* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    min-height: 100vh;
    color: #e0e0e0;
}

/* NAV */
nav {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    padding: 15px 30px;
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav .logo {
    font-size: 1.2rem;
    font-weight: 800;
    background: linear-gradient(90deg, #00d2ff, #7b2ff7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-right: auto;
}

nav a {
    color: #cbd5e1;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
}

nav a:hover {
    color: #00d2ff;
}

/* CONTAINER */
.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

/* HEADER */
.page-header {
    text-align: center;
    padding: 40px 20px 20px;
}

.page-header h1 {
    font-size: 2.2rem;
    background: linear-gradient(90deg, #00d2ff, #7b2ff7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.page-header p {
    color: #9a9ab0;
    font-size: 1rem;
}

.year-badge {
    display: inline-block;
    background: linear-gradient(90deg, #7b2ff7, #00d2ff);
    color: white;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 10px;
}

/* CARD */
.card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 35px;
    margin-bottom: 25px;
}

.card h2 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: #e0e0e0;
}

/* FORM */
.form-group {
    margin-bottom: 22px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #b8b8d0;
    font-size: 0.95rem;
}

.form-group label .info {
    font-size: 0.8rem;
    color: #6a6a8a;
}

.input-wrapper {
    position: relative;
}

.input-wrapper input,
.input-wrapper select {
    width: 100%;
    padding: 15px 20px;
    padding-right: 50px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.3);
    color: white;
    font-size: 1.05rem;
    transition: border-color 0.3s;
    outline: none;
}

.input-wrapper input:focus,
.input-wrapper select:focus {
    border-color: #7b2ff7;
}

.input-wrapper .currency {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: #6a6a8a;
    font-weight: 600;
}

.input-wrapper select {
    padding-right: 20px;
    cursor: pointer;
}

.input-wrapper select option {
    background: #1a1a2e;
    color: white;
}

/* CHECKBOX */
.checkbox-group {
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    color: #b8b8d0;
}

.checkbox-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: #7b2ff7;
    cursor: pointer;
}

/* BUTTON */
.calc-btn {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 14px;
    background: linear-gradient(135deg, #7b2ff7, #00d2ff);
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 10px;
}

.calc-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(123, 47, 247, 0.5);
}

.calc-btn:active {
    transform: translateY(0);
}

/* TOGGLE */
.direction-toggle {
    display: flex;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    padding: 5px;
    margin-bottom: 30px;
}

.toggle-btn {
    flex: 1;
    padding: 14px;
    border: none;
    border-radius: 12px;
    background: transparent;
    color: #9a9ab0;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.toggle-btn.active {
    background: linear-gradient(135deg, #7b2ff7, #4a00e0);
    color: white;
    box-shadow: 0 4px 20px rgba(123, 47, 247, 0.4);
}

/* SONUÇ TABLOSU */
.result-card {
    display: none;
}

.result-card.show {
    display: block;
}

.result-header {
    text-align: center;
    margin-bottom: 25px;
}

.result-header h2 {
    font-size: 1.2rem;
    color: #b8b8d0;
    margin-bottom: 10px;
}

.result-amount {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(90deg, #00d2ff, #7b2ff7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.detail-table {
    width: 100%;
    border-collapse: collapse;
}

.detail-table tr {
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.detail-table tr:last-child {
    border-bottom: none;
}

.detail-table td {
    padding: 14px 5px;
}

.detail-table td:first-child {
    color: #9a9ab0;
}

.detail-table td:last-child {
    text-align: right;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.detail-table tr.highlight td {
    color: #00d2ff;
    font-weight: 700;
    font-size: 1.05rem;
}

.detail-table tr.total td {
    color: #7b2ff7;
    font-weight: 700;
    font-size: 1.1rem;
    border-top: 2px solid rgba(123, 47, 247, 0.3);
    padding-top: 18px;
}

.detail-table tr.negative td:last-child {
    color: #ff6b6b;
}

/* VERGİ DİLİMİ */
.tax-bracket {
    margin-top: 25px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 14px;
}

.tax-bracket h3 {
    color: #b8b8d0;
    margin-bottom: 12px;
    font-size: 1rem;
}

.bracket-bar {
    height: 10px;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.1);
    overflow: hidden;
    margin-bottom: 10px;
}

.bracket-fill {
    height: 100%;
    border-radius: 5px;
    background: linear-gradient(90deg, #00d2ff, #7b2ff7, #ff6b6b);
    transition: width 0.5s ease;
}

.bracket-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #6a6a8a;
}

/* SSS */
.faq-section h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-align: center;
}

.faq-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    margin-bottom: 12px;
    overflow: hidden;
}

.faq-question {
    padding: 18px 22px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.03);
}

.faq-question .arrow {
    transition: transform 0.3s;
}

.faq-item.open .faq-question .arrow {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding: 0 22px 18px;
    color: #9a9ab0;
    line-height: 1.7;
}

.faq-item.open .faq-answer {
    max-height: 300px;
}

/* BLOG İÇERİK */
.blog-content h2 {
    font-size: 1.4rem;
    margin: 30px 0 12px;
    color: #00d2ff;
}

.blog-content p {
    color: #9a9ab0;
    line-height: 1.8;
    margin-bottom: 15px;
}

.blog-content ul {
    color: #9a9ab0;
    padding-left: 20px;
    line-height: 2;
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.info-table th {
    background: rgba(123, 47, 247, 0.3);
    padding: 12px;
    text-align: left;
    font-size: 0.95rem;
}

.info-table td {
    padding: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    color: #9a9ab0;
}

.info-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* FOOTER */
footer {
    background: rgba(0, 0, 0, 0.4);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 40px 20px;
    text-align: center;
    color: #4a4a6a;
    font-size: 0.85rem;
    margin-top: 60px;
}

footer a {
    color: #7b2ff7;
    text-decoration: none;
    margin: 0 8px;
}

footer a:hover {
    color: #00d2ff;
}

/* RESPONSIVE */
@media (max-width: 600px) {
    .page-header h1 {
        font-size: 1.6rem;
    }

    .card {
        padding: 22px;
    }

    .result-amount {
        font-size: 2.2rem;
    }

    nav {
        gap: 15px;
        padding: 12px 20px;
    }

    nav .logo {
        font-size: 1rem;
    }
}