.portfolio-container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    align-items: start;
    margin-top: 40px;
}

.portfolio-intro {
    position: sticky;
    top: 100px;
}

.intro-content {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    margin-bottom: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.intro-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px var(--shadow-hover);
}

.intro-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    animation: pulse 2s infinite;
}

.intro-content h3 {
    font-size: 1.4em;
    color: var(--text-primary);
    margin-bottom: 15px;
    font-weight: 700;
}

.intro-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 1em;
}

.portfolio-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.feature-item {
    background: var(--card-bg);
    padding: 20px 15px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.feature-item:hover {
    transform: translateY(-3px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px var(--shadow-hover);
}

.feature-icon {
    font-size: 1.5em;
    margin-bottom: 8px;
    display: block;
}

.feature-item span {
    font-size: 0.9em;
    font-weight: 600;
    color: var(--text-primary);
}

.portfolio-viewer {
    background: var(--card-bg);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    overflow: hidden;
    transition: all 0.3s ease;
}

.portfolio-viewer:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 60px var(--shadow-hover);
}

.viewer-frame {
    position: relative;
}

.frame-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.frame-controls {
    display: flex;
    gap: 8px;
}

.control-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
}

.control-dot:hover {
    transform: scale(1.2);
}

.control-dot.red {
    background: #ff5f57;
}

.control-dot.yellow {
    background: #ffbd2e;
}

.control-dot.green {
    background: #28ca42;
}

.frame-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9em;
}

.frame-actions {
    display: flex;
    gap: 10px;
}

.action-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-secondary);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.action-btn:hover {
    background: var(--accent-primary);
    color: white;
    transform: scale(1.1);
}

.iframe-container {
    position: relative;
    height: 500px;
    background: var(--bg-primary);
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: opacity 0.5s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    position: relative;
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
}

.spinner-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-top: 3px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner-ring:nth-child(2) {
    animation-delay: -0.3s;
    border-top-color: var(--accent-secondary);
}

.spinner-ring:nth-child(3) {
    animation-delay: -0.6s;
    border-top-color: var(--text-muted);
}

.loading-overlay p {
    color: var(--text-secondary);
    font-size: 0.9em;
    font-weight: 500;
}

.portfolio-iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: white;
    transition: opacity 0.5s ease;
}

.viewer-info {
    padding: 20px;
    background: var(--bg-secondary);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.info-item:hover {
    transform: translateY(-2px);
    border-color: var(--accent-primary);
}

.info-icon {
    font-size: 1.2em;
    flex-shrink: 0;
}

.info-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-content strong {
    color: var(--text-primary);
    font-size: 0.9em;
    font-weight: 600;
}

.info-content span {
    color: var(--text-muted);
    font-size: 0.8em;
    line-height: 1.4;
}

/* Animations */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .portfolio-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .portfolio-intro {
        position: static;
    }
    
    .portfolio-features {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 768px) {
    .iframe-container {
        height: 400px;
    }
    
    .frame-header {
        padding: 12px 15px;
    }
    
    .frame-title {
        font-size: 0.8em;
    }
    
    .action-btn {
        width: 28px;
        height: 28px;
    }
    
    .intro-content {
        padding: 25px 20px;
    }
    
    .intro-icon {
        width: 60px;
        height: 60px;
    }
    
    .viewer-info {
        grid-template-columns: 1fr;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .iframe-container {
        height: 350px;
    }
    
    .portfolio-features {
        grid-template-columns: 1fr;
    }
    
    .intro-content h3 {
        font-size: 1.2em;
    }
    
    .intro-content p {
        font-size: 0.9em;
    }
    
    .frame-actions {
        gap: 5px;
    }
}