:root {
    --background-color: #f0f2f5;
    --text-color: #333;
    --main-background: white;
    --main-box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --main-border: 1px solid rgba(255, 255, 255, 0.18);
    --number-circle-bg: rgb(240, 240, 240);
    --number-circle-color: #333;
}

body.dark-mode {
    --background-color: #282c34;
    --text-color: #f0f2f5;
    --main-background: #3c4049;
    --main-box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --main-border: 1px solid rgba(255, 255, 255, 0.05);
    --number-circle-bg: #4f545c;
    --number-circle-color: #f0f2f5;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--background-color);
    margin: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239C92AC' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    transition: background-color 0.3s ease;
}

.theme-switch-wrapper {
    position: absolute;
    top: 20px;
    right: 30px;
    z-index: 1000;
}

.theme-switch {
    display: inline-block;
    height: 34px;
    position: relative;
    width: 60px;
}

.theme-switch input {
    display: none;
}

.slider {
    background-color: #ccc;
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: .4s;
}

.slider:before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: 26px;
    left: 4px;
    position: absolute;
    transition: .4s;
    width: 26px;
}

input:checked + .slider {
    background-color: #6a11cb;
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}


main {
    text-align: center;
    background: var(--main-background);
    padding: 2rem 3rem;
    border-radius: 16px;
    box-shadow: var(--main-box-shadow);
    backdrop-filter: blur(10px);
    border: var(--main-border);
    transition: background 0.3s ease, box-shadow 0.3s ease, border 0.3s ease;
}

h1 {
    color: var(--text-color);
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    transition: color 0.3s ease;
}

#feedback-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
}

#feedback-form label {
    color: var(--text-color);
}

#feedback-form input,
#feedback-form textarea {
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ccc;
    font-size: 1rem;
}

#feedback-form button {
    padding: 12px 24px;
    font-size: 1rem;
    color: white;
    background: linear-gradient(45deg, #6a11cb, #2575fc);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}