/* Projects section: category switcher, cards, embedded frames and controls */

.projects {
    padding: 4rem 0;
    background: rgba(10, 10, 10, 0.95);
}

.projects h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--matrix-color);
    text-transform: uppercase;
    letter-spacing: 3px;
}

.category-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    gap: 10px;
}

.category-btn {
    --hover-bg: #81ffca;
    --hover-text: #000;
    --shadow-color: var(--matrix-color);
    color: #fff;
    cursor: pointer;
    border: 1px solid var(--bg);
    border-radius: 4px;
    padding: 0.8em 2em;
    background: var(--bg);
    transition: 0.2s;
}

.category-btn:hover {
    color: var(--hover-text);
    transform: translate(-0.25rem, -0.25rem);
    background: var(--hover-bg);
    box-shadow: 0.25rem 0.25rem var(--shadow-color);
}

.category-btn:active {
    transform: translate(0);
    box-shadow: none;
}

.category-btn.active {
    background: var(--matrix-color);
    color: var(--bg-color);
    border-color: var(--matrix-color);
}

/* Each category renders as a vertical stack of cards */
.project-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    width: 100%;
    background: rgba(20, 20, 20, 0.95);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid rgba(0, 255, 149, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 20px rgba(0, 255, 149, 0.2);
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    color: var(--matrix-color);
    margin-bottom: 0.5rem;
}

.project-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px 8px 0 0;
}

/* Embedded interactive project (iframe) */
.project-frame {
    margin: 1rem 0;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    overflow: hidden;
}

.project-frame iframe {
    border: 1px solid var(--matrix-color);
    border-radius: 8px;
}

.project-controls {
    margin: 1rem 0;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.toggle-project {
    min-width: 150px;
}

/* Runtime controls for interactive projects */
.variable-controls {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
}

.variable-controls h4 {
    color: var(--matrix-color);
    margin-bottom: 1rem;
}

.control-group {
    margin-bottom: 1rem;
}

.control-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.control-group input {
    background: rgba(0, 255, 149, 0.1);
    border: 1px solid var(--matrix-color);
    color: var(--text-color);
    padding: 0.5rem;
    border-radius: 4px;
    width: 100%;
}

.value-display {
    text-align: right;
    font-size: 0.8rem;
    color: var(--text-color);
}