* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --pink: #FF69B4;
    --blue: #4A90E2;
    --yellow: #FFD93D;
    --light: #F8F9FA;
    --dark: #2d3436;
    --shadow: rgba(74, 144, 226, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #F8F9FA;
    min-height: 100vh;
    color: var(--dark);
}

.hidden {
    display: none !important;
}

/* Cats */
#cats-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
}

.cat {
    position: absolute;
    font-size: 2.5rem;
    cursor: pointer;
    pointer-events: all;
    transition: transform 0.2s ease;
    user-select: none;
}

.cat:hover {
    transform: scale(1.2);
}

.cat-message {
    position: absolute;
    background: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--pink);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    white-space: nowrap;
    pointer-events: none;
    z-index: 10000;
    animation: messageFloat 3s ease-out forwards;
}

@keyframes messageFloat {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(-50px);
    }
}

/* Password Screen */
.password-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--blue);
}

.password-container {
    background: white;
    padding: 3rem 2.5rem;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
    max-width: 400px;
    width: 90%;
    animation: slideIn 0.5s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.password-container h1 {
    color: var(--pink);
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.password-container p {
    color: #666;
    margin-bottom: 1.5rem;
}

.password-container input {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.password-container input:focus {
    outline: none;
    border-color: var(--pink);
    box-shadow: 0 0 0 3px rgba(255, 105, 180, 0.1);
}

.password-container button {
    width: 100%;
    padding: 1rem;
    background: var(--pink);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.password-container button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--shadow);
}

.password-container button:active {
    transform: translateY(0);
}

.error-message {
    color: #e74c3c;
    font-size: 0.9rem;
    margin-top: 0.5rem;
    min-height: 1.2rem;
}

/* Main Content */
.main-content {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

header {
    background: white;
    padding: 1.5rem 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

header h1 {
    color: var(--pink);
    font-size: 1.8rem;
}

.logout-btn {
    padding: 0.6rem 1.5rem;
    background: var(--yellow);
    color: var(--dark);
    border: none;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

.logout-btn:hover {
    transform: scale(1.05);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem 4rem;
}

/* Filter Tabs */
.filter-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.8rem 2rem;
    background: white;
    border: 2px solid var(--light);
    border-radius: 25px;
    color: var(--dark);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: var(--blue);
    color: var(--blue);
}

.tab-btn.active {
    background: var(--blue);
    color: white;
    border-color: transparent;
}

/* Gallery Grid */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.gallery-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 15px;
    overflow: hidden;
    background: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px var(--shadow);
}

.gallery-item img,
.gallery-item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 105, 180, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-item:hover .overlay {
    opacity: 1;
}

.view-btn {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Upload Section */
.upload-section {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.upload-section h2 {
    color: var(--blue);
    margin-bottom: 1.5rem;
}

.upload-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

#file-input {
    display: none;
}

#upload-btn {
    padding: 1rem 3rem;
    background: var(--pink);
    color: white;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--shadow);
}

.upload-info {
    color: #666;
    font-size: 0.9rem;
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.close-lightbox {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-size: 3rem;
    color: white;
    cursor: pointer;
    z-index: 1001;
    transition: transform 0.2s ease;
}

.close-lightbox:hover {
    transform: scale(1.1);
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#lightbox-img,
#lightbox-video {
    max-width: 100%;
    max-height: 90vh;
    border-radius: 10px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    font-size: 2rem;
    padding: 1rem 1.5rem;
    cursor: pointer;
    border-radius: 10px;
    transition: background 0.3s ease;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.prev-btn {
    left: 2rem;
}

.next-btn {
    right: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 1rem;
    }

    header h1 {
        font-size: 1.4rem;
    }

    .container {
        padding: 0 1rem 2rem;
    }

    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }

    .nav-btn {
        padding: 0.5rem 1rem;
        font-size: 1.5rem;
    }

    .prev-btn {
        left: 1rem;
    }

    .next-btn {
        right: 1rem;
    }
}