:root {
    --bg-color: #f7f9fc;
    --text-color: #333;
    --heading-color: #2c3e50;
    --container-bg: #ffffff;
    --input-border: #ccc;
    --shadow: rgba(0, 0, 0, 0.05);
    --ladder-base: #e2e8f0;
    --ladder-step: #cbd5e1;
    --btn-text: white;
    --help-text: #888;
}

[data-theme="dark"] {
    --bg-color: #1a202c;
    --text-color: #e2e8f0;
    --heading-color: #f7fafc;
    --container-bg: #2d3748;
    --input-border: #4a5568;
    --shadow: rgba(0, 0, 0, 0.3);
    --ladder-base: #4a5568;
    --ladder-step: #718096;
    --help-text: #a0aec0;
}

body {
    font-family: 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    padding: 20px;
    text-align: center;
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

h2 { margin-top: 0; color: var(--heading-color); }

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-toggle button {
    background: var(--container-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    padding: 8px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: bold;
    box-shadow: 0 2px 4px var(--shadow);
}

.input-group { margin-bottom: 15px; text-align: left; max-width: 500px; margin-left: auto; margin-right: auto; }
label { display: block; margin-bottom: 5px; font-weight: bold; font-size: 14px; }
input[type="text"] {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    box-sizing: border-box;
    background-color: var(--container-bg);
    color: var(--text-color);
}

.button-group {
    display: flex;
    gap: 10px;
    max-width: 500px;
    margin: 0 auto 15px auto;
}

button {
    flex: 1;
    color: var(--btn-text);
    border: none;
    padding: 14px 10px;
    font-size: 14px;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    word-break: keep-all;
}

.btn-generate { background-color: #007aff; }
.btn-generate:hover { background-color: #006ce4; }
.btn-result { background-color: #e67e22; }
.btn-result:hover { background-color: #d35400; }

#canvas-container {
    overflow-x: auto;
    margin: 10px auto;
    background: var(--container-bg);
    border-radius: 8px;
    box-shadow: 0 4px 6px var(--shadow);
    padding: 20px 0;
    max-width: 800px;
}

canvas { display: block; margin: 0 auto; }
.help-text { font-size: 15px; color: var(--help-text); margin-bottom: 10px; }

#result-box {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-color);
    margin-top: 20px;
    background: var(--container-bg);
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    display: none;
}

/* Inquiry Form Styling */
.inquiry-section {
    max-width: 500px;
    margin: 40px auto 40px auto;
    text-align: left;
    padding: 0 10px;
}

.divider {
    border: 0;
    height: 1px;
    background: var(--input-border);
    margin-bottom: 30px;
    opacity: 0.5;
}

.inquiry-section h3 {
    text-align: center;
    color: var(--heading-color);
}

.inquiry-desc {
    font-size: 14px;
    color: var(--help-text);
    margin-bottom: 25px;
    text-align: center;
}

textarea {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    box-sizing: border-box;
    background-color: var(--container-bg);
    color: var(--text-color);
    font-family: inherit;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s;
}

textarea:focus {
    border-color: #007aff;
}

.btn-submit {
    background-color: #2ecc71;
    margin-top: 10px;
}

.btn-submit:hover {
    background-color: #27ae60;
}