/* ========================================
   Kredi Kartı Faiz Hesaplama - Styles
   Modern, Premium Design
======================================== */

/* Import Google Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* CSS Variables */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --warning-gradient: linear-gradient(135deg, #f2994a 0%, #f2c94c 100%);
    --danger-gradient: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);

    --bg-dark: #0a0a1a;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);

    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background Animation */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(118, 75, 162, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(240, 147, 251, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    padding: 30px 0;
    text-align: center;
    position: relative;
}

.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.logo {
    font-size: 2rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 2.5rem;
}

.header-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
}

/* Ad Container */
.ad-container {
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    margin: 20px 0;
    text-align: center;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-container-horizontal {
    min-height: 90px;
}

.ad-container-vertical {
    min-height: 250px;
}

.ad-placeholder {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Main Content */
.main-content {
    padding: 40px 0;
}

/* Tab Navigation */
.tab-navigation {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
    justify-content: center;
}

.tab-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 14px 24px;
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 10px;
    backdrop-filter: blur(10px);
}

.tab-btn:hover {
    background: var(--bg-card-hover);
    border-color: rgba(102, 126, 234, 0.3);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-glow);
}

.tab-btn-icon {
    font-size: 1.2rem;
}

/* Calculator Cards */
.calculator-section {
    display: none;
    animation: fadeIn 0.4s ease;
}

.calculator-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.calculator-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    text-align: center;
    margin-bottom: 40px;
}

.card-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card-description {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Form Layout */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.form-group {
    position: relative;
}

.form-label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 10px;
}

.form-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all var(--transition-normal);
    font-family: inherit;
}

.form-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
    background: rgba(255, 255, 255, 0.08);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.input-suffix {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(30%);
    color: var(--text-muted);
    font-size: 0.9rem;
    pointer-events: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: inherit;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow), var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: rgba(102, 126, 234, 0.3);
}

.btn-group {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Results */
.results-container {
    display: none;
    margin-top: 40px;
    animation: slideUp 0.5s ease;
}

.results-container.show {
    display: block;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.result-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 25px;
    text-align: center;
    transition: all var(--transition-normal);
}

.result-card:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.result-card.highlight {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-color: rgba(102, 126, 234, 0.3);
}

.result-card.warning {
    background: linear-gradient(135deg, rgba(242, 153, 74, 0.1), rgba(242, 201, 76, 0.1));
    border-color: rgba(242, 153, 74, 0.3);
}

.result-card.danger {
    background: linear-gradient(135deg, rgba(235, 51, 73, 0.1), rgba(244, 92, 67, 0.1));
    border-color: rgba(235, 51, 73, 0.3);
}

.result-card.success {
    background: linear-gradient(135deg, rgba(17, 153, 142, 0.1), rgba(56, 239, 125, 0.1));
    border-color: rgba(56, 239, 125, 0.3);
}

.result-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.result-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.result-value.gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.result-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* Payment Schedule Table */
.schedule-container {
    margin-top: 30px;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.schedule-header {
    background: var(--bg-card);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.schedule-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.schedule-toggle {
    background: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.schedule-toggle:hover {
    color: var(--text-primary);
    border-color: rgba(102, 126, 234, 0.3);
}

.schedule-table-wrapper {
    max-height: 400px;
    overflow-y: auto;
    display: none;
}

.schedule-table-wrapper.show {
    display: block;
}

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

.schedule-table th,
.schedule-table td {
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.schedule-table th {
    background: rgba(102, 126, 234, 0.1);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
}

.schedule-table td {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.schedule-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

/* Multiple Cards Section */
.cards-list {
    margin-bottom: 30px;
}

.card-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 15px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr auto;
    gap: 15px;
    align-items: end;
    animation: fadeIn 0.3s ease;
}

.card-item .form-group {
    margin: 0;
}

.card-item .form-label {
    margin-bottom: 8px;
}

.btn-remove {
    background: rgba(235, 51, 73, 0.1);
    border: 1px solid rgba(235, 51, 73, 0.3);
    color: #f45c43;
    padding: 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-remove:hover {
    background: rgba(235, 51, 73, 0.2);
}

.btn-add-card {
    width: 100%;
    background: transparent;
    border: 2px dashed var(--border-color);
    color: var(--text-secondary);
    padding: 20px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1rem;
    margin-bottom: 30px;
}

.btn-add-card:hover {
    border-color: rgba(102, 126, 234, 0.5);
    color: var(--text-primary);
    background: rgba(102, 126, 234, 0.05);
}

/* Info Box */
.info-box {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-top: 30px;
}

.info-box-title {
    font-weight: 600;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-box-content {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.info-box-content ul {
    margin-top: 10px;
    padding-left: 20px;
}

.info-box-content li {
    margin-bottom: 5px;
}

/* FAQ Section */
.faq-section {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.faq-title {
    text-align: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 40px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-card-hover);
}

.faq-icon {
    font-size: 1.2rem;
    transition: transform var(--transition-normal);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-normal);
    color: var(--text-secondary);
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    padding: 0 20px 20px;
    max-height: 500px;
}

/* Footer */
.footer {
    margin-top: 60px;
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links {
    margin-top: 15px;
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--text-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        padding: 20px 0;
    }

    .logo {
        font-size: 1.5rem;
    }

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

    .header-subtitle {
        font-size: 0.95rem;
    }

    .tab-btn {
        padding: 12px 18px;
        font-size: 0.85rem;
    }

    .tab-btn-icon {
        display: none;
    }

    .calculator-card {
        padding: 25px;
    }

    .card-title {
        font-size: 1.4rem;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .card-item {
        grid-template-columns: 1fr;
    }

    .results-grid {
        grid-template-columns: 1fr 1fr;
    }

    .result-value {
        font-size: 1.4rem;
    }

    .faq-grid {
        grid-template-columns: 1fr;
    }

    .schedule-table th,
    .schedule-table td {
        padding: 10px 12px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .tab-navigation {
        gap: 8px;
    }

    .tab-btn {
        padding: 10px 14px;
        font-size: 0.8rem;
        flex: 1;
        min-width: 120px;
        justify-content: center;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .btn {
        width: 100%;
    }

    .btn-group {
        flex-direction: column;
    }
}

/* Bank Select Styles */
.bank-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.bank-select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.bank-select option {
    background: #1a1a2e;
    color: var(--text-primary);
    padding: 10px;
}

/* Rate Info Box */
.rate-info {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: fadeIn 0.3s ease;
}

.rate-info-icon {
    font-size: 1.2rem;
}

.rate-info-text {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Rate input when auto-filled */
.rate-input.auto-filled {
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.3);
}

.rate-input:read-only {
    cursor: not-allowed;
    opacity: 0.8;
}