/* =========================
   Minimal Module Cards
   ========================= */

.modules-section {
    grid-area: modules;
    width: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0;
    animation: slideUp var(--transition-slow) 0.15s both;
}

/* Module Cards Container */
.module-cards {
    display: grid;
    /* Default: 4 columns for desktop */
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(10px, 2vw, 12px);
    width: 100%;
    box-sizing: border-box;
}

/* Individual Module Card */
.module-card {
    position: relative;
    background: var(--bg-input);
    border: 1px solid rgba(74, 222, 128, 0.2);
    border-radius: 8px;
    padding: clamp(12px, 3vw, 16px) clamp(6px, 2vw, 8px);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    overflow: visible;
    min-width: 0;
    aspect-ratio: 1 / 1.15;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.module-card:hover {
    border-color: var(--green-primary);
    background: rgba(74, 222, 128, 0.1);
    box-shadow: 0 0 15px rgba(74, 222, 128, 0.3);
}

/* Module Icon */
.module-icon {
    width: clamp(28px, 6vw, 40px);
    height: clamp(28px, 6vw, 40px);
    margin-bottom: clamp(8px, 2vw, 16px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.module-icon .phantom-icon {
    width: 100%;
    height: 100%;
    color: var(--green-primary);
    fill: currentColor;
    transition: all var(--transition-fast);
}

/* Module Label */
.module-label {
    font-family: var(--font-mono), monospace;
    font-size: clamp(13px, 2.8vw, 18px);
    font-weight: 700;
    color: var(--green-primary);
    margin-bottom: 4px;
    letter-spacing: 1px;
    line-height: 1.2;
}

/* Module Mini Description */
.module-mini-desc {
    font-size: clamp(10px, 2vw, 13px);
    font-weight: 400;
    color: var(--text-secondary);
    opacity: 0.85;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.3;
}

/* Hover Information Popup */
.module-hover-info {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) scale(0.95);
    margin-top: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--green-primary);
    border-radius: 8px;
    padding: 12px;
    width: 220px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    z-index: 100;
    pointer-events: none;
}

.module-card:hover .module-hover-info {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) scale(1);
    pointer-events: auto;
}

/* Arrow pointer */
.module-hover-info::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    width: 12px;
    height: 12px;
    background: var(--bg-primary);
    border-top: 1px solid var(--green-primary);
    border-left: 1px solid var(--green-primary);
    transform: translateX(-50%) rotate(45deg);
}

/* Module Diagram Thumbnail */
.module-diagram-thumb {
    width: 100%;
    height: 60px;
    object-fit: contain;
    border-radius: 4px;
    margin-bottom: 10px;
    background: rgba(15, 23, 42, 0.6);
    padding: 4px;
}

/* Module Details */
.module-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-align: left;
}

.module-details strong {
    font-family: var(--font-mono), monospace;
    font-size: 12px;
    color: var(--green-primary);
    margin-bottom: 4px;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(74, 222, 128, 0.2);
}

.module-details span {
    font-size: 11px;
    color: var(--text-primary);
    padding-left: 8px;
    opacity: 0.9;
}

/* Active/Selected State */
.module-card.active {
    background: rgba(74, 222, 128, 0.15);
    border-color: var(--green-primary);
    box-shadow: 0 0 20px rgba(74, 222, 128, 0.3);
}

.module-card.active .module-icon {
    color: var(--green-primary);
    filter: drop-shadow(0 0 8px rgba(74, 222, 128, 0.6));
}

/* Position adjustments for edge cards */
.module-card:nth-child(1) .module-hover-info {
    left: 0;
    transform: translateX(0) scale(0.95);
}

.module-card:nth-child(1):hover .module-hover-info {
    transform: translateX(0) scale(1);
}

.module-card:nth-child(4) .module-hover-info {
    left: auto;
    right: 0;
    transform: translateX(0) scale(0.95);
}

.module-card:nth-child(4):hover .module-hover-info {
    transform: translateX(0) scale(1);
}

/* Touch Device Support */
@media (hover: none) and (pointer: coarse) {
    /* Disable hover effects on touch devices */
    .module-card:hover {
        background: var(--bg-input);
        box-shadow: none;
    }

    /* Hide hover info on touch devices */
    .module-hover-info {
        display: none !important;
    }
}

/* Loading animation for module cards */
@keyframes moduleCardLoad {
    from {
        opacity: 0;
        transform: translateY(10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.module-card {
    animation: moduleCardLoad 0.4s ease-out backwards;
}

.module-card:nth-child(1) { animation-delay: 0.1s; }
.module-card:nth-child(2) { animation-delay: 0.15s; }
.module-card:nth-child(3) { animation-delay: 0.2s; }
.module-card:nth-child(4) { animation-delay: 0.25s; }

/* =========================
   Responsive Grid System
   ========================= */

/* Tablet: 2 columns (480px - 767px) */
@media (max-width: 767px) {
    .module-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Adjust hover info position for 2-column layout */
    .module-card:nth-child(odd) .module-hover-info {
        left: 0;
        transform: translateX(0) scale(0.95);
    }

    .module-card:nth-child(odd):hover .module-hover-info {
        transform: translateX(0) scale(1);
    }

    .module-card:nth-child(even) .module-hover-info {
        left: auto;
        right: 0;
        transform: translateX(0) scale(0.95);
    }

    .module-card:nth-child(even):hover .module-hover-info {
        transform: translateX(0) scale(1);
    }
}

/* Mobile: Keep 2 columns even on smallest screens */
@media (max-width: 479px) {
    .module-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: clamp(8px, 1.5vw, 10px);
    }

    /* Reduce card height on mobile */
    .module-card {
        aspect-ratio: 1 / 1.05;
        padding: clamp(12px, 3vw, 16px) clamp(8px, 2vw, 10px);
    }

    /* Much larger icons for mobile - dominant visual element */
    .module-icon {
        width: clamp(36px, 9vw, 44px);
        height: clamp(36px, 9vw, 44px);
        margin-bottom: clamp(8px, 2vw, 12px);
    }

    /* Larger, bolder text for mobile readability */
    .module-label {
        font-size: clamp(15px, 3.5vw, 18px);
        font-weight: 700;
        margin-bottom: 4px;
        letter-spacing: 0;
    }

    .module-mini-desc {
        font-size: clamp(11px, 2.5vw, 13px);
        opacity: 0.9;
        font-weight: 400;
    }

    /* Adjust hover info for mobile 2-column */
    .module-card:nth-child(odd) .module-hover-info {
        left: 0;
        transform: translateX(0) scale(0.95);
    }

    .module-card:nth-child(odd):hover .module-hover-info {
        transform: translateX(0) scale(1);
    }

    .module-card:nth-child(even) .module-hover-info {
        left: auto;
        right: 0;
        transform: translateX(0) scale(0.95);
    }

    .module-card:nth-child(even):hover .module-hover-info {
        transform: translateX(0) scale(1);
    }
}