/*
 * home.css — Homepage-only styles
 * All values reference CSS custom properties from :root in styles.css,
 * which are sourced from assets/tokens/design-tokens.json.
 * No hardcoded colors, font sizes, or radii.
 */

/* ── Header override: flatten shadow on homepage ─────────────────────────── */
.home-header {
    box-shadow: none;
    border-bottom: 1px solid var(--color-neutral-4);
}

/* ── Hero Section ────────────────────────────────────────────────────────── */
.home-hero {
    padding: 88px 0 72px;
    background: var(--color-neutral-1);
    text-align: center;
}

.home-hero-content {
    max-width: 660px;
    margin: 0 auto;
}

.home-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary-6);
    margin: 0 0 var(--spacing-md);
}

.home-title {
    font-size: 48px;
    line-height: 56px;
    font-weight: 600;
    color: var(--color-neutral-12);
    letter-spacing: -0.025em;
    margin: 0 0 var(--spacing-sm);
}

.home-subtitle {
    font-size: var(--font-size-h5);
    line-height: var(--line-height-h5);
    color: var(--color-neutral-7);
    margin: 0 0 40px;
    font-weight: 400;
}

/* ── Search Bar ──────────────────────────────────────────────────────────── */
.home-search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
    height: 58px;
    padding: 0 var(--spacing-lg);
    background: var(--color-neutral-1);
    border: 1.5px solid var(--color-neutral-5);
    border-radius: var(--radius-pill);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05), 0 4px 16px rgba(0, 0, 0, 0.03);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
    gap: var(--spacing-sm);
}

.home-search-wrapper:focus-within {
    border-color: var(--color-primary-6);
    box-shadow: 0 0 0 3px var(--color-primary-1), 0 4px 16px rgba(70, 95, 241, 0.08);
}

.home-search-icon {
    color: var(--color-neutral-7);
    font-size: 20px;
    flex-shrink: 0;
    transition: color var(--transition-fast);
}

.home-search-wrapper:focus-within .home-search-icon {
    color: var(--color-primary-6);
}

.home-search-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-family: var(--font-family);
    font-size: 15px;
    color: var(--color-neutral-10);
    line-height: 1;
    min-width: 0;
}

.home-search-input::placeholder {
    color: var(--color-neutral-6);
}

.home-search-clear {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: none;
    background: var(--color-neutral-5);
    color: var(--color-neutral-8);
    cursor: pointer;
    flex-shrink: 0;
    padding: 0;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.home-search-clear:hover {
    background: var(--color-neutral-6);
    color: var(--color-neutral-10);
}

.home-search-clear .material-icons {
    font-size: 13px;
}

.search-kbd {
    flex-shrink: 0;
    font-family: var(--font-family);
    font-size: 11px;
    font-weight: 500;
    color: var(--color-neutral-6);
    background: var(--color-neutral-3);
    border: 1px solid var(--color-neutral-5);
    border-radius: var(--radius-sm);
    padding: 2px 6px;
    line-height: 1.6;
    pointer-events: none;
    white-space: nowrap;
}

/* Hide ⌘K hint on mobile / when input is active */
@media (max-width: 600px) {
    .search-kbd { display: none; }
}

.home-search-wrapper:focus-within .search-kbd {
    display: none;
}

/* ── Search Results Panel ─────────────────────────────────────────────────── */
.home-results-container {
    padding: var(--spacing-xl) 0 var(--spacing-3xl);
    background: var(--color-neutral-2);
    border-top: 1px solid var(--color-neutral-4);
}

.search-results-panel {
    display: flex;
    background: var(--color-neutral-1);
    border: 1px solid var(--color-neutral-4);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.search-results-col {
    flex: 1;
    padding: var(--spacing-lg);
    min-width: 0;
}

.search-col-divider {
    width: 1px;
    background: var(--color-neutral-4);
    flex-shrink: 0;
}

.search-col-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--color-neutral-7);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-neutral-4);
}

.search-col-header .material-icons {
    font-size: 15px;
}

/* Individual result items */
.search-result-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-neutral-3);
    text-decoration: none;
    transition: padding-left var(--transition-fast);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    padding-left: var(--spacing-sm);
}

.result-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-neutral-10);
    line-height: 1.4;
    transition: color var(--transition-fast);
}

.search-result-item:hover .result-title {
    color: var(--color-primary-6);
}

.result-excerpt {
    font-size: 12px;
    color: var(--color-neutral-7);
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.result-excerpt mark {
    background: var(--color-primary-1);
    color: var(--color-primary-7);
    padding: 0 2px;
    border-radius: 2px;
    font-style: normal;
}

.results-loading,
.results-placeholder,
.no-results-text {
    font-size: 13px;
    color: var(--color-neutral-6);
    padding: var(--spacing-sm) 0;
    margin: 0;
}

.search-no-results {
    text-align: center;
    padding: var(--spacing-xl) 0;
    font-size: 14px;
    color: var(--color-neutral-7);
}

/* ── Main Content ────────────────────────────────────────────────────────── */
.home-content {
    padding: var(--spacing-3xl) 0 80px;
    background: var(--color-neutral-1);
}

/* ── Role Cards ──────────────────────────────────────────────────────────── */
.home-role-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    max-width: 860px;
    margin: 0 auto var(--spacing-3xl);
}

.home-role-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-neutral-1);
    border: 1px solid var(--color-neutral-4);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    transition: border-color var(--transition-normal),
                box-shadow var(--transition-normal),
                transform var(--transition-fast);
}

.home-role-card:hover {
    border-color: var(--color-primary-6);
    box-shadow: 0 4px 20px rgba(70, 95, 241, 0.09);
    transform: translateY(-2px);
}

.role-card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.role-card-icon.participant-icon {
    background: var(--color-participant-bg);
    color: var(--color-participant);
}

.role-card-icon.researcher-icon {
    background: var(--color-researcher-bg);
    color: var(--color-researcher);
}

.role-card-icon .material-icons {
    font-size: 20px;
}

.role-card-body {
    flex: 1;
    min-width: 0;
}

.role-card-body h2 {
    font-size: var(--font-size-h5);
    font-weight: 600;
    color: var(--color-neutral-10);
    margin: 0 0 2px;
    line-height: 1.35;
}

.role-card-body p {
    font-size: 12px;
    color: var(--color-neutral-7);
    margin: 0;
    line-height: 1.5;
}

.role-card-arrow {
    color: var(--color-neutral-5);
    font-size: 18px;
    flex-shrink: 0;
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.home-role-card:hover .role-card-arrow {
    color: var(--color-primary-6);
    transform: translateX(3px);
}

/* ── Popular Topics ──────────────────────────────────────────────────────── */
.home-topics-section {
    max-width: 860px;
    margin: 0 auto;
}

.home-section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--color-neutral-7);
    margin: 0 0 var(--spacing-md);
    /* override global h3 sizing */
    font-size: 11px !important;
    line-height: 1.5 !important;
}

.home-topics-groups {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.home-topics-group-label {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: var(--radius-pill);
    margin-bottom: var(--spacing-md);
}

.home-topics-group-label .material-icons {
    font-size: 13px;
}

.home-topics-group-label--participant {
    background: var(--color-participant-bg);
    color: var(--color-participant);
}

.home-topics-group-label--researcher {
    background: var(--color-researcher-bg);
    color: var(--color-researcher);
}

.home-topics-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.topic-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-neutral-3);
    border: 1px solid var(--color-neutral-4);
    border-radius: var(--radius-pill);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-neutral-8);
    text-decoration: none;
    transition: background var(--transition-fast),
                border-color var(--transition-fast),
                color var(--transition-fast),
                transform var(--transition-fast);
}

.topic-chip .material-icons {
    font-size: 15px;
    color: var(--color-neutral-6);
    transition: color var(--transition-fast);
}

.topic-chip:hover {
    background: var(--color-primary-1);
    border-color: var(--color-primary-3);
    color: var(--color-primary-6);
    transform: translateY(-1px);
}

.topic-chip:hover .material-icons {
    color: var(--color-primary-5);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .home-hero {
        padding: 56px 0 48px;
    }

    .home-title {
        font-size: 34px;
        line-height: 42px;
    }

    .home-search-wrapper {
        height: 52px;
        padding: 0 var(--spacing-md);
    }

    .home-role-grid {
        grid-template-columns: 1fr;
        margin-bottom: var(--spacing-2xl);
    }

    .home-topics-groups {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .search-results-panel {
        flex-direction: column;
    }

    .search-col-divider {
        width: 100%;
        height: 1px;
    }

    .home-content {
        padding: var(--spacing-2xl) 0 56px;
    }
}

@media (max-width: 480px) {
    .home-title {
        font-size: 28px;
        line-height: 36px;
    }

    .home-search-wrapper {
        height: 48px;
        padding: 0 var(--spacing-md);
    }

    .home-search-input {
        font-size: 14px;
    }

    .home-role-card {
        padding: var(--spacing-md);
    }
}