:root {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --surface-light: #2c2c2c;
    --text-color: #e0e0e0;
    --text-muted: #aaaaaa;
    --accent-color: #4caf50;
    --accent-hover: #45a049;
    --danger-color: #f44336;
    --danger-hover: #e53935;
    --border-color: #333333;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 900px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
}

h1 {
    margin: 0;
    color: var(--accent-color);
    font-size: 1.75rem;
}

/* Typography Helpers */
.text-center { text-align: center; }
.text-danger { color: var(--danger-color); font-weight: bold; }
.text-success { color: var(--accent-color); }
.text-muted { color: var(--text-muted); }

/* Buttons */
.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 4px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    font-family: inherit;
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

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

.btn-success:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

.btn-secondary {
    background-color: var(--surface-light);
    color: var(--text-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: #3a3a3a;
}

.btn-block {
    display: block;
    width: 100%;
    padding: 0.8rem;
    font-size: 1.1rem;
}

/* Table container */
.table-container {
    background-color: var(--surface-color);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--surface-light);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

tbody tr {
    transition: background-color 0.15s;
    cursor: pointer;
}

tbody tr:hover {
    background-color: rgba(255,255,255,0.05);
}

tbody tr.selected {
    background-color: rgba(76, 175, 80, 0.15); /* Accent tint */
    border-left: 4px solid var(--accent-color);
}

/* Controls */
.controls {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1rem;
}

/* Modal */
.modal {
    display: none; 
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    overflow: auto;
}

.modal-content {
    background-color: var(--surface-color);
    margin: 5% auto;
    border-radius: 8px;
    width: 90%;
    max-width: 1000px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    max-height: 85vh;
}

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

.modal-header h2 {
    margin: 0;
    color: var(--accent-color);
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 2rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.close-btn:hover {
    color: white;
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.help-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0;
    margin-bottom: 1.5rem;
}

/* Editor Grid */
.editor-grid-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 3fr;
    gap: 10px;
    margin-bottom: 10px;
    font-weight: bold;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.editor-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 3fr;
    gap: 10px;
    margin-bottom: 8px;
}

.editor-row input {
    background-color: var(--surface-light);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem;
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.9rem;
}

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

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface-color);
}

::-webkit-scrollbar-thumb {
    background: #555;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}