/* ---------------------------------------------------------------
   exp.html only.
   Layered on top of main.css: reuses the shared reset, fonts,
   nav, .p-a link colors, .text-header, .text-title, and
   .text-data rules, and only adds the new layout pieces
   (tab bar, timeline, certification grid).
   --------------------------------------------------------------- */

:root {
    --exp-line: #dddddd;
    --exp-border: #e5e5e5;
    --exp-meta: #555555;
}

/* Mini nav: tab bar that swaps which section is shown, instead of
   one long scrolling page. js/exp.js toggles [hidden] on the
   matching .exp-panel and .active on the matching .exp-tab.
   The bar itself is frozen just below the main site nav (using
   --nav-height, set by js/main.js) so it stays reachable while a
   long panel (e.g. Experience) is scrolled. --tabs-height is the
   bar's own rendered height, set by js/exp.js, so .exp-panel
   can reserve exactly enough space to clear it. */

.exp-tabs {
    position: fixed;
    top: var(--nav-height, 60px);
    left: 0;
    width: 100%;
    z-index: 500;
    display: flex;
    justify-content: center;
    gap: 4px;
    padding: 0 16px;
    background-color: #ffffff;
    border-bottom: 1px solid var(--exp-border);
    /* --nav-height only updates once the mobile nav's own open/close
       animation finishes (see js/main.js), so without its own transition
       this bar would jump to its new position in a single frame instead
       of easing along with the nav. */
    transition: top 0.25s ease;
}

.exp-tab {
    display: flex;
    align-items: center;
    min-height: 48.6px;
    padding: 0 26px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-family: 'Roboto', sans-serif;
    font-size: 18px;
    color: var(--exp-meta);
    cursor: pointer;
}

.exp-tab:hover {
    color: #000000;
}

.exp-tab.active {
    color: #000000;
    font-weight: bold;
    border-bottom-color: #000000;
}

.exp-panel {
    margin-top: calc(var(--tabs-height, 54px) + 20px);
}

/* Timeline (Experience / Academics) */

.timeline {
    position: relative;
    max-width: 900px;
    margin: 10px auto 40px;
    padding: 4px 16px;
}

.timeline::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 51px;
    width: 2px;
    background-color: var(--exp-line);
}

.timeline-item {
    position: relative;
    padding-left: 96px;
    margin-bottom: 28px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    top: 0;
    left: 0;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background-color: #ffffff;
    border: 1px solid var(--exp-border);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.timeline-marker img {
    max-width: 68%;
    max-height: 68%;
    object-fit: contain;
}

.timeline-content {
    padding-top: 2px;
}

.timeline-role + .timeline-role {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--exp-border);
}

.timeline-role-head {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    column-gap: 12px;
}

.timeline-date {
    margin-left: auto;
    white-space: nowrap;
    color: var(--exp-meta);
    font-family: 'Roboto', sans-serif;
    font-size: 13px;
}

.timeline-content .text-title {
    display: block;
    margin: 0 0 2px;
    font-weight: bold;
}

.timeline-org {
    margin: 0 0 10px;
    color: var(--exp-meta);
    font-family: 'Roboto', sans-serif;
    font-size: medium;
}

/* Certifications grid */

.cert-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    max-width: 900px;
    margin: 10px auto 40px;
    padding: 0 16px;
}

.cert-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 0 1 270px;
    border: 1px solid var(--exp-border);
    border-radius: 8px;
    padding: 14px 16px;
}

.cert-head {
    display: flex;
    align-items: center;
    gap: 14px;
}

.cert-logo {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    object-fit: contain;
}

.cert-body {
    min-width: 0;
}

.cert-body .text-title {
    display: block;
    margin: 0 0 2px;
    font-weight: bold;
    line-height: 1.25;
    min-height: 2.5em;
}

.cert-org,
.cert-date {
    margin: 0 0 6px;
    color: var(--exp-meta);
    font-family: 'Roboto', sans-serif;
    font-size: small;
}

.cert-credential {
    margin: 0;
    padding-left: 0;
    list-style: none;
    text-align: left;
}

.cert-credential li {
    overflow-wrap: break-word;
}

@media (max-width: 640px) {
    .exp-tabs {
        gap: 2px;
        padding: 0 8px;
    }

    .exp-tab {
        padding: 0 10px;
        font-size: 16px;
    }

    .timeline::before {
        left: 43px;
    }

    .timeline-item {
        padding-left: 72px;
    }

    .timeline-marker {
        width: 56px;
        height: 56px;
    }

    .timeline-date {
        margin-left: 0;
    }

    .cert-card {
        flex: 1 1 100%;
        align-items: center;
        text-align: center;
    }

    .cert-head {
        flex-direction: column;
        align-items: center;
    }

    .cert-credential {
        text-align: center;
    }
}