/* ========== CSS Reset & Base ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Dark Theme Colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --bg-hover: #404040;

    /* Text Colors */
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;

    /* Accent Colors (grayscale) */
    --border-color: #444444;
    --success: #6b6b6b;
    --warning: #8a8a8a;
    --danger: #555555;

    /* Card Colors */
    --card-bg: #2d2d2d;
    --card-border: #3a3a3a;

    /* Card Accent Colors (soft & flat) */
    --card-color-0: #5a7a8a;  /* Soft blue-gray */
    --card-color-1: #7a6a8a;  /* Soft purple-gray */
    --card-color-2: #6a8a7a;  /* Soft green-gray */
    --card-color-3: #8a7a6a;  /* Soft brown-gray */
    --card-color-4: #8a6a7a;  /* Soft pink-gray */
    --card-color-5: #6a8a8a;  /* Soft teal-gray */
    --card-color-6: #8a7a7a;  /* Soft rose-gray */
    --card-color-7: #7a8a6a;  /* Soft lime-gray */

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Transitions */
    --transition: all 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

/* ========== Layout ========== */
.container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ========== Sidebar ========== */
.sidebar {
    width: 260px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
}

.sidebar-header {
    margin-bottom: var(--spacing-xl);
}

.sidebar-logo {
    width: 100%;
    max-width: 200px;
    height: auto;
    display: block;
    margin: 0 auto;
    object-fit: contain;
}

.nav-menu {
    list-style: none;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
}

.nav-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item i {
    font-size: 1.25rem;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border-radius: 6px;
    font-size: 0.875rem;
}

.connection-status i {
    font-size: 0.5rem;
}

.connection-status i.connected {
    color: #6b6b6b;
}

.connection-status i.disconnected {
    color: #555555;
}

.sidebar-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--card-border);
    text-align: center;
}

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

.sidebar-footer strong {
    color: var(--text-secondary);
    font-weight: 600;
}

/* ========== Main Content ========== */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-xl);
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 1.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ========== Buttons ========== */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: 6px;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn:hover {
    background-color: var(--bg-hover);
}

.btn-primary {
    background-color: #4a4a4a;
}

.btn-primary:hover {
    background-color: #555555;
}

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

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

.btn-danger {
    background-color: #3a3a3a;
}

.btn-danger:hover {
    background-color: #444444;
}

.btn-icon {
    padding: var(--spacing-xs);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

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

.btn-toggle {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-toggle.active {
    background-color: #4a4a4a;
}

.btn-toggle.inactive {
    background-color: #3a3a3a;
}

/* ========== Pie Chart ========== */
.chart-container {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.chart-header {
    margin-bottom: var(--spacing-lg);
}

.chart-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.chart-wrapper {
    position: relative;
    height: 300px;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.chart-wrapper canvas {
    max-height: 300px;
}

/* ========== Cards Grid ========== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.dashboard-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
    position: relative;
}

/* Card Color Variants - Full background */
.dashboard-card.card-color-0 {
    background-color: rgba(90, 122, 138, 0.15);
    border-color: rgba(90, 122, 138, 0.3);
}

.dashboard-card.card-color-1 {
    background-color: rgba(122, 106, 138, 0.15);
    border-color: rgba(122, 106, 138, 0.3);
}

.dashboard-card.card-color-2 {
    background-color: rgba(106, 138, 122, 0.15);
    border-color: rgba(106, 138, 122, 0.3);
}

.dashboard-card.card-color-3 {
    background-color: rgba(138, 122, 106, 0.15);
    border-color: rgba(138, 122, 106, 0.3);
}

.dashboard-card.card-color-4 {
    background-color: rgba(138, 106, 122, 0.15);
    border-color: rgba(138, 106, 122, 0.3);
}

.dashboard-card.card-color-5 {
    background-color: rgba(106, 138, 138, 0.15);
    border-color: rgba(106, 138, 138, 0.3);
}

.dashboard-card.card-color-6 {
    background-color: rgba(138, 122, 122, 0.15);
    border-color: rgba(138, 122, 122, 0.3);
}

.dashboard-card.card-color-7 {
    background-color: rgba(122, 138, 106, 0.15);
    border-color: rgba(122, 138, 106, 0.3);
}

.dashboard-card:hover {
    border-color: #4a4a4a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.dashboard-card.preview {
    max-width: 350px;
}

.dashboard-card.updating {
    animation: cardUpdate 0.6s ease;
}

@keyframes cardUpdate {
    0% {
        transform: scale(1);
        border-color: var(--card-border);
        box-shadow: 0 0 0 rgba(200, 200, 200, 0);
    }
    25% {
        transform: scale(1.05);
        border-color: #888;
        box-shadow: 0 0 20px rgba(200, 200, 200, 0.6);
    }
    50% {
        transform: scale(1.05);
        border-color: #aaa;
        box-shadow: 0 0 30px rgba(220, 220, 220, 0.8);
    }
    75% {
        transform: scale(1.02);
        border-color: #888;
        box-shadow: 0 0 20px rgba(200, 200, 200, 0.4);
    }
    100% {
        transform: scale(1);
        border-color: var(--card-border);
        box-shadow: 0 0 0 rgba(200, 200, 200, 0);
    }
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-md);
}

.card-actions {
    display: flex;
    gap: 4px;
    position: relative;
}

/* Color Picker Dropdown */
.color-picker-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: var(--spacing-sm);
    display: none;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.color-picker-dropdown.active {
    display: grid;
}

.color-option {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
}

.color-option:hover {
    border-color: var(--text-primary);
    transform: scale(1.1);
}

.color-option.selected {
    border-color: var(--text-primary);
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}

.color-option-0 { background-color: rgba(90, 122, 138, 0.5); }
.color-option-1 { background-color: rgba(122, 106, 138, 0.5); }
.color-option-2 { background-color: rgba(106, 138, 122, 0.5); }
.color-option-3 { background-color: rgba(138, 122, 106, 0.5); }
.color-option-4 { background-color: rgba(138, 106, 122, 0.5); }
.color-option-5 { background-color: rgba(106, 138, 138, 0.5); }
.color-option-6 { background-color: rgba(138, 122, 122, 0.5); }
.color-option-7 { background-color: rgba(122, 138, 106, 0.5); }

.card-title {
    font-size: 1.125rem;
    margin: 0;
    flex: 1;
}

.card-title-input {
    width: 100%;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    font-size: 1.125rem;
    font-weight: 600;
}

.card-title-input:focus {
    outline: none;
    border-color: var(--text-primary);
}

.card-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.card-content {
    text-align: center;
}

.counter-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-variant-numeric: tabular-nums;
    transition: all 0.3s ease;
}

.counter-value.updating {
    animation: counterPulse 0.6s ease;
}

@keyframes counterPulse {
    0% {
        transform: scale(1);
        color: var(--text-primary);
        text-shadow: 0 0 0 rgba(255, 255, 255, 0);
    }
    25% {
        transform: scale(1.2);
        color: #ffffff;
        text-shadow: 0 0 15px rgba(255, 255, 255, 0.8);
    }
    50% {
        transform: scale(1.25);
        color: #ffffff;
        text-shadow: 0 0 25px rgba(255, 255, 255, 1);
    }
    75% {
        transform: scale(1.15);
        color: #eeeeee;
        text-shadow: 0 0 15px rgba(255, 255, 255, 0.6);
    }
    100% {
        transform: scale(1);
        color: var(--text-primary);
        text-shadow: 0 0 0 rgba(255, 255, 255, 0);
    }
}

.card-meta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.meta-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ========== Forms ========== */
.form-container {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.form-container h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 2fr auto;
    gap: var(--spacing-md);
    align-items: end;
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #4a4a4a;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
}

/* ========== Table ========== */
.table-container {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    overflow: hidden;
}

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

thead {
    background-color: var(--bg-tertiary);
}

th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

tbody tr:hover {
    background-color: var(--bg-tertiary);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8125rem;
    font-weight: 500;
}

.status-badge.active {
    background-color: #3a3a3a;
    color: #b0b0b0;
}

.status-badge.inactive {
    background-color: #2d2d2d;
    color: #808080;
}

.status-badge i {
    font-size: 0.5rem;
}

.table-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ========== Labels Grid ========== */
.labels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.label-item {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.label-item:hover {
    border-color: #4a4a4a;
}

.label-info {
    flex: 1;
}

.label-id {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.label-name {
    font-weight: 600;
    color: var(--text-primary);
}

/* ========== Empty State ========== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state p {
    font-size: 0.9375rem;
}

/* ========== Preview Section ========== */
.preview-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.preview-section h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

/* ========== Modal ========== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 999;
}

.modal-overlay.show {
    display: block;
}

.modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-xl);
    z-index: 1000;
    min-width: 400px;
}

.modal.show {
    display: block;
}

.modal-content h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.modal-content p {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        padding: var(--spacing-md);
    }

    .nav-menu {
        display: flex;
        overflow-x: auto;
    }

    .nav-item span {
        display: none;
    }

    .cards-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

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

/* ========== Serial Port Styles ========== */
.serial-status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.serial-status-item {
    background-color: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: 6px;
}

.status-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.status-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ========== Protocol Management Styles ========== */

.protocol-status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.protocol-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.2s ease;
}

.protocol-card:hover {
    border-color: var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.protocol-card-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.protocol-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.protocol-title i {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.protocol-title h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.protocol-card-body {
    padding: var(--spacing-md);
}

.protocol-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.protocol-stats .stat-item {
    text-align: center;
}

.protocol-stats .stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.protocol-stats .stat-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.protocol-info {
    padding: var(--spacing-sm);
    background-color: var(--bg-tertiary);
    border-radius: 6px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.protocol-card-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--card-border);
    display: flex;
    gap: var(--spacing-sm);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

/* Protocol status active state */
.protocol-card[data-status="running"] .protocol-card-header {
    border-left: 3px solid var(--success-color);
}

.protocol-card[data-status="error"] .protocol-card-header {
    border-left: 3px solid var(--danger-color);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .protocol-status-grid {
        grid-template-columns: 1fr;
    }
    
    .protocol-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}