.how-it-works-section {
    padding: var(--spacing-3xl) var(--spacing-xl);
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
    position: relative;
    transition: background 0.3s ease;
}

[data-theme="light"] .how-it-works-section {
    background: linear-gradient(180deg, var(--color-bg-tertiary) 0%, var(--color-bg) 100%);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent-primary) 50%, var(--color-accent-tertiary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0;
    transform: scale(0.8) translateY(-30px) rotateX(-90deg);
    transition: all 0.3s ease;
    transform-style: preserve-3d;
    transform-origin: center center;
}

.how-it-works {
    max-width: 1200px;
    margin: 0 auto;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    position: relative;
}

.steps-container::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(0, 212, 255, 0.35) 15%, rgba(102, 126, 234, 0.35) 85%, transparent 100%);
    transform: translateY(-50%);
    z-index: 0;
    pointer-events: none;
}

.step-node {
    position: absolute;
    top: 50%;
    right: -10px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 2px solid var(--color-accent-tertiary);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
    transform: translateY(-50%);
    z-index: 3;
}

.step-card:last-child .step-node {
    display: none;
}

.step-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xl);
    box-shadow: 
        0 4px 6px rgba(0, 0, 0, 0.1),
        0 2px 4px rgba(0, 0, 0, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 1px solid var(--color-border);
    position: relative;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), 
                box-shadow 0.4s ease, 
                border-color 0.4s ease,
                background 0.4s ease;
    overflow: hidden;
    transform-style: preserve-3d;
    /* Initial state - will be animated by GSAP */
    opacity: 0;
    transform: scale(0.5) rotateY(-45deg);
}

.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: var(--grid-bg);
    background-size: 28px 28px;
    opacity: 0.18;
    pointer-events: none;
    z-index: 0;
}

.step-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent-primary) 0%, var(--color-accent-secondary) 50%, var(--color-accent-tertiary) 100%);
    border-radius: var(--border-radius-xl) var(--border-radius-xl) 0 0;
    transition: background 0.3s ease;
    z-index: 1;
}

.step-card > * {
    position: relative;
    z-index: 2;
}

[data-theme="light"] .step-card {
    box-shadow: var(--shadow-lg);
}

.step-card:hover {
    transform: translateY(-6px) scale(1.02) rotateY(2deg);
    box-shadow:
        0 18px 28px rgba(0, 0, 0, 0.18),
        0 10px 14px rgba(0, 0, 0, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        0 0 30px rgba(102, 126, 234, 0.25);
    border-color: var(--color-accent-tertiary);
    background: var(--color-bg-card-hover);
    border-width: 1px;
}

.step-card:hover .step-number {
    opacity: 0.4;
    transform: scale(1.1);
}

.step-card:hover .step-title {
    transform: translateX(5px);
    color: var(--color-accent-primary);
}

.step-number {
    font-size: 4rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-accent-primary) 0%, var(--color-accent-tertiary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-md);
    opacity: 0.2;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    transform-origin: center center;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
    transform: translateX(0);
}

[data-theme="dark"] .step-title {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    color: #e8eaf6;
}

.step-description {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    transition: color 0.3s ease;
    text-shadow: 0 1px 1px rgba(255, 255, 255, 0.6);
}

[data-theme="dark"] .step-description {
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
    color: #b0bec5;
}

.step-highlight {
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(0, 212, 255, 0.08) 100%);
    border-radius: var(--border-radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-accent-primary);
    display: inline-block;
    border-left: 3px solid var(--color-accent-primary);
    transition: all 0.3s ease;
}

[data-theme="light"] .step-highlight {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.06) 0%, rgba(0, 188, 212, 0.04) 100%);
}

.how-it-works-intro {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    text-align: center;
    font-size: clamp(1rem, 2vw, 1.1rem);
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.step-technical {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-sm);
    font-family: 'Courier New', monospace;
}

.step-technical strong {
    color: var(--color-text-primary);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.technical-details {
    margin-top: var(--spacing-3xl);
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border-radius: var(--border-radius-xl);
    border: 1px solid var(--color-border);
}

.technical-details h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
    text-align: center;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.tech-item {
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border);
    font-size: 0.9rem;
    line-height: 1.6;
}

.tech-item strong {
    color: var(--color-accent-primary);
    display: block;
    margin-bottom: var(--spacing-xs);
}

@media (max-width: 768px) {
    .how-it-works-section {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: var(--spacing-xl);
    }

    .steps-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .steps-container::before,
    .step-node {
        display: none;
    }
}