:root {
    --bg-color: #09090b;
    --sidebar-bg: #09090b;
    --text-color: #fafafa;
    --muted-text: #9ca3af;
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;
    --border-color: rgba(255, 255, 255, 0.1);
    --card-bg: #18181b;
    --card-border: rgba(255, 255, 255, 0.05);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    height: 100vh;
    overflow: hidden;
}

#app {
    display: flex;
    width: 100vw;
    height: 100vh;
}

.sidebar {
    width: 256px;
    background-color: var(--sidebar-bg);
    padding: 1.5rem 0;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.sidebar h2 {
    font-weight: 600;
    font-size: 1.125rem;
    letter-spacing: -0.025em;
}

.pill {
    font-size: 0.625rem;
    font-weight: bold;
    color: #34d399;
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sidebar nav {
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sidebar button {
    background: transparent;
    border: none;
    color: var(--muted-text);
    padding: 0.5rem 0.75rem;
    text-align: left;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background 0.2s, color 0.2s;
}

.sidebar button:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
}

.sidebar button.active {
    background-color: rgba(255, 255, 255, 0.05);
    color: #fff;
}

.content {
    flex: 1;
    padding: 2rem 2.5rem;
    overflow-y: auto;
    background-color: var(--bg-color);
}

.view {
    display: none;
    max-width: 800px;
    margin: 0 auto;
}

.active-view {
    display: block;
    animation: fadeIn 0.4s ease-out;
}

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

header {
    margin-bottom: 2rem;
}

header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.025em;
    margin-bottom: 0.25rem;
}

header p {
    font-size: 0.875rem;
    color: var(--muted-text);
}

.tool-container {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

input[type="file"] {
    display: block;
    padding: 2rem 1rem;
    text-align: center;
    border: 1px dashed rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.02);
    transition: border-color 0.2s, background-color 0.2s;
    color: var(--muted-text);
    font-size: 0.875rem;
}

input[type="file"]:hover {
    border-color: var(--accent-color);
    background-color: rgba(37, 99, 235, 0.05);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--muted-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-group input, .input-group select {
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: #09090b;
    color: var(--text-color);
    font-size: 0.875rem;
}

.btn {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    border: none;
    transition: background 0.2s, transform 0.1s, opacity 0.2s;
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn.primary {
    background-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 10px 15px -3px rgba(30, 58, 138, 0.2);
}

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

.btn.secondary {
    background-color: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
    box-shadow: none;
}

.btn.secondary:hover {
    background-color: rgba(59, 130, 246, 0.3);
}

.output-area {
    width: 100%;
    min-height: 250px;
    max-height: 500px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    white-space: pre-wrap;
    overflow-y: auto;
    font-size: 0.875rem;
    color: #d1d5db;
    line-height: 1.6;
    display: none;
}

.hidden { display: none !important; }

.options-panel {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background-color: rgba(255,255,255,0.03);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.opt-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--muted-text);
    cursor: pointer;
}

.opt-label input[type="checkbox"] {
    accent-color: var(--accent-color);
    width: 1rem;
    height: 1rem;
}

.file-list {
    list-style: none;
    padding: 0;
}
.file-list li {
    padding: 0.75rem 1rem;
    background-color: #09090b;
    margin-bottom: 0.5rem;
    border-radius: 6px;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: transparent; 
}
::-webkit-scrollbar-thumb {
    background: var(--border-color); 
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #888; 
}