:root {
    --bg-color: #ffffff;
    --text-color: #202124; /* Google dark gray */
    --container-bg: #ffffff;
    --container-border: #dadce0;
    --accent-color: #1a73e8; /* Google Blue */
    --hover-bg: #f8f9fa;
    --shadow: 0 1px 2px 0 rgba(60,64,67,0.3), 0 1px 3px 1px rgba(60,64,67,0.15);
}

[data-theme="dark"] {
    --bg-color: #202124;
    --text-color: #e8eaed;
    --container-bg: #292a2d;
    --container-border: #3c4043;
    --accent-color: #8ab4f8; /* Google Light Blue */
    --hover-bg: #3c4043;
    --shadow: 0 1px 2px 0 rgba(0,0,0,0.3), 0 1px 3px 1px rgba(0,0,0,0.15);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.2s, color 0.2s;
    font-family: 'Google Sans', Roboto, Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 40px 20px;
}

.container {
    width: 100%;
    max-width: 650px;
    display: flex;
    flex-direction: column;
}

/* Theme Switch Styling */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    margin-bottom: 32px;
}

#theme-label {
    font-size: 14px;
    color: var(--text-color);
    font-weight: 500;
}

.theme-switch {
    display: inline-block;
    height: 20px;
    position: relative;
    width: 40px;
}

.theme-switch input {
    display: none;
}

.slider {
    background-color: #bdc1c6;
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: .2s;
}

.slider:before {
    background-color: #fff;
    bottom: 3px;
    content: "";
    height: 14px;
    left: 3px;
    position: absolute;
    transition: .2s;
    width: 14px;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

.slider.round {
    border-radius: 20px;
}

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

/* Lotto Container Styling */
.lotto-container {
    background-color: var(--container-bg);
    border: 1px solid var(--container-border);
    border-radius: 8px;
    padding: 32px;
    text-align: center;
    box-shadow: none;
    transition: box-shadow 0.3s ease;
}

.lotto-container:hover {
    box-shadow: var(--shadow);
}

h2 {
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 24px;
    color: var(--text-color);
}

.generate-btn {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    background-color: var(--accent-color);
    color: #fff;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s, box-shadow 0.2s;
    margin-bottom: 32px;
}

.generate-btn:hover {
    background-color: #185abc;
    box-shadow: 0 1px 3px 1px rgba(66,133,244,0.15);
}

[data-theme="dark"] .generate-btn:hover {
    background-color: #aecbfa;
    color: #202124;
}

/* Results Styling */
#lotto-results {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.lotto-row {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    padding: 12px;
    border-bottom: 1px solid var(--container-border);
}

.lotto-row:last-child {
    border-bottom: none;
}

.set-label {
    font-size: 14px;
    color: #5f6368;
    min-width: 60px;
    text-align: left;
    font-weight: 500;
}

[data-theme="dark"] .set-label {
    color: #9aa0a6;
}

.lotto-ball {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    color: #fff;
    font-size: 14px;
    transition: transform 0.2s;
}

.lotto-ball:hover {
    transform: scale(1.1);
}

/* Mobile Adjustments */
@media (max-width: 480px) {
    body {
        padding: 20px 16px;
    }
    .lotto-container {
        padding: 24px 16px;
    }
    h2 {
        font-size: 20px;
    }
    .lotto-ball {
        width: 32px;
        height: 32px;
        font-size: 13px;
    }
    .set-label {
        width: 100%;
        text-align: center;
        margin-bottom: 4px;
    }
}

/* Contact Form Styling */
.contact-container {
    background-color: var(--container-bg);
    border: 1px solid var(--container-border);
    border-radius: 8px;
    padding: 32px;
    margin-top: 32px;
    text-align: left;
    transition: box-shadow 0.3s ease;
}

.contact-container:hover {
    box-shadow: var(--shadow);
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-color);
}

.form-group input, 
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--container-border);
    border-radius: 4px;
    background-color: var(--container-bg);
    color: var(--text-color);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}

.submit-btn {
    width: 100%;
    padding: 12px;
    font-size: 14px;
    font-weight: 500;
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.submit-btn:hover {
    background-color: #185abc;
}

[data-theme="dark"] .submit-btn:hover {
    background-color: #aecbfa;
    color: #202124;
}