:root {
    /* Material Design Dark Theme Colors */
    --md-primary: #bb86fc;
    --md-primary-variant: #3700b3;
    --md-secondary: #8156b6;
    --md-secondary-variant: #613f8a;
    --md-background: #121212;
    --md-surface: #1e1e1e;
    --md-surface-variant: #2d2d2d;
    --md-error: #cf6679;
    --md-on-primary: #000000;
    --md-on-secondary: #000000;
    --md-on-background: #ffffff;
    --md-on-surface: #ffffff;
    --md-on-surface-variant: #e0e0e0;
    --md-outline: #79747e;
    --md-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    --md-elevation-1: 0 1px 3px rgba(0, 0, 0, 0.4);
    --md-elevation-2: 0 2px 6px rgba(0, 0, 0, 0.4);
    --md-elevation-3: 0 4px 12px rgba(0, 0, 0, 0.4);
    --md-elevation-4: 0 8px 20px rgba(0, 0, 0, 0.4);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
    color: var(--md-on-background);
    line-height: 1.6;
    background-color: var(--md-background);
    font-weight: 400;
}

a {
    text-decoration: none;
    color: var(--md-primary);
    transition: color 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
}

a:hover {
    color: var(--md-secondary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header Section */
header {
    background-color: var(--md-surface);
    color: var(--md-on-surface);
    padding: 48px 0;
    text-align: center;
    position: relative;
    box-shadow: var(--md-elevation-2);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 16px;
    color: var(--md-on-surface);
    font-weight: 400;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 1.125rem;
    margin-bottom: 32px;
    color: var(--md-on-surface-variant);
    font-weight: 300;
    letter-spacing: 0.15px;
}

.back-button {
    display: inline-flex;
    align-items: center;
    background-color: var(--md-surface-variant);
    color: var(--md-on-surface);
    padding: 12px 24px;
    border-radius: 24px;
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 0.25px;
    transition: all 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
    position: absolute;
    left: 24px;
    top: 24px;
    box-shadow: var(--md-elevation-1);
}

.back-button:hover {
    background-color: var(--md-primary);
    color: var(--md-on-primary);
    transform: translateY(-1px);
    box-shadow: var(--md-elevation-2);
}

.back-button i {
    margin-right: 8px;
}

.tech-stack {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.tech {
    background-color: var(--md-surface-variant);
    color: var(--md-on-surface);
    padding: 8px 16px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.25px;
    transition: all 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.tech:hover {
    background-color: rgba(187, 134, 252, 0.12);
    color: var(--md-primary);
    transform: scale(1.02);
}

/* Gallery Section */
section {
    padding: 64px 0;
    background-color: var(--md-background);
}

.section-title {
    text-align: center;
    margin-bottom: 48px;
    position: relative;
    font-size: 2rem;
    color: var(--md-on-background);
    font-weight: 400;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    display: block;
    width: 64px;
    height: 3px;
    background-color: var(--md-primary);
    margin: 16px auto;
    border-radius: 2px;
}

/* Gallery Grid */
.gallery-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    padding: 24px;
}

.gallery-item {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--md-elevation-2);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    background-color: var(--md-surface);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--md-elevation-4);
}

.gallery-img-container {
    position: relative;
    width: 100%;
    padding-top: 177.7%; /* 16:9 aspect ratio vertical (9:16) */
    overflow: hidden;
    background-color: var(--md-surface-variant);
}

.gallery-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.gallery-item:hover .gallery-img {
    transform: scale(1.05);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.9), rgba(0,0,0,0));
    color: var(--md-on-surface);
    font-size: 14px;
    text-align: center;
    font-weight: 500;
    letter-spacing: 0.25px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.95);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 24px;
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    max-width: 90%;
    max-height: 85vh;
    background-color: var(--md-surface);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--md-elevation-4);
}

.modal-img {
    display: block;
    max-width: 100%;
    max-height: 75vh;
    border-radius: 8px;
}

.modal-caption {
    color: var(--md-on-surface);
    text-align: center;
    padding: 20px;
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.15px;
    background-color: var(--md-surface);
}

.close-modal {
    position: absolute;
    top: -48px;
    right: 0;
    color: var(--md-on-surface);
    font-size: 32px;
    cursor: pointer;
    background: var(--md-surface-variant);
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: var(--md-elevation-2);
}

.close-modal:hover {
    background-color: var(--md-primary);
    color: var(--md-on-primary);
    transform: scale(1.05);
}

.modal-nav {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    transform: translateY(-50%);
    pointer-events: none;
}

.modal-prev, .modal-next {
    background-color: var(--md-surface-variant);
    color: var(--md-on-surface);
    border: none;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
    margin: 0 24px;
    box-shadow: var(--md-elevation-2);
    pointer-events: all;
}

.modal-prev:hover, .modal-next:hover {
    background-color: var(--md-primary);
    color: var(--md-on-primary);
    transform: scale(1.05);
    box-shadow: var(--md-elevation-3);
}

/* Animation for gallery items */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.gallery-item {
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0.0, 0.2, 1) forwards;
    opacity: 0;
}

/* Staggered animation delays */
.gallery-item:nth-child(1) { animation-delay: 0.1s; }
.gallery-item:nth-child(2) { animation-delay: 0.15s; }
.gallery-item:nth-child(3) { animation-delay: 0.2s; }
.gallery-item:nth-child(4) { animation-delay: 0.25s; }
.gallery-item:nth-child(5) { animation-delay: 0.3s; }
.gallery-item:nth-child(6) { animation-delay: 0.35s; }
.gallery-item:nth-child(7) { animation-delay: 0.4s; }
.gallery-item:nth-child(8) { animation-delay: 0.45s; }
.gallery-item:nth-child(9) { animation-delay: 0.5s; }
.gallery-item:nth-child(10) { animation-delay: 0.55s; }
.gallery-item:nth-child(11) { animation-delay: 0.6s; }
.gallery-item:nth-child(12) { animation-delay: 0.65s; }
.gallery-item:nth-child(13) { animation-delay: 0.7s; }
.gallery-item:nth-child(14) { animation-delay: 0.75s; }
.gallery-item:nth-child(15) { animation-delay: 0.8s; }

.company-link-container {
    text-align: center;
    margin-top: 64px;
}

.company-link {
    display: inline-flex;
    align-items: center;
    background-color: var(--md-primary);
    color: var(--md-on-primary);
    padding: 16px 32px;
    border-radius: 28px;
    font-weight: 500;
    font-size: 16px;
    letter-spacing: 0.25px;
    transition: all 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: var(--md-elevation-2);
    position: relative;
    overflow: hidden;
}

.company-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.08);
    opacity: 0;
    transition: opacity 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.company-link:hover {
    background-color: var(--md-secondary);
    transform: translateY(-1px);
    box-shadow: var(--md-elevation-3);
}

.company-link:hover::before {
    opacity: 1;
}

.company-link i {
    margin-right: 12px;
}

/* Footer */
.footer {
    background-color: var(--md-surface);
    color: var(--md-on-surface);
    padding: 64px 32px 32px;
    text-align: center;
    border-top-left-radius: 48px;
    border-top-right-radius: 48px;
    margin-top: 80px;
    box-shadow: var(--md-elevation-3);
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.footer .copyright {
    font-size: 14px;
    color: var(--md-on-surface-variant);
    margin-top: 24px;
    letter-spacing: 0.25px;
    line-height: 1.5;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .back-button {
        position: static;
        margin-bottom: 24px;
        display: inline-flex;
    }
    
    header {
        padding: 32px 0;
    }
    
    .gallery-container {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 16px;
        padding: 16px;
    }
    
    .modal-content {
        max-width: 95%;
    }
    
    section {
        padding: 48px 0;
    }
    
    .section-title {
        font-size: 1.75rem;
        margin-bottom: 32px;
    }
}

@media (max-width: 480px) {
    .tech-stack {
        gap: 8px;
    }
    
    .tech {
        font-size: 11px;
        padding: 6px 12px;
    }
    
    .gallery-container {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 12px;
    }
    
    .gallery-caption {
        padding: 12px;
        font-size: 12px;
    }
    
    .modal-prev, .modal-next {
        width: 44px;
        height: 44px;
        font-size: 18px;
        margin: 0 12px;
    }
    
    .company-link {
        padding: 14px 28px;
        font-size: 14px;
    }
    
    .footer {
        padding: 48px 16px 24px;
        border-top-left-radius: 32px;
        border-top-right-radius: 32px;
    }
}