/* Genel Ayarlar */
:root {
    --bg-dark: #1a1a2e; /* Koyu arka plan */
    --card-bg: #22254e; /* Kart arka planı */
    --text-light: #e0e0e0; /* Açık metin rengi */
    --accent-blue: #0f3460; /* Vurgu mavisi */
    --accent-purple: #533483; /* Vurgu moru */
    --gradient-start: #0f3460; /* Gradyan başlangıç */
    --gradient-end: #533483;   /* Gradyan bitiş */
    --input-bg: #3a3b5c; /* Input arka planı */
    --border-color: #4a4e69; /* Kenarlık rengi */
    --button-hover: #4e2978; /* Buton hover */
    --success-color: #4CAF50; /* Başarı rengi */
    --error-color: #f44336; /* Hata rengi */
    --warning-color: #FFC107; /* Stopaj için uyarı rengi */
}

body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-dark), #0a0a1a); /* Genel arka plan gradyanı */
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden; /* Yatay kaydırmayı engelle */
}

.container {
    width: 90%;
    max-width: 600px;
    margin: 20px auto;
    background-color: transparent; /* Konteynerin kendi arka planı şeffaf */
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4); /* Derinlik için gölge */
    overflow: hidden;
    animation: fadeIn 1s ease-out; /* Sayfa yüklenirken hafif giriş animasyonu */
}

/* Header */
.header {
    text-align: center;
    padding: 30px 20px;
    background: linear-gradient(45deg, var(--gradient-start), var(--gradient-end)); /* Header gradyanı */
    border-bottom: 2px solid var(--border-color);
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    animation: rotateBackground 20s linear infinite; /* Hafif arka plan animasyonu */
    z-index: 0;
}

.logo-title {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px; /* İkon ile başlık arası boşluk */
    margin-bottom: 10px;
    position: relative;
    z-index: 1;
}

.logo-title i {
    color: #fff;
    font-size: 2.8em; /* İkon boyutu */
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.4);
}

.header h1 {
    margin: 0; /* Otomatik marginleri kaldır */
    font-size: 2.5em;
    color: #fff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    position: relative;
    z-index: 1;
}

.header p {
    font-size: 1.1em;
    color: var(--text-light);
    opacity: 0.8;
    position: relative;
    z-index: 1;
}

/* Calculator Card */
.calculator-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-bottom-left-radius: 15px;
    border-bottom-right-radius: 15px;
}

.input-group {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-group label {
    display: flex; /* İkon ve metni hizalamak için */
    align-items: center;
    gap: 8px; /* İkon ile label metni arası boşluk */
    font-weight: 600;
    color: var(--text-light);
    font-size: 1.05em;
    min-width: 130px; /* Label için sabit genişlik, hizalama sağlar */
}

.input-group label .icon {
    color: var(--accent-blue);
    font-size: 1.2em;
}

.input-group input[type="number"],
.input-group input[type="text"] {
    flex-grow: 1;
    padding: 12px 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--input-bg);
    color: var(--text-light);
    font-size: 1.1em;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.input-group input[type="number"]:focus,
.input-group input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(15, 52, 96, 0.5);
}

/* Select Box Styling */
.select-box {
    padding: 12px 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--input-bg);
    color: var(--text-light);
    font-size: 1.0em;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg fill="%23e0e0e0" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/><path d="M0 0h24v24H0z" fill="none"/></svg>');
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 20px;
    cursor: pointer;
    transition: border-color 0.3s ease;
    flex-shrink: 0;
}

.select-box:focus {
    outline: none;
    border-color: var(--accent-blue);
}

/* Checkbox Styling */
.checkbox-group {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    padding-left: 140px;
}

.checkbox-group input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    background-color: var(--input-bg);
    cursor: pointer;
    position: relative;
    transition: background-color 0.3s, border-color 0.3s;
    margin-right: 10px;
    flex-shrink: 0;
}

.checkbox-group input[type="checkbox"]:checked {
    background-color: var(--accent-blue);
    border-color: var(--accent-blue);
}

.checkbox-group input[type="checkbox"]:checked::after {
    content: '\2713';
    color: #fff;
    font-size: 14px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.checkbox-group label {
    font-weight: 500;
    cursor: pointer;
    margin-bottom: 0;
    min-width: auto;
}

/* Buttons */
.btn {
    display: block;
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 8px;
    font-size: 1.2em;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.calculate-btn {
    background: linear-gradient(45deg, var(--gradient-start), var(--gradient-end));
    color: #fff;
    margin-top: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.calculate-btn:hover {
    background: linear-gradient(45deg, var(--accent-blue), var(--button-hover));
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.calculate-btn:active {
    transform: translateY(0);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
}

.reset-btn {
    background-color: var(--input-bg);
    color: var(--text-light);
    margin-top: 20px;
    border: 1px solid var(--border-color);
}

.reset-btn:hover {
    background-color: var(--border-color);
    transform: translateY(-2px);
}

.reset-btn:active {
    transform: translateY(0);
}

/* Result Section */
.result-section, .chart-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.result-section.visible, .chart-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.result-section h2, .chart-section h2 {
    color: var(--accent-blue);
    font-size: 1.8em;
    margin-bottom: 20px;
    position: relative;
    display: flex; /* Başlık ve ikonu hizalamak için */
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.result-section h2::after, .chart-section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
    margin: 10px auto 0;
    border-radius: 5px;
    position: absolute;
    bottom: -10px; /* Başlık altına al */
    left: 50%;
    transform: translateX(-50%);
}

.result-icon-title {
    color: var(--accent-blue);
    font-size: 1.1em;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
}

.result-item:last-child {
    border-bottom: none;
}

.result-item span {
    display: flex; /* İkon ve metni hizalamak için */
    align-items: center;
    gap: 8px; /* İkon ile metin arası boşluk */
    font-size: 1.15em;
    font-weight: 500;
}

.result-item .result-icon {
    color: var(--accent-blue);
    font-size: 1em;
}


.result-value {
    font-weight: 700;
    color: var(--success-color);
    font-size: 1.25em;
}

.tax-value {
    color: var(--warning-color);
}

.yield-value {
    color: #64ffda;
}

.total-value {
    color: #00e676;
    font-size: 1.35em;
}

.final-amount-item {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 2px solid var(--border-color);
}

.hidden {
    display: none !important;
}

/* Chart Summary Styling */
.chart-summary {
    background-color: var(--input-bg);
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
    text-align: left;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.chart-summary p {
    margin-bottom: 8px;
    font-size: 1.05em;
    color: var(--text-light);
}

.chart-summary strong {
    color: var(--success-color);
    font-size: 1.1em;
}

.chart-summary span.percentage {
    color: #64ffda; /* Yüzde için farklı renk */
    font-weight: 700;
    margin-left: 5px;
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 20px;
}

/* Animasyonlar */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes rotateBackground {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Mobil Uyumluluk */
@media (max-width: 768px) {
    .container {
        width: 95%;
        margin: 10px auto;
        border-radius: 0;
        box-shadow: none;
    }

    .header {
        border-top-left-radius: 0;
        border-top-right-radius: 0;
    }

    .calculator-card {
        padding: 20px;
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0;
    }

    .logo-title {
        flex-direction: column;
        gap: 5px;
    }

    .logo-title i {
        font-size: 2.2em;
    }

    .header h1 {
        font-size: 2em;
    }

    .header p {
        font-size: 1em;
    }

    .input-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }

    .input-group label {
        min-width: auto;
        margin-bottom: 5px;
    }

    .input-group input,
    .select-box {
        width: 100%;
        box-sizing: border-box;
    }

    .checkbox-group {
        padding-left: 0;
        justify-content: flex-start;
    }

    .input-group label,
    .input-group input,
    .btn,
    .result-item span,
    .result-value {
        font-size: 1em;
    }

    .result-section h2, .chart-section h2 {
        font-size: 1.5em;
        flex-direction: column;
        gap: 5px;
    }
    .result-section h2::after, .chart-section h2::after {
        position: static;
        transform: none;
        margin: 10px auto 0;
    }

    .chart-summary p {
        font-size: 0.95em;
    }
}