:root {
    --bg-dark: #0a0b10;
    --panel-bg: rgba(17, 19, 26, 0.8);
    --border-color: rgba(255, 255, 255, 0.1);
    --accent-primary: #00d2ff;
    --accent-secondary: #3a7bd5;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --success: #10b981;
    --danger: #ef4444;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(0, 210, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(58, 123, 213, 0.05) 0%, transparent 40%);
}

.glass-container {
    width: 90vw;
    height: 90vh;
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.8);
    overflow: hidden;
}

header {
    padding: 1.5rem 2.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-section h1 {
    font-size: 1.4rem;
    font-weight: 600;
    background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.pulse-icon {
    width: 10px;
    height: 10px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(0, 210, 255, 0.7);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(0, 210, 255, 0.7);
    }

    70% {
        transform: scale(1);
        box-shadow: 0 0 0 10px rgba(0, 210, 255, 0);
    }

    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(0, 210, 255, 0);
    }
}

.status-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.3);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.status-dot {
    width: 6px;
    height: 6px;
    background: var(--danger);
    border-radius: 50%;
}

.status-dot.healthy {
    background: var(--success);
}

main {
    flex: 1;
    display: flex;
    overflow: hidden;
    padding: 1.5rem 2.5rem;
    gap: 2.5rem;
    height: 0;
    /* Force children to respect parent flex height */
}

.input-panel,
.output-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 0;
    min-height: 0;
    height: 100%;
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.output-actions {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.helper-text {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.upload-zone.drag-over {
    border-color: var(--accent-primary);
    background: rgba(0, 210, 255, 0.05);
}

textarea {
    flex: 1;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.2rem;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    resize: none;
    outline: none;
    transition: border-color 0.3s ease;
}

textarea:focus {
    border-color: var(--accent-primary);
}

.action-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.primary-btn {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.primary-btn:hover {
    transform: translateY(-1px);
    opacity: 0.9;
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.5rem 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
}

.text-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.9rem;
}

.text-btn:hover {
    color: var(--text-main);
}

.diff-view {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.result-box {
    flex: 1;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.2rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    overflow-y: auto;
    white-space: pre-wrap;
    min-height: 0;
}

.entity-highlight {
    background: rgba(0, 210, 255, 0.15);
    border-bottom: 2px solid var(--accent-primary);
    padding: 2px 4px;
    border-radius: 4px;
    cursor: help;
    transition: background 0.2s ease;
}

.entity-highlight:hover {
    background: rgba(0, 210, 255, 0.3);
}

.entity-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
}

.legend-item {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 6px;
    background: var(--border-color);
    display: flex;
    align-items: center;
    gap: 6px;
}

.legend-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-primary);
}

footer {
    padding: 1.2rem 2.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer .links {
    display: flex;
    gap: 1.5rem;
}

footer a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}

footer a:hover {
    color: var(--text-main);
}

/* Loader */
.loader {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

[hidden] {
    display: none !important;
}