/* Header Styles for Portfolio Page */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-1);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header__container {
    max-width: 120rem;
    margin: 0 auto;
    padding: 2rem var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header__logo {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--color-4);
    text-decoration: none;
    transition: color 0.3s ease;
}

.header__logo:hover {
    color: var(--color-white);
}

.header__nav {
    display: flex;
    align-items: center;
}

.header__menu {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.header__menu a {
    font-size: 1.6rem;
    color: var(--color-white);
    text-decoration: none;
    padding: 0.8rem 1.6rem;
    transition: color 0.3s ease;
    position: relative;
}

.header__menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-4);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.header__menu a:hover::after,
.header__menu a.active::after {
    transform: scaleX(1);
}

.header__menu a:hover,
.header__menu a.active {
    color: var(--color-4);
}

.header__mobile-menu {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.header__mobile-menu span {
    display: block;
    width: 2.5rem;
    height: 0.2rem;
    background-color: var(--color-white);
    margin: 0.5rem 0;
    transition: all 0.3s ease;
}

/* Mobile Menu Active States */
.header__mobile-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(0.5rem, 0.5rem);
}

.header__mobile-menu.active span:nth-child(2) {
    opacity: 0;
}

.header__mobile-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(0.5rem, -0.5rem);
}

@media (max-width: 768px) {
    .header__mobile-menu {
        display: block;
    }

    .header__nav {
        position: fixed;
        top: 7rem;
        left: 0;
        width: 100%;
        background-color: var(--color-1);
        padding: var(--spacing-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .header__nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .header__menu {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }

    .header__menu a {
        display: block;
        width: 100%;
        text-align: center;
        padding: 1.2rem;
    }
}

/* Portfolio Section */
.portfolio {
    min-height: 100vh;
    padding: 120px 0;
    background: linear-gradient(135deg, var(--color-1) 0%, var(--color-2) 100%);
}

.portfolio__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.portfolio__title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--color-white);
    background: linear-gradient(to right, var(--color-4), var(--color-3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: titleGlow 2s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    from {
        text-shadow: 0 0 20px rgba(0, 168, 232, 0.5);
    }
    to {
        text-shadow: 0 0 30px rgba(0, 168, 232, 0.8);
    }
}

/* Portfolio Filters */
.portfolio__filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.portfolio__filter {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-white);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.portfolio__filter:hover {
    background: var(--color-4);
    color: var(--color-white);
    transform: translateY(-2px);
}

.portfolio__filter.active {
    background: var(--color-4);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(0, 168, 232, 0.3);
}

/* Portfolio Grid */
.portfolio__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

/* Portfolio Item */
.portfolio__item {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.portfolio__item:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    border-color: var(--color-4);
}

.portfolio__image-container {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
}

.portfolio__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.portfolio__item:hover .portfolio__image {
    transform: scale(1.1);
}

.portfolio__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 23, 31, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

.portfolio__item:hover .portfolio__overlay {
    opacity: 1;
}

.portfolio__actions {
    display: flex;
    gap: 1rem;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.portfolio__item:hover .portfolio__actions {
    transform: translateY(0);
}

.portfolio__content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.portfolio__item-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 0.8rem;
    transition: color 0.3s ease;
}

.portfolio__item:hover .portfolio__item-title {
    color: var(--color-4);
}

.portfolio__item-description {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1.2rem;
}

.portfolio__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
}

.tag {
    padding: 0.4rem 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-4);
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.tag:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-4);
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .portfolio {
        padding: 80px 0;
    }

    .portfolio__title {
        font-size: 2.5rem;
    }

    .portfolio__filter {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .portfolio__grid {
        grid-template-columns: 1fr;
    }

    .portfolio__title {
        font-size: 2rem;
    }
}