:root {
    --bg-primary: #0a0c0f;
    --bg-secondary: #0f1216;
    --bg-tertiary: #141820;
    --bg-panel: #161b22;
    --bg-input: #0d1117;
    
    --border-primary: #1e2530;
    --border-secondary: #2a3442;
    --border-active: #00ff88;
    
    --text-primary: #f0f4f8;
    --text-secondary: #a8b4c0;
    --text-muted: #6b7a8d;
    --text-accent: #00ff88;
    
    --accent-primary: #00ff88;
    --accent-secondary: #00cc6a;
    --accent-glow: rgba(0, 255, 136, 0.3);
    --accent-subtle: rgba(0, 255, 136, 0.1);
    
    --danger: #ff4757;
    --danger-glow: rgba(255, 71, 87, 0.3);
    --warning: #ffa502;
    --success: #00ff88;
    
    --font-mono: 'JetBrains Mono', 'IBM Plex Mono', monospace;
    
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
    
    --transition-fast: 0.1s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.4s ease;
}

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

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-mono);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.03) 2px,
        rgba(0, 0, 0, 0.03) 4px
    );
    opacity: 0.5;
}

.grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9998;
    opacity: 0.02;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%' height='100%' filter='url(%23noise)'/%3E%3C/svg%3E");
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: relative;
    z-index: 1;
}

/* ============================================
   HEADER
   ============================================ */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 20px;
    color: var(--accent-primary);
    text-shadow: 0 0 10px var(--accent-glow);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 1; text-shadow: 0 0 10px var(--accent-glow); }
    50% { opacity: 0.8; text-shadow: 0 0 20px var(--accent-glow), 0 0 30px var(--accent-glow); }
}

.logo-text {
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-primary);
}

.logo-text .accent {
    color: var(--accent-primary);
}

.status-bar {
    display: flex;
    align-items: center;
    gap: 20px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

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

.status-dot.active {
    background: var(--accent-primary);
    box-shadow: 0 0 8px var(--accent-glow);
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-label {
    color: var(--text-secondary);
}

.status-value {
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
    display: flex;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.matrix-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

.matrix-controls {
    flex-shrink: 0;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
}

.dimension-panel {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 6px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
}

.dim-control {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.dim-label {
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

.dim-input {
    width: 48px;
    padding: 5px 6px;
    background: var(--bg-input);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 14px;
    text-align: center;
    transition: var(--transition-fast);
}

.dim-input:hover {
    border-color: var(--border-secondary);
}

.dim-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-subtle);
}

.dim-separator {
    color: var(--text-secondary);
    font-size: 14px;
    padding: 0 4px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 7px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition-fast);
    text-transform: uppercase;
    white-space: nowrap;
}

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

.btn:active {
    transform: translateY(1px);
}

.btn-icon {
    font-size: 11px;
}

.btn-action {
    background: var(--accent-subtle);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-action:hover {
    background: rgba(0, 255, 136, 0.2);
    border-color: var(--accent-primary);
    box-shadow: 0 0 12px var(--accent-glow);
}

.btn-danger {
    background: rgba(255, 71, 87, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

.btn-danger:hover {
    background: rgba(255, 71, 87, 0.2);
    box-shadow: 0 0 12px var(--danger-glow);
}

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

.btn-primary:hover {
    background: var(--accent-secondary);
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    border-color: var(--border-secondary);
    color: var(--text-secondary);
}

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

.btn-ghost {
    background: transparent;
    border-color: var(--border-primary);
    color: var(--text-secondary);
}

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

.btn-large {
    padding: 10px 16px;
    font-size: 13px;
}

.btn-full {
    width: 100%;
}

/* ============================================
   MATRIX VIEWPORT
   ============================================ */
.matrix-viewport {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--border-primary);
    padding: 1px;
    min-height: 0;
    overflow: hidden;
}

/* ============================================
   MATRIX PANEL
   ============================================ */
.matrix-panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    overflow: hidden;
    min-height: 0;
    animation: fadeSlideIn 0.5s ease forwards;
}

.matrix-panel[data-matrix="A"] { animation-delay: 0.1s; }
.matrix-panel[data-matrix="B"] { animation-delay: 0.2s; }

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-primary);
    flex-shrink: 0;
}

.panel-title {
    display: flex;
    align-items: center;
    gap: 12px;
}

.matrix-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    background: var(--accent-primary);
    color: var(--bg-primary);
    font-size: 13px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    box-shadow: 0 0 15px var(--accent-glow);
}

.panel-name {
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

.panel-stats {
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.matrix-scroll {
    flex: 1;
    overflow: auto;
    padding: 4px;
    min-height: 0;
}

.matrix-scroll::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.matrix-scroll::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.matrix-scroll::-webkit-scrollbar-thumb {
    background: var(--border-secondary);
    border-radius: var(--radius-sm);
}

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

.matrix-scroll::-webkit-scrollbar-corner {
    background: var(--bg-primary);
}

/* ============================================
   MATRIX GRID
   ============================================ */
.matrix-grid {
    height: 100%;
}

.matrix-grid table {
    border-collapse: collapse;
    table-layout: fixed;
    width: 100%;
    height: 100%;
}

.matrix-grid th {
    padding: 8px 10px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-align: center;
    border: 1px solid var(--border-primary);
    white-space: nowrap;
    height: 1%;
}

.matrix-grid th.corner {
    background: var(--bg-panel);
    color: var(--text-accent);
    font-weight: 700;
    min-width: 36px;
}

.matrix-grid th.row-header {
    min-width: 36px;
}

.matrix-grid th.col-header {
    min-width: 72px;
}

.matrix-grid td {
    padding: 0;
    border: 1px solid var(--border-primary);
    background: var(--bg-input);
    position: relative;
}

.matrix-grid td::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    background: var(--accent-subtle);
    pointer-events: none;
    transition: var(--transition-fast);
}

.matrix-grid td:hover::before {
    opacity: 1;
}

.matrix-grid td.focused {
    background: rgba(0, 255, 136, 0.05);
    box-shadow: inset 0 0 0 1px var(--accent-primary);
}

.matrix-grid td.focused::before {
    opacity: 1;
}

.matrix-grid input {
    width: 100%;
    height: 100%;
    padding: 6px 8px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 500;
    text-align: right;
    position: relative;
    z-index: 1;
    transition: var(--transition-fast);
}

.matrix-grid input:focus {
    outline: none;
    color: var(--accent-primary);
}

.matrix-grid input::placeholder {
    color: var(--text-muted);
}

.matrix-grid input::-webkit-outer-spin-button,
.matrix-grid input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.matrix-grid input[type=number] {
    -moz-appearance: textfield;
}

/* Row striping */
.matrix-grid tr:nth-child(even) td {
    background: var(--bg-secondary);
}

/* ============================================
   SIDEBAR
   ============================================ */
.control-sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
}

.sidebar-section {
    padding: 16px;
    border-bottom: 1px solid var(--border-primary);
}

.sidebar-section:last-child {
    border-bottom: none;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.section-icon {
    color: var(--accent-primary);
    font-size: 11px;
}

/* ============================================
   FILE OPERATIONS
   ============================================ */
.filename-input-group {
    margin-bottom: 12px;
}

.input-label {
    display: block;
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
}

.input-wrapper {
    display: flex;
    align-items: stretch;
}

.mono-input {
    flex: 1;
    padding: 8px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border-primary);
    border-right: none;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 13px;
    transition: var(--transition-fast);
}

.mono-input:hover {
    border-color: var(--border-secondary);
}

.mono-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-subtle);
}

.input-suffix {
    display: flex;
    align-items: center;
    padding: 0 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--text-secondary);
    font-size: 12px;
    letter-spacing: 0.5px;
}

.action-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

/* ============================================
   FILE LIST
   ============================================ */
.file-list {
    margin-top: 12px;
    max-height: 200px;
    overflow-y: auto;
}

.file-list:empty::before {
    content: '[ 暂无文件 ]';
    display: block;
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
    font-size: 12px;
    letter-spacing: 1px;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    margin-bottom: 6px;
    transition: var(--transition-fast);
    animation: fadeSlideIn 0.3s ease forwards;
}

.file-item:hover {
    border-color: var(--border-secondary);
    background: var(--bg-panel);
}

.file-name {
    flex: 1;
    font-size: 12px;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-download {
    padding: 4px 8px;
    background: transparent;
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.file-download:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* ============================================
   SYSTEM INFO
   ============================================ */
.system-info {
    margin-top: auto;
    background: var(--bg-tertiary);
}

.info-grid {
    display: grid;
    gap: 10px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px dashed var(--border-primary);
}

.info-item:last-child {
    border-bottom: none;
}

.info-label {
    font-size: 11px;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.info-value {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

/* ============================================
   FOOTER
   ============================================ */
.main-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 6px 16px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    flex-shrink: 0;
}

.footer-text {
    font-size: 11px;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

.footer-divider {
    color: var(--border-secondary);
}

/* ============================================
   NOTIFICATIONS
   ============================================ */
.notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-panel);
    border: 1px solid var(--accent-primary);
    border-radius: var(--radius-md);
    box-shadow: 0 0 30px var(--accent-glow), 0 4px 20px rgba(0, 0, 0, 0.5);
    transform: translateY(120%);
    opacity: 0;
    transition: var(--transition-slow);
    z-index: 1000;
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

.notification.error {
    border-color: var(--danger);
    box-shadow: 0 0 30px var(--danger-glow), 0 4px 20px rgba(0, 0, 0, 0.5);
}

.notification.warning {
    border-color: var(--warning);
}

.notification-icon {
    color: var(--accent-primary);
    font-size: 10px;
    animation: blink 1s ease-in-out infinite;
}

.notification.error .notification-icon {
    color: var(--danger);
}

.notification.warning .notification-icon {
    color: var(--warning);
}

.notification-text {
    font-size: 13px;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

/* ============================================
   LOADING STATE
   ============================================ */
.file-loading {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 12px;
    letter-spacing: 1px;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.loading-spinner {
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 2px solid var(--border-secondary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1200px) {
    .matrix-viewport {
        grid-template-columns: 1fr;
    }
    
    .control-sidebar {
        width: 260px;
    }
}

@media (max-width: 900px) {
    .main-header {
        flex-direction: column;
        gap: 12px;
        padding: 10px 16px;
    }
    
    .header-left {
        width: 100%;
        justify-content: center;
    }
    
    .status-bar {
        display: none;
    }
    
    .main-content {
        flex-direction: column;
    }
    
    .matrix-controls {
        flex-wrap: wrap;
    }
    
    .matrix-viewport {
        grid-template-columns: 1fr;
        max-height: 50vh;
    }
    
    .control-sidebar {
        width: 100%;
        flex-direction: row;
        flex-wrap: wrap;
        overflow-y: visible;
    }
    
    .sidebar-section {
        flex: 1;
        min-width: 200px;
    }
}

@media (max-width: 600px) {
    .dimension-panel {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .logo-text {
        font-size: 12px;
    }
    
    .action-grid {
        grid-template-columns: 1fr;
    }
}