/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Inter', sans-serif;
    background-color: #0d0d0d;
    color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: #0d0d0d;
    position: sticky;
    top: 0;
    z-index: 100;
}
.logo {
    font-size: 1.5rem;
    font-weight: 800;
}
.logo span {
    color: #4f46e5;
}
nav {
    display: flex;
    align-items: center;
}
nav a {
    color: #fff;
    margin-left: 1.5rem;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}
nav a:hover {
    color: #4f46e5;
}
nav .cta {
    background: #4f46e5;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
}

/* Hero Section */
.hero {
    min-height: 85vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: linear-gradient(135deg, #1a1a1a, #000);
    padding: 0 5%;
}
.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}
.hero-content p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 2rem;
    color: #ccc;
}
.hero-btn {
    padding: 0.9rem 1.8rem;
    background: #4f46e5;
    color: #fff;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: background 0.2s ease;
}
.hero-btn:hover {
    background: #4338ca;
}

/* Converter Section */
.converter {
    padding: 6rem 5%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #0d0d0d;
}
.converter-box {
    background: #1a1a1a;
    padding: 3rem 2.5rem;
    border-radius: 1.2rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
    max-width: 550px;
    width: 100%;
    text-align: center;
    border: 1px solid rgba(79, 70, 229, 0.25);
}
.converter-box h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}
.converter-box p {
    color: #aaa;
    margin-bottom: 2rem;
}
.conversion-type {
    text-align: left;
    margin-bottom: 1.5rem;
}
.conversion-type label {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: #ddd;
}
.conversion-type select {
    width: 100%;
    padding: 0.7rem;
    border-radius: 0.5rem;
    background: #0d0d0d;
    color: #fff;
    border: 1px solid #4f46e5;
    font-size: 1rem;
    cursor: pointer;
}
.upload-area {
    border: 2px dashed #4f46e5;
    border-radius: 0.7rem;
    padding: 2.2rem;
    background: #111;
    margin-bottom: 1.8rem;
    transition: background 0.2s ease, border-color 0.2s ease;
}
.upload-area:hover {
    background: #151515;
    border-color: #6c63ff;
}
.upload-area p {
    margin: 0;
    color: #aaa;
}
.upload-area span {
    color: #4f46e5;
    cursor: pointer;
    text-decoration: underline;
}
.convert-btn {
    width: 100%;
    padding: 0.95rem;
    background: #4f46e5;
    color: #fff;
    border: none;
    border-radius: 0.6rem;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.15s ease;
}
.convert-btn:hover {
    background: #4338ca;
    transform: scale(1.02);
}

/* Features */
.features {
    padding: 5rem 5%;
    text-align: center;
}
.features h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}
.feature-card {
    background: #1a1a1a;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
}
.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

/* How It Works */
.how-it-works {
    padding: 5rem 5%;
    text-align: center;
    background: #111;
}
.steps {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 600px;
    margin: 2rem auto 0;
}
.step {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.step .number {
    background: #4f46e5;
    color: #fff;
    width: 35px;
    height: 35px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    font-weight: 700;
}

/* Coming Soon */
.coming-soon {
    padding: 5rem 5%;
    text-align: center;
}
.coming-soon h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    background: #0d0d0d;
    color: #777;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }
    nav {
        margin-top: 1rem;
        flex-direction: column;
        width: 100%;
    }
    nav a {
        margin: 0.5rem 0;
    }
    .hero-content h1 {
        font-size: 2rem;
    }
    .hero-content p {
        font-size: 1rem;
    }
    .converter-box {
        padding: 2rem;
    }
}