:root {
    --primary-color: #f5f5f7;
    --background-color: rgba(0, 0, 0, 0.15);
    --container-background-color: rgba(0, 0, 0, 0.15);
    --border-color: rgba(255, 255, 255, 0.1);
    --hover-background-color: rgba(255, 255, 255, 0.2);
    --placeholder-color: #a1a1a6;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --svg-filter: invert(95%) sepia(9%) saturate(158%) hue-rotate(248deg) brightness(114%) contrast(100%);
}

html {
    background-image: url("./images/bg.jpg");
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    background-attachment: fixed;
    background-color: #1d1d1d;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    font-family: var(--font-family);
    color: var(--primary-color);
    box-sizing: border-box;
}

.container {
    width: 100%;
    max-width: 800px;
    padding: 30px;
    background: var(--container-background-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.head-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    object-fit: cover;
    margin-bottom: 20px;
}

h2 {
    text-align: center;
    margin-bottom: 10px;
}

h4 {
    text-align: center;
    font-weight: normal;
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 30px;
    max-width: 600px;
}

form {
    width: 100%;
    max-width: 600px;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
}

label {
    margin-bottom: 8px;
    font-weight: bold;
    text-align: center;
}

input, textarea {
    padding: 15px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background-color: var(--background-color);
    color: var(--primary-color);
    font-size: 16px;
    font-family: var(--font-family);
    transition: background-color 0.3s, border-color 0.3s;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--hover-background-color);
    background-color: var(--container-background-color);
}

textarea {
    height: 120px;
    resize: vertical;
}

input::placeholder, textarea::placeholder {
    color: var(--placeholder-color);
}

button {
    width: 100%;
    padding: 15px 20px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background-color: var(--background-color);
    color: var(--primary-color);
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: var(--hover-background-color);
}