@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

body {
    font-family: 'Inter', sans-serif;
    background-color: #111111;
    color: #e0e0e0;
    line-height: 1.75;
    font-size: 1.05rem;
}

header {
    background-color: #1a1a1a;
    padding: 3rem 1rem;
    text-align: center;
    border-bottom: 1px solid #2a2a2a;
}

header h1 {
    font-size: 2.6rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.8px;
}

header p {
    color: #bbbbbb;
    font-size: 1.15rem;
    margin-top: 0.6rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

nav {
    background-color: #1a1a1a;
    padding: 1.2rem;
    text-align: center;
    border-bottom: 1px solid #222;
}

nav a {
    color: #cccccc;
    text-decoration: none;
    margin: 0 1.4rem;
    font-weight: 500;
    font-size: 1rem;
    position: relative;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #ff6600;
}

nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -8px;
    left: 0;
    background-color: #ff6600;
    transition: width 0.3s ease;
}

nav a:hover::after {
    width: 100%;
}

.container {
    max-width: 1000px;
    margin: 4rem auto;
    padding: 3rem;
    background-color: #1a1a1a;
    border-radius: 16px;
    border: 1px solid #2a2a2a;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

h2 {
    font-size: 2.1rem;
    color: #ffffff;
    margin-bottom: 1.6rem;
    font-weight: 600;
}

h3 {
    font-size: 1.45rem;
    color: #ff6600;
    margin: 2.2rem 0 1rem;
    font-weight: 500;
}

p, ul li {
    color: #cccccc;
    margin-bottom: 1.2rem;
    font-weight: 300;
}

ul {
    padding-left: 1.6rem;
    margin: 1.6rem 0;
}

ul li::marker {
    color: #ff6600;
}

.btn {
    display: inline-block;
    background-color: #ff6600;
    color: white;
    padding: 1rem 2.2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    margin-top: 1.8rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 102, 0, 0.25);
}

.btn:hover {
    background-color: #e65c00;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 102, 0, 0.35);
}

.specs {
    background-color: #222222;
    padding: 1.5rem;
    border-radius: 10px;
    margin: 1.5rem 0;
    border-left: 4px solid #ff6600;
}

form {
    max-width: 650px;
    margin: 2.5rem auto;
}

label {
    display: block;
    margin: 1.4rem 0 0.6rem;
    font-weight: 500;
    color: #dddddd;
}

input, textarea, select {
    width: 100%;
    padding: 1rem;
    background-color: #222222;
    border: 1px solid #444;
    border-radius: 8px;
    color: #e0e0e0;
    font-family: inherit;
    font-size: 1rem;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: #ff6600;
    box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.15);
}

footer {
    text-align: center;
    padding: 3rem 1rem;
    background-color: #1a1a1a;
    color: #777777;
    font-size: 0.92rem;
    border-top: 1px solid #222;
    margin-top: 5rem;
}

@media (max-width: 768px) {
    nav a { display: block; margin: 0.9rem 0; }
    .container { margin: 2rem 1rem; padding: 2rem; }
    header h1 { font-size: 2.2rem; }
}