:root {
    --bg-color: #0f172a;
    --panel-bg: rgba(30, 41, 59, 0.7);
    --panel-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --accent-color: #8b5cf6;
    --success-color: #10b981;
    --terminal-bg: #020617;
    --font-sans: 'Inter', 'Noto Sans KR', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    padding: 1.5rem;
    gap: 1.5rem;
}

.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--panel-border);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

/* Sidebar */
.sidebar {
    width: 340px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 10px; }

header { margin-bottom: 2rem; }

.gradient-text {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.25rem;
}

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

.form-section {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.form-section h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-main);
    font-weight: 600;
}

.input-group {
    margin-bottom: 1rem;
}

.input-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

select {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--panel-border);
    color: var(--text-main);
    padding: 0.75rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 16px;
}

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

select[multiple] {
    background-image: none;
    height: auto;
    padding: 0.5rem;
}

select[multiple] option {
    padding: 0.5rem;
    margin-bottom: 2px;
    border-radius: 4px;
}

select[multiple] option:checked {
    background-color: var(--primary-color);
    color: white;
}

select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

select option {
    background-color: var(--bg-color);
}

/* Toggles */
.toggle-group {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
}

.toggle-label {
    margin-left: 0.75rem;
    font-size: 0.9rem;
    color: #e2e8f0;
}

.toggle {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(255,255,255,0.1);
    transition: .3s;
    border-radius: 24px;
    border: 1px solid var(--panel-border);
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-main);
    transition: .3s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

/* Buttons */
.btn-primary {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: rgba(255,255,255,0.1);
    border: 1px solid var(--panel-border);
    color: var(--text-main);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: 0.2s;
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255,255,255,0.15);
}

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.loader-spinner {
    display: none;
    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 { 100% { transform: rotate(360deg); } }

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow: hidden;
}

/* Status Section */
.status-section {
    padding: 1.5rem;
}

.status-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.status-header h2 {
    font-size: 1.2rem;
    font-weight: 600;
}

.badge {
    background: rgba(255,255,255,0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid var(--panel-border);
}

.badge.active {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
    border-color: rgba(16, 185, 129, 0.3);
}

.progress-container {
    width: 100%;
}

.progress-bar-bg {
    width: 100%;
    height: 8px;
    background: rgba(0,0,0,0.3);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 4px;
    transition: width 0.3s ease;
    position: relative;
}

.progress-bar-fill::after {
    content: "";
    position: absolute;
    top: 0; left: 0; bottom: 0; right: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Bottom Panels */
.bottom-panels {
    display: flex;
    gap: 1.5rem;
    flex: 1;
    overflow: hidden;
}

/* Log Section */
.log-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
}

.log-section h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
}

.terminal {
    flex: 1;
    background: var(--terminal-bg);
    border-radius: 8px;
    padding: 1rem;
    font-family: 'Consolas', monospace;
    font-size: 0.85rem;
    overflow-y: auto;
    border: 1px solid var(--panel-border);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.terminal::-webkit-scrollbar { width: 6px; }
.terminal::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 10px; }

.log-entry { color: #cbd5e1; line-height: 1.4; }
.log-entry.system { color: #8b5cf6; }
.log-entry.info { color: #3b82f6; }
.log-entry.success { color: #10b981; }
.log-entry.warning { color: #f59e0b; }
.log-entry.error { color: #ef4444; }

.log-time {
    color: #64748b;
    margin-right: 8px;
}

/* Preview Section */
.preview-section {
    flex: 2;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    min-width: 0;
    min-height: 0;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.table-container {
    flex: 1;
    width: 100%;
    min-height: 0;
    overflow: scroll;
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    scrollbar-width: auto;
    scrollbar-color: rgba(255,255,255,0.4) rgba(0,0,0,0.2);
}

.table-container::-webkit-scrollbar { width: 16px; height: 16px; }
.table-container::-webkit-scrollbar-track { background: rgba(0, 0, 0, 0.3); border-radius: 8px; }
.table-container::-webkit-scrollbar-thumb { 
    background: rgba(255, 255, 255, 0.5); 
    border-radius: 8px; 
    border: 4px solid var(--panel-bg); 
}
.table-container::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.7); }
.table-container::-webkit-scrollbar-corner { background: transparent; }

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    white-space: nowrap;
}

th, td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

th {
    background: rgba(15, 23, 42, 0.8);
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.85rem;
    position: sticky;
    top: 0;
    backdrop-filter: blur(4px);
    z-index: 10;
}

th:first-child, td:first-child {
    position: sticky;
    left: 0;
    z-index: 12;
    background: rgba(15, 23, 42, 0.95);
    border-right: 1px solid var(--panel-border);
}

th:first-child {
    z-index: 20; /* above other sticky headers */
}

td {
    font-size: 0.9rem;
    color: #e2e8f0;
}

tr:hover td {
    background-color: rgba(255,255,255,0.02);
}

tr:hover td:first-child {
    background-color: rgba(30, 41, 59, 0.95); /* matching hover for sticky col */
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 3rem !important;
    font-style: italic;
}

/* Modal Overlay & Content */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    width: 400px;
    max-width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 1.5rem;
    position: relative;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 1rem;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.btn-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

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