:root {
    --background-gradient-light: linear-gradient(to top, #a18cd1 0%, #fbc2eb 100%);
    --container-bg-light: rgba(255, 255, 255, 0.8);
    --text-color-light: #333;
    --button-gradient-light: linear-gradient(to right, #ff8177 0%, #ff867a 0%, #ff8c7f 21%, #f99185 52%, #cf556c 78%, #b12a5b 100%);
    --button-shadow-light: 0 5px 15px rgba(255, 100, 150, 0.4);
    --button-shadow-hover-light: 0 8px 25px rgba(255, 100, 150, 0.6);

    --background-gradient-dark: linear-gradient(to top, #30cfd0 0%, #330867 100%);
    --container-bg-dark: rgba(0, 0, 0, 0.7);
    --text-color-dark: #f0f2f5;
    --button-gradient-dark: linear-gradient(to right, #43e97b 0%, #38f9d7 100%);
    --button-shadow-dark: 0 5px 15px rgba(56, 249, 215, 0.4);
    --button-shadow-hover-dark: 0 8px 25px rgba(56, 249, 215, 0.6);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-image: var(--background-gradient-light);
    transition: background-image 0.5s ease;
}

body.dark-mode {
    background-image: var(--background-gradient-dark);
}

.container {
    text-align: center;
    background-color: var(--container-bg-light);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    transition: background-color 0.5s ease;
}

body.dark-mode .container {
    background-color: var(--container-bg-dark);
}

h1 {
    color: var(--text-color-light);
    margin-bottom: 30px;
    font-size: 2.5rem;
    transition: color 0.5s ease;
}

body.dark-mode h1 {
    color: var(--text-color-dark);
}

.numbers-container {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.number {
    width: 60px;
    height: 60px;
    color: white;
    font-size: 28px;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.15);
}

#generate-btn {
    background-image: var(--button-gradient-light);
    color: white;
    border: none;
    padding: 18px 36px;
    font-size: 20px;
    border-radius: 15px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-image 0.5s ease;
    box-shadow: var(--button-shadow-light);
}

body.dark-mode #generate-btn {
    background-image: var(--button-gradient-dark);
    box-shadow: var(--button-shadow-dark);
}

#generate-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--button-shadow-hover-light);
}

body.dark-mode #generate-btn:hover {
    box-shadow: var(--button-shadow-hover-dark);
}

#generate-btn:active {
    transform: translateY(-1px);
    box-shadow: var(--button-shadow-light);
}

body.dark-mode #generate-btn:active {
    box-shadow: var(--button-shadow-dark);
}

/* Theme Switch */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
    position: absolute;
    top: 20px;
    right: 20px;
}

.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: #2196F3;
}

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

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

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

/* Contact Form Styles */
.contact-form-section {
    margin-top: 40px;
    padding: 30px;
    background-color: var(--container-bg-light);
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
    transition: background-color 0.5s ease;
}

body.dark-mode .contact-form-section {
    background-color: var(--container-bg-dark);
}

.contact-form-section h2 {
    color: var(--text-color-light);
    margin-bottom: 25px;
    font-size: 2rem;
    transition: color 0.5s ease;
}

body.dark-mode .contact-form-section h2 {
    color: var(--text-color-dark);
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--text-color-light);
    transition: color 0.5s ease;
}

body.dark-mode .form-group label {
    color: var(--text-color-dark);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: calc(100% - 20px);
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 1rem;
    background-color: #fff;
    color: #333;
    transition: background-color 0.5s ease, border-color 0.5s ease, color 0.5s ease;
}

body.dark-mode .form-group input[type="text"],
body.dark-mode .form-group input[type="email"],
body.dark-mode .form-group textarea {
    background-color: #555;
    border-color: #777;
    color: #f0f2f5;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    border-color: #ff8177;
    outline: none;
    box-shadow: 0 0 8px rgba(255, 100, 150, 0.3);
}

body.dark-mode .form-group input[type="text"]:focus,
body.dark-mode .form-group input[type="email"]:focus,
body.dark-mode .form-group textarea:focus {
    border-color: #38f9d7;
    box-shadow: 0 0 8px rgba(56, 249, 215, 0.3);
}

.contact-form-section button[type="submit"] {
    background-image: var(--button-gradient-light);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-image 0.5s ease;
    box-shadow: var(--button-shadow-light);
    margin-top: 15px;
}

body.dark-mode .contact-form-section button[type="submit"] {
    background-image: var(--button-gradient-dark);
    box-shadow: var(--button-shadow-dark);
}

.contact-form-section button[type="submit"]:hover {
    transform: translateY(-3px);
    box-shadow: var(--button-shadow-hover-light);
}

body.dark-mode .contact-form-section button[type="submit"]:hover {
    box-shadow: var(--button-shadow-hover-dark);
}

.contact-form-section button[type="submit"]:active {
    transform: translateY(-1px);
    box-shadow: var(--button-shadow-light);
}

body.dark-mode .contact-form-section button[type="submit"]:active {
    box-shadow: var(--button-shadow-dark);
}