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

:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #121212;
    --bg-card: #1a1a1a;
    --border-color: #333333;
    --border-light: #242424;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #666666;
    --accent-color: #ffffff;
    --success-color: #00ff00;
    --error-color: #ff0000;
    --warning-color: #ffaa00;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Navbar */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 1px;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link.active {
    color: var(--text-primary);
    border-bottom-color: var(--accent-color);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Pages */
.page {
    display: none;
}

.page.active {
    display: block;
}

.page-header {
    margin-bottom: 3rem;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.875rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--warning-color);
    animation: pulse 2s infinite;
}

.status-badge.connected .status-dot {
    background: var(--success-color);
}

.status-badge.error .status-dot {
    background: var(--error-color);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Grid Layout */
.grid-layout {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 2rem;
}

.left-column {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.right-column {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: border-color 0.3s ease;
}

.card:hover {
    border-color: var(--border-light);
}

.card-header {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.card-header h2 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.card-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 3rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-secondary);
}

.upload-zone:hover {
    border-color: var(--accent-color);
    background: var(--bg-tertiary);
}

.upload-zone.dragover {
    border-color: var(--accent-color);
    background: var(--bg-tertiary);
    border-style: solid;
}

.upload-zone svg {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.upload-subtext {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* File Info */
.file-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.file-info svg {
    color: var(--accent-color);
    flex-shrink: 0;
}

.file-details {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-size {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.input-field {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: all 0.3s ease;
}

.input-field:focus {
    outline: none;
    border-color: var(--accent-color);
    background: var(--bg-tertiary);
}

.input-with-button {
    display: flex;
    gap: 0.5rem;
}

.input-with-button .input-field {
    flex: 1;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-text,
.btn-icon,
.btn-icon-only {
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.btn-primary {
    background: var(--accent-color);
    color: var(--bg-primary);
    border-color: var(--accent-color);
    width: 100%;
}

.btn-primary:hover:not(:disabled) {
    background: var(--text-primary);
    transform: translateY(-1px);
}

.btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-tertiary);
}

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

.btn-text {
    background: transparent;
    border: none;
    padding: 0.5rem 0.75rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

.btn-icon,
.btn-icon-only {
    background: var(--bg-secondary);
    padding: 0.75rem;
    border: 1px solid var(--border-color);
}

.btn-icon:hover,
.btn-icon-only:hover {
    border-color: var(--accent-color);
    background: var(--bg-tertiary);
}

/* Progress */
.progress-container {
    margin-bottom: 1.5rem;
}

.progress-status {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.75rem;
    border: 1px solid var(--border-color);
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
}

/* Console */
.console,
.serial-console {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    height: 300px;
    overflow-y: auto;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
}

.console::-webkit-scrollbar,
.serial-console::-webkit-scrollbar {
    width: 6px;
}

.console::-webkit-scrollbar-track,
.serial-console::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

.console::-webkit-scrollbar-thumb,
.serial-console::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.console::-webkit-scrollbar-thumb:hover,
.serial-console::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.console-line {
    margin-bottom: 0.5rem;
    display: flex;
    gap: 0.75rem;
}

.console-prefix {
    color: var(--success-color);
    font-weight: 700;
}

.console-message {
    color: var(--text-secondary);
    word-break: break-word;
}

.console-message.success {
    color: var(--success-color);
}

.console-message.error {
    color: var(--error-color);
}

.console-message.warning {
    color: var(--warning-color);
}

.console-message.info {
    color: var(--text-primary);
}

/* Files List */
.files-list {
    max-height: 300px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
}

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

.file-item-info {
    flex: 1;
    min-width: 0;
}

.file-item-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-item-meta {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.file-item-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-sm {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem 1rem;
}

/* Serial Console Page */
.serial-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
}

.serial-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.serial-buttons .btn-primary,
.serial-buttons .btn-secondary {
    flex: 1;
    min-width: 120px;
}

.serial-console-card {
    display: flex;
    flex-direction: column;
}

.serial-console {
    flex: 1;
    height: 500px;
}

.console-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.console-status.connected {
    color: var(--success-color);
}

.console-status .status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--error-color);
}

.console-status.connected .status-dot {
    background: var(--success-color);
}

.serial-input-container {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.serial-input {
    flex: 1;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

.serial-input:focus {
    outline: none;
    border-color: var(--accent-color);
    background: var(--bg-tertiary);
}

.serial-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* About Page */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

/* ProtoX Firmwares Page */
.protox-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
}

.firmware-settings-card {
    grid-row: span 2;
}

.firmware-list-card {
    grid-column: 2;
}

.protox-progress-card {
    grid-column: 2;
}

.firmware-grid {
    display: grid;
    gap: 1rem;
}

.firmware-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.firmware-item:hover {
    border-color: var(--accent-color);
    background: var(--bg-tertiary);
}

.firmware-info {
    flex: 1;
}

.firmware-name {
    font-weight: 700;
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.firmware-meta {
    display: flex;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.firmware-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.firmware-actions {
    display: flex;
    gap: 0.5rem;
}

.firmware-item.flashing {
    border-color: var(--success-color);
    background: rgba(0, 255, 0, 0.05);
}

.firmware-item.flashing .firmware-name {
    color: var(--success-color);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-text h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.about-text p {
    margin-bottom: 1rem;
}

.about-text ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1.5rem;
}

.about-text ul li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
}

.about-text ul li:before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: 700;
}

.disclaimer {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--warning-color);
    padding: 1rem;
    margin-top: 2rem;
    border-radius: 4px;
}

.disclaimer p {
    margin: 0;
    color: var(--text-secondary);
}

.version {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.version p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin: 0;
}

/* Footer */
.footer {
    margin-top: 4rem;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .grid-layout {
        grid-template-columns: 1fr;
    }
    
    .serial-layout {
        grid-template-columns: 1fr;
    }
    
    .protox-layout {
        grid-template-columns: 1fr;
    }
    
    .firmware-settings-card {
        grid-row: auto;
    }
    
    .firmware-list-card,
    .protox-progress-card {
        grid-column: auto;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .nav-container {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1.5rem;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .card {
        padding: 1rem;
    }
    
    .serial-buttons {
        flex-direction: column;
    }
    
    .serial-buttons .btn-primary,
    .serial-buttons .btn-secondary {
        width: 100%;
    }
}

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