/* ═══════════════════════════════════════════
   PORTFOLIO PAGE — stili puliti e definitivi
   ═══════════════════════════════════════════ */

/* Hero */
.portfolio-hero {
    padding-top: 160px;
    padding-bottom: 60px;
    background: linear-gradient(180deg, var(--navy) 0%, var(--dark-bg) 100%);
    text-align: center;
}
.portfolio-hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--text-white);
    text-transform: uppercase;
}
.portfolio-hero .highlight {
    color: var(--cyan);
    text-shadow: 0 0 20px rgba(0,217,255,0.4);
}
.portfolio-hero p {
    color: var(--text-light);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Filter bar */
.portfolio-controls {
    padding: 0 5% 4rem 5%;
    display: flex;
    justify-content: center;
    background-color: var(--dark-bg);
}
.filter-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}
.filter-btn {
    background: transparent;
    border: 1px solid rgba(0,217,255,0.3);
    color: var(--text-light);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}
.filter-btn.active, .filter-btn:hover {
    background: var(--cyan);
    color: var(--navy);
    font-weight: bold;
    box-shadow: 0 0 15px rgba(0,217,255,0.3);
}

/* Container */
.projects-container {
    padding: 0 5% 8rem 5%;
    background-color: var(--dark-bg);
    max-width: 1400px;
    margin: 0 auto;
}

/* Singolo progetto — layout fisso 50/50 */
.project-section {
    display: flex;
    align-items: center;
    gap: 4rem;
    padding: 5rem 0;
    opacity: 0;
    animation: fadeInProject 0.8s ease forwards;
}
.project-section:nth-child(odd)  { flex-direction: row; }
.project-section:nth-child(even) { flex-direction: row-reverse; }

/* Media (thumbnail) — larghezza fissa, NON si espande */
.project-media {
    flex: 0 0 48%;
    width: 48%;
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    cursor: pointer;
    aspect-ratio: 16/9;
    border: 1px solid rgba(0,217,255,0.1);
    transition: border-color 0.4s, transform 0.4s;
}
.project-media img {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.6s;
}
.project-media:hover { border-color: var(--cyan); transform: translateY(-5px); }
.project-media:hover img { transform: scale(1.05); }

/* Overlay play */
.media-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10,22,40,0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
    gap: 1rem;
}
.project-media:hover .media-overlay { opacity: 1; }
.play-btn {
    width: 70px; height: 70px;
    background: var(--cyan);
    color: var(--navy);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 0 20px rgba(0,217,255,0.6);
    transform: scale(0.8);
    transition: transform 0.3s;
}
.project-media:hover .play-btn { transform: scale(1.1); }
.media-overlay span {
    color: var(--text-white);
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.9rem;
}

/* Dettagli testo */
.project-details {
    flex: 0 0 48%;
    width: 48%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.project-header {
    margin-bottom: 2rem;
    border-left: 4px solid var(--cyan);
    padding-left: 1.5rem;
}
.project-tag {
    display: inline-block;
    color: var(--cyan);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
    font-weight: bold;
}
.project-header h2 {
    font-size: 2.2rem;
    color: var(--text-white);
    margin: 0;
    line-height: 1.2;
}
.project-description { color: var(--text-light); margin-bottom: 2rem; }
.project-description h3 {
    color: var(--text-white);
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
    margin-top: 1.5rem;
}
.project-description h3:first-child { margin-top: 0; }
.project-description p { line-height: 1.7; margin-bottom: 1rem; font-size: 1rem; }

/* Link nel testo */
.project-description a {
    color: var(--cyan);
    text-decoration: none;
    border-bottom: 1px solid rgba(0,217,255,0.4);
    transition: color 0.2s, border-color 0.2s;
}
.project-description a:hover { color: #fff; border-bottom-color: #fff; }

/* Tech stack */
.tech-stack { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.tech-stack span {
    background: rgba(255,255,255,0.05);
    color: var(--text-light);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.85rem;
    border: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s;
}
.tech-stack span:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }

/* Divider */
.project-divider {
    border: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,217,255,0.2), transparent);
    width: 80%;
    margin: 0 auto;
}

/* Classi filtro */
.project-section.hidden { display: none !important; }
.project-divider.hidden { display: none !important; }

/* Animazione */
@keyframes fadeInProject {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ─────────────────────────────── */
@media (max-width: 968px) {
    .project-section,
    .project-section:nth-child(odd),
    .project-section:nth-child(even) {
        flex-direction: column !important;
        gap: 2rem;
        padding: 3rem 0;
    }
    .project-media,
    .project-details {
        flex: 0 0 100% !important;
        width: 100% !important;
    }
    .project-header h2 { font-size: 1.8rem; }
    .portfolio-hero h1 { font-size: 2.5rem; }
}

@media (max-width: 768px) {
    .portfolio-hero { padding: 120px 4% 3rem; }
    .portfolio-hero h1 { font-size: 2rem; }
    .portfolio-hero p  { font-size: 0.95rem; }
    .portfolio-controls { padding: 1rem 4%; }
    .filter-btn { font-size: 0.8rem; padding: 0.5rem 1rem; }
    .projects-container { padding: 0 4% 4rem; }
    .project-header h2 { font-size: 1.5rem; }
    .project-description p { font-size: 0.9rem; }
    .tech-stack span { font-size: 0.75rem; padding: 0.25rem 0.6rem; }
}

@media (max-width: 480px) {
    .portfolio-hero h1 { font-size: 1.7rem; }
    .filter-buttons { justify-content: center; gap: 0.5rem; }
}