:root {
    --bg-color: #f0f0f0;
    --text-color: #333;
    --container-bg: #fff;
    --number-border: #ccc;
    --btn-bg: #333;
    --btn-color: #fff;
    --row-divider: #e0e0e0;
    --input-bg: #f9f9f9;
    --input-border: #ddd;
}

[data-theme="dark"] {
    --bg-color: #1a1a2e;
    --text-color: #e0e0e0;
    --container-bg: #16213e;
    --number-border: #533483;
    --btn-bg: #e94560;
    --btn-color: #fff;
    --row-divider: #2a2a4a;
    --input-bg: #0f3460;
    --input-border: #533483;
}

body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

.page-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    padding: 60px 20px;
    width: 100%;
    max-width: 500px;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--number-border);
    background-color: var(--container-bg);
    font-size: 1.3em;
    cursor: pointer;
    transition: background-color 0.3s, border-color 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

.theme-toggle:hover {
    opacity: 0.8;
}

.container {
    text-align: center;
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transition: background-color 0.3s;
    width: 100%;
    box-sizing: border-box;
}

.lotto-rows {
    margin: 20px 0;
}

.lotto-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
}

.lotto-row + .lotto-row {
    border-top: 1px solid var(--row-divider);
}

.row-label {
    font-size: 0.85em;
    font-weight: bold;
    color: var(--text-color);
    opacity: 0.6;
    min-width: 20px;
}

.number {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.1em;
    font-weight: bold;
    color: #fff;
    transition: transform 0.2s;
}

.number:hover {
    transform: scale(1.15);
}

.number.range-1  { background-color: #fbc400; }
.number.range-10 { background-color: #69c8f2; }
.number.range-20 { background-color: #ff7272; }
.number.range-30 { background-color: #aaa; }
.number.range-40 { background-color: #b0d840; }

#generate-btn {
    padding: 12px 28px;
    font-size: 1em;
    cursor: pointer;
    background-color: var(--btn-bg);
    color: var(--btn-color);
    border: none;
    border-radius: 8px;
    transition: background-color 0.3s;
}

#generate-btn:hover {
    opacity: 0.9;
}

/* Contact Form */
.contact-form h2 {
    margin: 0 0 4px;
    font-size: 1.4em;
}

.form-desc {
    margin: 0 0 20px;
    font-size: 0.9em;
    opacity: 0.7;
}

.form-group {
    text-align: left;
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.9em;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-size: 0.95em;
    font-family: inherit;
    box-sizing: border-box;
    transition: border-color 0.3s, background-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--btn-bg);
}

.form-group textarea {
    resize: vertical;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    background-color: var(--btn-bg);
    color: var(--btn-color);
    border: none;
    border-radius: 8px;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    opacity: 0.9;
}

.form-status {
    margin-top: 12px;
    font-size: 0.9em;
    min-height: 1.2em;
}

.form-status.success {
    color: #4caf50;
}

.form-status.error {
    color: #e94560;
}