/* Modern BattrAI Design System */
:root {
    /* Primary Colors */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #60a5fa;
    --primary-dark: #1e40af;
    
    /* Secondary Colors */
    --secondary: #7c3aed;
    --secondary-hover: #6d28d9;
    
    /* Accent Colors */
    --accent: #f59e0b;
    --accent-hover: #d97706;
    
    /* Status Colors */
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Layout */
    --body-bg: var(--gray-50);
    --card-bg: var(--white);
    --sidebar-bg: var(--white);
    --navbar-bg: var(--white);
    
    /* Typography */
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-muted: var(--gray-500);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Transitions */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--body-bg);
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Modern Navbar */
.modern-navbar {
    background: var(--navbar-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.modern-navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar-brand-modern {
    font-weight: 700;
    color: var(--primary) !important;
    font-size: 1.75rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.navbar-brand-modern:hover {
    color: var(--primary-hover) !important;
    transform: scale(1.05);
}

.navbar-nav-modern .nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    padding: 0.75rem 1rem !important;
    border-radius: var(--radius);
    margin: 0 0.25rem;
    transition: var(--transition);
    position: relative;
}

.navbar-nav-modern .nav-link:hover,
.navbar-nav-modern .nav-link.active {
    color: var(--primary) !important;
    background-color: var(--primary-light);
    background-color: rgb(37 99 235 / 0.1);
}

.navbar-nav-modern .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

/* User Dropdown */
.user-dropdown {
    position: relative;
}

.user-dropdown .dropdown-toggle {
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    font-weight: 500;
}

.user-dropdown .dropdown-toggle:hover {
    background: var(--gray-200);
    border-color: var(--gray-300);
    transform: translateY(-1px);
}

.user-dropdown .dropdown-toggle::after {
    border: none;
    content: '▼';
    font-size: 0.75rem;
    margin-left: 0.25rem;
}

.user-dropdown .dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    padding: 0.5rem;
    margin-top: 0.5rem;
    min-width: 200px;
}

.user-dropdown .dropdown-item {
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
}

.user-dropdown .dropdown-item:hover {
    background: var(--gray-100);
    transform: translateX(4px);
}

.user-dropdown .dropdown-item i {
    width: 16px;
    text-align: center;
}

/* Modern Cards */
.modern-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    transition: var(--transition-slow);
    overflow: hidden;
}

.modern-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
    border-color: rgb(37 99 235 / 0.2);
}

.modern-card-header {
    padding: 1.5rem 1.5rem 0;
    border-bottom: none;
}

.modern-card-body {
    padding: 1.5rem;
}

.modern-card-footer {
    padding: 0 1.5rem 1.5rem;
    border-top: none;
}

/* Stat Cards */
.stat-card-modern {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.stat-card-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.stat-card-modern:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.stat-icon-modern {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    padding: 1rem;
    border-radius: var(--radius-lg);
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    background: rgb(37 99 235 / 0.1);
    color: var(--primary);
}

.stat-value-modern {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label-modern {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Modern Buttons */
.btn-modern {
    font-weight: 600;
    border-radius: var(--radius);
    padding: 0.75rem 1.5rem;
    border: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    cursor: pointer;
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
}

.btn-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-modern:hover::before {
    left: 100%;
}

.btn-primary-modern {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary-modern:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-hover), var(--primary));
}

.btn-secondary-modern {
    background: var(--white);
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary-modern:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-success-modern {
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
}

.btn-success-modern:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-sm-modern {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-lg-modern {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* Modern Sidebar */
.modern-sidebar {
    background: var(--sidebar-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    padding: 1.5rem;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.sidebar-section {
    margin-bottom: 2rem;
}

.sidebar-section:last-child {
    margin-bottom: 0;
}

.sidebar-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sidebar-nav-link {
    color: var(--text-secondary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
    position: relative;
}

.sidebar-nav-link:hover {
    background: var(--gray-100);
    color: var(--primary);
    transform: translateX(4px);
}

.sidebar-nav-link.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    background: rgb(37 99 235 / 0.1);
    color: var(--primary);
    font-weight: 600;
}

.sidebar-nav-link.active::after {
    content: '';
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
}

.sidebar-nav-link i {
    width: 20px;
    text-align: center;
}

/* Quick Actions */
.quick-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.quick-action-btn {
    width: 100%;
    justify-content: center;
}

/* Modern Form Elements */
.form-control-modern {
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    transition: var(--transition);
    background: var(--white);
}

.form-control-modern:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.form-label-modern {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: block;
}

/* Modern Progress Bar */
.progress-modern {
    height: 0.75rem;
    background: var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.progress-bar-modern {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: var(--radius-lg);
    transition: width 1s ease-in-out;
    position: relative;
    overflow: hidden;
}

.progress-bar-modern::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-image: linear-gradient(
        -45deg,
        rgba(255, 255, 255, .2) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, .2) 50%,
        rgba(255, 255, 255, .2) 75%,
        transparent 75%,
        transparent
    );
    background-size: 1rem 1rem;
    animation: progress-bar-stripes 1s linear infinite;
}

@keyframes progress-bar-stripes {
    0% { background-position: 1rem 0; }
    100% { background-position: 0 0; }
}

/* Modern Tables */
.table-modern {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
}

.table-modern th {
    background: var(--gray-50);
    padding: 1rem 1.5rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--gray-200);
    font-size: 0.875rem;
}

.table-modern td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--gray-100);
    color: var(--text-secondary);
}

.table-modern tbody tr:hover {
    background: var(--gray-50);
}

.table-modern tbody tr:last-child td {
    border-bottom: none;
}

/* Modern Badges */
.badge-modern {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: 1px solid transparent;
}

.badge-primary-modern {
    background: rgb(37 99 235 / 0.1);
    color: var(--primary);
    border-color: rgb(37 99 235 / 0.2);
}

.badge-success-modern {
    background: rgb(16 185 129 / 0.1);
    color: var(--success);
    border-color: rgb(16 185 129 / 0.2);
}

.badge-warning-modern {
    background: rgb(245 158 11 / 0.1);
    color: var(--warning);
    border-color: rgb(245 158 11 / 0.2);
}

.badge-danger-modern {
    background: rgb(239 68 68 / 0.1);
    color: var(--danger);
    border-color: rgb(239 68 68 / 0.2);
}

/* Modern Alerts */
.alert-modern {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid;
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.alert-success-modern {
    background: var(--success-light);
    border-color: var(--success);
    color: #065f46;
}

.alert-warning-modern {
    background: var(--warning-light);
    border-color: var(--warning);
    color: #92400e;
}

.alert-danger-modern {
    background: var(--danger-light);
    border-color: var(--danger);
    color: #991b1b;
}

.alert-info-modern {
    background: var(--info-light);
    border-color: var(--info);
    color: #1e40af;
}

/* Modern Loading States */
.loading-spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.skeleton {
    background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: var(--radius);
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .modern-sidebar {
        position: static;
        margin-bottom: 2rem;
    }
    
    .stat-card-modern {
        padding: 1.5rem 1rem;
    }
    
    .stat-icon-modern {
        font-size: 2rem;
    }
    
    .stat-value-modern {
        font-size: 1.75rem;
    }
    
    .navbar-nav-modern {
        padding: 1rem 0;
    }
    
    .navbar-nav-modern .nav-link {
        padding: 1rem !important;
        margin: 0.25rem 0;
    }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.glass-effect {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.8);
}

.shadow-modern {
    box-shadow: var(--shadow);
}

.shadow-modern-lg {
    box-shadow: var(--shadow-lg);
}

.rounded-modern {
    border-radius: var(--radius-lg);
}

.transition-modern {
    transition: var(--transition);
}

.hover-lift {
    transition: var(--transition);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

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

.text-muted-modern {
    color: var(--text-muted);
}

.bg-primary-modern {
    background: var(--primary);
}

.bg-secondary-modern {
    background: var(--gray-100);
}