:root {
    --bg-color: #f8f9fa;
    --container-bg: #ffffff;
    --text-color: #212529;
    --number-border: #e9ecef;
    --button-bg: #007bff;
    --button-hover: #0056b3;
    --toggle-bg: #343a40;
    --toggle-text: #ffffff;
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --hr-color: #e9ecef;
}

[data-theme='dark'] {
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #f8f9fa;
    --number-border: #333333;
    --button-bg: #3700b3;
    --button-hover: #6200ee;
    --toggle-bg: #f8f9fa;
    --toggle-text: #121212;
    --input-bg: #2d2d2d;
    --input-border: #444444;
    --hr-color: #333333;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
    padding: 20px;
}

.container {
    text-align: center;
    background-color: var(--container-bg);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    transition: background-color 0.3s ease;
    width: 100%;
    max-width: 550px;
}

.theme-toggle {
    text-align: right;
    margin-bottom: 1.5rem;
}

#toggle-theme {
    background-color: var(--toggle-bg);
    color: var(--toggle-text);
    border: none;
    padding: 8px 18px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

h1 {
    margin-bottom: 2.5rem;
    font-size: 1.8rem;
    font-weight: 800;
}

.numbers {
    display: flex;
    justify-content: center;
    margin-bottom: 1.2rem;
    gap: 8px;
}

.number {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    font-size: 1.1rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* Lotto Color Palette */
.bg-yellow { background-color: #fbc400; }
.bg-blue   { background-color: #69c8f2; }
.bg-red    { background-color: #ff7272; }
.bg-gray   { background-color: #aaaaaa; }
.bg-green  { background-color: #b0d840; }

#generate {
    background-color: var(--button-bg);
    color: white;
    padding: 14px 32px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 700;
    margin-top: 1rem;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
    width: 100%;
}

#generate:hover {
    background-color: var(--button-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

#generate:active {
    transform: translateY(0);
}

.inquiry-section {
    margin-top: 2rem;
    text-align: left;
}

hr {
    border: 0;
    border-top: 1px solid var(--hr-color);
    margin-bottom: 2rem;
}

h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1rem;
}

input, textarea {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-color);
    font-size: 1rem;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

textarea {
    height: 100px;
    resize: none;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--button-bg);
}

#submit-inquiry {
    background-color: var(--toggle-bg);
    color: var(--toggle-text);
    border: none;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    width: 100%;
    transition: opacity 0.3s ease;
}

#submit-inquiry:hover {
    opacity: 0.9;
}