/* CSS Variables for Theme */
:root {
    --color-primary: #2E7D32;
    --color-primary-dark: #1B5E20;
    --color-primary-light: #4CAF50;
    --color-secondary: #1976D2;
    --color-secondary-dark: #0D47A1;
    --color-warning: #F57C00;
    --color-error: #D32F2F;
    --color-success: #2E7D32;
    --color-background: #FAFAFA;
    --color-surface: #FFFFFF;
    --color-text-primary: #212121;
    --color-text-secondary: #757575;
    --color-border: #E0E0E0;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header Styles */
.app-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.logo {
    flex-shrink: 0;
}

.version-badge {
    background: var(--color-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Main Content */
.main-content {
    flex: 1;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Content Layout */
.content-layout {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem 0;
}

.main-column {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* State Sections */
.state-section {
    display: none;
    animation: fadeIn var(--transition-normal);
}

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

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

/* State Card */
.state-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-md);
    text-align: center;
}

/* Layout for animation and instructions side by side */
.state-card-layout {
    display: flex;
    align-items: center;
    gap: 3rem;
    margin-bottom: 2rem;
}

.state-card-layout.vertical {
    flex-direction: column;
    align-items: center;
}

.animation-column {
    flex: 0 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    min-width: 420px;
    min-height: 555px;
}

.animation-column .state-icon {
    width: 420px;
    height: 555px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.animation-column .mode-svg {
    width: 420px !important;
    height: 555px !important;
    object-fit: contain;
}

.instruction-column {
    flex: 1;
    min-width: 0;
    text-align: left;
}

.instruction-column .state-title {
    text-align: left;
    margin-bottom: 1.5rem;
}

.instruction-column .state-description {
    text-align: left;
    margin-left: 0;
    margin-right: 0;
    max-width: none;
}

.state-icon {
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
}

/* When in horizontal layout, remove bottom margin from icon */
.state-card-layout:not(.vertical) .state-icon {
    margin-bottom: 0;
}

.usb-icon {
    color: var(--color-primary);
}

.animated-pulse {
    animation: pulse 2s infinite;
}

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

.state-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.state-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.primary-button, .secondary-button {
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 150px;
    justify-content: center;
    text-decoration: none;
    outline: none;
}

.button-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    position: relative;
    z-index: 10;
}

.primary-button {
    background: var(--color-primary);
    color: white;
    border: none;
}

.primary-button:hover:not(:disabled) {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.secondary-button {
    background: transparent;
    color: var(--color-text-secondary);
    border: 2px solid var(--color-border);
    position: relative;
    z-index: 10;
}

.secondary-button:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(46, 125, 50, 0.05);
}

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

/* Spinner */
.spinner {
    width: 64px;
    height: 64px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Detection Steps */
.detection-steps {
    max-width: 400px;
    margin: 2rem auto;
    text-align: left;
}

.step {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
}

.step:last-child {
    border-bottom: none;
}

.step-icon {
    font-size: 1.25rem;
}

.step.complete .step-icon {
    color: var(--color-success);
}

.step.active .step-icon {
    animation: pulse 1s infinite;
}

.step-text {
    flex: 1;
    color: var(--color-text-secondary);
}

.step.complete .step-text {
    color: var(--color-text-primary);
}

/* Progress Container */
.device-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

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

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

.flash-progress-container {
    margin: 2rem 0;
}

.flash-progress-bar {
    height: 8px;
    background: var(--color-border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    transition: width var(--transition-normal);
    border-radius: 4px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.progress-percent {
    font-weight: 600;
    color: var(--color-primary);
}

/* Flash Details */
.flash-details {
    background: var(--color-background);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin: 2rem 0;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
}

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

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

/* Instructions */
.instruction-steps {
    background: var(--color-background);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin: 2rem 0;
    text-align: left;
}

.instruction {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
}

.instruction-number {
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

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

/* Success/Error Icons */
.success-icon, .error-icon {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
}

/* Error State */
.error-card {
    border: 2px solid var(--color-error);
}

.error-message {
    color: var(--color-error);
    font-size: 1.125rem;
    margin-bottom: 1rem;
    text-align: left;
    line-height: 1.6;
}

.error-details {
    background: var(--color-background);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin: 1rem 0;
    text-align: left;
}

.error-details pre {
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.error-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* Completion Summary */
.completion-summary {
    background: var(--color-background);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin: 2rem 0;
}

.summary-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
}

.summary-icon {
    font-size: 1.5rem;
}

/* Help Text */
.help-text {
    margin-top: 2rem;
    text-align: left;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.help-text summary {
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: 0.5rem 0;
}

.help-text ul {
    margin-top: 1rem;
    padding-left: 1.5rem;
    color: var(--color-text-secondary);
}

.help-text li {
    padding: 0.25rem 0;
}

/* Footer */
.app-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 1.5rem;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.app-footer a {
    color: var(--color-primary);
    text-decoration: none;
}

.app-footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 1400px) {
    .main-column {
        max-width: 100%;
        padding: 0 1rem;
    }
    
    /* Stack layout on smaller screens */
    .state-card-layout {
        flex-direction: column;
        align-items: center;
    }
    
    .state-card-layout .state-icon {
        margin-bottom: 1rem;
    }
    
    .instruction-column .state-title,
    .instruction-column .state-description {
        text-align: center;
    }
    
    .instruction-column .state-description {
        margin-left: auto;
        margin-right: auto;
        max-width: 500px;
    }
}

@media (max-width: 768px) {
    .header-content,
    .main-content {
        padding: 1rem;
    }
    
    .state-card {
        padding: 2rem 1.5rem;
    }
    
    .state-title {
        font-size: 1.5rem;
    }
    
    .state-description {
        font-size: 1rem;
    }
    
    .primary-button,
    .secondary-button {
        width: 100%;
        max-width: 300px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-background: #121212;
        --color-surface: #1E1E1E;
        --color-text-primary: #FFFFFF;
        --color-text-secondary: #B0B0B0;
        --color-border: #333333;
    }
}