:root {
    --bg-color: #2b2b2b;
    --panel-color: #3c3f41;
    --text-color: #ffffff;
    --accent-color: #3a96dd;
    --accent-hover: #307eba;
    --border-radius: 8px;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    margin: 0;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    margin-bottom: 30px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    width: 64px;
    height: 64px;
    object-fit: contain;
}

h1 {
    margin: 0;
    font-size: 1.8rem;
    letter-spacing: 0.5px;
}

.subtitle {
    margin: 5px 0 0 0;
    color: #aaaaaa;
    font-size: 0.95rem;
}

/* Drop Zone */
.drop-zone {
    background-color: var(--panel-color);
    border: 2px dashed #555;
    border-radius: var(--border-radius);
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 25px;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--accent-color);
    background-color: #45484a;
}

.drop-text {
    font-size: 1.1rem;
    font-weight: bold;
    margin: 10px 0 5px;
}

.drop-subtext {
    color: #888;
    margin: 0;
}

/* Options */
.options-panel {
    background-color: var(--panel-color);
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.format-toggles {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.toggle-btn {
    background: transparent;
    border: 1px solid #555;
    color: #aaa;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.toggle-btn.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(58, 150, 221, 0.3);
}

/* Process Button */
.process-btn {
    width: 100%;
    padding: 15px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}

.process-btn:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

.process-btn:disabled {
    background-color: #555;
    cursor: not-allowed;
    opacity: 0.7;
}

/* Status */
.status-area {
    margin-bottom: 20px;
    text-align: center;
    min-height: 24px;
}

.status-area.hidden {
    visibility: hidden;
}

#status-text {
    margin: 0;
    color: #dcdcdc;
}

.loader {
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: inline-block;
    vertical-align: middle;
    margin-right: 10px;
}

.loader.hidden {
    display: none;
}

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

/* Footer */
footer {
    border-top: 1px solid #444;
    margin-top: 40px;
    padding-top: 20px;
    text-align: center;
    color: #666;
    font-size: 0.85rem;
}

footer a {
    color: #888;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}