:root {
    --bg-color: #121212;
    --panel-bg: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-color: #e0e0e0;
    --accent-color: #00ff88;
    --accent-glow: 0 0 10px rgba(0, 255, 136, 0.5);
    --danger-color: #ff3366;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.app-container {
    width: 100%;
    max-width: 800px;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    backdrop-filter: blur(10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

header {
    text-align: center;
    margin-bottom: 24px;
}

header h1 {
    font-size: 2rem;
    color: #fff;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.badge {
    font-size: 0.8rem;
    background: var(--accent-color);
    color: #000;
    padding: 4px 8px;
    border-radius: 20px;
    vertical-align: middle;
    font-weight: bold;
}

header p {
    color: #aaa;
}

.tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    justify-content: center;
}

.tab-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.tab-btn.active {
    background: var(--accent-color);
    color: #000;
    border-color: var(--accent-color);
    box-shadow: var(--accent-glow);
}

.tool-section {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tool-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.settings-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
    background: rgba(0, 0, 0, 0.2);
    padding: 16px;
    border-radius: 8px;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-group label {
    font-size: 0.9rem;
    color: #bbb;
}

.setting-group select,
.setting-group input {
    width: 100%;
    padding: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: #fff;
    border-radius: 6px;
    outline: none;
}

.setting-group select:focus,
.setting-group input:focus {
    border-color: var(--accent-color);
}

.dropzone {
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: rgba(0, 0, 0, 0.2);
}

.dropzone:hover, .dropzone.dragover {
    border-color: var(--accent-color);
    background: rgba(0, 255, 136, 0.05);
}

.drop-msg {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    pointer-events: none;
}

.drop-msg svg {
    color: var(--accent-color);
}

.drop-msg p {
    font-size: 1.2rem;
    font-weight: 500;
}

.drop-msg sub {
    color: #888;
}

.hidden {
    display: none !important;
}

#processing-overlay {
    text-align: center;
    padding: 40px 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
}

.loader {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

#status-text {
    margin-bottom: 12px;
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--accent-color);
    transition: width 0.2s;
}

.log-text {
    font-family: monospace;
    font-size: 0.8rem;
    color: #888;
    background: #000;
    padding: 8px;
    border-radius: 4px;
    max-height: 100px;
    overflow-y: auto;
    text-align: left;
    word-break: break-all;
}

#result-box {
    text-align: center;
    padding: 40px 20px;
    background: rgba(0, 255, 136, 0.05);
    border: 1px solid var(--accent-color);
    border-radius: 8px;
}

#result-box h3 {
    color: var(--accent-color);
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    cursor: pointer;
    border: none;
    margin: 0 8px;
    transition: all 0.2s;
}

.btn.primary {
    background: var(--accent-color);
    color: #000;
    box-shadow: 0 4px 15px rgba(0, 255, 136, 0.2);
}

.btn.primary:hover {
    box-shadow: 0 4px 25px rgba(0, 255, 136, 0.4);
    transform: translateY(-2px);
}

.btn.secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: #fff;
}

.btn.secondary:hover {
    border-color: #fff;
}