:root {
    --bg-dark: #1e1e2e;
    --bg-darker: #181825;
    --bg-panel: #313244;
    --text-main: #cdd6f4;
    --text-muted: #a6adc8;
    --accent-green: #a6e3a1;
    --accent-blue: #89b4fa;
    --accent-red: #f38ba8;
    --border-color: #45475a;

    --radius-lg: 12px;
    --radius-md: 8px;
    --radius-sm: 6px;

    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--bg-darker);
    border-bottom: 2px solid var(--border-color);
}

.header-content h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-right: 15px;
    display: inline-block;
    color: var(--text-main);
}

.header-content .subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
}

.logo-icon {
    font-size: 1.8rem;
    color: var(--accent-blue);
}

.github-link {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    background-color: var(--bg-panel);
    transition: all 0.2s;
}

.github-link:hover {
    background-color: var(--border-color);
    color: white;
}

/* Main Layout */
.app-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    padding: 20px;
    flex: 1;
}

@media (max-width: 900px) {
    .app-main {
        grid-template-columns: 1fr;
    }
}

.editor-section {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-panel);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    min-height: 600px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background-color: rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--border-color);
}

.section-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-blue);
}

.output-section .section-header h2 {
    color: var(--accent-green);
}

.controls {
    display: flex;
    gap: 10px;
    transition: opacity 0.3s ease;
    flex-wrap: wrap;
}

/* Inputs & Buttons */
.modern-input,
.modern-select {
    background-color: var(--bg-darker);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
}

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

.btn-primary {
    background-color: var(--accent-blue);
    color: var(--bg-darker);
    border: none;
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

.icon-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.icon-btn.success:hover {
    background-color: var(--accent-green);
    color: var(--bg-darker);
    border-color: var(--accent-green);
}

.icon-btn.danger:hover {
    background-color: var(--accent-red);
    color: var(--bg-darker);
    border-color: var(--accent-red);
}

/* Editors */
.editor-container {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
}

.code-editor {
    flex: 1;
    width: 100%;
    background-color: transparent;
    color: var(--text-main);
    border: none;
    padding: 20px;
    resize: none;
    font-family: 'Fira Code', monospace;
    font-size: 14px;
    line-height: 1.5;
    outline: none;
}

.code-editor::placeholder {
    color: var(--text-muted);
    opacity: 0.5;
}

/* Custom Scrollbar for Textareas */
.code-editor::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

.code-editor::-webkit-scrollbar-track {
    background: transparent;
}

.code-editor::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

.code-editor::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}


/* Output Empty State */
.empty-state {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    opacity: 0.6;
    gap: 15px;
}

.empty-state i {
    font-size: 3rem;
    color: var(--accent-green);
}

/* Force hide all advanced converter option panels since user requested simplified UI */
#converterInputDiv,
[for="converterInput"],
#converterClassInput,
#converterClassInputReadOnly,
#converterFunctionInput,
#converterFunctionInputReadOnly {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    width: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    position: absolute;
}

/* Footer */
.app-footer {
    padding: 15px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-darker);
}