:root {
    /* Golden & Black Color Scheme */
    --color-gold-primary: #D4AF37;
    --color-gold-light: #F4E5C2;
    --color-gold-dark: #9B7E2A;
    --color-gold-glow: rgba(212, 175, 55, 0.4);
    
    --color-black-primary: #000000;
    --color-black-lighter: #1a1a1a;
    --color-black-light: #2d2d2d;
    
    --color-glass-bg: rgba(26, 26, 26, 0.7);
    --color-glass-border: rgba(212, 175, 55, 0.2);
    --color-glass-hover: rgba(212, 175, 55, 0.1);
    
    /* Glassmorphism Effects */
    --glass-blur: 10px;
    --glass-border-radius: 16px;
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --glass-border: 1px solid rgba(212, 175, 55, 0.18);
    
    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-mono: 'Courier New', Courier, monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background: var(--color-black-primary);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(212, 175, 55, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(212, 175, 55, 0.05) 0%, transparent 50%);
    background-attachment: fixed;
    color: var(--color-gold-light);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Glass Card */
.glass-card {
    background: var(--color-glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--glass-border-radius);
    border: var(--glass-border);
    box-shadow: var(--glass-shadow);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.glass-card:hover {
    border-color: rgba(212, 175, 55, 0.4);
    box-shadow: 0 8px 32px 0 rgba(212, 175, 55, 0.2);
    transform: translateY(-2px);
}

.glass-card-small {
    padding: var(--spacing-md);
}

.glass-card-large {
    padding: var(--spacing-xl);
}

/* Header */
.main-header {
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-glass-border);
    padding: var(--spacing-md) 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.main-header.header-hidden {
    transform: translateY(-100%);
    opacity: 0;
}

.main-header.header-visible {
    transform: translateY(0);
    opacity: 1;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-gold-primary);
    border-radius: 3px;
    transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-gold-primary);
    text-decoration: none;
    text-shadow: 0 0 20px var(--color-gold-glow);
    transition: all var(--transition-fast);
}

.logo:hover {
    text-shadow: 0 0 30px var(--color-gold-glow);
    transform: scale(1.05);
}

/* Navigation */
.main-nav ul {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.main-nav a {
    color: var(--color-gold-light);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 8px;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.main-nav a:hover {
    background: var(--color-glass-hover);
    border-color: var(--color-glass-border);
    color: var(--color-gold-primary);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.container-fluid {
    padding: var(--spacing-lg);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

@media (max-width: 1200px) {
    .grid-5 { grid-template-columns: repeat(4, 1fr); }
    .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .grid-5, .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .grid { grid-template-columns: 1fr; }
}

/* Tool Card */
.tool-card {
    background: var(--color-glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--glass-border-radius);
    border: var(--glass-border);
    padding: var(--spacing-md);
    text-decoration: none;
    color: var(--color-gold-light);
    transition: all var(--transition-normal);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.tool-card:hover {
    border-color: var(--color-gold-primary);
    background: var(--color-glass-hover);
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(212, 175, 55, 0.3);
}

.tool-icon {
    font-size: 2.5rem;
    color: var(--color-gold-primary);
    margin-bottom: var(--spacing-xs);
}

.tool-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-gold-primary);
    margin-bottom: var(--spacing-xs);
}

.tool-description {
    font-size: 0.9rem;
    color: var(--color-gold-light);
    opacity: 0.8;
    line-height: 1.4;
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gold-primary);
    font-weight: 500;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--color-glass-border);
    border-radius: 8px;
    color: var(--color-gold-light);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-gold-primary);
    box-shadow: 0 0 0 3px var(--color-gold-glow);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold-primary));
    color: var(--color-black-primary);
    border: 1px solid var(--color-gold-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-gold-primary), var(--color-gold-light));
    box-shadow: 0 4px 20px var(--color-gold-glow);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--color-glass-bg);
    color: var(--color-gold-primary);
    border: 1px solid var(--color-gold-primary);
}

.btn-secondary:hover {
    background: var(--color-gold-primary);
    color: var(--color-black-primary);
}

.btn-block {
    width: 100%;
}

/* Result Display */
.result-box {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid var(--color-gold-primary);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.result-value {
    font-size: 2rem;
    color: var(--color-gold-primary);
    font-weight: 700;
    text-align: center;
    margin: var(--spacing-sm) 0;
    text-shadow: 0 0 20px var(--color-gold-glow);
}

.result-label {
    text-align: center;
    color: var(--color-gold-light);
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Alert Messages */
.alert {
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    border: 1px solid;
}

.alert-success {
    background: rgba(40, 167, 69, 0.2);
    border-color: rgba(40, 167, 69, 0.5);
    color: #4ade80;
}

.alert-error {
    background: rgba(220, 53, 69, 0.2);
    border-color: rgba(220, 53, 69, 0.5);
    color: #f87171;
}

.alert-warning {
    background: rgba(255, 193, 7, 0.2);
    border-color: rgba(255, 193, 7, 0.5);
    color: #fbbf24;
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--color-glass-border);
    border-top: 3px solid var(--color-gold-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: var(--spacing-lg) auto;
}

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

/* Footer */
.main-footer {
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--color-glass-border);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
    text-align: center;
}

.footer-text {
    color: var(--color-gold-light);
    opacity: 0.7;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.hidden { display: none; }

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-black-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gold-dark);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gold-primary);
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }
    
    .hamburger {
        display: flex;
    }
    
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-glass-bg);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--color-glass-border);
        padding: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    }
    
    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }
    
    .main-nav a {
        display: block;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-glass-border);
    }
    
    .main-nav li:last-child a {
        border-bottom: none;
    }
    
    .logo {
        font-size: 1.4rem;
    }
    
    .container {
        padding: var(--spacing-sm);
    }
    
    .glass-card {
        padding: var(--spacing-md);
    }
    
    .glass-card-large {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.2rem;
    }
    
    .header-container {
        padding: 0 var(--spacing-sm);
    }
    
    h1 {
        font-size: 1.8rem !important;
    }
    
    h2 {
        font-size: 1.4rem !important;
    }
}