/* ============================================
   APU Repozitorij — repo.apuri.com.hr
   Prati dizajn sustav apuri.uniri.hr
   ============================================ */

:root {
    --font-base: 'Work Sans', -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --color-accent: #ff5e5e;
    --color-accent-hover: #e94545;
    --color-text: #2c2c2c;
    --color-text-light: #666;
    --color-bg: #ffffff;
    --color-bg-light: #f8f8f8;
    --color-border: #e8e8e8;
    --color-header-bg: #1a1a1a;
    --container-max: 1200px;
    --font-size-base: 17px;
    --radius: 6px;
    --transition: 0.15s ease-in-out;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-base);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-accent-hover);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Header
   ============================================ */

.site-header {
    background: var(--color-header-bg);
    color: #fff;
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    gap: 20px;
    height: 64px;
}

.header-logo {
    display: flex;
    align-items: baseline;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: #fff;
    text-decoration: none;
    flex-shrink: 0;
}

.header-logo:hover {
    color: #fff;
}

.logo-apu {
    color: #fff;
}

.logo-ri {
    color: var(--color-accent);
}

.lang-toggle {
    display: flex;
    gap: 4px;
    margin-left: auto;
    flex-shrink: 0;
}

.lang-btn {
    font-family: var(--font-base);
    font-size: 12px;
    font-weight: 700;
    padding: 4px 10px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 4px;
    background: transparent;
    color: #888;
    cursor: pointer;
    transition: all var(--transition);
}

.lang-btn:hover {
    color: #fff;
    border-color: rgba(255,255,255,0.6);
}

.lang-btn.active {
    color: #fff;
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.header-title h1 {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.2;
    color: #fff;
}

.header-title p {
    font-size: 12px;
    color: #aaa;
    line-height: 1.3;
}

/* ============================================
   Hero
   ============================================ */

.hero {
    background: var(--color-bg-light);
    border-bottom: 1px solid var(--color-border);
    padding: 40px 0;
}

.hero-text {
    font-size: 19px;
    line-height: 1.6;
    color: var(--color-text-light);
    max-width: 800px;
}

/* ============================================
   Filters
   ============================================ */

.filters {
    padding: 24px 0;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 64px;
    background: var(--color-bg);
    z-index: 50;
}

.filter-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.filter-categories {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.filter-btn {
    font-family: var(--font-base);
    font-size: 14px;
    font-weight: 400;
    padding: 7px 16px;
    border: 1px solid var(--color-border);
    border-radius: 100px;
    background: var(--color-bg);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition);
}

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

.filter-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.filter-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.filter-select,
.filter-input {
    font-family: var(--font-base);
    font-size: 14px;
    padding: 7px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    color: var(--color-text);
    outline: none;
    transition: border-color var(--transition);
}

.filter-select:focus,
.filter-input:focus {
    border-color: var(--color-accent);
}

.filter-input {
    width: 200px;
}

/* ============================================
   Project Grid
   ============================================ */

.projects {
    padding: 32px 0 64px;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.project-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    background: var(--color-bg);
}

.project-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.card-thumbnail {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    background: var(--color-bg-light);
}

.card-body {
    padding: 16px;
}

.card-category {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin-bottom: 6px;
}

.card-title {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 6px;
    color: var(--color-text);
}

.card-authors {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.card-year {
    font-size: 12px;
    color: var(--color-text-light);
    background: var(--color-bg-light);
    padding: 2px 10px;
    border-radius: 100px;
}

.card-tech {
    font-size: 11px;
    color: var(--color-text-light);
    background: var(--color-bg-light);
    padding: 2px 8px;
    border-radius: 100px;
}

.no-results {
    text-align: center;
    color: var(--color-text-light);
    padding: 64px 0;
    font-size: 18px;
}

/* ============================================
   Project Detail
   ============================================ */

.project-detail {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: none;
    justify-content: flex-end;
}

.project-detail.active {
    display: flex;
}

.detail-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    cursor: pointer;
}

.detail-panel {
    position: relative;
    width: 100%;
    max-width: 640px;
    background: var(--color-bg);
    overflow-y: auto;
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
    animation: slideIn 0.25s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
}

.detail-close {
    position: sticky;
    top: 0;
    float: right;
    font-size: 28px;
    background: var(--color-bg);
    border: none;
    cursor: pointer;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    z-index: 10;
    transition: color var(--transition);
}

.detail-close:hover {
    color: var(--color-accent);
}

.detail-content {
    padding: 0 32px 48px;
}

.detail-thumbnail {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    border-radius: var(--radius);
    margin-bottom: 24px;
    background: var(--color-bg-light);
}

.detail-category {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.detail-title {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 8px;
}

.detail-authors {
    font-size: 17px;
    color: var(--color-text-light);
    margin-bottom: 16px;
}

.detail-description {
    font-size: 17px;
    line-height: 1.6;
    margin-bottom: 24px;
    color: var(--color-text);
}

.detail-meta-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 24px;
    font-size: 15px;
}

.detail-meta-table tr {
    border-bottom: 1px solid var(--color-border);
}

.detail-meta-table td {
    padding: 10px 0;
}

.detail-meta-table td:first-child {
    font-weight: 700;
    color: var(--color-text-light);
    width: 140px;
    vertical-align: top;
}

.detail-meta-table td:last-child {
    color: var(--color-text);
}

/* Authors list with roles */
.detail-authors-list {
    list-style: none;
    margin: 0 0 16px;
    padding: 0;
    font-size: 15px;
    color: var(--color-text-light);
}

.detail-authors-list li {
    padding: 4px 0;
}

.detail-authors-list li strong {
    color: var(--color-text);
    font-weight: 700;
}

/* Tags */
.detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 20px;
}

.detail-tag {
    font-size: 12px;
    color: var(--color-text-light);
    background: var(--color-bg-light);
    padding: 3px 12px;
    border-radius: 100px;
    border: 1px solid var(--color-border);
}

/* Libraries */
.detail-libraries {
    margin-bottom: 20px;
    padding: 16px;
    background: var(--color-bg-light);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.detail-libraries h4 {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.detail-libraries ul {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 14px;
}

.detail-libraries li {
    padding: 3px 0;
}

.detail-libraries a {
    color: var(--color-accent);
}

.lib-license {
    color: var(--color-text-light);
    font-size: 12px;
}

/* License badge */
.detail-license {
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.license-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    padding: 5px 14px;
    border: 2px solid var(--color-text);
    border-radius: 4px;
    color: var(--color-text);
    text-decoration: none;
    transition: all var(--transition);
}

.license-badge:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.license-note {
    font-size: 12px;
    color: var(--color-text-light);
    font-style: italic;
}

.btn-launch {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-base);
    font-size: 16px;
    font-weight: 700;
    padding: 12px 32px;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: 100px;
    cursor: pointer;
    text-decoration: none;
    transition: background var(--transition);
}

.btn-launch:hover {
    background: var(--color-accent-hover);
    color: #fff;
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
    background: var(--color-header-bg);
    color: #aaa;
    padding: 32px 0;
    font-size: 14px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-info strong {
    color: #fff;
    font-weight: 700;
}

.footer-info a {
    color: var(--color-accent);
}

.footer-note {
    max-width: 400px;
    text-align: right;
    font-size: 13px;
    color: #777;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
    .header-inner {
        height: auto;
        padding: 12px 0;
        flex-wrap: wrap;
    }

    .header-title h1 {
        font-size: 14px;
    }

    .hero {
        padding: 24px 0;
    }

    .hero-text {
        font-size: 16px;
    }

    .filter-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .filter-controls {
        width: 100%;
    }

    .filter-input {
        flex: 1;
        width: auto;
    }

    .project-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .detail-panel {
        max-width: 100%;
    }

    .detail-content {
        padding: 0 20px 32px;
    }

    .detail-title {
        font-size: 22px;
    }

    .footer-inner {
        flex-direction: column;
    }

    .footer-note {
        text-align: left;
    }
}

@media (min-width: 769px) and (max-width: 991px) {
    .project-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}