/* ── Home Hero ──────────────────────────────────────── */
.home-hero {
    padding: 6rem 2rem 4.5rem;
    text-align: center;
    max-width: 50rem;
    margin: 0 auto;
}

.home-hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    color: var(--text);
    line-height: 1.1;
    margin-bottom: 1.25rem;
}

.home-hero h1 em {
    font-style: normal;
    color: var(--accent);
    background: linear-gradient(135deg, var(--accent) 30%, var(--accent-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.home-hero p {
    font-size: 1.15rem;
    color: var(--text-muted);
    line-height: 1.75;
    margin-bottom: 3rem;
}

/* ── Home Search Bar ────────────────────────────────── */
.home-search-wrapper {
    position: relative;
    max-width: 38rem;
    margin: 0 auto;
    z-index: 10;
}

.home-search-bar {
    position: relative;
    display: flex;
    align-items: center;
}

.home-search-icon {
    position: absolute;
    left: 1.25rem;
    width: 1.35rem;
    height: 1.35rem;
    color: var(--text-muted);
    pointer-events: none;
}

#homeSearchQueryInput {
    width: 100%;
    height: 3.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0 1.5rem 0 3.25rem;
    font-size: 1.05rem;
    font-family: inherit;
    color: var(--text);
    outline: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

#homeSearchQueryInput::placeholder {
    color: var(--text-dim);
}

#homeSearchQueryInput:focus {
    border-color: var(--accent);
    background: var(--surface-hover);
    box-shadow: 0 0 0 4px var(--accent-dim), 0 4px 20px rgba(0, 0, 0, 0.25);
}

/* Suggestions Dropdown for Homepage Search */
#homeNavBarContainer {
    display: none;
    position: absolute;
    top: calc(100% + 0.6rem);
    left: 0;
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    max-height: 20rem;
    overflow-y: auto;
    text-align: left;
    z-index: 100;
}

#homeNavBarContainer::-webkit-scrollbar {
    width: 4px;
}

#homeNavBarContainer::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

#homeKeywords_list {
    padding: 0.5rem;
}

/* ── Layout Grid ────────────────────────────────────── */
.home-grid-container {
    display: grid;
    grid-template-columns: 1fr 22rem;
    gap: 3.5rem;
    max-width: 76rem;
    margin: 0 auto 6rem;
    padding: 0 2rem;
}

/* ── Concept Schemes Section ────────────────────────── */
.schemes-section {
    min-width: 0; /* Prevents overflow in grids */
}

.section-heading {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.375rem;
    letter-spacing: -0.02em;
}

.section-subtext {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.schemes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(16.5rem, 1fr));
    gap: 1.5rem;
}

/* Scheme Card Design */
.scheme-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.scheme-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-accent);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.scheme-card-header h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 1.125rem;
    letter-spacing: -0.01em;
}

.scheme-card-body {
    flex: 1;
    margin-bottom: 1.5rem;
}

.concepts-label {
    font-size: 0.725rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    margin-bottom: 0.625rem;
    font-weight: 600;
}

.top-concepts-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.top-concepts-list li {
    font-size: 0.875rem;
}

.top-concepts-list a {
    color: var(--text-muted);
    transition: color var(--transition);
}

.top-concepts-list a:hover {
    color: var(--accent);
}

.scheme-card-footer {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.explore-btn {
    display: inline-flex;
    align-items: center;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
    gap: 0.375rem;
    transition: color var(--transition);
}

.arrow-icon {
    transition: transform var(--transition);
}

.explore-btn:hover {
    color: var(--accent-hover);
}

.explore-btn:hover .arrow-icon {
    transform: translateX(3px);
}

/* ── Term of the Day Sidebar ────────────────────────── */
.sidebar-section {
    position: sticky;
    top: 6.5rem;
    height: fit-content;
}

.totd-card {
    background: linear-gradient(145deg, var(--surface) 0%, rgba(26, 26, 24, 0.4) 100%);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius);
    padding: 2.25rem 1.75rem;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.totd-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent);
}

.totd-tag {
    display: inline-block;
    font-size: 0.725rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 0.25rem 0.625rem;
    border-radius: 99px;
    margin-bottom: 1.25rem;
    border: 1px solid rgba(200, 160, 80, 0.15);
}

.totd-title {
    font-size: 1.625rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.totd-notation {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 1.25rem;
}

.totd-notation code {
    font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    background: var(--surface-2);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    color: var(--text-muted);
}

.totd-description {
    font-size: 0.925rem;
    color: var(--text-muted);
    line-height: 1.65;
    margin-bottom: 2rem;
}

.totd-description.no-desc {
    font-style: italic;
    color: var(--text-dim);
}

.totd-footer {
    display: flex;
}

.totd-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    background: var(--accent);
    color: var(--bg);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.totd-btn:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: var(--bg);
    transform: translateY(-1px);
}

/* ── Responsive adjustments ─────────────────────────── */
@media (max-width: 1024px) {
    .home-grid-container {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .sidebar-section {
        position: static;
    }
}

@media (max-width: 640px) {
    .home-hero {
        padding: 4rem 1rem 3rem;
    }
    
    .home-search-icon {
        left: 1rem;
    }
    
    #homeSearchQueryInput {
        padding: 0 1rem 0 2.75rem;
        font-size: 0.95rem;
        height: 3.25rem;
    }
    
    .schemes-grid {
        grid-template-columns: 1fr;
    }
    
    .home-grid-container {
        padding: 0 1.25rem;
    }
}