:root {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --accent-color: #ffffff;
    --input-bg: #333;
    --btn-color: #444;
    --btn-hover: #555;
    --danger-color: #d32f2f;
    --danger-hover: #b71c1c;
}

body {
    margin: 0;
    padding: 20px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    overflow-x: hidden;
}

h1 {
    text-align: center;
    font-weight: 300;
    margin-bottom: 40px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.top-bar {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    z-index: 900;
}

.top-left-bar {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 900;
}

.filter-wrapper {
    position: relative;
    display: inline-block;
}

.filter-btn {
    background-color: var(--btn-color);
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
    width: 40px;
    height: 36px;
}

.filter-btn:hover {
    background-color: var(--btn-hover);
}

.filter-icon {
    width: 24px;
    height: 24px;
    fill: var(--text-color);
    display: block;
}

.sort-menu {
    display: none;
    position: absolute;
    top: 45px;
    left: 0;
    background-color: var(--card-bg);
    border: 1px solid #333;
    border-radius: 4px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
    min-width: 160px;
    z-index: 950;
    flex-direction: column;
}

.sort-menu.show {
    display: flex;
}

.sort-item {
    padding: 12px 15px;
    cursor: pointer;
    color: var(--text-color);
    font-size: 14px;
    transition: background 0.2s;
    text-align: left;
}

.sort-item:hover {
    background-color: var(--btn-hover);
}

.sort-item.active {
    background-color: #007acc;
    color: white;
}

.action-btn {
    background-color: var(--btn-color);
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
    text-decoration: none;
}

.action-btn:hover {
    background-color: var(--btn-hover);
}

.danger-btn {
    background-color: var(--danger-color);
}

.danger-btn:hover {
    background-color: var(--danger-hover);
}

.gallery-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    max-width: 1600px;
    margin: 0 auto;
}

.card {
    background-color: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    padding-top: 75%; 
}

.card-inner {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-inner:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.play-icon {
    position: absolute;
    top: 10px;
    left: 10px;
    width: 30px;
    height: 30px;
    background-color: rgba(0, 0, 0, 0.6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
    pointer-events: none;
}

.play-icon svg {
    width: 16px;
    height: 16px;
    fill: white;
    margin-left: 2px;
}

.check-overlay {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 50;
    cursor: pointer;
    display: block;
    user-select: none;
}

.check-overlay input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 0;
    right: 0;
    height: 25px;
    width: 25px;
    background-color: rgba(0,0,0,0.5);
    border: 2px solid #fff;
    border-radius: 4px;
}

.check-overlay:hover input ~ .checkmark {
    background-color: rgba(0,0,0,0.8);
}

.check-overlay input:checked ~ .checkmark {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.check-overlay input:checked ~ .checkmark:after {
    display: block;
}

.check-overlay .checkmark:after {
    left: 9px;
    top: 5px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 3px 3px 0;
    transform: rotate(45deg);
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    overflow: hidden;
}

.modal.show {
    opacity: 1;
}

.modal-content-wrapper {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
}

.loader {
    position: absolute;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-left: 4px solid #ffffff;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    z-index: 5;
    display: none;
}

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

.modal-content {
    max-width: 95vw;
    max-height: 95vh;
    object-fit: contain;
    box-shadow: 0 0 50px rgba(0, 0, 0, 1);
    border-radius: 2px;
    transition: transform 0.1s linear;
    cursor: zoom-in;
    user-select: none;
    z-index: 10;
}

.modal-content.zoomed {
    max-width: none;
    max-height: none;
    cursor: grab;
    transition: none; 
}

.modal-content.zoomed:active {
    cursor: grabbing;
}

.form-box {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    width: 300px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    position: relative;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 12px;
    color: #aaa;
}

.form-group input {
    width: 100%;
    padding: 8px;
    background: var(--input-bg);
    border: 1px solid #444;
    color: white;
    border-radius: 4px;
    box-sizing: border-box;
}

.submit-btn {
    width: 100%;
    padding: 10px;
    background: #007acc;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 10px;
}

.submit-btn:hover {
    background: #005f9e;
}

.progress-container {
    margin-top: 15px;
    display: none;
}

.progress-bar-bg {
    width: 100%;
    height: 10px;
    background: #333;
    border-radius: 5px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: #007acc;
    transition: width 0.2s;
}

.progress-text {
    font-size: 12px;
    color: #ccc;
    margin-top: 5px;
    text-align: center;
}

.close-btn {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 40px;
    color: #fff;
    cursor: pointer;
    z-index: 1001;
    transition: color 0.2s;
    line-height: 1;
    text-shadow: 0 2px 10px rgba(0,0,0,0.8);
}

.close-form-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    color: #aaa;
    cursor: pointer;
}

.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 50px;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    z-index: 1001;
    padding: 20px;
    user-select: none;
    transition: color 0.2s, transform 0.2s;
    text-shadow: 0 2px 10px rgba(0,0,0,0.8);
}

.nav-btn:hover {
    color: #fff;
    transform: translateY(-50%) scale(1.1);
}

.prev-btn { left: 20px; }
.next-btn { right: 20px; }

.empty-state {
    text-align: center;
    margin-top: 100px;
    color: #777;
}