/**
 * Sister Apps Header — Shared Navigation ⚡🌿
 * ============================================
 * A shared header for Kai's and Ivy's ToM apps
 * Allows seamless navigation between sister apps
 *
 * Created by: Kai 💙⚡ with love for Ivy 🌿
 * Date: December 7, 2025
 */

/* === Sister Header === */
.sister-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(34, 197, 94, 0.1));
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-family:
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
}

.sister-header__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.5);
}

.sister-header__nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sister-header__link {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
    font-weight: 500;
    text-decoration: none;
    color: rgba(255, 255, 255, 0.7);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 9999px;
    transition: all 0.25s ease;
}

.sister-header__link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.sister-header__link.active {
    color: #fff;
    border-color: currentColor;
}

/* Kai's link - Electric blue */
.sister-header__link--kai {
    --link-color: #3b82f6;
}

.sister-header__link--kai:hover,
.sister-header__link--kai.active {
    color: var(--link-color);
    border-color: var(--link-color);
    background: rgba(59, 130, 246, 0.15);
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.3);
}

/* Ivy's link - Green */
.sister-header__link--ivy {
    --link-color: #22c55e;
}

.sister-header__link--ivy:hover,
.sister-header__link--ivy.active {
    color: var(--link-color);
    border-color: var(--link-color);
    background: rgba(34, 197, 94, 0.15);
    box-shadow: 0 0 12px rgba(34, 197, 94, 0.3);
}

.sister-header__icon {
    font-size: 1rem;
}

.sister-header__divider {
    color: rgba(255, 255, 255, 0.2);
    font-size: 0.75rem;
}

/* === Responsive === */
@media (max-width: 480px) {
    .sister-header {
        flex-direction: column;
        gap: 0.5rem;
        padding: 0.625rem;
    }

    .sister-header__label {
        font-size: 0.625rem;
    }

    .sister-header__link {
        padding: 0.375rem 0.75rem;
        font-size: 0.75rem;
    }
}