:root {
    --bg: #0d1117;
    --card-bg: #161b22;
    --border: #30363d;
    --accent: #d2a8ff;
    /* Purple for stego/magic */
    --text: #c9d1d9;
    --text-dim: #8b949e;
    --success: #56d364;
    --danger: #f85149;
    --font-mono: 'JetBrains Mono', monospace;
    --font-head: 'Oswald', sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-mono);
    height: 100vh;
    overflow: hidden;
}

/* Background overlay (Grid/Dots) */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(#30363d 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.1;
    z-index: -1;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--border);
    padding-bottom: 20px;
    margin-bottom: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--accent);
}

h1 {
    font-family: var(--font-head);
    margin: 0;
    font-size: 2rem;
    letter-spacing: 1px;
}

.search-bar {
    position: relative;
    width: 300px;
}

.search-bar input {
    width: 100%;
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px 40px 10px 15px;
    border-radius: 5px;
    font-family: var(--font-mono);
}

.search-icon {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.5;
}

main {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Drop Zone */
.upload-zone {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border);
    border-radius: 10px;
    transition: all 0.3s;
    background: rgba(22, 27, 34, 0.5);
}

.upload-zone.dragover {
    border-color: var(--accent);
    background: rgba(210, 168, 255, 0.05);
}

.content {
    text-align: center;
}

.content .icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.content h2 {
    margin: 10px 0;
    color: var(--text);
}

.content p {
    color: var(--text-dim);
    margin-bottom: 20px;
}

.btn {
    background: var(--accent);
    color: #000;
    border: none;
    padding: 12px 30px;
    font-weight: bold;
    font-family: var(--font-head);
    cursor: pointer;
    border-radius: 4px;
    text-transform: uppercase;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

/* Gallery */
.gallery-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    overflow-y: auto;
    padding-right: 10px;
}

.grid-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    height: 250px;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s;
    position: relative;
}

.grid-item:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.grid-item img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    background: #000;
}

.item-info {
    padding: 10px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.item-name {
    font-weight: bold;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 5px;
}

.item-tags {
    display: flex;
    gap: 5px;
    margin-top: auto;
}

.tag {
    font-size: 0.7rem;
    padding: 2px 5px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
}

.tag.flag-found {
    background: var(--success);
    color: #000;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 100;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--bg);
    width: 90%;
    height: 90%;
    border: 1px solid var(--border);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
    position: relative;
}

.close-modal {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-dim);
}

.close-modal:hover {
    color: var(--text);
}

.split-view {
    display: flex;
    gap: 20px;
    height: 100%;
    margin-top: 10px;
}

.left-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
    border-right: 1px solid var(--border);
    padding-right: 20px;
    overflow-y: auto;
}

.left-panel img {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    border: 1px solid var(--border);
}

.right-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    margin-bottom: 15px;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-dim);
    padding: 10px 20px;
    cursor: pointer;
    font-family: var(--font-mono);
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.tab-content {
    display: none;
    flex: 1;
    overflow-y: auto;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
}

.output-box {
    background: #000;
    border: 1px solid var(--border);
    padding: 10px;
    font-size: 0.9rem;
    white-space: pre-wrap;
    height: 100%;
    overflow-y: auto;
    color: #a5d6ff;
}

.tool-section {
    background: var(--card-bg);
    padding: 15px;
    border-radius: 5px;
}

.tool-section h3 {
    margin-top: 0;
    font-size: 1rem;
    color: var(--accent);
}

.input-group {
    display: flex;
    gap: 10px;
}

#pass-input {
    flex: 1;
    background: #000;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px;
    font-family: var(--font-mono);
}

.btn-small {
    background: var(--border);
    color: var(--text);
    border: none;
    padding: 8px 15px;
    cursor: pointer;
}

.btn-small:hover {
    background: var(--text-dim);
    color: #000;
}

.pass-result {
    margin-top: 10px;
    font-size: 0.9rem;
    word-break: break-all;
}

#lsb-canvas {
    width: 100%;
    border: 1px solid var(--border);
    image-rendering: pixelated;
}

.lsb-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.chip {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-dim);
    padding: 5px 10px;
    cursor: pointer;
    font-size: 0.8rem;
}

.chip:hover {
    border-color: var(--accent);
    color: var(--accent);
}