:root {
    --navy: #0f1b3c;
    --dark-navy: #0a0f1f;
    --cyan: #00d4ff;
    --light-cyan: #7ffaff;
    --text-light: #e0f7ff;
    --accent: #00a8cc;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--navy);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--dark-navy) 0%, var(--navy) 100%);
    padding: 80px 20px;
    text-align: center;
    border-bottom: 2px solid var(--cyan);
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero h1 {
    font-size: clamp(2rem, 8vw, 4rem);
    color: var(--cyan);
    margin-bottom: 20px;
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

.hero p {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--light-cyan);
    margin-top: 15px;
}

/* Skills Grid */
.skills {
    padding: 80px 20px;
    background-color: var(--navy);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.skill-card {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(0, 168, 204, 0.1) 100%);
    border: 1px solid var(--cyan);
    border-radius: 12px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.skill-card:hover::before {
    left: 100%;
}

.skill-card:hover {
    border-color: var(--light-cyan);
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: inline-block;
}

.skill-card h3 {
    color: var(--cyan);
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.skill-card p {
    color: var(--light-cyan);
    font-size: 0.95rem;
}

/* Features Section */
.features {
    padding: 80px 20px;
    background: linear-gradient(135deg, var(--dark-navy) 0%, var(--navy) 100%);
    border-top: 2px solid var(--accent);
}

.features h2 {
    text-align: center;
    color: var(--cyan);
    font-size: clamp(1.8rem, 6vw, 3rem);
    margin-bottom: 60px;
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature {
    padding: 30px;
    border-left: 3px solid var(--cyan);
    transition: var(--transition);
    position: relative;
}

.feature:hover {
    border-left-color: var(--light-cyan);
    transform: translateX(10px);
}

.feature-number {
    display: inline-block;
    color: var(--cyan);
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 15px;
    opacity: 0.7;
}

.feature h4 {
    color: var(--light-cyan);
    font-size: 1.3rem;
    margin: 15px 0;
}

.feature p {
    color: rgba(224, 247, 255, 0.8);
    font-size: 0.95rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        padding: 60px 20px;
        min-height: 40vh;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .skills,
    .features {
        padding: 60px 20px;
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .features-list {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .skill-card {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 40px 15px;
        min-height: 35vh;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero p {
        font-size: 0.95rem;
    }

    .skills,
    .features {
        padding: 40px 15px;
    }

    .skills-grid,
    .features-list {
        gap: 15px;
    }

    .skill-card {
        padding: 20px 15px;
    }

    .skill-icon {
        font-size: 2.5rem;
    }

    .feature-number {
        font-size: 2rem;
    }
}