/* ==========================================================================
   Atai Projects Plugin - Styles
   WCAG 2.1 AA Compliant: Focus states, contrast ratios, reduced motion
   ========================================================================== */

:root {
    --atai-primary: #2A1A40;
    --atai-primary-light: #4A2D6E;
    --atai-accent: #C9A84C;
    --atai-white: #FFFFFF;
    --atai-dark: #1A1A2E;
    --atai-gray: #6B7280;
    --atai-light-gray: #F3F4F6;
    --atai-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Screen Reader Only */
.screen-reader-text {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* === FILTERS === */
.atai-project-filters {
    margin-bottom: 40px;
    text-align: center;
}

.atai-project-filters ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

.atai-filter-btn {
    background: transparent;
    border: 2px solid var(--atai-primary);
    color: var(--atai-primary);
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--atai-transition);
    font-family: inherit;
}

.atai-filter-btn:hover,
.atai-filter-btn.active {
    background: var(--atai-primary);
    color: var(--atai-white);
}

/* WCAG: Visible focus indicator (min 3:1 contrast, 2px outline) */
.atai-filter-btn:focus-visible {
    outline: 3px solid var(--atai-accent);
    outline-offset: 2px;
}

/* === GRID === */
.atai-projects-grid {
    display: grid;
    gap: 20px;
}

.atai-projects-grid.columns-2 { grid-template-columns: repeat(2, 1fr); }
.atai-projects-grid.columns-3 { grid-template-columns: repeat(3, 1fr); }
.atai-projects-grid.columns-4 { grid-template-columns: repeat(4, 1fr); }

/* === PROJECT ITEM === */
.atai-project-item {
    position: relative;
    overflow: hidden;
    border-radius: 0;
}

.atai-project-item:focus-visible {
    outline: 3px solid var(--atai-accent);
    outline-offset: 2px;
}

.atai-project-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4 / 3;
}

.atai-project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.atai-project-item:hover .atai-project-image img,
.atai-project-item:focus-within .atai-project-image img {
    transform: scale(1.08);
}

/* === PLACEHOLDER === */
.atai-project-placeholder {
    width: 100%;
    height: 100%;
    background: var(--atai-light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--atai-gray);
    font-size: 16px;
    font-weight: 500;
}

/* === OVERLAY === */
.atai-project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(42, 26, 64, 0.88);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--atai-transition);
}

.atai-project-item:hover .atai-project-overlay,
.atai-project-item:focus-within .atai-project-overlay {
    opacity: 1;
}

.atai-project-overlay-content {
    text-align: center;
    padding: 20px;
    transform: translateY(15px);
    transition: transform var(--atai-transition);
}

.atai-project-item:hover .atai-project-overlay-content,
.atai-project-item:focus-within .atai-project-overlay-content {
    transform: translateY(0);
}

.atai-project-category {
    display: block;
    color: var(--atai-accent);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
    font-weight: 600;
}

.atai-project-title {
    color: var(--atai-white);
    font-size: 22px;
    font-weight: 700;
    margin: 0 0 8px;
    line-height: 1.3;
}

.atai-project-location {
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px;
    display: block;
    margin-bottom: 15px;
}

.atai-project-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: 2px solid var(--atai-accent);
    color: var(--atai-accent);
    text-decoration: none;
    font-size: 24px;
    transition: all var(--atai-transition);
}

.atai-project-link:hover,
.atai-project-link:focus-visible {
    background: var(--atai-accent);
    color: var(--atai-dark);
}

.atai-project-link:focus-visible {
    outline: 3px solid var(--atai-white);
    outline-offset: 2px;
}

/* === SINGLE PROJECT === */
.atai-project-single { max-width: 1200px; margin: 0 auto; }

.atai-project-hero img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.atai-project-content-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
    padding: 50px 0;
}

.atai-project-single-title {
    font-size: 36px;
    color: var(--atai-primary);
    margin-bottom: 20px;
    font-weight: 700;
}

.atai-sidebar-title {
    font-size: 22px;
    color: var(--atai-primary);
    padding-bottom: 15px;
    border-bottom: 2px solid var(--atai-accent);
    margin-bottom: 20px;
}

.atai-project-meta-list dt {
    font-weight: 600;
    color: var(--atai-primary);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 15px;
}

.atai-project-meta-list dd {
    margin: 5px 0 0 0;
    color: var(--atai-gray);
    font-size: 16px;
}

/* === NO PROJECTS === */
.atai-no-projects {
    text-align: center;
    padding: 60px;
    color: var(--atai-gray);
    font-size: 18px;
    grid-column: 1 / -1;
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .atai-projects-grid.columns-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .atai-projects-grid.columns-3,
    .atai-projects-grid.columns-4 { grid-template-columns: repeat(2, 1fr); }
    .atai-project-content-wrapper { grid-template-columns: 1fr; gap: 30px; }
    .atai-project-hero img { height: 300px; }
}

@media (max-width: 480px) {
    .atai-projects-grid.columns-2,
    .atai-projects-grid.columns-3,
    .atai-projects-grid.columns-4 { grid-template-columns: 1fr; }
    .atai-filter-btn { padding: 8px 16px; font-size: 12px; }
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
    .atai-project-image img,
    .atai-project-overlay,
    .atai-project-overlay-content,
    .atai-filter-btn,
    .atai-project-link {
        transition: none !important;
        transform: none !important;
    }
    .atai-project-item:hover .atai-project-overlay { opacity: 1; }
}

/* === HIGH CONTRAST === */
@media (forced-colors: active) {
    .atai-filter-btn { border: 2px solid ButtonText; }
    .atai-project-link { border: 2px solid LinkText; }
}