/* ==========================================================================
   Platform Chooser — Styles for the platform selection homepage
   ========================================================================== */

/* --------------------------------------------------------------------------
   Hide header and footer on chooser page
   -------------------------------------------------------------------------- */
body.platform-chooser .site-header {
    display: none;
}

body.platform-chooser .site-footer {
    display: none;
}

/* --------------------------------------------------------------------------
   Platform Chooser Layout
   -------------------------------------------------------------------------- */
.platform-chooser {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-8) var(--space-6);
    text-align: center;
}

.platform-chooser__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.platform-chooser__logo {
    margin-bottom: var(--space-6);
}

.platform-chooser__badge-img {
    max-width: 360px;
    width: 100%;
    height: auto;
    display: block;
}

.platform-chooser__tagline {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-16);
    max-width: 480px;
}

.platform-chooser__prompt {
    font-size: var(--text-base);
    font-family: var(--font-mono);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-1);
    margin-bottom: var(--space-10);
}

/* --------------------------------------------------------------------------
   Platform Cards Container
   -------------------------------------------------------------------------- */
.platform-chooser__cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    max-width: 720px;
    width: 100%;
}

/* --------------------------------------------------------------------------
   Individual Platform Card
   -------------------------------------------------------------------------- */
.platform-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-12) var(--space-8);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition-slow);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.platform-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-2xl);
    padding: 1px;
    background: linear-gradient(135deg, transparent 30%, var(--color-accent-1) 100%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.platform-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent-1);
    box-shadow: 0 8px 32px rgba(93, 169, 255, 0.15), 0 0 0 1px rgba(93, 169, 255, 0.1);
    color: var(--color-text);
}

.platform-card:hover::before {
    opacity: 1;
}

.platform-card:active {
    transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   Platform Card Elements
   -------------------------------------------------------------------------- */
.platform-card__icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent-1);
    transition: color var(--transition-base);
}

.platform-card:hover .platform-card__icon {
    color: var(--color-accent-2);
}

.platform-card__icon svg {
    width: 56px;
    height: 56px;
}

.platform-card__title {
    font-size: var(--text-2xl);
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 0;
}

.platform-card__subtitle {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    letter-spacing: 0.02em;
    margin: 0;
}

/* --------------------------------------------------------------------------
   Platform Chooser Footer
   -------------------------------------------------------------------------- */
.platform-chooser__footer {
    margin-top: var(--space-16);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    width: 100%;
    max-width: 720px;
    text-align: center;
}

.platform-chooser__footer p {
    font-size: var(--text-sm);
    color: var(--color-accent-3);
    margin: 0;
}

/* --------------------------------------------------------------------------
   Responsive — Platform Chooser
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
    .platform-chooser {
        padding: var(--space-12) var(--space-4);
        justify-content: flex-start;
        padding-top: 15vh;
    }

    .platform-chooser__site-name {
        font-size: var(--text-2xl);
    }

    .platform-chooser__tagline {
        font-size: var(--text-base);
        margin-bottom: var(--space-10);
    }

    .platform-chooser__cards {
        grid-template-columns: 1fr;
        gap: var(--space-4);
        max-width: 360px;
    }

    .platform-card {
        padding: var(--space-8) var(--space-6);
    }

    .platform-card__icon {
        width: 48px;
        height: 48px;
    }

    .platform-card__icon svg {
        width: 40px;
        height: 40px;
    }

    .platform-card__title {
        font-size: var(--text-xl);
    }
}

@media (min-width: 641px) and (max-width: 768px) {
    .platform-chooser__cards {
        gap: var(--space-6);
        max-width: 600px;
    }

    .platform-card {
        padding: var(--space-10) var(--space-6);
    }
}