.btn,
.text-link,
.project-link-text {
    transition: transform 0.2s ease, opacity 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.9rem 1.25rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 700;
}

.btn:hover,
.text-link:hover,
.project-card:hover .project-link-text {
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #5ad7ff);
    color: #09101c;
}

.btn-secondary {
    border-color: var(--border);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
}

.text-link {
    color: var(--primary-strong);
    font-weight: 700;
}

.section-heading,
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.page-header {
    flex-direction: column;
    align-items: flex-start;
}

.page-header h1,
.hero h1,
.not-found h1,
.project-hero h1,
.about-page h1,
.contact-page h1 {
    font-size: clamp(2.2rem, 5vw, 4rem);
    line-height: 1.05;
    margin-bottom: 1rem;
}

.project-grid,
.video-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.project-card,
.video-card,
.about-card,
.stat-card,
.detail-card,
.contact-form,
.filter-bar,
.not-found {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
    box-shadow: var(--shadow);
}

.project-card {
    overflow: hidden;
}

.project-card-link {
    display: block;
    height: 100%;
}

.project-card:hover {
    transform: translateY(-4px);
    transition: transform 0.25s ease;
}

.project-thumbnail {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background: #11182f;
}

.project-thumbnail-placeholder {
    display: grid;
    place-items: center;
    padding: 1rem;
    color: var(--text-soft);
    font-weight: 700;
}

.project-card-content,
.video-info,
.about-card,
.stat-card,
.detail-card,
.contact-form,
.not-found,
.filter-bar {
    padding: 1.35rem;
}

.project-card-topline {
    margin-bottom: 0.75rem;
}

.project-category {
    display: inline-flex;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    background: rgba(45, 212, 191, 0.1);
    color: #86f0e1;
    font-size: 0.82rem;
    font-weight: 700;
}

.project-title,
.video-info h3,
.about-card h2 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.project-description,
.video-info p,
.empty-state,
.about-card li,
.contact-copy p,
.project-summary,
.page-header p,
.hero p {
    color: var(--text-soft);
}

.project-tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.project-tech-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    border: 1px solid rgba(124, 156, 255, 0.28);
    background: rgba(124, 156, 255, 0.12);
    color: #dbe6ff;
    font-size: 0.82rem;
    font-weight: 600;
}

.project-link-text {
    display: inline-flex;
    margin-top: 1rem;
    color: var(--primary-strong);
    font-weight: 700;
}

.video-container {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.video-container iframe {
    width: 100%;
    height: 100%;
}

.video-container-placeholder {
    display: grid;
    place-items: center;
    background: #11182f;
}

.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.filter-search-wrap {
    flex: 1;
}

.filter-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-search,
.contact-form input,
.contact-form textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    padding: 0.95rem 1rem;
}

.filter-search::placeholder,
.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: #8b96bc;
}

.custom-select {
    position: relative;
    min-width: 240px;
}

.custom-select-trigger {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.95rem 1rem;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    cursor: pointer;
    text-align: left;
}

.custom-select-trigger:focus-visible,
.custom-select-option:focus-visible,
.filter-btn:focus-visible,
.filter-search:focus-visible,
.contact-form input:focus-visible,
.contact-form textarea:focus-visible {
    outline: 2px solid rgba(124, 156, 255, 0.65);
    outline-offset: 2px;
}

.custom-select.is-open .custom-select-trigger {
    border-color: rgba(124, 156, 255, 0.5);
}

.custom-select-chevron {
    font-size: 0.8rem;
    transition: transform 0.2s ease;
}

.custom-select.is-open .custom-select-chevron {
    transform: rotate(180deg);
}

.custom-select-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    z-index: 50;
    max-height: 320px;
    overflow-y: auto;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #0b1530;
    box-shadow: var(--shadow);
}

.custom-select-option {
    width: 100%;
    display: block;
    padding: 0.8rem 0.85rem;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    text-align: left;
}

.custom-select-option:hover,
.custom-select-option.is-selected {
    background: rgba(124, 156, 255, 0.22);
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.filter-btn {
    padding: 0.8rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
}

.filter-btn.is-active {
    background: rgba(124, 156, 255, 0.18);
    border-color: rgba(124, 156, 255, 0.4);
}

.contact-form {
    display: grid;
    gap: 1rem;
}

.form-group {
    display: grid;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
}

.field-error {
    min-height: 1.15rem;
    color: var(--danger);
}

.input-error {
    border-color: rgba(255, 123, 123, 0.7) !important;
}

.empty-state {
    margin: 1rem 0 0;
}

.not-found {
    max-width: 720px;
    margin: 3rem auto;
    text-align: center;
}

.hidden {
    display: none !important;
}

@media (max-width: 1024px) {
    .project-grid,
    .video-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .project-grid,
    .video-grid {
        grid-template-columns: 1fr;
    }

    .section-heading,
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .custom-select {
        min-width: 100%;
    }
}