/* --- Variable Definitions on Wrapper --- */
.button-generator-container {
    /* Initial Color Definitions */
    --primary-color: #3b82f6;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --base-font-size: 16px;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);

    /* Base Styles */
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #f0f2f5;
    margin: 0;
    padding: 2rem 0;
    font-size: var(--base-font-size);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    box-sizing: border-box;
    counter-reset: step-counter;
}

.button-generator-container .main-content { flex-grow: 1; }
.button-generator-container .container { max-width: 1100px; margin-left: auto; margin-right: auto; padding: 0 2rem; }
.button-generator-container .card { background-color: white; padding: 1.5rem; border-radius: var(--border-radius); box-shadow: var(--box-shadow); margin-bottom: 2rem; }

/* Header */
.button-generator-container header { text-align: center; margin-top: 0; margin-bottom: 2rem; padding: 1.5rem; }
.button-generator-container header h1 { color: var(--primary-color); margin-top: 0; margin-bottom: 0.5rem; font-size: 1.8rem; line-height: 1.2; }
.button-generator-container header p { color: #555; font-size: 1.05rem; margin-bottom: 0; }

/* Usage Guide */
.button-generator-container .usage-guide { background-color: var(--light-color); border: 1px solid #e5e7eb; margin-bottom: 2rem; padding: 1rem 1.5rem; border-radius: var(--border-radius); }
.button-generator-container .usage-guide h3 { margin-top: 0; margin-bottom: 1rem; font-size: 1.2rem; color: var(--primary-color); text-align: center; }
.button-generator-container .usage-guide ol { list-style: none; padding-left: 0; margin: 0; display: flex; flex-wrap: wrap; justify-content: space-around; gap: 0.5rem; }
.button-generator-container .usage-guide li { font-size: 0.9rem; color: #333; display: flex; align-items: center; gap: 0.5rem; padding: 0.5rem 0; }
.button-generator-container .usage-guide li::before { content: counter(step-counter); counter-increment: step-counter; display: inline-block; background-color: var(--primary-color); color: white; width: 1.5em; height: 1.5em; line-height: 1.5em; border-radius: 50%; text-align: center; font-weight: bold; font-size: 0.9em; flex-shrink: 0; }

/* Input Section */
.button-generator-container .input-section h2 { margin-top: 0; margin-bottom: 1.5rem; font-size: 1.5rem; text-align: center; }
.button-generator-container .input-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem 2rem; align-items: start; }
.button-generator-container .input-group { margin-bottom: 0; }

/* Common Controls */
.button-generator-container input[type="text"],
.button-generator-container input[type="number"],
.button-generator-container select,
.button-generator-container .size-btn,
.button-generator-container .width-btn,
.button-generator-container .radius-btn { padding: 0.7rem 0.75rem; border: 1px solid #ddd; border-radius: 4px; font-size: 0.95rem; box-sizing: border-box; height: 42px; line-height: 1.4; vertical-align: middle; background-color: white; color: var(--dark-color); transition: border-color 0.2s ease, box-shadow 0.2s ease; }
.button-generator-container input[type="text"]:focus,
.button-generator-container input[type="number"]:focus,
.button-generator-container select:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary-color) 20%, transparent); }
.button-generator-container input[type="text"] { width: 100%; }

.button-generator-container .input-group.button-text-group { grid-column: span 2; }
.button-generator-container .size-level { display: flex; gap: 0.5rem; }
.button-generator-container .size-btn { flex-grow: 1; background-color: #f3f4f6; cursor: pointer; }
.button-generator-container .width-level { display: flex; gap: 0.5rem; }
.button-generator-container .width-btn { flex-grow: 1; background-color: #f3f4f6; cursor: pointer; }
.button-generator-container .radius-level { display: flex; gap: 0.5rem; }
.button-generator-container .radius-btn { flex-grow: 1; background-color: #f3f4f6; cursor: pointer; }
.button-generator-container .size-btn.active,
.button-generator-container .width-btn.active,
.button-generator-container .radius-btn.active { background-color: var(--primary-color); color: white; border-color: var(--primary-color); }
.button-generator-container .size-btn:not(.active):hover,
.button-generator-container .width-btn:not(.active):hover,
.button-generator-container .radius-btn:not(.active):hover { background-color: #e5e7eb; border-color: #ccc; }
.button-generator-container label { display: block; margin-bottom: 0.5rem; font-weight: bold; color: var(--dark-color); font-size: 0.95em; }

/* Color Settings */
.button-generator-container .color-settings { margin-top: 1rem; padding: 1.5rem; background-color: var(--light-color); border-radius: var(--border-radius); grid-column: span 2; }
.button-generator-container .color-settings h3 { margin-top: 0; margin-bottom: 0.8em; text-align: center; color: var(--primary-color); }
.button-generator-container .color-description { font-size: 0.9em; color: #555; margin-bottom: 1.5rem; text-align: center; }
.button-generator-container .color-picker-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1rem; margin-top: 0.5rem; }
.button-generator-container .color-item { background-color: white; border: 1px solid #e5e7eb; border-radius: 6px; padding: 0.8rem 1rem; display: flex; align-items: center; justify-content: space-between; gap: 0.8rem; box-shadow: 0 2px 4px rgba(0,0,0,0.03); transition: box-shadow 0.3s ease; }
.button-generator-container .color-item:hover { box-shadow: 0 4px 8px rgba(0,0,0,0.05); }
.button-generator-container .color-item label { margin-bottom: 0; font-weight: 500; font-size: 0.95em; color: var(--dark-color); cursor: help; flex-grow: 1; }
.button-generator-container .color-item input[type="color"] { width: 45px; height: 30px; padding: 0; border: 1px solid #ddd; border-radius: 4px; cursor: pointer; background-color: transparent; flex-shrink: 0; }
.button-generator-container .color-item input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.button-generator-container .color-item input[type="color"]::-webkit-color-swatch { border: none; border-radius: 3px; }
.button-generator-container .color-item input[type="color"]::-moz-color-swatch { border: none; border-radius: 3px; }

/* Additional Settings */
.button-generator-container .other-settings { margin-top: 1rem; grid-column: span 2; }
.button-generator-container .checkbox-group { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 0.5rem; }
.button-generator-container .checkbox-item { display: flex; align-items: center; gap: 0.5rem; }
.button-generator-container .checkbox-item label { margin-bottom: 0; font-weight: normal; cursor: pointer; }
.button-generator-container .checkbox-item input[type="checkbox"] { cursor: pointer; }

/* Preview Section */
.button-generator-container .preview-section h2 { text-align: center; margin-top: 0; font-size: 1.5rem; }
.button-generator-container .preview-section p { text-align: center; margin-bottom: 1.5rem; color: #555; font-size: 0.95em; }
.button-generator-container .design-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 1rem; }
.button-generator-container .design-card { background-color: white; border-radius: var(--border-radius); overflow: hidden; box-shadow: var(--box-shadow); transition: transform 0.3s ease, border-color 0.3s ease; display: flex; flex-direction: column; border: 2px solid transparent; }
.button-generator-container .design-card.selected { border-color: var(--primary-color); }
.button-generator-container .design-card:hover { transform: translateY(-5px); }
.button-generator-container .design-preview { padding: 1.5rem; min-height: 100px; display: flex; align-items: center; justify-content: center; background-color: var(--light-color); flex-grow: 1; overflow: hidden; }
.button-generator-container .design-preview button { font-family: inherit; }
.button-generator-container .design-footer { padding: 1rem; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid #f3f4f6; font-size: 0.9em; }
.button-generator-container .select-btn { background-color: var(--primary-color); color: white; border: none; border-radius: 4px; padding: 0.5rem 1rem; cursor: pointer; font-size: 0.9rem; transition: background-color 0.3s ease, filter 0.3s ease; }
.button-generator-container .select-btn:hover { filter: brightness(90%); }

/* Code Section */
.button-generator-container .code-section h2 { text-align: center; margin-top: 0; font-size: 1.5rem; }
.button-generator-container .code-section p { text-align: center; margin-bottom: 1.5rem; color: #555; font-size: 0.95em; }
.button-generator-container .code-display-area { margin-bottom: 1.5rem; }
.button-generator-container .code-display-area:last-child { margin-bottom: 0; }
.button-generator-container pre { background-color: var(--dark-color); color: white; padding: 1rem; border-radius: 4px; overflow-x: auto; position: relative; padding-top: 2.5rem; margin-top: 0.5rem; font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace; font-size: 0.9em; white-space: pre-wrap; word-break: break-all; }
.button-generator-container .copy-btn { position: absolute; top: 0.5rem; right: 0.5rem; background-color: var(--light-color); color: var(--dark-color); border: none; border-radius: 4px; padding: 0.25rem 0.5rem; font-size: 0.8rem; cursor: pointer; z-index: 10; transition: background-color 0.2s; }
.button-generator-container .copy-btn:hover { background-color: #e5e7eb; }
.button-generator-container .copy-btn:disabled { cursor: default; opacity: 0.7; }

/* Button Style Definitions */
.button-generator-container .btn-style1 { display: inline-block; padding: 0.75em 1.5em; font-size: 1rem; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; border: none; border-radius: 4px; background-color: var(--primary-color); color: white; transition: background-color 0.3s, transform 0.2s; }
.button-generator-container .btn-style1:hover { background-color: color-mix(in srgb, var(--primary-color) 85%, black); transform: translateY(-2px); }
.button-generator-container .btn-style1:active { transform: translateY(0); }
.button-generator-container .btn-style2 { display: inline-block; padding: 0.75em 1.5em; font-size: 1rem; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; border: 2px solid var(--primary-color); border-radius: 4px; background-color: transparent; color: var(--primary-color); transition: background-color 0.3s, color 0.3s; }
.button-generator-container .btn-style2:hover { background-color: var(--primary-color); color: white; }
.button-generator-container .btn-style3 { display: inline-block; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; border: none; background-color: var(--accent-color); color: white; box-shadow: 0 0 8px color-mix(in srgb, var(--accent-color) 80%, transparent), 0 0 15px color-mix(in srgb, var(--accent-color) 60%, transparent); transition: background-color 0.3s, box-shadow 0.3s, transform 0.2s; }
.button-generator-container .btn-style3:hover { background-color: color-mix(in srgb, var(--accent-color) 85%, black); box-shadow: 0 0 10px color-mix(in srgb, var(--accent-color) 90%, transparent), 0 0 25px color-mix(in srgb, var(--accent-color) 70%, transparent), 0 0 40px color-mix(in srgb, var(--accent-color) 40%, transparent); transform: translateY(-2px); }
.button-generator-container .btn-style3:active { transform: translateY(0); background-color: color-mix(in srgb, var(--accent-color) 80%, black); box-shadow: 0 0 8px color-mix(in srgb, var(--accent-color) 80%, transparent), 0 0 15px color-mix(in srgb, var(--accent-color) 60%, transparent); }
.button-generator-container .btn-style4 { display: inline-block; padding: 0.75em 1.5em; font-size: 1rem; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; border: none; border-radius: 4px; background: linear-gradient(to right, var(--primary-color), var(--secondary-color)); color: white; transition: box-shadow 0.3s; }
.button-generator-container .btn-style4:hover { box-shadow: 0 4px 12px color-mix(in srgb, var(--primary-color) 40%, transparent); }
.button-generator-container .btn-style5 { display: inline-block; padding: 0.75em 1.5em; font-size: 1rem; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; border: none; border-radius: 4px; background-color: var(--primary-color); color: white; box-shadow: 0 4px 0 color-mix(in srgb, var(--primary-color) 80%, black); transition: transform 0.1s, box-shadow 0.1s; }
.button-generator-container .btn-style5:hover { transform: translateY(-2px); box-shadow: 0 6px 0 color-mix(in srgb, var(--primary-color) 80%, black); }
.button-generator-container .btn-style5:active { transform: translateY(2px); box-shadow: 0 2px 0 color-mix(in srgb, var(--primary-color) 80%, black); }
.button-generator-container .btn-style6 { display: inline-block; padding: 0.75em 1.5em; font-size: 1rem; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; border: 2px solid var(--primary-color); border-radius: 4px; background-color: transparent; color: var(--primary-color); transition: color 0.3s; position: relative; z-index: 1; overflow: hidden; }
.button-generator-container .btn-style6::before { content: ""; position: absolute; left: 0; top: 0; width: 0; height: 100%; background-color: var(--primary-color); transition: width 0.3s ease; z-index: -1; }
.button-generator-container .btn-style6:hover { color: white; }
.button-generator-container .btn-style6:hover::before { width: 100%; }
.button-generator-container .btn-style7 { display: inline-block; padding: 0.75em 1.5em; font-size: 1rem; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; border: none; border-radius: 4px; background-color: white; color: var(--dark-color); transition: box-shadow 0.3s, transform 0.2s; }
.button-generator-container .btn-style7:hover { transform: translateY(-2px); }
.button-generator-container .btn-style8 { display: inline-block; padding: 0.75em 1.5em; font-size: 1rem; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; border: 2px solid var(--primary-color); border-radius: 4px; background-color: var(--primary-color); color: white; transition: background-color 0.3s, color 0.3s; }
.button-generator-container .btn-style8:hover { background-color: transparent; color: var(--primary-color); }
.button-generator-container .btn-style9 { display: inline-block; padding: 0.75em 1.5em; font-size: 1rem; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; border: none; border-radius: 4px; background-color: var(--success-color); color: white; transition: filter 0.3s; }
.button-generator-container .btn-style9:hover { filter: brightness(110%); }
.button-generator-container .btn-style10 { display: inline-block; padding: 0.75em 1.5em; font-size: 1rem; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; border: none; background-color: transparent; color: var(--primary-color); position: relative; overflow: hidden; transition: color 0.3s ease; }
.button-generator-container .btn-style10::after { content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 2px; background-color: var(--primary-color); transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease; }
.button-generator-container .btn-style10:hover { color: color-mix(in srgb, var(--primary-color) 85%, black); }
.button-generator-container .btn-style10:hover::after { transform: scaleX(1); }
.button-generator-container .btn-style11 { display: inline-block; padding: 0.75em 1.5em; font-size: 1rem; font-weight: 500; text-align: center; text-decoration: none; cursor: pointer; border: 1px solid var(--accent-color); border-radius: 4px; background-color: transparent; color: var(--accent-color); transition: background-color 0.3s ease, color 0.3s ease; }
.button-generator-container .btn-style11:hover { background-color: var(--accent-color); color: white; }
.button-generator-container .btn-style12 { display: inline-block; padding: 0.75em 1.5em; font-size: 1rem; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; border: 1px solid var(--primary-color); border-radius: 4px; background-color: var(--primary-color); color: white; position: relative; box-shadow: inset 0 0 0 2px white; transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease; }
.button-generator-container .btn-style12:hover { background-color: white; color: var(--primary-color); box-shadow: inset 0 0 0 2px var(--primary-color); }

/* Common Utility Classes */
.button-generator-container .size-small { font-size: 0.875rem; padding: 0.5em 1em; }
.button-generator-container .size-medium { font-size: 1rem; padding: 0.75em 1.5em; }
.button-generator-container .size-large { font-size: 1.125rem; padding: 1em 2em; }
.button-generator-container .width-auto { display: inline-block; width: auto; }
.button-generator-container .width-full { display: block; width: 100%; box-sizing: border-box; }
.button-generator-container .radius-none { border-radius: 0; }
.button-generator-container .radius-small { border-radius: 4px; }
.button-generator-container .radius-medium { border-radius: 8px; }
.button-generator-container .radius-large { border-radius: 50px; }
.button-generator-container .with-shadow { box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); }
.button-generator-container .icon { margin-right: 0.5em; display: inline-block; }

/* Footer */
.button-generator-container footer { padding: 1.5rem 0; background-color: var(--light-color); flex-shrink: 0; margin-top: auto; }
.button-generator-container .copyright { font-size: 0.9em; text-align: center; color: #555; margin: 0; }
.button-generator-container footer .container { padding-top: 0; padding-bottom: 0; }

/* Additional Content */
.button-generator-container .additional-content { margin-top: 2rem; padding-bottom: 2rem; }
.button-generator-container .additional-content h2 { text-align: center; margin-bottom: 1.5rem; font-size: 1.6rem; color: var(--primary-color); }
.button-generator-container .additional-content h3 { margin-top: 2.5rem; margin-bottom: 1rem; border-bottom: 2px solid var(--primary-color); padding-bottom: 0.5rem; font-size: 1.3rem; color: var(--dark-color); }
.button-generator-container .additional-content section { margin-bottom: 2rem; }
.button-generator-container .additional-content p { line-height: 1.8; margin-bottom: 1rem; }
.button-generator-container .additional-content strong { color: var(--primary-color); font-weight: 600; }
.button-generator-container .additional-content ul,
.button-generator-container .additional-content ol { padding-left: 1.5em; margin-bottom: 1rem; list-style-position: outside; }
.button-generator-container .additional-content li { margin-bottom: 0.8rem; line-height: 1.7; }
.button-generator-container .additional-content dl { margin-top: 1rem; }
.button-generator-container .additional-content dt { font-weight: bold; margin-top: 1.5rem; margin-bottom: 0.5rem; color: var(--primary-color); font-size: 1.1em; }
.button-generator-container .additional-content dd { margin-left: 1em; margin-bottom: 1rem; line-height: 1.7; padding-left: 0.5em; border-left: 3px solid #eee; }

/* Responsive Design */
@media (max-width: 900px) {
     .button-generator-container .design-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
     .button-generator-container .container { padding: 0 1rem; }
     .button-generator-container .card { padding: 1rem; }
     .button-generator-container .input-grid { grid-template-columns: 1fr; gap: 1.5rem; }
     .button-generator-container .input-group.button-text-group,
     .button-generator-container .color-settings,
     .button-generator-container .other-settings { grid-column: span 1; }
     .button-generator-container .design-grid { grid-template-columns: 1fr; }
     .button-generator-container .color-picker-grid { grid-template-columns: 1fr; }
}