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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #0a0a0a;
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    padding: 2rem 0;
    border-bottom: 2px solid #00ffff;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.brand {
    text-align: center;
    margin-bottom: 2rem;
}

.brand-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #00ffff;
    text-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
    margin-bottom: 0.5rem;
}

.brand-subtitle {
    font-size: 1.2rem;
    color: #cccccc;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1rem;
    color: #888888;
    font-style: italic;
}

.main-nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.main-nav a {
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.main-nav a:hover {
    color: #00ffff;
    border-color: #00ffff;
    background: rgba(0, 255, 255, 0.1);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
    padding: 4rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 70%, rgba(0, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #00ffff, #0099cc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.3rem;
    color: #cccccc;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(0, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    min-width: 150px;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #00ffff;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.stat-label {
    font-size: 0.9rem;
    color: #cccccc;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Section Styles */
.calculator-grid {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: #ffffff;
}

.section-subtitle {
    font-size: 1.2rem;
    text-align: center;
    color: #888888;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Calculator Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.calculator-card {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid rgba(0, 255, 255, 0.2);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.calculator-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.calculator-card:hover {
    transform: translateY(-5px);
    border-color: #00ffff;
    box-shadow: 0 20px 40px rgba(0, 255, 255, 0.2);
}

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

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.calculator-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #ffffff;
}

.calculator-card p {
    color: #cccccc;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.card-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.card-features span {
    background: rgba(0, 255, 255, 0.1);
    color: #00ffff;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid rgba(0, 255, 255, 0.3);
}

.card-button {
    display: inline-block;
    background: linear-gradient(135deg, #00ffff, #0099cc);
    color: #000000;
    text-decoration: none;
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
    width: 100%;
}

.card-button:hover {
    background: linear-gradient(135deg, #0099cc, #00ffff);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 255, 255, 0.3);
}

/* Disclaimer */
.disclaimer {
    background: linear-gradient(135deg, #2d2d2d 0%, #1a1a1a 100%);
    padding: 2rem 0;
    border-top: 2px solid #ffcc00;
    text-align: center;
}

.disclaimer h3 {
    color: #ffcc00;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.disclaimer p {
    color: #cccccc;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Footer */
.footer {
    background: #0a0a0a;
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid #333333;
}

.footer p {
    color: #666666;
    font-size: 0.9rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .brand-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        gap: 1rem;
    }
    
    .stat {
        min-width: 120px;
        padding: 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .calculator-card {
        padding: 1.5rem;
    }
    
    .main-nav ul {
        gap: 1rem;
    }
    
    .main-nav a {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .brand-title {
        font-size: 1.8rem;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .calculator-card {
        padding: 1.2rem;
    }
    
    .card-icon {
        font-size: 2.5rem;
    }
    
    .calculator-card h3 {
        font-size: 1.3rem;
    }
}