@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');

:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --background-color: #f4f4f4;
    --card-background: #ffffff;
    --text-color: #333333;
    --overlay-background: rgba(255,255,255,0.95);
    --overlay-text: #333333;
    --transition-duration: 0.5s;
    --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
}

.dark-mode {
    --primary-color: #2980b9;
    --secondary-color: #27ae60;
    --background-color: #1a1a1a;
    --card-background: #2c2c2c;
    --text-color: #f4f4f4;
    --overlay-background: rgba(44,44,44,0.95);
    --overlay-text: #f4f4f4;
}

body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-duration) var(--transition-timing),
                color var(--transition-duration) var(--transition-timing);
}

.container {
    background-color: var(--card-background);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    overflow: hidden;
    width: 90%;
    max-width: 600px;
    position: relative;
    transition: background-color var(--transition-duration) var(--transition-timing),
                transform var(--transition-duration) var(--transition-timing),
                box-shadow var(--transition-duration) var(--transition-timing);
}

.container:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.image-container {
    position: relative;
    overflow: hidden;
    padding-top: 75%; /* 4:3 Aspect Ratio */
}

#mainImage {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-duration) var(--transition-timing);
}

.image-container:hover #mainImage {
    transform: scale(1.05);
}

.info-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--overlay-background);
    color: var(--overlay-text);
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-duration) var(--transition-timing),
                visibility var(--transition-duration) var(--transition-timing),
                background-color var(--transition-duration) var(--transition-timing),
                color var(--transition-duration) var(--transition-timing);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.image-container:hover .info-overlay {
    opacity: 1;
    visibility: visible;
}

.info-overlay h3 {
    margin: 0 0 10px 0;
    font-size: 1.2rem;
    transform: translateY(-20px);
    opacity: 0;
    transition: transform var(--transition-duration) var(--transition-timing),
                opacity var(--transition-duration) var(--transition-timing);
}

.info-overlay p {
    margin: 0 0 10px 0;
    font-size: 0.9rem;
    flex-grow: 1;
    overflow-y: auto;
    transform: translateY(20px);
    opacity: 0;
    transition: transform var(--transition-duration) var(--transition-timing),
                opacity var(--transition-duration) var(--transition-timing);
}

.image-container:hover .info-overlay h3,
.image-container:hover .info-overlay p {
    transform: translateY(0);
    opacity: 1;
}

.button-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

#newImageBtn {
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    border-radius: 30px;
    cursor: pointer;
    transition: all var(--transition-duration) var(--transition-timing);
    display: flex;
    align-items: center;
    gap: 10px;
}

#newImageBtn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255,255,255,0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-duration) var(--transition-timing),
                visibility var(--transition-duration) var(--transition-timing);
}

.dark-mode .loading-overlay {
    background-color: rgba(0,0,0,0.8);
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.spinner {
    border: 5px solid var(--background-color);
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.fade-in {
    animation: fadeIn var(--transition-duration) var(--transition-timing);
}

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

.slide-in {
    animation: slideIn var(--transition-duration) var(--transition-timing);
}

@keyframes slideIn {
    from { 
        transform: translateX(100%);
        opacity: 0;
    }
    to { 
        transform: translateX(0);
        opacity: 1;
    }
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.toggle-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
    color: var(--text-color);
    font-size: 14px;
    transition: color var(--transition-duration) var(--transition-timing);
}

.sun-icon {
    left: 10px;
}

.moon-icon {
    right: 10px;
}