:root {
    --bg-color: #0d1117;
    /* Github Dark Dimmed-ish */
    --card-bg: #161b22;
    --border-color: #30363d;
    --primary-color: #58a6ff;
    --primary-hover: #79c0ff;
    --text-main: #c9d1d9;
    --text-muted: #8b949e;
    --accent-green: #238636;
    --danger-red: #da3633;
    --danger-hover: #f85149;

    --font-ui: 'Inter', system-ui, -apple-system, sans-serif;
    --font-code: 'JetBrains Mono', monospace;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-ui);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 2rem;
}

.app-container {
    width: 100%;
    max-width: 1200px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Header */
.app-header {
    text-align: center;
    margin-bottom: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Input Section */
.input-section {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.input-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.1);
}

.input-tabs button {
    flex: 1;
    padding: 1rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.input-tabs button:hover {
    color: var(--text-main);
}

.input-tabs button.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    background: rgba(88, 166, 255, 0.05);
}

.input-area {
    padding: 1.5rem;
    min-height: 250px;
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

textarea#source-code {
    width: 100%;
    height: 200px;
    background: #0d1117;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-family: var(--font-code);
    font-size: 0.9rem;
    padding: 1rem;
    resize: vertical;
    outline: none;
}

textarea#source-code:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.2);
}

/* Drop Zone */
.drop-zone {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    color: var(--text-muted);
    transition: all 0.2s;
    background: rgba(255, 255, 255, 0.01);
}

.drop-zone.drag-over {
    border-color: var(--primary-color);
    background: rgba(88, 166, 255, 0.05);
    color: var(--primary-color);
}

.drop-zone svg {
    margin-bottom: 1rem;
    opacity: 0.7;
}

.or-divider {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 1rem 0;
    opacity: 0.5;
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}

.btn-secondary:hover {
    border-color: var(--text-muted);
    background: rgba(255, 255, 255, 0.05);
}

.btn-secondary.danger {
    color: var(--danger-red);
    border-color: var(--danger-red);
}

.btn-secondary.danger:hover {
    background: rgba(218, 54, 51, 0.1);
    border-color: var(--danger-hover);
    color: var(--danger-hover);
}

/* Actions */
.actions {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    background: rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: var(--primary-color);
    color: #0d1117;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.1s, filter 0.2s;
}

.btn-primary:hover {
    filter: brightness(1.1);
}

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

/* Output Section */
.output-section {
    animation: fadeIn 0.4s ease-out;
}

.output-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.tab-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-bottom: none;
    padding: 0.75rem 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    font-weight: 500;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text-main);
    background: #1c2128;
}

.tab-btn.active {
    background: var(--primary-color);
    color: #0d1117;
    border-color: var(--primary-color);
    font-weight: 600;
}

.code-container {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0 var(--radius-md) var(--radius-md) var(--radius-md);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-md);
}

.code-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-color);
}

.lang-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.copy-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.2s;
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-muted);
}

.code-viewer {
    display: none;
    max-height: 600px;
    overflow: auto;
}

.code-viewer.active {
    display: block;
}

/* Prism Overrides */
pre[class*="language-"] {
    margin: 0 !important;
    border-radius: 0 !important;
    background: #0d1117 !important;
    padding: 1.5rem !important;
    font-family: var(--font-code) !important;
    font-size: 0.9rem !important;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .input-tabs button {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
}