/* CTR 계산기 전용 CSS */

.ctr-result-summary {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 50%, #a78bfa 100%);
    border-radius: 14px;
    padding: 30px;
    color: #fff;
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.35);
}

.summary-main {
    text-align: center;
    margin-bottom: 20px;
}

.summary-main .summary-label {
    display: block;
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: 8px;
}

.summary-main .summary-value {
    font-size: 2.5rem;
    font-weight: 700;
}

.summary-main .summary-unit {
    font-size: 1.2rem;
    opacity: 0.9;
}

.summary-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.3);
    margin: 20px 0;
}

.summary-row {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.summary-item {
    flex: 1;
    min-width: 120px;
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 10px;
    text-align: center;
}

.summary-item .summary-label {
    display: block;
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 5px;
}

.summary-item .summary-value {
    font-size: 1.3rem;
    font-weight: 700;
}

.summary-item .summary-unit {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* 결과 해석 섹션 */
.interpretation-section {
    margin-top: 25px;
    padding: 25px;
    background: #fff;
    border: 2px solid var(--border-color);
    border-radius: 14px;
}

.interpretation-section h4 {
    margin-bottom: 20px;
    color: var(--dark-text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.interpretation-content {
    margin-bottom: 20px;
}

.interpretation-item {
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 15px;
}

.interpretation-item.excellent {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #fff;
}

.interpretation-item.good {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: #fff;
}

.interpretation-item.fair {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: #fff;
}

.interpretation-item.poor {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: #fff;
}

.interpretation-item h5 {
    margin-bottom: 10px;
    font-size: 1.1rem;
    font-weight: 600;
}

.interpretation-item p {
    margin: 0;
    line-height: 1.6;
}

.disclaimer {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    font-size: 0.9rem;
    color: #6c757d;
    border-left: 4px solid #dee2e6;
}

/* 반응형 */
@media (max-width: 768px) {
    .summary-row {
        flex-direction: column;
    }

    .summary-item {
        margin-bottom: 10px;
    }
}

/* CTR 활용 팁 스타일 */
.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.tip-card {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.tip-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #8b5cf6, #7c3aed);
}

.tip-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.tip-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    display: block;
}

.tip-card h4 {
    color: #1a1a1a;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.4;
}

.tip-card p {
    color: #666;
    line-height: 1.6;
    margin: 0;
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .tips-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .tip-card {
        padding: 20px;
    }

    .tip-icon {
        font-size: 2rem;
    }

    .tip-card h4 {
        font-size: 1.1rem;
    }
}

/* ========== 에러 배너 스타일 (Alert 제거용) ========== */
.form-error {
    background: linear-gradient(135deg, #fee 0%, #fef2f2 100%);
    border: 1px solid #f5c6cb;
    border-left: 4px solid #e74c3c;
    border-radius: 8px;
    padding: 14px 16px;
    margin-bottom: 20px;
    font-size: 14px;
    color: #721c24;
    line-height: 1.6;
    animation: slideInDown 0.3s ease;
}

.form-error strong {
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}