/* Reset ve Temel Stiller */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #1f2937;
    line-height: 1.6;
    min-height: 100vh;
}

/* Container Stilleri */
.container {
    max-width: 1000px;
    margin: 20px auto;
    background: rgba(255, 255, 255, 0.95);
    padding: 50px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Başlık Stilleri */
h1 {
    margin: 0 0 20px 0;
    font-weight: 800;
    color: #2d3748;
    text-align: center;
    font-size: 2.2rem;
    background: linear-gradient(45deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    margin: 0 0 15px 0;
    font-weight: 600;
    color: #4a5568;
    font-size: 1.4rem;
}

/* Input Container */
.input-container {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

/* Grade Calculator Specific Styles */
.ders-sayisi-container {
    background: linear-gradient(135deg, #667eea, #764ba2);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.2);
}

.ders-sayisi-container label {
    display: block;
    color: #ffffff;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.ders-sayisi-container input {
    width: 200px;
    padding: 12px 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    color: #2d3748;
    margin: 0 10px;
    transition: all 0.3s ease;
}

.ders-sayisi-container input:focus {
    border-color: #ffffff;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
    background: #ffffff;
    transform: scale(1.05);
}

.ders-sayisi-container button {
    background: linear-gradient(45deg, #ffffff, #f8f9fa);
    color: #667eea;
    border: 2px solid rgba(255, 255, 255, 0.8);
    font-weight: 700;
    padding: 12px 20px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
    margin-left: 10px;
}

.ders-sayisi-container button:hover {
    background: linear-gradient(45deg, #f8f9fa, #e9ecef);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.4);
}

.grade-input-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.grade-input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.grade-input-group h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: #4a5568;
    text-align: center;
}

.grade-input-group input {
    width: 100%;
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    padding: 12px 15px;
}

.grade-input-group input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: scale(1.02);
}

/* Ortak Input Stilleri */
#sayi, #us, #dogum, #santigrat, #fahrenheit, #boy, #kilo, #birinicidikkenar, #ikincidikkenar, #not1, #not2, #not3, #not4, #not5, #not6, #not7, #not8, #dersSayisi, #litre, #galon {
    flex: 1;
    padding: 15px 18px;
    border: 2px solid #e2e8f0;
    border-radius: 15px;
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
    background: #ffffff;
    font-weight: 500;
}

#sayi:focus, #us:focus, #dogum:focus, #santigrat:focus, #fahrenheit:focus, #boy:focus, #kilo:focus, #birinicidikkenar:focus, #ikincidikkenar:focus, #not1:focus, #not2:focus, #not3:focus, #not4:focus, #not5:focus, #not6:focus, #not7:focus, #not8:focus, #dersSayisi:focus, #litre:focus, #galon:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 5px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

#sayi::placeholder, #us::placeholder {
    color: #a0aec0;
    font-weight: 400;
}

/* Date Input Özel Stilleri */
#dogum {
    color: #4a5568;
    cursor: pointer;
}

#dogum::-webkit-calendar-picker-indicator {
    background: linear-gradient(45deg, #667eea, #764ba2);
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
    filter: brightness(1.1);
}

#dogum::-webkit-calendar-picker-indicator:hover {
    background: linear-gradient(45deg, #5a67d8, #6b46c1);
    transform: scale(1.1);
}

/* Firefox için date input */
#dogum::-moz-calendar-picker-indicator {
    background: linear-gradient(45deg, #667eea, #764ba2);
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
}

/* Hacim Çevirme Özel Stilleri */
.volume-section {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    border-radius: 15px;
    padding: 25px;
    margin: 20px 0;
    box-shadow: 0 8px 25px rgba(79, 172, 254, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.volume-section h3 {
    color: #ffffff;
    font-weight: 600;
    font-size: 1.1rem;
    margin: 0 0 15px 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.volume-section input {
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: #2d3748;
}

.volume-section input:focus {
    border-color: #ffffff;
    box-shadow: 0 0 0 5px rgba(255, 255, 255, 0.2);
    background: #ffffff;
}

.volume-section button {
    background: linear-gradient(45deg, #ffffff, #f8f9fa);
    color: #4facfe;
    border: 2px solid rgba(255, 255, 255, 0.8);
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
}

.volume-section button:hover {
    background: linear-gradient(45deg, #f8f9fa, #e9ecef);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.4);
}

.volume-section button:active {
    transform: translateY(0);
}

/* Sıcaklık Çevirme Özel Stilleri */
.temperature-section {
    background: linear-gradient(135deg, #ff6b6b, #ffa726);
    border-radius: 15px;
    padding: 25px;
    margin: 20px 0;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.temperature-section h3 {
    color: #ffffff;
    font-weight: 600;
    font-size: 1.1rem;
    margin: 0 0 15px 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.temperature-section input {
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: #2d3748;
}

.temperature-section input:focus {
    border-color: #ffffff;
    box-shadow: 0 0 0 5px rgba(255, 255, 255, 0.2);
    background: #ffffff;
}

.temperature-section button {
    background: linear-gradient(45deg, #ffffff, #f8f9fa);
    color: #ff6b6b;
    border: 2px solid rgba(255, 255, 255, 0.8);
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
}

.temperature-section button:hover {
    background: linear-gradient(45deg, #f8f9fa, #e9ecef);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.4);
}

.temperature-section button:active {
    transform: translateY(0);
}

/* Hacim Sonuç Stili */
.volume-result {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: #ffffff;
    padding: 20px;
    border-radius: 15px;
    font-weight: 700;
    font-size: 1.3rem;
    text-align: center;
    margin-top: 20px;
    box-shadow: 0 8px 25px rgba(79, 172, 254, 0.3);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Sıcaklık Sonuç Stili */
.temperature-result {
    background: linear-gradient(135deg, #ff6b6b, #ffa726);
    color: #ffffff;
    padding: 20px;
    border-radius: 15px;
    font-weight: 700;
    font-size: 1.3rem;
    text-align: center;
    margin-top: 20px;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.3);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Button Stilleri */
#calculate, #calculateCtoF, #calculateFtoC {
    padding: 15px 25px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: #ffffff;
    border: none;
    border-radius: 15px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#calculate:hover, #calculateCtoF:hover, #calculateFtoC:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(102, 126, 234, 0.4);
}

#calculate:active, #calculateCtoF:active, #calculateFtoC:active {
    transform: translateY(-1px);
}

/* Sonuç Stilleri */
#sonuc {
    margin-top: 20px;
    padding: 20px;
    background: linear-gradient(45deg, #f7fafc, #edf2f7);
    border-radius: 15px;
    font-weight: 700;
    font-size: 1.2rem;
    text-align: center;
    color: #2d3748;
    border-left: 5px solid #667eea;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

#bolenler {
    margin-top: 10px;
    padding: 15px;
    background: #fff5f5;
    border-radius: 10px;
    font-weight: 600;
    color: #c53030;
    border-left: 4px solid #fc8181;
}

/* Açıklama Metni */
p {
    color: #4a5568;
    line-height: 1.7;
    margin: 15px 0;
    font-size: 1rem;
}

/* Ana Sayfa Özel Stilleri */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.subtitle {
    color: #6b7280;
    font-size: 1.2rem;
    margin-bottom: 0;
    font-weight: 500;
}


/* Kategoriler */
.categories {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.category-section {
    margin-bottom: 0;
}

.category-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid #667eea;
    display: inline-block;
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.calculator-card {
    background: rgba(255, 255, 255, 0.9);
    padding: 25px;
    border-radius: 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.calculator-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    background: rgba(255, 255, 255, 0.95);
}

.calculator-card h3 {
    color: #2d3748;
    font-size: 1.3rem;
    font-weight: 700;
    margin: 0 0 15px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.calculator-card p {
    color: #6b7280;
    font-size: 1rem;
    line-height: 1.6;
    margin: 0 0 20px 0;
}

.calculator-link {
    display: inline-block;
    padding: 12px 24px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: #ffffff;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.calculator-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    background: linear-gradient(45deg, #5a67d8, #6b46c1);
}

.calculator-link:active {
    transform: translateY(0);
}

/* Responsive Tasarım */
@media (max-width: 768px) {
    .container {
        margin: 15px;
        padding: 25px;
        border-radius: 15px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .header {
        margin-bottom: 30px;
    }
    
    
    .categories {
        gap: 30px;
    }
    
    .category-title {
        font-size: 1.25rem;
    }
    
    .calculator-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .calculator-card {
        padding: 20px;
    }
    
    .input-container {
        flex-direction: column;
        gap: 12px;
    }
    
    .ders-sayisi-container {
        padding: 20px;
    }
    
    .ders-sayisi-container label {
        font-size: 1rem;
    }
    
    .ders-sayisi-container input {
        width: 150px;
        margin: 5px;
    }
    
    .ders-sayisi-container button {
        margin-left: 5px;
        padding: 10px 15px;
    }
    
    .grade-input-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .grade-input-group h3 {
        font-size: 0.9rem;
    }
    
    .grade-input-group input {
        font-size: 16px;
        padding: 10px 12px;
    }
    
    #calculate {
        width: 100%;
        padding: 18px;
    }
}

@media (max-width: 480px) {
    .container {
        margin: 10px;
        padding: 20px;
    }
    
    h1 {
        font-size: 1.6rem;
    }
    
    .header {
        margin-bottom: 25px;
    }
    
    
    .categories {
        gap: 25px;
    }
    
    .category-title {
        font-size: 1.125rem;
    }
    
    .calculator-card {
        padding: 16px;
    }
    
    .calculator-card h3 {
        font-size: 1.1rem;
    }
    
    .calculator-card p {
        font-size: 0.9rem;
    }
    
    .ders-sayisi-container {
        padding: 15px;
    }
    
    .ders-sayisi-container label {
        font-size: 0.9rem;
    }
    
    .ders-sayisi-container input {
        width: 120px;
        font-size: 14px;
        padding: 8px 12px;
        margin: 3px;
    }
    
    .ders-sayisi-container button {
        margin-left: 3px;
        padding: 8px 12px;
        font-size: 14px;
    }
    
    .grade-input-container {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .grade-input-group h3 {
        font-size: 0.85rem;
    }
    
    .grade-input-group input {
        font-size: 15px;
        padding: 8px 10px;
    }
    
    #sayi, #us {
        padding: 12px 15px;
        font-size: 15px;
    }
}