* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-app: #1e1e1e;
    --bg-pane: #252526;
    --bg-header: #333333;
    --text-primary: #d4d4d4;
    --text-secondary: #808080;
    --border: #3c3c3c;
    --accent: #0e639c;
    --accent-hover: #1177bb;
    --success: #4ec9b0;
}

body {
    font-family: 'Consolas', 'Monaco', monospace;
    background: var(--bg-app);
    color: var(--text-primary);
    min-height: 100vh;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border);
}

.header h1 {
    font-size: 1rem;
    font-weight: 500;
}

.btn-secondary {
    padding: 0.4rem 0.8rem;
    border: none;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    background: var(--bg-pane);
    color: var(--text-primary);
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: var(--border);
}

.main-content {
    flex: 1;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* プレビュー */
.preview-section {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.color-preview {
    flex: 1;
    height: 80px;
    background: #000000;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.color-picker {
    width: 60px;
    height: 60px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    padding: 0;
}

.color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker::-webkit-color-swatch {
    border: 2px solid var(--border);
    border-radius: 6px;
}

/* 変換フォーム */
.converter-section {
    background: var(--bg-pane);
    border-radius: 6px;
    padding: 1rem;
}

.format-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.format-row:last-child {
    margin-bottom: 0;
}

.format-label {
    min-width: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--success);
}

.format-input {
    display: flex;
    align-items: center;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0 0.5rem;
}

.format-input .prefix {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.format-input input {
    width: 80px;
    padding: 0.4rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
    outline: none;
}

.format-inputs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.input-group {
    display: flex;
    align-items: center;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0 0.5rem;
}

.input-group .label-sm {
    color: var(--text-secondary);
    font-size: 0.75rem;
    min-width: 12px;
}

.input-group input {
    width: 50px;
    padding: 0.4rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
    outline: none;
}

.copy-btn {
    padding: 0.3rem 0.6rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
    transition: all 0.2s;
}

.copy-btn:hover {
    background: var(--border);
    color: var(--text-primary);
}

/* CSS変数セクション */
.cssvar-section {
    background: var(--bg-pane);
    border-radius: 6px;
}

.cssvar-content {
    padding: 0.75rem;
}

.cssvar-input-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.cssvar-prefix {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.cssvar-input-row input {
    flex: 1;
    padding: 0.4rem 0.5rem;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
}

.cssvar-output {
    padding: 0.75rem;
    background: var(--bg-app);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--success);
    white-space: pre-wrap;
    word-break: break-all;
    margin: 0;
    min-height: 60px;
}

/* CSS出力 */
.output-section {
    background: var(--bg-pane);
    border-radius: 6px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-secondary);
    border-radius: 6px 6px 0 0;
}

/* カラーネーム */
.colorname-section {
    background: var(--bg-pane);
    border-radius: 6px;
}

.colorname-content {
    padding: 0.75rem;
}

.closest-color-display {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.closest-swatch {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

.closest-info {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: baseline;
}

.closest-name {
    font-size: 1rem;
    color: var(--success);
    font-weight: 500;
}

.closest-hex {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.closest-match {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.css-outputs {
    padding: 0.75rem;
}

.css-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.3rem 0;
    border-bottom: 1px solid var(--border);
}

.css-row:last-child {
    border-bottom: none;
}

.css-value {
    font-size: 0.85rem;
    color: var(--success);
}

.copy-sm {
    padding: 0.2rem 0.4rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-size: 0.65rem;
    cursor: pointer;
}

.copy-sm:hover {
    background: var(--border);
    color: var(--text-primary);
}

/* コントラストセクション */
.contrast-section {
    background: var(--bg-pane);
    border-radius: 6px;
}

.contrast-content {
    padding: 0.75rem;
}

.contrast-inputs {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.contrast-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.contrast-fg {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contrast-fg input[type="color"] {
    width: 30px;
    height: 30px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    padding: 0;
}

.contrast-fg input[type="text"] {
    width: 80px;
    padding: 0.4rem;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.8rem;
}

.contrast-preview {
    padding: 1rem;
    border-radius: 4px;
    text-align: center;
    margin-bottom: 0.75rem;
}

.contrast-preview span {
    font-size: 1rem;
    font-weight: 500;
}

.contrast-result {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.ratio-display {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.ratio-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--success);
}

.wcag-badges {
    display: flex;
    gap: 0.3rem;
}

.wcag-badge {
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-size: 0.7rem;
    font-weight: 500;
}

.wcag-badge.pass {
    background: rgba(78, 201, 176, 0.2);
    color: var(--success);
}

.wcag-badge.fail {
    background: rgba(241, 76, 76, 0.2);
    color: #f14c4c;
}

/* パレット */
.palette-section {
    background: var(--bg-pane);
    border-radius: 6px;
}

.related-colors {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 0.5rem;
    padding: 0.75rem;
}

.related-color {
    height: 40px;
    border-radius: 4px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
}

.related-color:hover {
    border-color: var(--text-primary);
    transform: scale(1.05);
}

/* フッター */
.footer {
    padding: 0.5rem 1rem;
    background: var(--bg-header);
    border-top: 1px solid var(--border);
    font-size: 0.7rem;
    color: var(--text-secondary);
}

/* トースト */
.toast {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    background: var(--success);
    color: var(--bg-app);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.2s;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

/* レスポンシブ */
@media (max-width: 600px) {
    .format-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .format-inputs {
        width: 100%;
    }

    .input-group {
        flex: 1;
    }
}