 1.56;
    white-space: pre-line;
}

.step-card-desc b {
    font-weight: 700;
    color: #c4d3e8;
}

/* Hint text at bottom of card */
.step-card-hint {
    margin-top: 10px;
    font-size: 0.72rem;
    color: var(--text-dim);
    letter-spacing: 0.02em;
}

.step-hint-desktop {
    display: inline;
}

.step-hint-mobile {
    display: none;
}

/* ── Featured popup card ──────────────────────────────────────────────────── */
/* Desktop: appears on hover, anchored to top-right of card */
.featured-popup {
    position: absolute;
    top: 0;
    left: calc(100% + 10px);
    width: 240px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px 16px 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.04);
    z-index: 50;

    /* Hidden by default */
    opacity: 0;
    pointer-events: none;
    transform: translateX(-6px);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

/* Invisible bridge filling the gap between card edge and popup,
   keeping :hover alive while the mouse travels across */
.step-card.has-popup::after {
    content: '';
    position: absolute;
    top: 0;
    left: 100%;
    width: 14px;
    /* slightly wider than the 10px gap */
    height: 100%;
    background: transparent;
}

/* Show on card hover (desktop) — stays visible because popup is child of card */
.step-card:hover .featured-popup,
.step-card:focus-visible .featured-popup {
    opacity: 1;
    pointer-events: all;
    transform: translateX(0);
}

.fp-heading {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 12px;
}

.fp-section {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-bottom: 10px;
}

.fp-section:last-child {
    margin-bottom: 0;
}

.fp-section-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.fp-learn {
    color: var(--col-learn);
}

.fp-train {
    color: var(--col-train);
}

.fp-empty {
    color: var(--text-dim);
}

.fp-resource-link {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    text-decoration: none;
    transition: opacity 0.15s;
}

.fp-resource-link:hover {
    opacity: 0.75;
}

.fp-resource-title-group {
    flex: 1;
    min-width: 0;
}

.fp-resource-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
    display: inline;
}

.fp-resource-credit {
    display: inline-block;
    vertical-align: baseline;
    max-width: 100%;
    overflow-wrap: break-word;
    font-size: 0.76rem;
    color: var(--text-dim);
    line-height: 1.4;
}

.fp-resource-credit em {
    font-style: italic;
    color: var(--text-dim);
}

.fp-empty-note {
    display: block;
    font-size: 0.8rem;
    color: var(--text-dim);
    line-height: 1.5;
    font-style: italic;
}

.fp-group {
    display: contents;
    /* groups are purely logical; no extra box */
}

.fp-separator {
    height: 1px;
    background: var(--border);
    margin: 10px 0;
    opacity: 0.5;
}

/* ── Mobile popup (shown inline below card on tap) ────────────────────────── */
/* On mobile the popup becomes a drawer below the card */

/* Reused type badges from main styles */
.type-badge {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 2px 7px;
    border-radius: 20px;
    white-space: nowrap;
}

/* Ensure we inherit type colors from styles.css */
.type-doc-sheet {
    color: var(--type-doc);
    background: var(--type-doc-bg);
}

.type-video {
    color: var(--type-video);
    background: var(--type-video-bg);
}

.type-trainer {
    color: var(--type-trainer);
    background: var(--type-trainer-bg);
}

.type-image {
    color: var(--type-image);
    background: var(--type-image-bg);
}

.type-website {
    color: var(--type-website);
    background: var(--type-website-bg);
}

/* ── Content fade-in ──────────────────────────────────────────────────────── */
.roadmap-timeline {
    animation: fadeIn 0.22s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Branch group ─────────────────────────────────────────────────────────── */

/* Branch group — top-level sibling of timeline-rows */
.branch-group {
    width: 100%;
    margin: 4px 0 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 8px 16px 14px 0;
    position: relative;
    z-index: 0;
}

/* Nav row: same grid as timeline-row so the empty left column aligns with the line */
.branch-nav-row {
    display: block;
    margin-bottom: 8px;
}

/* Branch nav — always shown (carousel on all screen sizes) */
.branch-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 16px 10px 35px;
    position: relative;
}

.branch-nav-indicator {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-muted);
    position: absolute;
    left: 0;
    right: 0;
    text-align: center;
    pointer-events: none;
}

.branch-nav-prev {
    margin-left: auto;
}

.branch-label {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-dim);
    flex-shrink: 0;
}

.branch-nav-btn {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--surface-card);
    color: var(--text);
    cursor: pointer;
    transition: background 0.15s, opacity 0.15s;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.branch-nav-btn:disabled {
    opacity: 0.3;
    cursor: default;
}

.branch-nav-btn:not(:disabled):hover {
    background: var(--surface-hover);
}

.branch-nav-btn:not(:disabled):active {
    background: var(--surface-hover);
}

.branch-nav-row .timeline-left {
    display: none;
}

.branch-group-lanes {
    display: block;
}

/* Indent branch step cards slightly vs main-line cards */
.branch-timeline .timeline-steps {
    padding-left: 10px;
}

.branch-lane {
    display: none;
}

.branch-lane.branch-lane--active {
    display: block;
}

/* Branch lane: inherits timeline-row styles from parent, just a wrapper */
.branch-timeline {
    display: flex;
    flex-direction: column;
}

/* ── Tab description ──────────────────────────────────────────────────────── */
.roadmap-tab-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
    text-align: center;
    max-width: 540px;
    margin-top: -20px;
    margin-bottom: 28px;
    white-space: pre-line;
}

/* ── Path selector modal ──────────────────────────────────────────────────── */
.path-selector-backdrop {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease;
    padding: 24px;
}

.path-selector-backdrop.active {
    opacity: 1;
    pointer-events: all;
}

.path-selector-modal {
    background: var(--surface-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    width: 100%;
    max-width: 560px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.55);
    overflow: hidden;
    transform: translateY(8px);
    transition: transform 0.18s ease;
}

.path-selector-backdrop.active .path-selector-modal {
    transform: translateY(0);
}

.path-selector-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.path-selector-title {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.path-selector-close {
    font-size: 1.3rem;
    line-height: 1;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px 4px;
    transition: color 0.15s;
}

.path-selector-close:hover {
    color: var(--text);
}

.path-selector-list {
    padding: 6px 0;
}

.path-selector-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 20px;
    text-decoration: none;
    border-top: 1px solid var(--border);
    transition: background 0.12s;
}

.path-selector-row:first-child {
    border-top: none;
}

.path-selector-row:hover {
    background: var(--surface-hover);
}

.path-selector-arrow {
    flex-shrink: 0;
    color: var(--text-muted);
    transition: color 0.12s, transform 0.12s;
}

.path-selector-row:hover .path-selector-arrow {
    color: var(--accent);
    transform: translateX(3px);
}

.path-selector-text {
    font-size: 0.95rem;
    line-height: 1.55;
    color: var(--text-muted);
}

.path-selector-node-title {
    font-weight: 700;
    color: var(--text);
}

/* ── Mobile ───────────────────────────────────────────────────────────────── */
@media (max-width: 700px) {
    main.roadmap-main {
        padding: 36px 16px 0;
        align-items: stretch;
    }

    .roadmap-title {
        font-size: 2rem;
    }

    /* Collapse timeline columns — timestamp above card */
    .roadmap-timeline::before {
        left: 23px;
        top: 20px;
    }

    .timeline-row {
        grid-template-columns: 1fr;
        gap: 0;
        margin-bottom: 20px;
    }

    .timeline-row--last {
        margin-bottom: 0;
    }

    .branch-nav-row {
        grid-template-columns: 1fr;
        gap: 0;
        margin-bottom: 0;
    }

    .timeline-left {
        flex-direction: row;
        justify-content: flex-start;
        align-items: center;
        gap: 8px;
        padding-top: 0;
        margin-bottom: 8px;
        padding-left: 18px;
    }

    /* Branch nav on mobile: single row, indicator back in flow */
    .branch-nav {
        flex-wrap: nowrap;
        padding: 0 0 8px;
        padding-left: 18px;
    }

    .branch-nav-indicator {
        position: static;
        flex: 1;
        text-align: center;
        pointer-events: auto;
    }

    .branch-nav-prev {
        margin-left: 0;
    }

    .branch-label {
        flex: unset;
        width: auto;
        text-align: left;
        margin-bottom: 0;
        padding-left: 0;
    }

    .branch-nav-indicator {
        flex: 1;
        text-align: center;
        margin-right: 0;
    }

    .timeline-dot {
        order: -1;
        margin-top: 0;
    }

    .timeline-timestamp {
        text-align: left;
        max-width: none;
        font-size: 0.78rem;
    }

    /* Card inner: no nudge on mobile (we're using tap) */
    .step-card:hover .step-card-inner,
    .step-card.popup-open .step-card-inner {
        transform: none;
    }

    /* Suppress sticky hover highlight when a popup is expanded */
    .roadmap-container:has(.step-card.popup-open) .step-card:hover {
        border-color: var(--border);
        box-shadow: none;
    }

    /* Swap hint text */
    .step-hint-desktop {
        display: none;
    }

    .step-hint-mobile {
        display: inline;
    }

    /* Featured popup becomes a drawer below the card on mobile */
    .featured-popup {
        position: static;
        width: 100%;
        opacity: 0;
        max-height: 0;
        overflow: hidden;
        padding: 0 16px;
        pointer-events: none;
        transform: none;
        border: none;
        border-top: 1px solid var(--border);
        border-radius: 0 0 var(--radius-md) var(--radius-md);
        box-shadow: none;
        background: var(--surface);
        transition: opacity 0.2s ease, max-height 0.25s ease, padding 0.2s ease;
    }

    /* Shown when card has popup-open class */
    .step-card.popup-open .featured-popup {
        opacity: 1;
        max-height: 600px;
        overflow-y: auto;
        padding: 14px 16px 16px;
        pointer-events: all;
    }

    /* Don't show popup on hover on mobile */
    .step-card:hover .featured-popup:not(.step-card.popup-open .featured-popup) {
        opacity: 0;
    }
}

@media (max-width: 480px) {
    .tab-switcher {
        width: 100%;
    }

    .tab-btn {
        flex: 1;
        text-align: center;
        padding: 9px 12px;
    }
}