/* CSS Değişkenleri */
:root {
    --primary-color: #3498db;
    --primary-color-rgb: 52, 152, 219;
    --primary-gradient: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    --secondary-color: #2c3e50;
    --light-bg-color: #f8f9fa;
    --dark-text-color: #343a40;
    --muted-text-color: #6c757d;
    --border-color: #dee2e6;
    --category-health-color: #28a745;
    --category-finance-color: #ffc107;
    --category-engineering-color: #dc3545;
    --card-shadow-sm: 0 4px 8px rgba(0, 0, 0, 0.1);
    --card-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --transition-base: all 0.3s ease;
    --error-color: #dc3545;
    --error-color-rgb: 220, 53, 69;
    --success-color: #28a745;
    --success-color-rgb: 40, 167, 69;
}

/* Tüm Hesaplayıcılar İçin Ortak Stiller */
.calculator-container {
    max-width: 900px;
    margin: 0rem auto;
}

.calculator {
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: var(--card-shadow-sm);
    padding: 2rem;
    width: 100%;
    transition: var(--transition-base);
}

.calculator:hover {
    box-shadow: var(--card-shadow-lg);
    transform: translateY(-5px);
}

.calculator h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
    position: relative;
    padding-bottom: 0.75rem;
}

.calculator h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
}

/* Form düzeni için grid sistemi */
.calculator-form {
    margin-bottom: 1.5rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-gap: 1rem;
}

.input-group {
    margin-bottom: 0;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    margin-right: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--dark-text-color);
}

/* Form input sarmalama öğesi */
.input-wrapper {
    position: relative;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
    background-color: var(--light-bg-color);
}

.input-group input:focus,
.input-group select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(var(--primary-color-rgb), 0.25);
}

/* Form doğrulama stilleri */
.input-group input.is-valid,
.input-group select.is-valid {
    border-color: var(--success-color);
}

.input-group input.is-invalid,
.input-group select.is-invalid {
    border-color: var(--error-color);
}

.has-error .form-text {
    display: none;
}

.error-message {
    color: var(--error-color);
    font-size: 0.85rem;
    margin-top: 0.25rem;
    display: none;
    font-weight: 500;
}

.error-message.active {
    display: block;
}

.form-text {
    color: var(--muted-text-color);
    font-size: 0.75rem;
    margin-top: 0.25rem;
    display: block;
}

/* Ekran okuyucular için gizli metin */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* İkon stillerini ortak alana taşıyoruz */
.input-group label i,
.result-container h4 i,
.result-container h5 i,
.info-section h3 i,
.info-section h4 i,
.table i {
    color: var(--primary-color);
    width: 20px;
    text-align: center;
    margin-right: 6px;
}

/* Buton stilleri */
.calculator-btn {
    grid-column: span 2;
    display: block;
    width: 100%;
    padding: 0.75rem;
    background: var(--primary-gradient);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 1rem;
    text-align: center;
}

.calculator-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 123, 255, 0.3);
}

/* Klavye odaklanması için belirgin stil */
.calculator-btn:focus,
.input-group input:focus,
.input-group select:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.5);
}

/* Klavye odaklanması dışında mouse tıklaması ile odaklanmayı ayırt et */
.calculator-btn:focus:not(:focus-visible),
.input-group input:focus:not(:focus-visible),
.input-group select:focus:not(:focus-visible) {
    box-shadow: none;
}

.calculator-btn:focus-visible,
.input-group input:focus-visible,
.input-group select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.5);
}

/* İkincil buton stili */
.calculator-btn.btn-secondary {
    background: linear-gradient(135deg, #6c757d 0%, #495057 100%);
}

.calculator-btn.btn-secondary:hover {
    background: linear-gradient(135deg, #5a6268 0%, #343a40 100%);
}

/* Butonlar yan yana - özel durumlar için */
.btn-group {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-gap: 1rem;
    margin-top: 1rem;
}

.btn-group .calculator-btn {
    grid-column: auto;
    margin-top: 0;
}

.result-container {
    background-color: var(--light-bg-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    box-shadow: var(--card-shadow-sm);
    display: none;
    position: relative;
}

/* Sonuç alanına odaklandığında belirgin olması için stil */
.result-container:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.5);
}

.result-container h4 {
    color: var(--primary-color);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.result-container h5 {
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.result-value {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--dark-text-color);
}

.result-details {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--muted-text-color);
}

.result-highlight {
    color: var(--primary-color);
    font-weight: 600;
}

.info-section {
    background-color: #ffffff;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--card-shadow-sm);
    margin-top: 2rem;
    transition: var(--transition-base);
}

.info-section:hover {
    box-shadow: var(--card-shadow-lg);
}

.info-section h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--primary-color);
}

.info-section h4 {
    color: var(--dark-text-color);
    font-size: 1.2rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem;
}

.info-section p {
    line-height: 1.6;
    margin-bottom: 1rem;
    color: var(--muted-text-color);
}

.info-section ul {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.info-section li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
    color: var(--muted-text-color);
}

.info-section strong {
    color: var(--dark-text-color);
    font-weight: 600;
}

.formula {
    background-color: var(--light-bg-color);
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
}

.formula h5 {
    margin-bottom: 0.5rem;
    color: var(--dark-text-color);
    font-weight: 600;
}

.info-section table {
    width: 100%;
    margin: 1.5rem 0;
    border-collapse: collapse;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--card-shadow-sm);
}

.info-section table th,
.info-section table td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.info-section table th {
    background-color: var(--primary-color);
    color: #fff;
    font-weight: 600;
    text-align: left;
}

.info-section table tr:nth-child(even) {
    background-color: var(--light-bg-color);
}

/* Bootstrap benzeri yardımcı sınıflar */
.text-primary {
    color: var(--primary-color) !important;
}

.text-success {
    color: var(--category-health-color) !important;
}

.text-warning {
    color: var(--category-finance-color) !important;
}

.text-danger {
    color: var(--category-engineering-color) !important;
}

.bg-light {
    background-color: var(--light-bg-color) !important;
}

.rounded {
    border-radius: 8px !important;
}

.p-3 {
    padding: 1rem !important;
}

.my-3 {
    margin-top: 1rem !important;
    margin-bottom: 1rem !important;
}

.mt-3 {
    margin-top: 1rem !important;
}

.mb-3 {
    margin-bottom: 1rem !important;
}

/* Duyarlı tasarım düzeltmeleri */
@media (max-width: 768px) {
    .calculator, .info-section {
        padding: 1.5rem;
    }
    
    .calculator-form {
        grid-template-columns: 1fr;
        grid-gap: 1rem;
    }
    
    .calculator-btn {
        grid-column: 1;
    }
    
    .btn-group {
        grid-template-columns: 1fr;
        grid-column: 1;
    }
    
    .calculator h3, .info-section h3 {
        font-size: 1.3rem;
    }
    
    .info-section h4 {
        font-size: 1.1rem;
    }
}

@media (max-width: 576px) {
    .calculator, .info-section {
        padding: 1.25rem;
    }
    
    .calculator h3, .info-section h3 {
        font-size: 1.2rem;
    }
    
    .input-group label {
        font-size: 0.9rem;
    }
    
    .input-group input,
    .input-group select {
        padding: 0.6rem 0.8rem;
    }
    
    .calculator-btn {
        padding: 0.6rem;
    }
    
    .info-section table th,
    .info-section table td {
        padding: 0.5rem;
        font-size: 0.8rem;
    }
}

/* Hesaplayıcı Kartlarının Bulunduğu Bölüm */
.calculator-cards-section {
    background-color: #f9fafb;
    padding: 20px 0 40px;
    position: relative;
}

.calculator-cards-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23000000' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
    z-index: 0;
}

.calculator-cards-section .container {
    position: relative;
    z-index: 1;
}

/* Hesaplayıcı Kartları - Özel Stiller */
.calculator-card {
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 15px;
}

.calculator-card .card {
    border-radius: 10px;
    transition: all 0.3s ease;
    border: 2px solid rgba(0,0,0,0.15) !important; /* !important ile öncelik verdik */
    box-shadow: 0 6px 15px rgba(0,0,0,0.08) !important; /* !important ile öncelik verdik */
    position: relative;
    z-index: 1;
    background-color: #ffffff;
}

.calculator-card .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 10px;
    background: linear-gradient(145deg, rgba(255,255,255,0.8) 0%, rgba(255,255,255,0.4) 100%);
    z-index: -1;
}

.calculator-card:hover .card {
    transform: translateY(-8px);
    box-shadow: 0 15px 25px rgba(0,0,0,0.15) !important;
    border: 1px solid rgba(var(--bs-primary-rgb), 0.2);
}

.calculator-icon {
    width: 55px;
    height: 55px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    font-size: 1.2rem;
}

.calculator-card:hover .calculator-icon {
    transform: scale(1.1);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.calculator-title {
    font-weight: 600;
    margin-bottom: 5px;
    transition: all 0.3s ease;
    color: #333;
    font-size: 1.1rem;
}

.calculator-card:hover .calculator-title {
    color: var(--bs-primary);
}

/* En Popüler Hesaplayıcı Kartı */
.most-popular-calculator {
    background: linear-gradient(to right, rgba(255,255,255,0.9), rgba(253,243,243,0.9));
    border: 2px solid rgba(220,53,69,0.2);
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(220,53,69,0.15);
    transition: all 0.3s ease;
    margin-bottom: 2rem;
}

.most-popular-calculator:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(220,53,69,0.2);
}

.most-popular-calculator .calculator-card {
    margin-bottom: 0;
}

.most-popular-calculator .card {
    background: transparent;
    border: none !important;
    box-shadow: none !important;
}

.most-popular-calculator .calculator-icon {
    width: 65px;
    height: 65px;
    box-shadow: 0 8px 15px rgba(0,0,0,0.15);
    font-size: 1.5rem;
}

.most-popular-calculator .calculator-title {
    font-size: 1.4rem;
    color: #333;
}

.most-popular-calculator .btn-primary {
    padding: 0.5rem 1.5rem;
    font-weight: 500;
    box-shadow: 0 4px 8px rgba(0,123,255,0.2);
    transition: all 0.3s ease;
}

.most-popular-calculator .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,123,255,0.3);
}

@media (max-width: 767.98px) {
    .most-popular-calculator .row {
        flex-direction: column;
    }
    
    .most-popular-calculator .calculator-item {
        justify-content: flex-start;
        margin-top: 1rem;
        margin-left: 5rem;
    }
}

/* WCAG için yüksek kontrast modunda görünürlük desteği */
@media (forced-colors: active) {
    .calculator-btn {
        border: 2px solid;
    }
    
    .input-group input,
    .input-group select {
        border: 2px solid;
    }
    
    .result-container {
        border: 1px solid;
    }
}

/* Dokunmatik ekranlar için daha büyük etkileşim alanları */
@media (pointer: coarse) {
    .calculator-btn {
        padding: 1rem;
        min-height: 48px;
    }
    
    .input-group input,
    .input-group select {
        padding: 0.875rem 1rem;
        min-height: 48px;
        font-size: 16px; /* iOS'ta yakınlaştırmayı engellemek için en az 16px */
    }
}