/* Portfolio Accordion Section */
.portfolio-accordion {
    min-height: 100vh;
    padding: 6rem 1rem 5rem;
    background: var(--bg-color);
    transition: background 0.5s;
    position: relative;
    overflow: hidden;
}

@keyframes gradientSweep {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

.portfolio-gradient-text {
    background: linear-gradient(90deg, var(--accent-orange), var(--text-primary), var(--accent-blue));
    background-size: 200% auto;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientMove 5s ease infinite;
}

.portfolio-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    background: rgba(255,146,1,0.05);
    color: #ff9201;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 2rem;
}

.dark-mode .portfolio-badge {
    background: rgba(255,146,1,0.1);
    border-color: rgba(255,146,1,0.2);
}

.portfolio-badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #ff9201;
    animation: pulse 2s infinite;
}

.portfolio-header {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 3rem;
}

.portfolio-header h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    line-height: 0.9;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.portfolio-header p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    line-height: 1.7;
}

.portfolio-gallery {
    display: flex;
    gap: 1rem;
    max-width: 2500px;
    margin: 0 auto;
    height: 850px;
}

.portfolio-item {
    position: relative;
    border-radius: 1.5rem;
    overflow: hidden;
    cursor: pointer;
    transition: flex 0.6s cubic-bezier(0.25,1,0.5,1), opacity 0.4s ease;
    flex: 1;
    opacity: 0.6;
    will-change: flex, opacity;
}

.portfolio-item.active {
    flex: 3;
    opacity: 1;
}

.portfolio-item:hover {
    opacity: 1;
}

.portfolio-item-bg {
    position: absolute;
    inset: 0;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.portfolio-item-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s ease-out;
    will-change: transform;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.portfolio-item.active .portfolio-item-bg img {
    transform: scale(1.05) translateZ(0);
}

.portfolio-item:not(.active) .portfolio-item-bg img {
    filter: grayscale(1) brightness(0.8);
    transform: scale(1) translateZ(0);
}

.portfolio-item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.9), rgba(0,0,0,0.2), transparent);
    opacity: 0.8;
    transition: opacity 0.5s;
}

.portfolio-item.active .portfolio-item-overlay {
    opacity: 0.8;
}

.portfolio-item:not(.active) .portfolio-item-overlay {
    opacity: 0.7;
}

.portfolio-item-content {
    position: absolute;
    inset: 0;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.portfolio-item-expanded {
    transition: all 0.5s;
    transform: translateY(0);
    opacity: 1;
}

.portfolio-item:not(.active) .portfolio-item-expanded {
    transform: translateY(2rem);
    opacity: 0;
    pointer-events: none;
}

.portfolio-item-category {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #ff9201;
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.portfolio-item-title {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
    line-height: 1;
}

.portfolio-item-desc {
    color: rgba(255,255,255,0.9);
    font-size: 1rem;
    line-height: 1.6;
    max-width: 500px;
    margin-bottom: 2rem;
    border-left: 2px solid #ff9201;
    padding-left: 1rem;
}

.portfolio-item-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    background: white;
    color: #000;
    font-weight: 700;
    font-size: 0.875rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

.dark-mode .portfolio-item-btn {
    background: white;
    color: #000;
}

.portfolio-item-btn:hover {
    background: #ff9201;
    color: white;
    transform: scale(1.05);
}

.portfolio-item-collapsed {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    writing-mode: vertical-rl;
    text-orientation: mixed;
    transform: translateX(-50%) rotate(180deg);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.7);
    white-space: nowrap;
    transition: all 0.5s;
}

.portfolio-item.active .portfolio-item-collapsed {
    opacity: 0;
    transform: translateX(-50%) translateY(1rem) rotate(180deg);
}

/* Mobile collapsed state */
.portfolio-item-mobile-label {
    display: none;
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.5s;
}

.portfolio-item.active .portfolio-item-mobile-label {
    opacity: 0;
    transform: translateY(1rem);
}

.portfolio-item-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(0,0,0,0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.portfolio-item-mobile-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: white;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Responsive */
@media (max-width: 767px) {
    .portfolio-accordion {
        padding: 4rem 1rem 3rem;
    }
    .portfolio-header {
        margin-bottom: 2rem;
    }
    .portfolio-header h1 {
        font-size: clamp(2rem, 10vw, 3rem);
        line-height: 1.1;
    }
    .portfolio-header p {
        font-size: 0.9375rem;
    }
    .portfolio-gallery {
        flex-direction: column;
        height: auto;
        gap: 0.75rem;
    }
    .portfolio-item {
        height: 350px;
        min-height: 350px;
        opacity: 1;
    }
    .portfolio-item.active {
        flex: 1;
        height: 450px;
        min-height: 450px;
    }
    .portfolio-item-content {
        padding: 1.5rem;
    }
    .portfolio-item-collapsed {
        display: none;
    }
    .portfolio-item-mobile-label {
        display: flex;
    }
    .portfolio-item-desc {
        display: none;
    }
    .portfolio-item-title {
        font-size: 1.5rem;
    }
    .portfolio-item-btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.8125rem;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .portfolio-gallery {
        height: 600px;
    }
}

@media (min-width: 1024px) and (max-width: 1439px) {
    .portfolio-gallery {
        height: 700px;
    }
}

@media (min-width: 1440px) and (max-width: 1919px) {
    .portfolio-gallery {
        height: 800px;
    }
}

@media (min-width: 1920px) and (max-width: 2559px) {
    .portfolio-gallery {
        height: 850px;
        max-width: 1800px;
    }
}

@media (min-width: 2560px) and (max-width: 3839px) {
    .portfolio-gallery {
        height: 900px;
        max-width: 2200px;
    }
}

@media (min-width: 3840px) and (max-width: 5119px) {
    .portfolio-gallery {
        height: 1000px;
        max-width: 3000px;
    }
}

@media (min-width: 5120px) {
    .portfolio-gallery {
        height: 1100px;
        max-width: 3500px;
    }
}

@media (orientation: portrait) and (min-width: 768px) {
    .portfolio-gallery {
        flex-direction: column;
        height: auto;
    }
    .portfolio-item {
        height: 400px;
    }
}