/* CSS Custom Properties - 2025 Color Trends */
:root {
    /* Primary Cybersecurity Color Palette */
    --cyber-red: #ff003c;
    --cyber-red-dark: #cc002f;
    --cyber-red-light: #ff335f;
    --cyber-red-glow: rgba(255, 0, 60, 0.3);
    
    /* Glassmorphism Colors */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: rgba(0, 0, 0, 0.25);
    
    /* Dark Theme Enhancements */
    --dark-bg-primary: #0a0a0a;
    --dark-bg-secondary: #151515;
    --dark-bg-tertiary: #1a1a1a;
    --dark-surface: rgba(255, 255, 255, 0.05);
    
    /* Light Theme */
    --light-bg-primary: #ffffff;
    --light-bg-secondary: #f8f9fa;
    --light-surface: rgba(0, 0, 0, 0.03);
    
    /* Text Colors with Better Contrast */
    --text-primary-light: #0d1117;
    --text-secondary-light: #656d76;
    --text-primary-dark: #f0f6fc;
    --text-secondary-dark: #8b949e;
    
    /* Gradient Enhancements */
    --gradient-primary: linear-gradient(135deg, var(--cyber-red) 0%, #bf1922 50%, #8b0015 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    
    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius Scale */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Animation Timings */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px var(--cyber-red-glow);
}

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

*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--light-bg-primary);
    color: var(--text-primary-light);
    line-height: 1.6;
    transition: all var(--transition-normal);
    overflow-x: hidden;
    position: relative;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 0, 60, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 123, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 0, 60, 0.05) 0%, transparent 50%);
    z-index: -1;
    animation: backgroundFloat 20s ease-in-out infinite;
}

@keyframes backgroundFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(1deg); }
    66% { transform: translate(-20px, 20px) rotate(-1deg); }
}

/* Dark Mode */
body.dark-mode {
    background: var(--dark-bg-primary);
    color: var(--text-primary-dark);
}

body.dark-mode::before {
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 0, 60, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 123, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 0, 60, 0.08) 0%, transparent 50%);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    width: 80%;
    flex: 1;
}

/* Base Container */
.base-container {
    display: flex;
    gap: var(--space-xl);
    margin-top: var(--space-lg);
}

/* Metrics Container */
.metrics-container {
    flex: 2;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-xl);
}

body.dark-mode .metrics-container {
    background: rgba(21, 21, 21, 0.8);
    border-color: rgba(255, 255, 255, 0.1);
}

/* Score Container */
.score-container {
    flex: 1;
    background: var(--light-surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
}

body.dark-mode .score-container {
    background: var(--dark-surface);
}

/* Navigation - Always Dark */
nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-md) 0;
    transition: all var(--transition-normal);
}

/* Navigation hover effect */
nav:hover {
    backdrop-filter: blur(25px) saturate(200%);
    -webkit-backdrop-filter: blur(25px) saturate(200%);
    box-shadow: var(--shadow-lg);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: all var(--transition-normal);
}

.logo:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 0 10px var(--cyber-red-glow));
}

.logo i {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-links a {
    color: var(--text-primary-dark);
    text-decoration: none;
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    position: relative;
}

.nav-links a:hover {
    color: var(--cyber-red);
    transform: translateY(-2px);
    text-shadow: 0 0 10px var(--cyber-red-glow);
}

/* Secondary Navigation Bar */
.secondary-nav {
    background: var(--dark-bg-secondary);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--glass-border);
}

.secondary-nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.cvss-toggle {
    display: flex;
    gap: var(--space-sm);
}

.toggle-btn {
    background: transparent;
    color: var(--text-primary-dark);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-sm) var(--space-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.toggle-btn:hover {
    background: var(--cyber-red);
    color: white;
}

.toggle-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--cyber-red-dark);
}

/* Theme Toggle Enhanced */
.theme-btn {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary-dark);
    border-radius: var(--radius-lg);
    padding: var(--space-sm) var(--space-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.theme-btn:hover {
    background: var(--cyber-red);
    color: white;
}

/* Enhanced Typography */
h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: inherit;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--glass-border);
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 50px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
}

/* Metrics Grid Layout */
.metrics-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.metric-row {
    display: grid;
    gap: var(--space-md);
}

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

.metric-row-2 {
    grid-template-columns: 1fr 1fr;
}

/* Metric Styling */
.metric {
    background: var(--light-surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    transition: all var(--transition-normal);
}

body.dark-mode .metric {
    background: var(--dark-surface);
}

.metric:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.metric h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cyber-red);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.metric h3::before {
    content: '';
    width: 4px;
    height: 16px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* Enhanced Options */
.options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.option {
    background: var(--light-bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-xs) var(--space-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    font-weight: 500;
    font-size: 0.9rem;
}

body.dark-mode .option {
    background: var(--dark-bg-secondary);
}

.option:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-md);
    border-color: var(--cyber-red);
}

.option.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--cyber-red-dark);
    box-shadow: var(--shadow-glow);
    transform: scale(1.05);
}

/* Score Display Enhancement */
.score-display {
    text-align: center;
    margin: var(--space-lg) 0;
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    background: var(--gradient-glass);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
}

.score-value {
    font-size: 2.5rem;
    font-weight: 500;
    font-family: 'JetBrains Mono', monospace;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: var(--space-sm) 0;
    animation: scoreGlow 2s ease-in-out infinite;
}

@keyframes scoreGlow {
    0%, 100% { filter: drop-shadow(0 0 5px var(--cyber-red-glow)); }
    50% { filter: drop-shadow(0 0 15px var(--cyber-red-glow)); }
}

.score-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: inherit;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Vector Display */
.vector-display {
    background: var(--light-bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-primary-light);
    word-break: break-all;
    position: relative;
    overflow: hidden;
    margin-bottom: var(--space-md);
}

body.dark-mode .vector-display {
    background: var(--dark-bg-secondary);
    color: var(--text-primary-dark);
}

.vector-display::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
}

/* Enhanced Action Buttons */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.action-btn {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    color: inherit;
    font-size: 0.9rem;
}

.action-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    color: white;
}

.action-btn.copy {
    background: linear-gradient(135deg, #4a6491 0%, #2c3e50 100%);
    color: white;
}

.action-btn.reset {
    background: linear-gradient(135deg, #6c757d 0%, #495057 100%);
    color: white;
}

.action-btn.example {
    background: linear-gradient(135deg, #ffd166 0%, #ff8f4a 100%);
    color: var(--text-primary-light);
}

/* Form Enhancements */
.validation-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-group label {
    font-weight: 600;
    color: inherit;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    font-size: 0.9rem;
    transition: all var(--transition-normal);
    color: inherit;
}

body.dark-mode .form-group input {
    background: rgba(21, 21, 21, 0.6);
}

.form-group input:focus {
    outline: none;
    border-color: var(--cyber-red);
    box-shadow: 0 0 0 3px var(--cyber-red-glow);
    transform: translateY(-2px);
}

.validate-btn {
    background: linear-gradient(135deg, #d60606 0%, #a60505 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.validate-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl), 0 0 20px rgba(6, 214, 160, 0.3);
}

/* Severity Colors with Glow Effects */
.severity-none { 
    color: #8e8e93; 
    text-shadow: 0 0 5px rgba(142, 142, 147, 0.3);
}

.severity-low { 
    color: #f6ff00; 
    text-shadow: 0 0 5px rgba(95, 190, 190, 0.3);
}

.severity-medium { 
    color: #ff9d00; 
    text-shadow: 0 0 5px rgba(249, 168, 37, 0.3);
}

.severity-high { 
    color: var(--cyber-red); 
    text-shadow: 0 0 5px var(--cyber-red-glow);
}

.severity-critical { 
    color: #780000; 
    text-shadow: 0 0 5px rgba(211, 47, 47, 0.3);
    animation: criticalPulse 1.5s ease-in-out infinite;
}

@keyframes criticalPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Footer */
footer {
    text-align: center;
    padding: var(--space-md);
    background: var(--light-bg-secondary);
    border-top: 1px solid var(--glass-border);
    margin-top: auto;
}

body.dark-mode footer {
    background: var(--dark-bg-secondary);
}

/* Responsive Design */
@media (max-width: 900px) {
    .base-container {
        flex-direction: column;
    }
    
    .nav-container {
        flex-wrap: wrap;
        gap: var(--space-md);
    }
    
    .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        margin-top: var(--space-md);
    }
}

@media (max-width: 600px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .options {
        flex-direction: column;
    }
    
    .toggle-btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.9rem;
    }
    
    .score-value {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.25rem;
    }
    
    .metric-row-2 {
        grid-template-columns: 1fr;
    }
}

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

/* Focus indicators for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--cyber-red);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Enhanced scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--cyber-red-dark);
}

/* CVSS Content Toggle */
.cvss-content {
    display: none;
}

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

/* Validation Container */
.validation-container {
    background: var(--light-surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    width: 100%;
}

body.dark-mode .validation-container {
    background: var(--dark-surface);
}

.validation-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-group label {
    font-weight: 600;
    color: inherit;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    font-size: 1rem;
    transition: all var(--transition-normal);
    color: inherit;
}

body.dark-mode .form-group input {
    background: rgba(21, 21, 21, 0.6);
}

.form-group input:focus {
    outline: none;
    border-color: var(--cyber-red);
    box-shadow: 0 0 0 3px var(--cyber-red-glow);
    transform: translateY(-2px);
}

.validate-btn {
    background: linear-gradient(135deg, #d60606 0%, #a60505 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--space-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.validate-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl), 0 0 20px rgba(6, 214, 160, 0.3);
}