body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: #f0f2f5; color: #1c1e21; margin: 0; }
.user-container { display: flex; justify-content: center; align-items: center; min-height: 100vh; padding: 20px; }
.form-box { background: #fff; padding: 25px 30px; border-radius: 8px; box-shadow: 0 2px 4px rgba(0, 0, 0, .1), 0 8px 16px rgba(0, 0, 0, .1); width: 100%; max-width: 400px; }
.form-box h2 { text-align: center; margin-bottom: 20px; font-size: 24px; color: #333; }
.form-group { margin-bottom: 15px; }
.form-group input { width: 100%; padding: 12px; border: 1px solid #dddfe2; border-radius: 6px; box-sizing: border-box; font-size: 16px; }
button { width: 100%; padding: 12px; background-color: #1877f2; color: white; border: none; border-radius: 6px; cursor: pointer; font-size: 18px; font-weight: bold; transition: background-color 0.2s; }
button:hover { background-color: #166fe5; }
.error-msg { color: #fa3e3e; text-align: center; margin-bottom: 10px; min-height: 1.2em; }
.switch-form { text-align: center; margin-top: 15px; font-size: 14px; }
.switch-form a { color: #1877f2; text-decoration: none; font-weight: 500; }
.hidden { display: none; }

.home-container { max-width: 800px; margin: 0 auto; padding: 20px; }
.home-header { background: #fff; padding: 20px; border-radius: 8px; margin-bottom: 20px; box-shadow: 0 1px 2px rgba(0,0,0,0.1); display: flex; justify-content: space-between; align-items: center; }
.home-header h1 { margin: 0; font-size: 22px; }
.home-header p { margin: 0; }
.home-header a { color: #1877f2; text-decoration: none; font-weight: bold; }
.content-wrapper { background: #fff; padding: 25px; border-radius: 8px; box-shadow: 0 1px 2px rgba(0,0,0,0.1); }
.form-card { margin-bottom: 25px; padding-bottom: 20px; border-bottom: 1px solid #eee; }
.form-card:last-child { border-bottom: none; margin-bottom: 0; }
.form-card h3 { margin-top: 0; margin-bottom: 15px; font-size: 18px; }
label { display: block; margin-bottom: 8px; font-weight: 500; }
textarea, input[type="text"] { width: 100%; padding: 10px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; }
textarea { min-height: 120px; resize: vertical; }
small { color: #666; font-size: 13px; margin-top: 5px; display: block; }
.save-btn { display: block; width: auto; padding: 12px 30px; margin: 20px auto 0; }
.share-link-card { margin-top: 30px; padding: 20px; background-color: #f0f8ff; border: 1px solid #d1e7fd; border-radius: 8px; }
.share-link-card h3 { margin-top: 0; }
#share-link-input { width: calc(100% - 100px); padding: 10px; border: 1px solid #ccc; border-radius: 4px 0 0 4px; background: #fff; }
#copy-link-btn { width: 90px; padding: 10px; border-radius: 0 4px 4px 0; border: 1px solid #1877f2; background: #1877f2; color: #fff; cursor: pointer; float: right; }
.alert { padding: 15px; margin-bottom: 20px; border-radius: 4px; text-align: center; }
.alert-success { background-color: #d1e7dd; color: #0f5132; }
.alert-error { background-color: #f8d7da; color: #842029; }