/* ==========================================================================
   COMPONENTS — Reusable UI Elements
   ========================================================================== */

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 0.75rem 1.75rem;
    font-family: var(--font-body);
    font-size: var(--text-small);
    font-weight: var(--weight-semibold);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    line-height: 1;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    min-height: 44px;
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: 3px;
}

.btn--primary {
    background-color: var(--color-navy);
    color: var(--color-white);
    border-color: var(--color-navy);
}

.btn--primary:hover {
    background-color: var(--color-navy-light);
    border-color: var(--color-navy-light);
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-navy);
    border-color: var(--color-navy);
}

.btn--secondary:hover {
    background-color: var(--color-navy);
    color: var(--color-white);
}

.btn--gold {
    background-color: var(--color-gold);
    color: var(--color-white);
    border-color: var(--color-gold);
}

.btn--gold:hover {
    background-color: var(--color-gold-dark);
    border-color: var(--color-gold-dark);
}

.btn--white {
    background-color: var(--color-white);
    color: var(--color-navy);
    border-color: var(--color-white);
}

.btn--white:hover {
    background-color: var(--color-offwhite);
}

.btn--ghost-white {
    background-color: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn--ghost-white:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--color-white);
}

.btn--sm {
    padding: 0.5rem 1.25rem;
    font-size: var(--text-xs);
    min-height: 36px;
}

.btn--lg {
    padding: 1rem 2.25rem;
    font-size: var(--text-small);
}

.btn:disabled,
.btn[aria-disabled="true"] {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ── Breadcrumb ── */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--text-xs);
    color: var(--color-muted);
    padding: var(--space-md) 0;
}

.breadcrumb__link {
    color: var(--color-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb__link:hover {
    color: var(--color-navy);
}

.breadcrumb__sep {
    color: var(--color-border);
    user-select: none;
}

.breadcrumb__current {
    color: var(--color-text);
    font-weight: var(--weight-medium);
}

/* ── Faculty Card ── */
.faculty-card {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: transform var(--transition-base);
}

.faculty-card:hover {
    transform: translateY(-2px);
}

.faculty-card__image {
    aspect-ratio: 3 / 4;
    overflow: hidden;
    margin-bottom: var(--space-md);
    background: var(--color-gray);
}

.faculty-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.faculty-card:hover .faculty-card__image img {
    transform: scale(1.03);
}

.faculty-card__name {
    font-family: var(--font-heading);
    font-size: var(--text-h4);
    margin-bottom: var(--space-2xs);
}

.faculty-card__title {
    font-size: var(--text-small);
    color: var(--color-muted);
    margin-bottom: var(--space-xs);
}

.faculty-card__expertise {
    font-size: var(--text-xs);
    color: var(--color-gold-text);
    font-weight: var(--weight-medium);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
}

.faculty-card__links {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
    font-size: var(--text-xs);
}

.faculty-card__links a {
    color: var(--color-muted);
    text-decoration: none;
    font-weight: var(--weight-medium);
    transition: color var(--transition-fast);
}

.faculty-card__links a:hover {
    color: var(--color-navy);
}

/* ── Research Card ── */
.research-card {
    display: block;
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-border);
    text-decoration: none;
    color: inherit;
    transition: border-color var(--transition-fast);
}

.research-card:first-child {
    border-top: 1px solid var(--color-border);
}

.research-card:hover {
    border-bottom-color: var(--color-navy);
}

.research-card__meta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
    font-size: var(--text-xs);
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    font-weight: var(--weight-medium);
}

.research-card__title {
    font-family: var(--font-heading);
    font-size: var(--text-h3);
    margin-bottom: var(--space-sm);
    transition: color var(--transition-fast);
}

.research-card:hover .research-card__title {
    color: var(--color-navy);
}

.research-card__excerpt {
    color: var(--color-muted);
    font-size: var(--text-small);
    line-height: var(--leading-normal);
    max-width: 720px;
}

/* ── Publication Item ── */
.pub-item {
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border-light);
}

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

.pub-item__title {
    font-weight: var(--weight-semibold);
    font-size: var(--text-body);
    margin-bottom: var(--space-xs);
    line-height: var(--leading-snug);
}

.pub-item__title a {
    text-decoration: none;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.pub-item__title a:hover {
    color: var(--color-navy);
}

.pub-item__authors {
    font-size: var(--text-small);
    color: var(--color-muted);
    margin-bottom: var(--space-xs);
}

.pub-item__journal {
    font-size: var(--text-small);
    font-style: italic;
    color: var(--color-muted);
}

.pub-item__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-xs);
    font-size: var(--text-xs);
}

.pub-item__tag {
    display: inline-block;
    padding: 0.2em 0.6em;
    background: var(--color-gray);
    color: var(--color-muted);
    border-radius: var(--radius-sm);
    font-weight: var(--weight-medium);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.pub-item__doi {
    color: var(--color-navy);
    font-weight: var(--weight-medium);
}

/* ── News Card ── */
.news-card {
    display: block;
    text-decoration: none;
    color: inherit;
}

.news-card__image {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    margin-bottom: var(--space-md);
    background: var(--color-gray);
}

.news-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.news-card:hover .news-card__image img {
    transform: scale(1.03);
}

.news-card__category {
    font-size: var(--text-xs);
    color: var(--color-gold-text);
    font-weight: var(--weight-semibold);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    margin-bottom: var(--space-xs);
}

.news-card__title {
    font-family: var(--font-heading);
    font-size: var(--text-h4);
    line-height: var(--leading-snug);
    margin-bottom: var(--space-xs);
    transition: color var(--transition-fast);
}

.news-card:hover .news-card__title {
    color: var(--color-navy);
}

.news-card__date {
    font-size: var(--text-xs);
    color: var(--color-muted);
}

/* ── News List Item (editorial) ── */
.news-list-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border-light);
    text-decoration: none;
    color: inherit;
}

.news-list-item:last-child {
    border-bottom: none;
}

.news-list-item__date {
    flex-shrink: 0;
    width: 80px;
    font-size: var(--text-xs);
    color: var(--color-muted);
    font-weight: var(--weight-medium);
    padding-top: 0.15em;
}

.news-list-item__content {
    flex: 1;
}

.news-list-item__title {
    font-weight: var(--weight-semibold);
    margin-bottom: var(--space-2xs);
    transition: color var(--transition-fast);
}

.news-list-item:hover .news-list-item__title {
    color: var(--color-navy);
}

.news-list-item__excerpt {
    font-size: var(--text-small);
    color: var(--color-muted);
    line-height: var(--leading-normal);
}

/* ── Event Item ── */
.event-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border-light);
}

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

.event-item__date-block {
    flex-shrink: 0;
    width: 64px;
    text-align: center;
    padding-top: var(--space-2xs);
}

.event-item__day {
    font-family: var(--font-heading);
    font-size: var(--text-h2);
    line-height: 1;
    color: var(--color-navy);
}

.event-item__month {
    font-size: var(--text-xs);
    color: var(--color-muted);
    text-transform: uppercase;
    font-weight: var(--weight-semibold);
    letter-spacing: var(--tracking-wide);
}

.event-item__content {
    flex: 1;
}

.event-item__title {
    font-weight: var(--weight-semibold);
    margin-bottom: var(--space-2xs);
}

.event-item__title a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

.event-item__title a:hover {
    color: var(--color-navy);
}

.event-item__info {
    font-size: var(--text-small);
    color: var(--color-muted);
}

.event-item__status {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    margin-top: var(--space-xs);
}

.event-item__status--upcoming {
    color: var(--color-success);
}

.event-item__status--past {
    color: var(--color-muted);
}

/* ── Document Item ── */
.doc-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.doc-item:hover {
    border-color: var(--color-navy);
    background-color: var(--color-offwhite);
}

.doc-item__icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: var(--weight-bold);
    color: var(--color-navy);
    text-transform: uppercase;
}

.doc-item__info {
    flex: 1;
    min-width: 0;
}

.doc-item__title {
    font-weight: var(--weight-medium);
    font-size: var(--text-small);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.doc-item__meta {
    font-size: var(--text-xs);
    color: var(--color-muted);
}

.doc-item__download {
    flex-shrink: 0;
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    color: var(--color-navy);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

/* ── Stat Block ── */
.stat-block {
    padding: var(--space-lg);
    border-left: 2px solid var(--color-border);
}

.stat-block__value {
    font-family: var(--font-heading);
    font-size: var(--text-h2);
    line-height: 1;
    color: var(--color-navy);
    margin-bottom: var(--space-xs);
}

.stat-block__label {
    font-size: var(--text-xs);
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    font-weight: var(--weight-medium);
}

/* ── Timeline ── */
.timeline {
    position: relative;
}

.timeline--horizontal {
    display: flex;
    gap: 0;
    overflow-x: auto;
    padding-bottom: var(--space-lg);
    scrollbar-width: thin;
}

.timeline--horizontal .timeline__item {
    flex: 0 0 auto;
    width: 160px;
    text-align: center;
    position: relative;
    padding-top: var(--space-2xl);
}

.timeline--horizontal::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-border);
}

.timeline--horizontal .timeline__item::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 14px;
    height: 14px;
    background: var(--color-white);
    border: 2px solid var(--color-navy);
    border-radius: 50%;
    z-index: 1;
}

.timeline--horizontal .timeline__item:hover::before {
    background: var(--color-gold);
    border-color: var(--color-gold);
}

.timeline__number {
    font-size: var(--text-xs);
    color: var(--color-gold-text);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-xs);
}

.timeline__title {
    font-weight: var(--weight-semibold);
    font-size: var(--text-small);
    line-height: var(--leading-snug);
}

.timeline--vertical .timeline__item {
    position: relative;
    padding-left: var(--space-2xl);
    padding-bottom: var(--space-xl);
}

.timeline--vertical::before {
    content: '';
    position: absolute;
    top: 0;
    left: 6px;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline--vertical .timeline__item::before {
    content: '';
    position: absolute;
    top: 4px;
    left: 0;
    width: 14px;
    height: 14px;
    background: var(--color-white);
    border: 2px solid var(--color-navy);
    border-radius: 50%;
    z-index: 1;
}

.timeline--vertical .timeline__item:hover::before {
    background: var(--color-gold);
    border-color: var(--color-gold);
}

/* ── Filter Bar ── */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-xl);
}

.filter-bar__label {
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    margin-right: var(--space-sm);
}

.filter-bar__btn {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    color: var(--color-muted);
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 36px;
}

.filter-bar__btn:hover,
.filter-bar__btn--active {
    color: var(--color-navy);
    border-color: var(--color-navy);
    background: var(--color-offwhite);
}

.filter-bar__btn--active {
    font-weight: var(--weight-semibold);
}

/* ── Search Bar ── */
.search-bar {
    position: relative;
    max-width: 480px;
}

.search-bar__input {
    width: 100%;
    padding: var(--space-sm) var(--space-lg);
    padding-right: var(--space-3xl);
    font-size: var(--text-small);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-white);
    transition: border-color var(--transition-fast);
    min-height: 44px;
}

.search-bar__input:focus {
    outline: none;
    border-color: var(--color-navy);
}

.search-bar__input::placeholder {
    color: var(--color-muted-light);
}

.search-bar__submit {
    position: absolute;
    right: var(--space-sm);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-muted);
    cursor: pointer;
    padding: var(--space-xs);
    transition: color var(--transition-fast);
}

.search-bar__submit:hover {
    color: var(--color-navy);
}

/* ── Accordion ── */
.accordion__item {
    border-bottom: 1px solid var(--color-border);
}

.accordion__trigger {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: var(--space-lg) 0;
    font-weight: var(--weight-semibold);
    text-align: left;
    cursor: pointer;
    background: none;
    border: none;
    font-size: var(--text-body);
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.accordion__trigger:hover {
    color: var(--color-navy);
}

.accordion__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    position: relative;
    transition: transform var(--transition-base);
}

.accordion__icon::before,
.accordion__icon::after {
    content: '';
    position: absolute;
    background: currentColor;
    transition: transform var(--transition-base);
}

.accordion__icon::before {
    width: 100%;
    height: 2px;
    top: 50%;
    transform: translateY(-50%);
}

.accordion__icon::after {
    width: 2px;
    height: 100%;
    left: 50%;
    transform: translateX(-50%);
}

.accordion__item[data-open="true"] .accordion__icon::after {
    transform: translateX(-50%) rotate(90deg);
    opacity: 0;
}

.accordion__panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.accordion__content {
    padding-bottom: var(--space-xl);
    color: var(--color-muted);
    line-height: var(--leading-relaxed);
}

/* ── Pagination ── */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding-top: var(--space-3xl);
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    min-height: 40px;
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--text-small);
    font-weight: var(--weight-medium);
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.pagination a:hover {
    border-color: var(--color-navy);
    color: var(--color-navy);
}

.pagination .current {
    background: var(--color-navy);
    border-color: var(--color-navy);
    color: var(--color-white);
}

/* ── CTA Banner ── */
.cta-banner {
    background: var(--color-navy);
    color: var(--color-white);
    padding: var(--space-4xl) 0;
}

.cta-banner__inner {
    text-align: center;
    max-width: 720px;
    margin-inline: auto;
}

.cta-banner__title {
    font-family: var(--font-heading);
    font-size: var(--text-h2);
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.cta-banner__desc {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-xl);
    line-height: var(--leading-relaxed);
}

.cta-banner__actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ── Tag / Badge ── */
.tag {
    display: inline-block;
    padding: 0.2em 0.6em;
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.tag--gold {
    border-color: var(--color-gold);
    color: var(--color-gold-text);
}

/* ── Form Elements ── */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: var(--text-small);
    font-weight: var(--weight-medium);
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-body);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-white);
    transition: border-color var(--transition-fast);
    min-height: 44px;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-navy);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%2369717C'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-md) center;
    padding-right: var(--space-2xl);
}