:root {
    /* Color Palette - Minimalist Developer Theme */
    --bg-color: #000000;
    --surface: #0a0a0a;
    --surface-hover: #1a1a1a;
    --surface-input: #111111;

    --border-color: #222222;
    --border-hover: #444444;
    --border-focus: #ffffff;

    --text-primary: #ededed;
    --text-secondary: #888888;
    --text-muted: #555555;

    --accent: #ffffff;

    /* Typography */
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', Courier, monospace;

    /* Effects */
    --shadow-subtle: 0 4px 24px rgba(0, 0, 0, 0.5);
    --transition: all 0.15s ease-in-out;
    --radius-lg: 12px;
    --radius-md: 8px;
    --radius-sm: 4px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-ui);
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    overflow-x: hidden;
    line-height: 1.5;
    position: relative;
    selection-background: var(--text-secondary);
    selection-color: var(--bg-color);
}

::selection {
    background: var(--text-secondary);
    color: var(--bg-color);
}

/* Subtle grid background for developer feel */
.line-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image:
        linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(circle at center top, black 40%, transparent 100%);
    -webkit-mask-image: radial-gradient(circle at center top, black 40%, transparent 100%);
    pointer-events: none;
}

.app-container {
    width: 100%;
    max-width: 1000px;
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 3rem;
    min-height: 100vh;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 0.5rem;
}

.logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.logo i {
    font-size: 2rem;
    color: var(--text-primary);
}

.header h1 {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 500;
    letter-spacing: -0.05em;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 400;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Controls Panel */
.controls-panel {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    align-items: end;
}

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

.input-group label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: lowercase;
}

input[type="text"],
select {
    width: 100%;
    background: var(--surface-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-ui);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

input[type="text"]:hover,
select:hover {
    border-color: var(--border-hover);
}

input[type="text"]:focus,
select:focus {
    border-color: var(--border-focus);
    background: var(--bg-color);
}

.select-wrapper {
    position: relative;
    width: 100%;
}

select {
    appearance: none;
    -webkit-appearance: none;
    padding-right: 2.5rem;
    cursor: pointer;
}

.select-wrapper i {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition);
}

.select-wrapper:focus-within i {
    color: var(--text-primary);
}

/* Output Panel */
.output-panel {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-color);
    box-shadow: var(--shadow-subtle);
    overflow: hidden;
    min-height: 400px;
}

.output-header {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
}

.window-controls {
    display: flex;
    gap: 0.5rem;
    justify-self: start;
}

.control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--border-hover);
    transition: var(--transition);
}

.output-panel:hover .control.close {
    background-color: #ff5f56;
}

.output-panel:hover .control.minimize {
    background-color: #ffbd2e;
}

.output-panel:hover .control.maximize {
    background-color: #27c93f;
}

.window-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    justify-self: center;
}

.copy-btn {
    justify-self: end;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-ui);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--transition);
}

.copy-btn:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.copy-btn.copied {
    color: var(--bg-color);
    background: var(--text-primary);
}

.output-container {
    padding: 2rem;
    flex: 1;
    background: var(--bg-color);
    overflow: auto;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.output-container::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.output-container::-webkit-scrollbar-track {
    background: var(--bg-color);
}

.output-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

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

pre {
    font-family: var(--font-mono);
    font-size: 1rem;
    line-height: 1.1;
    color: var(--text-primary);
    white-space: pre;
    margin: 0;
    transition: opacity 0.2s ease;
}

/* Loading Spinner */
.loading-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    color: var(--text-secondary);
    z-index: 10;
    transition: opacity 0.2s ease;
}

.hidden {
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
}

.output-container.loading pre {
    opacity: 0.2;
}

.output-container.loading .loading-spinner {
    opacity: 1;
    visibility: visible;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.creator-link {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    z-index: 100;
}

.creator-link:hover {
    color: var(--text-primary);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .controls-panel {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .output-panel {
        min-height: 300px;
    }

    pre {
        font-size: 0.75rem;
    }
}