/* ==================== Global Styles ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --danger-gradient: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
}

/* ==================== Header ==================== */
.app-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
    max-width: 2000px;
    margin: 0 auto;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-section i {
    font-size: 2rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-section h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
}

/* ==================== Container & Layout ==================== */
.container {
    display: flex;
    height: calc(100vh - 85px);
    max-width: 2000px;
    margin: 0 auto;
}

.sidebar {
    width: 380px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    overflow-y: auto;
    box-shadow: var(--shadow-md);
}

.sidebar::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 4px;
}

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

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #475569;
}

/* ==================== Control Sections ==================== */
.control-section {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1.25rem;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.control-section:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.section-header i {
    font-size: 1.25rem;
    color: #8b5cf6;
}

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

/* ==================== Form Elements ==================== */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group label i {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #8b5cf6;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

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

/* ==================== Buttons ==================== */
.btn-primary,
.btn-secondary,
.btn-action,
.btn-nav,
.btn-icon {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    width: 100%;
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-action {
    flex: 1;
    padding: 0.625rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-action:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-warning {
    background: rgba(250, 112, 154, 0.1);
    border-color: rgba(250, 112, 154, 0.3);
    color: #fa709a;
}

.btn-warning:hover {
    background: rgba(250, 112, 154, 0.2);
}

.btn-danger {
    background: rgba(255, 107, 107, 0.1);
    border-color: rgba(255, 107, 107, 0.3);
    color: #ff6b6b;
}

.btn-danger:hover {
    background: rgba(255, 107, 107, 0.2);
}

.btn-nav {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-nav:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn-icon {
    padding: 0.5rem;
    min-width: auto;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* ==================== File Upload ==================== */
.file-upload-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    padding: 1.25rem;
    background: var(--success-gradient);
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 242, 254, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

.file-upload-btn i {
    font-size: 1.5rem;
}

/* ==================== Page Navigation ==================== */
.page-navigation {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.page-info {
    flex: 1;
    text-align: center;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ==================== Action Buttons ==================== */
.action-buttons {
    display: flex;
    gap: 0.75rem;
}

/* ==================== Camera Count ==================== */
.camera-count {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-md);
    color: #a78bfa;
    font-weight: 500;
    margin-bottom: 1.25rem;
}

.camera-count i {
    font-size: 1.125rem;
}

/* ==================== Canvas Wrapper ==================== */
.canvas-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    position: relative;
}

.canvas-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.toolbar-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.toolbar-info i {
    color: #8b5cf6;
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#zoomLevel {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 50px;
    text-align: center;
}

#mainCanvas {
    flex: 1;
    background: var(--bg-primary);
    cursor: crosshair;
}

/* ==================== Responsive Design ==================== */
@media (max-width: 1200px) {
    .sidebar {
        width: 320px;
    }
    
    .header-content {
        padding: 1rem 1.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        max-height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .header-actions {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .logo-section h1 {
        font-size: 1.25rem;
    }
}