/* ============================================
   PORTFOLIO - PROJECTS PAGE
   Module 8: filter bar, cards, cover zoom, tags
   Loaded only on the projects page.
   ============================================ */

/* ----------------------------------------
   1. FILTER BAR
   ---------------------------------------- */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-7);
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1.15rem;
    border-radius: var(--radius-pill);
    border: var(--border-width) solid var(--surface-border);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    transition: all var(--transition-base), transform var(--transition-spring);
    cursor: pointer;
}

.filter-btn .count {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--text-muted);
    background: var(--bg-surface);
    border-radius: var(--radius-pill);
    padding: 0.1rem 0.5rem;
    transition: inherit;
}

.filter-btn:hover {
    color: var(--text-primary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.filter-btn.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    box-shadow: var(--shadow-primary);
}

.filter-btn.active .count {
    color: #fff;
    background: rgba(255, 255, 255, 0.18);
}

/* ----------------------------------------
   2. PROJECT CARD
   ---------------------------------------- */
.proj-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: opacity 0.35s var(--ease-out), transform 0.35s var(--ease-out);
}

.proj-card.is-hidden {
    opacity: 0;
    transform: scale(0.92);
    pointer-events: none;
}

/* Wins over .reveal.revealed so filter fade-out still animates */
.proj-card.revealed.is-hidden {
    opacity: 0;
    transform: scale(0.92);
}

.proj-card.is-off {
    display: none;
}

/* ---- Cover ---- */
.proj-cover {
    position: relative;
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: linear-gradient(135deg, color-mix(in srgb, var(--proj-color) 34%, var(--bg-card)), var(--bg-card-hover));
    margin-bottom: var(--space-4);
    box-shadow: var(--shadow-sm);
}

.proj-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease-out), filter 0.6s var(--ease-out);
}

.proj-card:hover .proj-cover img {
    transform: scale(1.08);
    filter: brightness(1.05);
}

/* Shine sweep across the cover on hover */
.proj-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, 0.32) 48%, transparent 62%);
    transform: translateX(-120%);
    transition: transform 0.8s var(--ease-out);
    pointer-events: none;
}

.proj-card:hover .proj-cover::after {
    transform: translateX(120%);
}

/* Icon placeholder when no image is set yet */
.proj-placeholder-icon {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.2rem;
    color: var(--proj-color);
    text-shadow: 0 6px 24px color-mix(in srgb, var(--proj-color) 40%, transparent);
    transition: transform 0.6s var(--ease-out);
}

.proj-card:hover .proj-placeholder-icon {
    transform: scale(1.15) rotate(-6deg);
}

/* Decorative floating orbs on the cover */
.proj-orb {
    position: absolute;
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: radial-gradient(circle, color-mix(in srgb, var(--proj-color) 45%, transparent) 0%, transparent 70%);
    pointer-events: none;
}

.proj-orb.orb-a { top: -24px; right: -14px; width: 130px; height: 130px; }
.proj-orb.orb-b { bottom: -30px; left: -10px; width: 110px; height: 110px; opacity: 0.8; }

/* ---- Body ---- */
.proj-body {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.proj-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-bottom: var(--space-3);
}

.proj-tag {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--proj-color);
    background: color-mix(in srgb, var(--proj-color) 14%, var(--bg-card));
    border: 1px solid color-mix(in srgb, var(--proj-color) 30%, transparent);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.proj-card:hover .proj-tag {
    background: color-mix(in srgb, var(--proj-color) 22%, var(--bg-card));
}

.proj-body .card-title {
    margin-bottom: var(--space-2);
    transition: color var(--transition-fast);
}

.proj-body .card-title a {
    color: inherit;
}

.proj-body .card-title a:hover {
    color: var(--primary-light);
}

.proj-body .card-text {
    font-size: var(--fs-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-4);
}

/* ---- Links ---- */
.proj-links {
    margin-top: auto;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding-top: var(--space-3);
    border-top: var(--border-width) dashed var(--surface-border);
}

.proj-links .btn {
    padding: 0.45rem 1rem;
    font-size: var(--fs-sm);
}

.proj-icon-link {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: var(--border-width) solid var(--surface-border);
    color: var(--text-secondary);
    background: var(--bg-card);
    transition: all var(--transition-base);
}

.proj-icon-link:hover {
    color: #fff;
    background: var(--gradient-primary);
    border-color: transparent;
    box-shadow: var(--shadow-primary);
    transform: translateY(-2px);
}

.proj-icon-link i {
    font-size: var(--fs-md);
}

/* ----------------------------------------
   3. SKELETONS, NOTICES & LOADING
   ---------------------------------------- */
.proj-skeleton {
    overflow: hidden;
}

.skeleton-block,
.skeleton-line {
    border-radius: var(--radius-md);
    background: linear-gradient(
        100deg,
        var(--bg-surface) 30%,
        var(--bg-card-hover) 50%,
        var(--bg-surface) 70%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.4s linear infinite;
}

.skeleton-block {
    aspect-ratio: 16 / 9;
    margin-bottom: var(--space-4);
}

.skeleton-line {
    height: 0.9rem;
    margin-bottom: 0.65rem;
}

@keyframes skeleton-shimmer {
    0%   { background-position: 130% 0; }
    100% { background-position: -70% 0; }
}

.project-notice {
    display: flex;
    justify-content: center;
    margin-top: var(--space-5);
}

.project-notice-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    max-width: 460px;
    padding: var(--space-5) var(--space-6);
    text-align: center;
    border: var(--border-width) dashed var(--surface-border);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    color: var(--text-secondary);
}

.project-notice-icon {
    font-size: 2rem;
}

.project-notice.is-error .project-notice-icon { color: var(--danger, #ff6b6b); }
.project-notice.is-fallback .project-notice-icon { color: var(--primary-light); }
.project-notice.is-empty .project-notice-icon { color: var(--text-muted); }
.project-notice.is-loading .project-notice-icon { color: var(--primary-light); animation: spin 1s linear infinite; }

.project-notice-text {
    margin: 0;
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
}

.project-notice.is-loading .project-notice-text { color: var(--text-secondary); }

.project-notice-sub {
    margin: 0;
    font-size: var(--fs-sm);
    color: var(--text-muted);
}

.project-retry {
    margin-top: var(--space-1);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ----------------------------------------
   4. RESPONSIVE
   ---------------------------------------- */
@media (max-width: 575.98px) {
    .filter-btn {
        padding: 0.45rem 0.9rem;
        font-size: var(--fs-xs);
    }

    .proj-placeholder-icon {
        font-size: 2.6rem;
    }
}

/* ----------------------------------------
   5. REDUCED MOTION
   ---------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    .proj-cover img,
    .proj-cover::after,
    .proj-placeholder-icon,
    .proj-card {
        transition: none;
    }

    .skeleton-block,
    .skeleton-line {
        animation: none;
    }

    .project-notice-inner {
        transition: none;
    }
}