/* Modern Design System - Sleek & Professional */
:root {
    /* Modern Color Palette */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-gradient-hover: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --success-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    
    /* Primary Colors */
    --primary-50: #eef2ff;
    --primary-100: #e0e7ff;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-900: #312e81;
    
    /* Neutral Colors */
    --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;
    
    /* Background System */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-elevated: #ffffff;
    --bg-gradient: linear-gradient(180deg, #ffffff 0%, #f9fafb 100%);
    --bg-gradient-dark: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    
    /* Text Colors */
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --text-light: #9ca3af;
    --text-white: #ffffff;
    
    /* Border & Divider */
    --border-color: #e5e7eb;
    --border-hover: #d1d5db;
    --border-focus: #6366f1;
    --divider: rgba(0, 0, 0, 0.06);
    
    /* Shadow System - Modern Elevation */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-colored: 0 10px 30px -5px rgba(102, 126, 234, 0.3);
    --shadow-colored-lg: 0 20px 40px -10px rgba(102, 126, 234, 0.4);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.18);
    --backdrop-blur: blur(20px);
    
    /* Spacing System */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Modern Card Styles */
.modern-card {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.modern-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.modern-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-500);
}

.modern-card:hover::before {
    opacity: 1;
}

.modern-card-elevated {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--space-xl);
    border: 1px solid transparent;
}

.modern-card-glass {
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--space-xl);
}

/* Modern Buttons */
.btn-modern {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.875rem 1.75rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.btn-modern-primary {
    background: var(--primary-gradient);
    color: var(--text-white);
    box-shadow: var(--shadow-colored);
}

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

.btn-modern-primary:active {
    transform: translateY(0);
}

.btn-modern-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.btn-modern-secondary:hover {
    border-color: var(--primary-500);
    background: var(--primary-50);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-modern-ghost {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid transparent;
}

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

/* Modern Inputs */
.modern-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    transition: all var(--transition-base);
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.modern-input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Gradient Text */
.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

/* Modern Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--space-md);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Modern Feature Grid */
.feature-grid-modern {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
}

.feature-card-modern {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.feature-card-modern:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-500);
}

.feature-card-modern:hover::before {
    transform: scaleX(1);
}

.feature-icon-modern {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-xl);
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-colored);
}

.feature-icon-modern .material-icons {
    /* COTGI px→rem original: font-size: 32px; */
font-size: 2rem;
    color: var(--text-white);
}

/* Modern Hero Section */
.hero-modern {
    background: var(--bg-gradient);
    padding: var(--space-3xl) 0;
    position: relative;
    overflow: hidden;
}

.hero-modern::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-modern::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(118, 75, 162, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

/* Modern Pricing Cards */
.pricing-card-modern {
    background: var(--bg-elevated);
    border-radius: var(--radius-2xl);
    padding: var(--space-2xl);
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.pricing-card-modern.featured {
    border-color: var(--primary-500);
    box-shadow: var(--shadow-colored-lg);
    transform: scale(1.05);
}

.pricing-card-modern.featured::before {
    content: 'Most Popular';
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--primary-gradient);
    color: var(--text-white);
    padding: 0.5rem 2.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    transform: rotate(45deg);
    box-shadow: var(--shadow-md);
}

.pricing-card-modern:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-2xl);
}

.pricing-card-modern.featured:hover {
    transform: translateY(-8px) scale(1.07);
}

/* Modern Badge */
.badge-modern {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--primary-50);
    color: var(--primary-700);
    border: 1px solid var(--primary-100);
}

.badge-modern-success {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
    border-color: rgba(16, 185, 129, 0.2);
}

.badge-modern-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
    border-color: rgba(245, 158, 11, 0.2);
}

/* Smooth Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* Modern Divider */
.divider-modern {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
    margin: var(--space-2xl) 0;
}

/* Glass Effect */
.glass-effect {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

/* Responsive Design - Mobile First */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }
    
    .section-header h2 {
        font-size: 2.25rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section-header p {
        font-size: 1.125rem;
    }
    
    .feature-grid-modern {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .pricing-card-modern.featured {
        transform: scale(1);
    }
    
    .modern-card,
    .modern-card-elevated,
    .modern-card-glass {
        padding: var(--space-lg);
    }
    
    .btn-modern {
        padding: 0.75rem 1.5rem;
        font-size: 0.9375rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .section-header p {
        font-size: 1rem;
    }
    
    .modern-card,
    .modern-card-elevated,
    .modern-card-glass {
        padding: var(--space-md);
    }
    
    .btn-modern {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
        width: 100%;
    }
}