/* ========== PROJECT PAGE ========== */
.page-content {
    margin-top: 130px;
    padding: 0 5% 3rem 5%;
    max-width: 1850px;
    margin-left: 2%;
    margin-right: auto;
}
#left-hero h1 { font-size: 45px; color: black; font-weight: bold; }
.hero-des { font-size: 1.1rem; color: #4a5568; }

/* ========== FILTER ========== */
.filter-row { margin: 1.5rem 0 2rem 0; display: flex; justify-content: flex-start; }
.filter-bar-horizontal {
    background: #ffffff;
    border-radius: 60px;
    padding: 0.6rem 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.200);
    border: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    width: auto;
}
.filter-label-horizontal {
    font-size: 0.85rem;
    font-weight: 600;
    color: rgb(0, 0, 109);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    white-space: nowrap;
}
.filter-label-horizontal i { font-size: 0.8rem; }
.desktop-filter-horizontal { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.filter-btn-horizontal {
    background: transparent;
    border: none;
    padding: 0.4rem 1rem;
    border-radius: 40px;
    font-size: 0.8rem;
    font-weight: 500;
    color: #4a5568;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    white-space: nowrap;
}
.filter-btn-horizontal:hover { background: #eef2ff; color: rgb(0, 0, 109); }
.filter-btn-horizontal.active { background: rgb(0, 0, 109); color: white; }
.mobile-filter-horizontal { display: none; }
.filter-select-horizontal {
    padding: 0.5rem 2rem 0.5rem 1rem;
    border: 1px solid #cbd5e1;
    border-radius: 40px;
    font-size: 0.8rem;
    background: white;
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    color: #4a5568;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%234a5568' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
}
.filter-select-horizontal:focus { outline: none; border-color: rgb(0, 0, 109); }

/* ========== PROJECTS SECTION ========== */
.projects-section { margin-top: 3%; }
.section-title {
    font-size: 25px;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: rgb(0, 0, 109);
    border-left: 5px solid #0d6efd;
    padding-left: 0.5rem;
}
.section-description {
    font-size: 1rem;
    color: #555;
    margin-bottom: 2rem;
    padding-left: 1rem;
}

/* ========== PROJECTS GRID ========== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
}
.project-card {
    background: #ffffff;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.200);
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid #edf2f7;
}
.project-card:hover { transform: translateY(-5px); box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1); }
.card-image { width: 100%; height: 200px; overflow: hidden; }
.card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.project-card:hover .card-image img { transform: scale(1.03); }
.card-body { padding: 1.5rem; }
.card-body a { text-decoration: none; color: white; }
.tech-tags { margin: 0.5rem 0 1rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tech-tags span {
    background: #eef2ff;
    padding: 0.2rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    color: #1e3a8a;
}
.project-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #0a2b4e;
    margin-bottom: 0.5rem;
}
.project-meta {
    font-size: 0.85rem;
    color: #5a6e8a;
    margin-bottom: 1rem;
    border-left: 3px solid #0d6efd;
    padding-left: 0.6rem;
}
.project-card p {
    font-size: 0.95rem;
    line-height: 1.5;
    color: #2d3e5f;
    margin-bottom: 1.2rem;
}
.project-link {
    display: inline-block;
    background: rgb(0, 0, 109);
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1rem;
    transition: background 0.2s;
}
.project-link:hover { background: #1e40af; }

/* Hidden state */
.project-card.hidden { display: none; }

/* Empty state */
.empty-message { text-align: center; padding: 3rem; color: #6c757d; font-size: 1.1rem; }
.empty-message i { font-size: 3rem; margin-bottom: 1rem; display: block; opacity: 0.5; }

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) and (min-width: 769px) {
    .desktop-filter-horizontal { display: none; }
    .mobile-filter-horizontal { display: block; }
    .filter-bar-horizontal { display: flex; width: 100%; justify-content: space-between; border-radius: 50px; }
    .filter-row { width: 100%; }
}
@media (max-width: 1200px) and (min-width: 769px) {
    .projects-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
}
@media (max-width: 768px) {
    .page-content { margin-top: 75px; padding: 0 1.5rem 2rem 1.5rem; }
    #left-hero h1 { font-size: 30px; }
    .filter-row { width: 100%; }
    .filter-bar-horizontal { width: 100%; justify-content: space-between; }
    .desktop-filter-horizontal { display: none; }
    .mobile-filter-horizontal { display: block; width: auto; }
    .filter-select-horizontal { width: auto; min-width: 130px; }
    .projects-grid { grid-template-columns: 1fr; }
}