/* ========== PROJECTS ========== */
.projects-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.filter-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.6rem 1.25rem;
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.filter-btn:hover {
    border-color: var(--border-bright);
    color: #ffffff;
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #000000;
    font-weight: 800;
    box-shadow: 0 4px 18px var(--color-primary-glow);
}

/* ========== PROJECTS ========== */
.projects-stack {
    display: flex;
    flex-direction: column;
    gap: 2.25rem;
}

.project-card {
    background: rgba(8, 10, 14, 0.88);
    border: 1px solid var(--border-subtle);
    border-radius: 18px;
    padding: 2.25rem;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    backdrop-filter: blur(18px);
    overflow: hidden;
    will-change: transform;
}

.project-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0%;
    background: linear-gradient(180deg, #ffffff, #666666);
    transition: height 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    border-radius: 4px 0 0 4px;
}

.project-card:hover {
    border-color: var(--border-bright);
    background: rgba(20, 20, 20, 0.96);
    box-shadow: 0 30px 55px rgba(0, 0, 0, 0.8), 0 0 35px rgba(255, 255, 255, 0.15);
    transform: translateY(-8px);
}

.project-card:hover::after {
    height: 100%;
}

.project-visual {
    position: relative;
    width: 100%;
    height: 260px;
    background: #05070a;
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    margin-bottom: 1.75rem;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.4s, box-shadow 0.4s;
}

.project-card:hover .project-visual {
    border-color: var(--border-bright);
    box-shadow: 0 10px 30px rgba(6, 182, 212, 0.22);
}

.project-visual-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    filter: brightness(0.92) contrast(1.05);
    transition: transform 0.65s cubic-bezier(0.23, 1, 0.32, 1), filter 0.65s;
    will-change: transform;
}

.project-card:hover .project-visual-img {
    transform: scale(1.06);
    filter: brightness(1.05) contrast(1.12);
}

.project-visual-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
    opacity: 0.85;
}

.project-visual-badge {
    position: absolute;
    bottom: 12px;
    left: 14px;
    z-index: 3;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--color-primary);
    background: rgba(3, 4, 6, 0.82);
    border: 1px solid rgba(6, 182, 212, 0.35);
    backdrop-filter: blur(12px);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.6);
}

.project-top-meta {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.02em;
    margin-bottom: 0.35rem;
}

.project-category-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

.project-period {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dim);
    background: rgba(255, 255, 255, 0.05);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
}

.project-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.achievement-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 1.75rem;
}

.achievement-item {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    font-size: 0.88rem;
    color: #d1d5db;
}

.achievement-item::before {
    content: '→';
    color: var(--color-primary);
    font-family: var(--font-mono);
    font-weight: bold;
}

.tech-badge-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.badge-info {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    padding: 0.3rem 0.75rem;
    border-radius: 6px;
    transition: all 0.25s ease;
}

.project-card:hover .badge-info {
    border-color: rgba(6, 182, 212, 0.38);
    background: rgba(6, 182, 212, 0.08);
    color: #ffffff;
}

.expand-details-btn {
    background: none;
    border: 1px solid var(--border-bright);
    color: #ffffff;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.65rem 1.25rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.expand-details-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(6, 182, 212, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(6, 182, 212, 0.25);
}

.details-drawer {
    display: none;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--border-subtle);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: #9ca3af;
    line-height: 1.8;
    white-space: pre-line;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.details-drawer.open {
    display: block;
    opacity: 1;
    animation: drawerOpen 0.45s cubic-bezier(0.23, 1, 0.32, 1);
}

@keyframes drawerOpen {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}