:root {
    --bg-dark: #0f1115;
    --bg-panel: #16181d;
    --bg-elevated: #1e2128;
    --border: #2a2e37;
    --border-hover: #3e4451;

    --text-primary: #e6e8ec;
    --text-secondary: #8b92a5;

    --accent: #3b82f6;
    --accent-hover: #2563eb;

    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);

    --warning: #eab308;
    --warning-bg: rgba(234, 179, 8, 0.1);

    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);

    --radius: 8px;
    --font-sans: 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    height: 100vh;
    overflow: hidden;
    line-height: 1.5;
}

.app-layout {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.125rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.legend {
    display: flex;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.blob {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.blob.success {
    background: var(--success);
}

.blob.danger {
    background: var(--danger);
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.4);
}

.blob.warning {
    background: var(--warning);
}

/* Main Workspace */
.main-workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* 3-Column Inputs */
.sources-panel {
    display: flex;
    height: 25%;
    min-height: 180px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.source-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
}

.source-col:last-child {
    border-right: none;
}

.col-header {
    padding: 0.5rem 1rem;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.col-header h3 {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.col-header .count {
    font-size: 0.75rem;
    background: var(--border);
    padding: 0.125rem 0.5rem;
    border-radius: 10px;
    color: var(--text-secondary);
}

textarea {
    flex: 1;
    background: transparent;
    border: none;
    padding: 1rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    resize: none;
    outline: none;
    line-height: 1.6;
}

textarea::placeholder {
    color: var(--border-hover);
}

/* Matrix Resolution Panel */
.resolution-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-panel);
    overflow: hidden;
}

.panel-header {
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-elevated);
}

.panel-header h2 {
    font-size: 0.875rem;
    font-weight: 600;
}

.panel-header .actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.matrix-container {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Empty State */
.empty-state {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    gap: 1rem;
}

/* Matrix Row */
.matrix-row {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    display: grid;
    grid-template-columns: 200px 1fr 200px;
    gap: 1.5rem;
    align-items: center;
    border-left: 4px solid transparent;
}

.matrix-row.status-match {
    border-left-color: var(--success);
}

.matrix-row.status-conflict {
    border-left-color: var(--danger);
}

.matrix-row.status-missing {
    border-left-color: var(--warning);
}

.row-key {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    overflow: hidden;
}

.var-name {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 600;
    color: #fff;
    word-break: break-all;
}

.status-indicator {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.7;
}

.status-match .status-indicator {
    color: var(--success);
}

.status-conflict .status-indicator {
    color: var(--danger);
}

.status-missing .status-indicator {
    color: var(--warning);
}

.status-match .status-indicator::after {
    content: "All Match";
}

.status-conflict .status-indicator::after {
    content: "Conflict";
}

.status-missing .status-indicator::after {
    content: "Missing Values";
}

.row-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.opt-btn {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    padding: 0.375rem 0.75rem;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 120px;
}

.opt-btn .env-label {
    font-size: 0.6rem;
    color: var(--accent);
    font-family: var(--font-sans);
    text-transform: uppercase;
}

.opt-btn:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.opt-btn.active {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--accent);
    color: #fff;
}

.custom-input {
    width: 100%;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.5rem;
    border-radius: 6px;
}

.custom-input:focus {
    border-color: var(--accent);
    outline: none;
}

/* Exports Panel */
.exports-panel {
    display: flex;
    height: 30%;
    min-height: 200px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

.export-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
}

.export-col:last-child {
    border-right: none;
}

.output-area {
    background: var(--bg-dark);
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--text-primary);
    transition: all 0.2s;
    font-family: inherit;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}

.btn-ghost:hover {
    background: var(--bg-elevated);
}

.btn-outline {
    border: 1px solid var(--border);
}

.btn-outline:hover {
    background: var(--bg-elevated);
    border-color: var(--text-secondary);
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.select-input {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.375rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    outline: none;
}