/**
 * Text Diff Page Styles
 * 텍스트 비교 도구 전용 스타일
 */

/* ========================================
   입력 영역
   ======================================== */

.input-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.input-panel {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-primary);
}

.input-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.input-panel-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.input-panel-info {
    font-size: 12px;
    color: var(--text-muted);
}

.input-wrapper {
    display: flex;
    height: 280px;
}

.input-textarea {
    flex: 1;
    border: none;
    outline: none;
    padding: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.6;
    background: var(--bg-primary);
    color: var(--text-primary);
    resize: none;
    white-space: pre;
    overflow-wrap: normal;
    overflow-x: auto;
}

.input-textarea::placeholder {
    color: var(--text-muted);
}

/* ========================================
   버튼 영역
   ======================================== */

.action-bar {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

/* ========================================
   통계 바
   ======================================== */

.diff-stats-bar {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
}

.diff-stat-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
}

.diff-stat-item.additions {
    color: #16a34a;
}

.diff-stat-item.deletions {
    color: #dc2626;
}

.diff-stat-item.changes {
    color: #d97706;
}

/* ========================================
   결과 영역 - Diffchecker 스타일
   ======================================== */

.diff-result-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.diff-result-panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.diff-result-panel:first-child {
    border-right: 2px solid var(--border);
}

.diff-result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.diff-result-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.diff-result-badge {
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.diff-result-panel:first-child .diff-result-badge {
    background: rgba(239, 68, 68, 0.15);
    color: #dc2626;
}

.diff-result-panel:last-child .diff-result-badge {
    background: rgba(34, 197, 94, 0.15);
    color: #16a34a;
}

.diff-result-content {
    flex: 1;
    overflow-y: auto;
    max-height: 500px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
}

/* ========================================
   Diff 라인
   ======================================== */

.diff-line {
    display: flex;
    min-height: 24px;
    line-height: 24px;
}

.diff-line-num {
    width: 45px;
    padding: 0 10px 0 0;
    text-align: right;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    flex-shrink: 0;
    font-size: 12px;
    user-select: none;
}

.diff-line-text {
    flex: 1;
    padding: 0 12px;
    white-space: pre;
    overflow-x: auto;
}

/* 상태별 스타일 */
.diff-line.unchanged {
    background: transparent;
}

.diff-line.removed {
    background: rgba(239, 68, 68, 0.12);
}

.diff-line.removed .diff-line-num {
    background: rgba(239, 68, 68, 0.2);
    color: #b91c1c;
}

.diff-line.removed .diff-line-text {
    color: #b91c1c;
}

.diff-line.added {
    background: rgba(34, 197, 94, 0.12);
}

.diff-line.added .diff-line-num {
    background: rgba(34, 197, 94, 0.2);
    color: #15803d;
}

.diff-line.added .diff-line-text {
    color: #15803d;
}

.diff-line.empty {
    background: var(--bg-secondary);
    opacity: 0.5;
}

.diff-line.empty .diff-line-num {
    color: transparent;
}

/* ========================================
   동일 메시지
   ======================================== */

.diff-identical {
    grid-column: 1 / -1;
    text-align: center;
    padding: 48px 24px;
    background: var(--bg-secondary);
}

.diff-identical-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: rgba(34, 197, 94, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #16a34a;
}

.diff-identical-icon svg {
    width: 28px;
    height: 28px;
}

.diff-identical-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.diff-identical-desc {
    font-size: 14px;
    color: var(--text-muted);
}

/* ========================================
   동기화 스크롤 옵션
   ======================================== */

.diff-options {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-left: auto;
}

.diff-option {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-muted);
    cursor: pointer;
}

.diff-option input {
    accent-color: var(--accent);
}

/* ========================================
   반응형
   ======================================== */

@media (max-width: 900px) {
    .input-panels {
        grid-template-columns: 1fr;
    }
    
    .diff-result-panels {
        grid-template-columns: 1fr;
    }
    
    .diff-result-panel:first-child {
        border-right: none;
        border-bottom: 2px solid var(--border);
    }
    
    .diff-result-content {
        max-height: 350px;
    }
}