/* =============================================================================
   Projects Section
   ============================================================================= */

.projects {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-24) var(--space-8) var(--space-24);
    min-height: 100vh;
}

/* Header */
.projects__header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.projects__title {
    font-size: clamp(1.75rem, 6vw, 3.5rem);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

.projects__subtitle {
    font-size: clamp(0.875rem, 2.5vw, 1.25rem);
    color: var(--color-text-secondary);
}

/* Filters */
.projects__filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-12);
}

.filter-btn {
    position: relative;
    padding: var(--space-2) var(--space-5);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    cursor: pointer;
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: 
        background var(--transition-normal),
        color var(--transition-normal),
        border-color var(--transition-normal),
        transform var(--transition-normal),
        box-shadow var(--transition-normal);
}

.filter-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--color-accent);
    transform: translate(-50%, -50%);
    transition: 
        width 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.2;
    z-index: 0;
}

.filter-btn span {
    position: relative;
    z-index: 1;
}

.filter-btn:hover:not(.filter-btn--active) {
    border-color: var(--color-border-hover);
    color: var(--color-text-primary);
    transform: translateY(-2px);
}

.filter-btn--active {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(10, 132, 255, 0.3);
}

.filter-btn--active::before {
    width: 200%;
    height: 200%;
}

.filter-btn:active {
    transform: translateY(0);
}

/* Grid */
.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-5);
}

/* Card */
.project-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    cursor: pointer;
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    transition: 
        transform var(--transition-normal),
        border-color var(--transition-normal),
        box-shadow var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-lg), 0 0 24px var(--color-glow);
}

.project-card__content {
    padding: var(--space-6);
}

.project-card__icon {
    width: 44px;
    height: 44px;
    margin-bottom: var(--space-4);
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
}

/* Icon variants */
.project-card__icon--python { background-image: url('../../assets/icons/python.png'); }
.project-card__icon--java { background-image: url('../../assets/icons/java.png'); }
.project-card__icon--html { background-image: url('../../assets/icons/web.png'); }
.project-card__icon--mockito { background-image: url('../../assets/icons/mockito.png'); }
.project-card__icon--security { background-image: url('../../assets/icons/muaddib.png'); }
.project-card__icon--games { background-image: url('../../assets/icons/musubi.png'); }

.project-card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-2);
    color: var(--color-text-primary);
}

.project-card__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
}

/* Empty State */
.projects__empty {
    text-align: center;
    padding: var(--space-20) var(--space-6);
    grid-column: 1 / -1;
}

.projects__empty-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-3);
    color: var(--color-text-primary);
}

.projects__empty-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}