.coverage-tool {
    margin-bottom: 2rem;
}

.tool-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 1.5rem;
}

.panel-header {
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color, #e5e7eb);
}

.panel-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary, #111827);
}

.input-panel,
.output-panel {
    background: var(--bg-card, #ffffff);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary, #374151);
    margin-bottom: 0.5rem;
}

.textarea-wrapper {
    position: relative;
    display: block;
    width: 100%;
}

.coverage-input {
    width: 100%;
    padding: 0.75rem;
    padding-right: 3rem;
    border: 2px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    
    font-size: 0.875rem;
    line-height: 1.5;
    resize: vertical;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: var(--bg-input, #ffffff);
    box-sizing: border-box;
}

.coverage-input:focus {
    outline: none;
    border-color: var(--primary-color, #3b82f6);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.upload-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: var(--bg-secondary, #f3f4f6);
    border: none;
    border-radius: 6px;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--text-secondary, #6b7280);
    transition: background-color 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.upload-btn:hover {
    background: var(--bg-hover, #e5e7eb);
    color: var(--text-primary, #111827);
}

.format-select,
.number-input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    font-size: 0.875rem;
    background: var(--bg-input, #ffffff);
    color: var(--text-primary, #111827);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.format-select:focus,
.number-input:focus {
    outline: none;
    border-color: var(--primary-color, #3b82f6);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.settings-group {
    margin-bottom: 1.5rem;
}

.setting-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.setting-item {
    display: flex;
    flex-direction: column;
}

.options-group {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-secondary, #f9fafb);
    border-radius: 8px;
}

.options-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary, #111827);
    margin: 0 0 0.75rem 0;
}

.checkbox-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary, #374151);
}

.checkbox-item input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    cursor: pointer;
    accent-color: var(--primary-color, #3b82f6);
}

.action-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary,
.btn-outline {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: var(--primary-color, #3b82f6);
    color: white;
    flex: 1;
    min-width: 140px;
}

.btn-primary:hover {
    background: var(--primary-hover, #2563eb);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    background: var(--bg-secondary, #f3f4f6);
    color: var(--text-primary, #111827);
}

.btn-secondary:hover {
    background: var(--bg-hover, #e5e7eb);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color, #3b82f6);
    border: 2px solid var(--primary-color, #3b82f6);
}

.btn-outline:hover {
    background: var(--primary-color, #3b82f6);
    color: white;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.metric-card {
    background: var(--bg-secondary, #f9fafb);
    border-radius: 10px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.metric-card[data-metric="line"] {
    border-left: 4px solid #3b82f6;
}

.metric-card[data-metric="branch"] {
    border-left: 4px solid #10b981;
}

.metric-card[data-metric="function"] {
    border-left: 4px solid #8b5cf6;
}

.metric-card[data-metric="overall"] {
    border-left: 4px solid #f59e0b;
}

.metric-icon {
    font-size: 1.5rem;
}

.metric-content {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-secondary, #6b7280);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metric-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary, #111827);
}

.metric-bar {
    height: 6px;
    background: var(--bg-tertiary, #e5e7eb);
    border-radius: 3px;
    overflow: hidden;
}

.metric-fill {
    height: 100%;
    background: var(--primary-color, #3b82f6);
    border-radius: 3px;
    transition: width 0.6s ease-out;
}

.metric-card[data-metric="line"] .metric-fill {
    background: #3b82f6;
}

.metric-card[data-metric="branch"] .metric-fill {
    background: #10b981;
}

.metric-card[data-metric="function"] .metric-fill {
    background: #8b5cf6;
}

.metric-card[data-metric="overall"] .metric-fill {
    background: #f59e0b;
}

.stats-panel {
    background: var(--bg-secondary, #f9fafb);
    border-radius: 10px;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.stats-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary, #111827);
    margin: 0 0 1rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary, #6b7280);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary, #111827);
}

.output-group {
    margin-top: 1.5rem;
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.output-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    background: transparent;
    border: none;
    padding: 0.5rem;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-secondary, #6b7280);
    transition: background-color 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: var(--bg-hover, #e5e7eb);
    color: var(--text-primary, #111827);
}

.report-output {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    
    font-size: 0.875rem;
    line-height: 1.5;
    resize: vertical;
    background: var(--bg-input, #ffffff);
    color: var(--text-primary, #111827);
    min-height: 300px;
}

.report-output:focus {
    outline: none;
    border-color: var(--primary-color, #3b82f6);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

@media (max-width: 1024px) {
    .tool-grid {
        grid-template-columns: 1fr;
    }

    .setting-row {
        grid-template-columns: 1fr;
    }

    .checkbox-grid {
        grid-template-columns: 1fr;
    }

    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .coverage-tool {
        margin-top: 1rem;
    }

    .input-panel,
    .output-panel {
        padding: 1rem;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary,
    .btn-outline {
        width: 100%;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .metric-value {
        font-size: 1.5rem;
    }

    .panel-header h2 {
        font-size: 1.25rem;
    }
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}