:root {
    --primary-color: #007bff;
    --border-color: #ddd;
    --background-color: #f8f9fa;
    --disabled-color: #c0c0c0;
    --text-color: #333;
    --text-light: #666;
}
html { font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--background-color);
    margin: 0;
    padding: 1rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    color: var(--text-color);
    box-sizing: border-box;
}
.container {
    background: #fff;
    padding: 1.5rem 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    text-align: center;
    width: 90%;
    max-width: 600px;
}
h1 { margin-top: 0; }
p { color: var(--text-light); margin-bottom: 1.5rem; }
ul { text-align: left; padding-left: 20px; }
li { margin-bottom: 0.5rem; }

/* --- index.html (Welcome Page) --- */
.content-box {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem 1.5rem;
    margin-bottom: 1.5rem;
}
.content-box h2 {
    font-size: 1.2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

/* --- select.html --- */
.spec-selector { border: 1px solid var(--border-color); border-radius: 8px; padding: 0.8rem 1rem; margin-bottom: 1.5rem; text-align: left; }
.spec-selector legend { font-weight: bold; padding: 0 10px; }
.spec-options { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.spec-option { flex: 1 1 100%; }
.spec-option input[type="radio"] { display: none; }
.spec-option label { display: block; padding: 0.5rem; border: 1px solid var(--border-color); border-radius: 5px; cursor: pointer; transition: all 0.2s; line-height: 1.4; }
.spec-option label b { display: block; font-size: 1rem; }
.spec-option input[type="radio"]:checked + label { background-color: #e7f1ff; border-color: var(--primary-color); box-shadow: 0 0 5px rgba(0, 123, 255, 0.5); }
.spec-option label:hover { border-color: #a0a0a0; }

/* --- editor.html --- */
.main-editor { display: flex; margin-bottom: 1.5rem; justify-content: center; }
.editor-content { display: flex; flex-direction: column; width: 100%; }
.ruler { position: relative; background: #f0f0f0; flex-shrink: 0; }
.ruler.horizontal { height: 20px; width: 100%; }
.ruler.vertical { width: 20px; }
.ruler .tick { position: absolute; background: #aaa; }
.ruler.horizontal .tick { width: 1px; height: 100%; top: 0; }
.ruler.vertical .tick { height: 1px; width: 100%; left: 0; }
.ruler .tick .label { position: absolute; font-size: 10px; color: #555; }
.ruler.horizontal .tick .label { top: 2px; left: 4px; }
.ruler.vertical .tick .label { left: 2px; top: -12px; transform: rotate(-90deg); transform-origin: left top; }
.editor-area { display: flex; justify-content: center; }
.canvas-wrapper { position: relative; border: 1px solid var(--border-color); overflow: hidden; background-color: #eee; width: 100%; }
#imageCanvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; cursor: move; }
.crop-box { position: absolute; top: 0; left: 0; width: 100%; height: 100%; box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5); pointer-events: none; border: 1px dashed #fff; box-sizing: border-box; }
#spec-info { font-weight: bold; color: var(--primary-color); }
.back-link { display: block; margin-top: 1rem; font-size: 0.9rem; color: var(--text-light); }

/* --- Common --- */
.controls { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; margin: 1.5rem 0; gap: 1rem; }
.zoom-control { display: flex; align-items: center; gap: 5px; }
.button { display: inline-block; padding: 0.8rem 1rem; background-color: var(--primary-color); color: white; border: none; border-radius: 5px; cursor: pointer; font-size: 1rem; transition: background-color 0.3s; text-decoration: none; }
.button.disabled { background-color: var(--disabled-color); cursor: not-allowed; pointer-events: none; }
.button:not(.disabled):hover { background-color: #0056b3; }
.primary-button { width: 100%; padding: 1rem; font-size: 1.1rem; box-sizing: border-box;}
.status-message { margin-top: 1rem; color: var(--primary-color); font-weight: bold; min-height: 20px; }
footer { text-align: center; width: 100%; color: #999; font-size: 0.8rem; padding-top: 2rem; }
.lang-selector-wrapper { margin-bottom: 1rem; }
.lang-selector-wrapper label { font-size: 0.9rem; margin-right: 5px; }
#lang-select { padding: 2px 5px; border-radius: 4px; border: 1px solid var(--border-color); }

/* --- RWD Media Queries --- */
@media (min-width: 576px) {
    .spec-option { flex: 1 1 45%; }
}
@media (min-width: 768px) {
    .spec-option { flex: 1 1 30%; }
    .container { max-width: 720px; }
}