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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #000000;
    color: #ffffff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    padding: 2rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo {
    font-size: 2rem;
    font-weight: 300;
    color: #ffffff;
    letter-spacing: 0.5rem;
    text-transform: lowercase;
}

.logo img {
    height: 50px;
    width: auto;
    display: block;
}

nav ul {
    display: flex;
    gap: 3rem;
    list-style: none;
}

nav a {
    text-decoration: none;
    color: #ffffff;
    font-weight: 300;
    font-size: 0.95rem;
    letter-spacing: 0.1rem;
    text-transform: uppercase;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.7;
}

/* Main content area */
main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem;
}

.container {
    max-width: 550px;
    width: 100%;
    border: 1px solid rgba(255,255,255,0.15);
    padding: 4rem 3.5rem;
    background: rgba(255,255,255,0.02);
}

h1 {
    font-size: 3rem;
    font-weight: 200;
    letter-spacing: 0.4rem;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    text-align: center;
}

.container > p {
    color: rgba(255,255,255,0.5);
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    font-size: 1rem;
}

.form-group {
    margin-bottom: 2rem;
}

label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.6);
}

input[type="email"] {
    width: 100%;
    padding: 1.2rem 1rem;
    background: #000000;
    border: 1px solid rgba(255,255,255,0.2);
    color: #ffffff;
    font-size: 1rem;
    font-weight: 300;
    transition: border-color 0.3s;
}

input[type="email"]:focus {
    outline: none;
    border-color: rgba(255,255,255,0.5);
}

input[type="email"]::placeholder {
    color: rgba(255,255,255,0.25);
}

button {
    width: 100%;
    padding: 1.3rem;
    background: #ffffff;
    color: #000000;
    border: none;
    font-weight: 500;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 0.5rem;
}

button:hover {
    background: rgba(255,255,255,0.85);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.message {
    margin-top: 2rem;
    padding: 1.2rem;
    text-align: center;
    font-weight: 300;
    letter-spacing: 0.05em;
    border: 1px solid;
    display: none;
}

.message.success {
    border-color: rgba(255,255,255,0.3);
    color: rgba(255,255,255,0.8);
    display: block;
}

.message.error {
    border-color: rgba(255,255,255,0.3);
    color: rgba(255,255,255,0.6);
    display: block;
}

/* Footer */
footer {
    background: #000000;
    color: white;
    padding: 3.5rem 5%;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
}

footer p {
    opacity: 0.4;
    font-weight: 300;
    letter-spacing: 0.1em;
    margin: 0.5rem 0;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    header {
        padding: 1.5rem 5%;
    }

    .logo img {
        height: 40px;
    }

    nav ul {
        gap: 1.5rem;
    }

    nav a {
        font-size: 0.75rem;
    }

    main {
        padding: 3rem 1.5rem;
    }

    .container {
        padding: 3rem 2rem;
    }

    h1 {
        font-size: 2rem;
        letter-spacing: 0.3rem;
    }

    .container > p {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    nav ul {
        gap: 1rem;
    }

    nav a {
        font-size: 0.7rem;
        letter-spacing: 0.05rem;
    }
}