/* ===========================
   SLIDER (projects, certifications, articles)
   One row of tiles with previous/next buttons; see js/slider.js
   =========================== */

.slider {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.slider[hidden] {
    display: none;
}

/* Higher specificity than the section grids it replaces */
.slider > .slider-track {
    --slider-gap: 1rem;
    --per-view: 3;
    flex: 1 1 0;
    min-width: 0;
    max-width: none;
    margin: 0;
    display: grid;
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: calc((100% - (var(--per-view) - 1) * var(--slider-gap)) / var(--per-view));
    gap: var(--slider-gap);
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: 2px;
    scroll-behavior: smooth;
    scrollbar-width: none;
    /* Room for hover lift and focus rings inside the scroll area */
    padding: 6px 2px 8px;
}

.slider > .slider-track::-webkit-scrollbar {
    display: none;
}

.slider > .slider-track > * {
    scroll-snap-align: start;
    min-width: 0;
}

/* Entrance animations shrink tiles slightly; in a row that would shift the
   snap points. Keep the fade, drop the resting transform (hover lift stays). */
.slider > .slider-track > *:not(:hover) {
    transform: none !important;
}

.slider-btn {
    flex: 0 0 auto;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid #dfe3ec;
    background: #ffffff;
    color: #4f5bd5;
    box-shadow: 0 4px 12px rgba(44, 62, 80, 0.08);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast);
}

.slider-btn svg {
    width: 18px;
    height: 18px;
}

.slider-btn:hover:not(:disabled),
.slider-btn:focus-visible {
    background: #eef0fd;
    border-color: #c9cff5;
}

.slider-btn:focus-visible {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

.slider-btn:disabled {
    opacity: 0.35;
    cursor: default;
}

.slider-status {
    flex-basis: 100%;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 0.15rem;
    min-height: 1.2em;
}

/* Everything fits: no buttons, no counter */
.slider-static .slider-btn,
.slider-static .slider-status {
    display: none;
}

@media (max-width: 1024px) {
    .slider > .slider-track {
        --per-view: 2;
    }
}

@media (max-width: 640px) {
    .slider {
        gap: 0.35rem;
    }

    .slider > .slider-track {
        --per-view: 1;
        --slider-gap: 0.75rem;
    }

    .slider-btn {
        width: 34px;
        height: 34px;
    }
}