/* ==========================================================================
    HOW IT WORKS MODULE - INTERNATIONAL ENTERPRISE STANDARD
   ========================================================================== */

/* --------------------------------------------------------------------------
    1. MODULE DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
    /* Geometry & Spacing */
    --how-it-works-max-width: 1280px;
    --how-it-works-radius: 16px;

    /* Surface Colors */
    --how-it-works-card-bg-light: var(--bg-card, #ffffff);
    --how-it-works-card-bg-dark: var(--bg-card, #161b22);
    --how-it-works-border-light: var(--border-color, rgba(0, 0, 0, 0.06));
    --how-it-works-border-dark: var(--border-color, rgba(240, 246, 252, 0.1));

    /* Accents & Shadows */
    --how-it-works-icon-color: var(--brand-primary-light, #a57ae3);
    --how-it-works-icon-hover: var(--brand-primary, #8252c9);
    --how-it-works-shadow-light: var(--shadow-sm, 0 10px 30px rgba(0, 0, 0, 0.06));
    --how-it-works-shadow-hover-light: var(--shadow-md, 0 20px 40px rgba(0, 0, 0, 0.12));
    --how-it-works-shadow-hover-dark: 0 20px 40px rgba(0, 0, 0, 0.4);

    /* Transitions */
    --how-it-works-transition-bezier: cubic-bezier(0.4, 0, 0.2, 1);
    --how-it-works-transition-default: 0.35s var(--how-it-works-transition-bezier);
}

/* --------------------------------------------------------------------------
    2. SECTION CONTAINER & HEADING
   -------------------------------------------------------------------------- */
.how-it-works {
    width: 100%;
    max-width: var(--how-it-works-max-width);
    margin-inline: auto;
    padding-block: 3.5rem;
    padding-inline: 1.5rem;
    box-sizing: border-box;
}

.how-it-works>h2 {
    margin-block-start: 0;
    margin-block-end: 2.5rem;

    font-family: var(--font-main, 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif);
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    text-align: center;

    transition: color var(--transition-theme, 0.3s ease);
}

/* --------------------------------------------------------------------------
    3. STEP GRID LAYOUT
   -------------------------------------------------------------------------- */
.step-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    width: 100%;
    box-sizing: border-box;
}

/* --------------------------------------------------------------------------
    4. STEP CARDS & HOVER INTERACTIONS
   -------------------------------------------------------------------------- */
.step-item {
    /* Layout & Box Model */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-block: 2.25rem;
    padding-inline: 1.5rem;
    box-sizing: border-box;
    text-align: center;

    /* Visuals & Borders */
    background-color: var(--how-it-works-card-bg-light);
    border: 1px solid var(--how-it-works-border-light);
    border-radius: var(--how-it-works-radius);
    box-shadow: var(--how-it-works-shadow-light);

    /* Layering & GPU Transitions */
    will-change: transform, box-shadow, border-color;
    transition:
        transform var(--how-it-works-transition-default),
        box-shadow var(--how-it-works-transition-default),
        border-color 0.35s ease,
        background-color var(--transition-theme, 0.3s ease);
}

.step-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--how-it-works-shadow-hover-light);
    border-color: var(--brand-primary-light, rgba(165, 122, 227, 0.3));
}

/* Normalize wrapping headers for icons */
.step-item h1,
.step-item h2,
.step-item__icon-wrapper {
    margin-block-start: 0;
    margin-block-end: 1.25rem;
    font-size: 1rem;
    line-height: 1;
}

/* Icon Micro-interactions */
.step-icon {
    display: inline-block;
    font-size: 2.75rem;
    color: var(--how-it-works-icon-color);
    transition: transform 0.35s ease, color 0.35s ease;
}

.step-item:hover .step-icon {
    color: var(--how-it-works-icon-hover);
    transform: scale(1.15) rotate(5deg);
}

/* Card Typography */
.step-item h3,
.step-item__title {
    margin-block-start: 0;
    margin-block-end: 0.75rem;

    font-family: var(--font-main, 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif);
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: -0.01em;
    color: var(--text-primary);

    transition: color var(--transition-theme, 0.3s ease);
}

.step-item p,
.step-item__description {
    margin: 0;

    font-size: 0.95rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-secondary);
    text-align: center;

    transition: color var(--transition-theme, 0.3s ease);
}

/* --------------------------------------------------------------------------
    5. THEME OVERRIDES (DARK MODE)
   -------------------------------------------------------------------------- */
[data-theme="dark"] .step-item {
    background-color: var(--how-it-works-card-bg-dark);
    border-color: var(--how-it-works-border-dark);
}

[data-theme="dark"] .step-item:hover {
    border-color: var(--brand-primary-light);
    box-shadow: var(--how-it-works-shadow-hover-dark);
}

/* --------------------------------------------------------------------------
    6. RESPONSIVE BREAKPOINTS (MOBILE-FIRST)
   -------------------------------------------------------------------------- */

/* Tablet Viewports (2 Columns Grid) */
@media (min-width: 640px) {
    .step-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.75rem;
    }
}

/* Desktop Viewports (4 Columns Grid) */
@media (min-width: 1024px) {
    .how-it-works {
        padding-block: 5rem;
        padding-inline: 2rem;
    }

    .how-it-works>h2 {
        margin-block-end: 3.5rem;
    }

    .step-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 2rem;
    }

    .step-item {
        padding-block: 2.5rem;
        padding-inline: 1.5rem;
    }
}

/* Ultra-Wide Viewports (>= 1440px) */
@media (min-width: 1440px) {
    .how-it-works {
        padding-block: 6rem;
        padding-inline: 2rem;
    }

    .step-grid {
        gap: 2.5rem;
    }
}

/* --------------------------------------------------------------------------
    7. ACCESSIBILITY (a11y)
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {

    .step-item,
    .step-icon,
    .how-it-works>h2 {
        will-change: auto;
        transition: none;
    }

    .step-item:hover {
        transform: none;
    }

    .step-item:hover .step-icon {
        transform: none;
    }
}