* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

body {
    height: 100vh;
    background:
        radial-gradient(circle at top, rgba(155, 92, 255, 0.15), transparent 60%),
        radial-gradient(circle at bottom right, rgba(255, 80, 0, 0.15), transparent 60%),
        #0b0b0f;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
}

.container {
    width: 420px;
    background: rgba(15, 15, 20, 0.9);
    padding: 45px;
    border-radius: 20px;
    box-shadow:
        0 0 40px rgba(155, 92, 255, 0.3),
        0 0 60px rgba(255, 80, 0, 0.2);
    text-align: center;
}

h2 {
    font-size: 32px;
    margin-bottom: 25px;
    background: linear-gradient(90deg, #ff003c, #9b5cff, #ff7a00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

input {
    width: 100%;
    padding: 14px;
    margin-bottom: 15px;
    border-radius: 12px;
    border: none;
    outline: none;
    background: #111;
    color: white;
    font-size: 15px;
}

input::placeholder {
    color: #888;
}

.btn {
    width: 100%;
    padding: 14px;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
}

.btn-primary {
    background: linear-gradient(135deg, #ff003c, #ff7a00);
    color: white;
    box-shadow:
        0 0 15px rgba(255, 0, 60, 0.8),
        0 0 35px rgba(255, 122, 0, 0.5);
}

.btn-primary:hover {
    transform: scale(1.05);
}

.error {
    background: rgba(255, 0, 60, 0.15);
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 15px;
    color: #ff6b6b;
}

.back {
    display: block;
    margin-top: 20px;
    color: #aaa;
    text-decoration: none;
}

.back:hover {
    color: white;
}