/* --- Neutral Theme Variables Mapping --- */
:root {
    --rm-background: #09090b;
    --rm-surface: #18181b;
    --rm-card: #202024;
    --rm-border: rgba(255, 255, 255, 0.05);
    --rm-text: #f8fafc;
    --rm-muted: #94a3b8;
    --rm-accent: #2563eb;
    --rm-accent-hover: #1d4ed8;
    --rm-accent-alpha: rgba(37, 99, 235, 0.1);
}

html[data-theme="light"] {
    --rm-background: #fafafa;
    --rm-surface: #ffffff;
    --rm-card: #f4f4f5;
    --rm-border: rgba(0, 0, 0, 0.08);
    --rm-text: #09090b;
    --rm-muted: #71717a;
    --rm-accent: #2563eb;
    --rm-accent-hover: #1d4ed8;
    --rm-accent-alpha: rgba(37, 99, 235, 0.05);
}

.roadmap-container {
    padding: 60px 0;
    background: var(--rm-background);
    color: var(--rm-text);
    min-height: 100vh;
}

.roadmap-header {
    text-align: center;
    margin-bottom: 50px;
}

.roadmap-header h1 {
    font-size: 42px;
    font-weight: 700;
    color: var(--rm-text);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.roadmap-header p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--rm-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Filters and Search Bar Section */
.roadmap-filter-section {
    background: var(--rm-surface);
    border: 1px solid var(--rm-border);
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 40px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
}

.roadmap-search-box {
    position: relative;
    flex-grow: 1;
    min-width: 250px;
}

.roadmap-search-box input {
    width: 100%;
    background: var(--rm-card);
    border: 1px solid var(--rm-border);
    color: var(--rm-text);
    padding: 12px 16px 12px 45px;
    border-radius: 8px;
    font-size: 15px;
    outline: none;
    transition: all 0.2s ease;
}

.roadmap-search-box input:focus {
    border-color: var(--rm-accent);
}

.roadmap-search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--rm-muted);
    font-size: 1rem;
}

.roadmap-filters-wrap {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.roadmap-filter-select {
    background: var(--rm-card);
    border: 1px solid var(--rm-border);
    color: var(--rm-text);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.roadmap-filter-select:focus {
    border-color: var(--rm-accent);
}

.roadmap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

/* Responsive Filters */
@media (max-width: 576px) {
    .roadmap-filter-section {
        flex-direction: column;
        align-items: stretch;
        padding: 16px;
        gap: 12px;
    }
    
    .roadmap-search-box {
        width: 100%;
        min-width: 100%;
    }
    
    .roadmap-filters-wrap {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .roadmap-filter-select {
        width: 100%;
        padding: 12px 10px;
        font-size: 13px;
    }

    .roadmap-filters-wrap .btn-roadmap-outline {
        grid-column: span 2;
        width: 100%;
        text-align: center;
        justify-content: center;
        display: inline-flex;
        align-items: center;
        min-height: 45px;
    }
}

@media (max-width: 400px) {
    .roadmap-filters-wrap {
        grid-template-columns: 1fr;
    }
    .roadmap-filters-wrap .btn-roadmap-outline {
        grid-column: span 1;
    }
}