/* ========================================
   COMPONENTS
   Phase 2: Premium UI elements
   ======================================== */

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all var(--transition-base);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--charcoal);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-strong);
}

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

.btn-secondary {
    background-color: transparent;
    border-color: var(--accent-teal);
    color: var(--accent-teal);
}

.btn-secondary:hover {
    background-color: var(--accent-teal-muted);
    box-shadow: var(--shadow-glow);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ===== CARDS ===== */
.card {
    background: var(--gradient-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
            transparent 0%,
            var(--accent-teal) 50%,
            transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--border-medium);
    box-shadow: var(--shadow-lg);
}

.card:hover::before {
    opacity: 0.5;
}

.card-image {
    background: linear-gradient(135deg, var(--forest-dark) 0%, var(--charcoal-lighter) 100%);
    aspect-ratio: 16 / 10;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-md);
}

/* Grain texture overlay for image cards */
.card-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.03;
    mix-blend-mode: overlay;
    pointer-events: none;
    z-index: 1;
}

.card-image img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: center;
}

.card-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-sm);
    font-weight: 700;
}

.card-meta {
    font-size: var(--text-xs);
    color: var(--accent-teal);
    margin-bottom: var(--space-lg);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

/* ===== GRID SYSTEM ===== */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
}

@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xl);
    }
}

@media (max-width: 600px) {
    .grid-3 {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

/* ===== BADGES/TAGS ===== */
.tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: linear-gradient(135deg, var(--accent-teal-muted), var(--accent-lime-muted));
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-right: var(--space-sm);
    color: var(--accent-teal);
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: var(--space-xl);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-input,
.form-textarea {
    width: 100%;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    padding: var(--space-md) var(--space-lg);
    color: var(--white);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-teal);
    background-color: rgba(255, 255, 255, 0.06);
    box-shadow: 0 0 0 3px var(--accent-teal-muted);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== FILTER CONTROLS ===== */
.filter-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    margin-bottom: var(--space-3xl);
}

.filter-btn {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-xs);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.filter-btn.active {
    background: var(--gradient-accent);
    color: var(--charcoal);
    border-color: transparent;
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 640px) {
    .card-image {
        aspect-ratio: 4 / 3;
    }
}