:root {
    --primary-color: #2563eb;
    --secondary-color: #475569;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --highlight-bg: #eff6ff;
    --chart-repayment: #94a3b8;
    --chart-interest: #3b82f6;
    --chart-balance: #ef4444;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--secondary-color);
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header.site-header {
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 15px;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
}

.header-logo-container {
    margin: 0;
}

.header-logo {
    height: 48px;
    width: auto;
    max-width: 100%;
    display: block;
}

.mobile-nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 1.2rem;
    color: var(--secondary-color);
    cursor: pointer;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    color: var(--secondary-color);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 6px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.nav-link:hover,
.nav-item.active .nav-link {
    color: var(--primary-color);
    background-color: var(--highlight-bg);
}

.nav-link .caret {
    font-size: 0.75rem;
    transition: transform 0.2s ease;
}

.nav-item:hover .caret {
    transform: rotate(180deg);
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 100;
    min-width: 240px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    padding: 8px;
    margin-top: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: 10px 12px;
    border-radius: 6px;
    text-decoration: none;
    color: #1e293b;
    transition: background 0.15s ease;
}

.dropdown-item:hover:not(.disabled) {
    background: var(--highlight-bg);
}

.dropdown-item.active {
    background: #eff6ff;
    border-left: 3px solid var(--primary-color);
}

.dropdown-item .item-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: #0f172a;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.dropdown-item .item-desc {
    font-size: 0.75rem;
    color: #64748b;
    margin-top: 2px;
}

.dropdown-item.disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.badge-soon {
    font-size: 0.65rem;
    font-weight: 700;
    background: #e2e8f0;
    color: #475569;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Mobile responsive navigation */
@media (max-width: 768px) {
    .mobile-nav-toggle {
        display: block;
    }

    .header-logo {
        height: 38px;
    }

    .site-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        margin-top: 15px;
    }

    .site-nav.nav-open {
        display: flex;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding: 0 0 0 15px;
        margin-top: 4px;
        background: transparent;
    }

    .nav-item:hover .caret {
        transform: none;
    }
}

.calculator-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.input-group {
    display: grid;
    grid-template-columns: 1fr 100px;
    gap: 10px;
    align-items: center;
}

.form-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.input-group .btn-calc {
    width: 100%;
    padding-left: 5px;
    padding-right: 5px;
    box-sizing: border-box;
    text-align: center;
}

input[type="number"],
input[type="text"].formatted-number {
    width: 100%;
    box-sizing: border-box;
    padding: 10px;
    padding-right: 45px; /* Make space for inner unit */
    border: 2px solid var(--primary-color);
    border-radius: 4px;
    font-size: 16px;
    outline: none;
    transition: box-shadow 0.2s, border-color 0.2s;
}

input[type="number"]:focus,
input[type="text"].formatted-number:focus {
    border-color: #1e40af;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
}

.input-wrapper {
    position: relative;
    flex: 1;
}

.unit {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-color);
    pointer-events: none;
    font-weight: 500;
}

.btn-calc {
    padding: 10px 15px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.btn-calc:hover { background-color: #334155; }
.btn-calc.btn-primary { background-color: var(--primary-color); }
.btn-calc.btn-primary:hover { background-color: #1d4ed8; }

.btn-secondary {
    padding: 10px 15px;
    background-color: #ef4444;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.btn-secondary:hover {
    background-color: #dc2626;
}

.radio-group, .checkbox-group {
    display: flex;
    gap: 20px;
    margin-bottom: 10px;
}

.result-area {
    margin-top: 30px;
    padding: 20px;
    background-color: var(--highlight-bg);
    border-radius: 4px;
    border-left: 5px solid var(--primary-color);
}

.big-number {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.highlight-result {
    background-color: #dcfce7;
    transition: background-color 0.5s;
}

.affiliate-box {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #cbd5e1;
}

.btn-affiliate {
    display: inline-block;
    background-color: #10b981;
    color: white;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
    margin-top: 10px;
}

/* History Navigation Styles */
.history-controls {
    display: none; /* activated by JS */
    align-items: center;
    gap: 10px;
}

.history-info {
    font-size: 14px;
    font-weight: 500;
    color: var(--secondary-color);
}

.history-controls .btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Custom Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 400px;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
    border-left: 5px solid var(--primary-color);
}

.modal-overlay.active .modal-card {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary-color);
    line-height: 1;
}

.modal-body {
    margin-bottom: 20px;
    line-height: 1.5;
}

.modal-footer {
    text-align: right;
}

/* Footer Styling */
.footer {
    background-color: #2d2d2d;
    color: #f1f5f9;
    padding: 30px 20px;
    border-radius: 8px;
    text-align: center;
    margin-top: 40px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.footer-links {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-links a {
    color: #f1f5f9;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-icons {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-icons a {
    color: #f1f5f9;
    font-size: 20px;
    transition: transform 0.2s, color 0.2s;
}

.footer-icons a:hover {
    color: var(--primary-color);
    transform: scale(1.15);
}

.footer p {
    margin: 0;
    font-size: 12px;
    color: #94a3b8;
}

@media (max-width: 600px) {
    .input-group { grid-template-columns: 1fr; }
    .form-grid-2 { grid-template-columns: 1fr; gap: 15px; }
    .unit { text-align: right; }
    .btn-calc { width: 100%; margin-top: 5px; }
}

/* Loading Spinner */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
}

/* Layout utility classes to avoid inline styles */
.chart-wrapper {
    margin-top: 30px;
}

.checkbox-group {
    display: flex;
    gap: 20px;
    align-items: center;
}

.checkbox-group label {
    margin: 0;
    font-weight: 500;
}

.margin-top-15 {
    margin-top: 15px;
}

.form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 25px;
}

.btn-pdf-export {
    margin-left: 10px;
}

/* Input Synchronization Status Helpers */
.input-sync-loading {
    background-color: #fff9db !important;
}

.input-sync-success {
    background-color: #f0fff4 !important;
    transition: background-color 0.5s ease;
}

.input-sync-error {
    background-color: #fff5f5 !important;
    transition: background-color 0.5s ease;
}

/* Layout Utilities to avoid inline styles */
.hidden-layout {
    display: none !important;
}

.visible-layout {
    display: block !important;
}

.calculator-disclaimer {
    margin-top: 25px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    font-size: 13px;
    color: var(--secondary-color);
    text-align: center;
    font-style: italic;
    opacity: 0.8;
}

/* ==========================================================================
   Welcome Page Styles (index.html)
   ========================================================================== */
.welcome-container {
    text-align: center;
    padding: 20px 10px;
}

.welcome-logo-container {
    margin: 0 auto 30px auto;
    display: flex;
    justify-content: center;
}

.welcome-logo {
    width: 100%;
    max-width: 280px;
    height: auto;
    display: block;
}

.welcome-heading {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 700;
}

.welcome-subheading {
    font-size: 1rem;
    color: var(--secondary-color);
    max-width: 600px;
    margin: 0 auto 30px auto;
    line-height: 1.5;
}

.welcome-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

.welcome-btn {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 25px 20px;
    background: var(--highlight-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease-in-out;
    flex: 1;
    max-width: 280px;
    box-sizing: border-box;
}

.welcome-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.welcome-btn i {
    font-size: 2.2rem;
    margin-bottom: 12px;
}

.welcome-btn strong {
    font-size: 1.1rem;
    display: block;
}

.welcome-btn .btn-desc {
    font-size: 12px;
    font-weight: normal;
    color: var(--secondary-color);
    margin-top: 8px;
    line-height: 1.4;
}

.welcome-btn:hover .btn-desc {
    color: rgba(255, 255, 255, 0.85);
}

@media (max-width: 600px) {
    .welcome-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    .welcome-btn {
        width: 100%;
        max-width: 100%;
    }
}

/* ==========================================================================
   Legal Content Styles (agb, datenschutz, impressum, kontakt)
   ========================================================================== */
.legal-content h2 {
    font-size: 1.4rem;
    color: #0f172a;
    font-weight: 700;
    margin-top: 25px;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 5px;
}

.legal-content h3 {
    font-size: 1.1rem;
    color: #334155;
    margin-top: 20px;
    margin-bottom: 8px;
    font-weight: 600;
}

.legal-content p {
    line-height: 1.6;
    margin-bottom: 15px;
}

.legal-content ol,
.legal-content ul {
    margin-bottom: 15px;
    padding-left: 20px;
}

.legal-content li {
    margin-bottom: 5px;
    line-height: 1.5;
}

.legal-content a {
    color: var(--primary-color, #2563eb);
    text-decoration: underline;
    cursor: pointer;
    transition: color 0.2s ease;
}

.legal-content a:hover {
    color: #1d4ed8;
}

hr {
    margin: 30px 0;
    border: 0;
    border-top: 1px solid var(--border-color);
}

/* ==========================================================================
   Fast Investment Calculator (Finanzgeflüster Aesthetic)
   ========================================================================== */
.fastcalc-card {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    padding: 35px;
    max-width: 820px;
    margin: 0 auto 40px auto;
    border: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    align-items: stretch !important;
    box-sizing: border-box;
}

.fastcalc-sliders {
    display: flex;
    flex-direction: column;
    align-items: stretch !important;
    gap: 24px;
    margin-bottom: 25px;
    width: 100% !important;
}

.fastcalc-group {
    display: flex;
    flex-direction: column;
    align-items: stretch !important;
    gap: 6px;
    width: 100% !important;
}

.fastcalc-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    font-size: 1.05rem;
    font-weight: 600;
    color: #1e293b;
    width: 100% !important;
}

.fastcalc-label-title {
    color: #334155;
}

.fastcalc-label-value {
    color: #0f172a;
    font-weight: 700;
}

.fastcalc-checkbox-row {
    display: flex;
    align-items: center;
    margin-top: -6px;
    margin-bottom: 6px;
}

.fastcalc-checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: #64748b;
    cursor: pointer;
    user-select: none;
}

.fastcalc-checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: #2563eb;
    cursor: pointer;
}

/* Finanzgeflüster-styled range sliders */
.fastcalc-slider {
    -webkit-appearance: none !important;
    appearance: none !important;
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    display: block !important;
    box-sizing: border-box !important;
    height: 8px !important;
    border-radius: 4px;
    background: #e2e8f0;
    outline: none;
    cursor: pointer;
    margin: 8px 0 16px 0 !important;
}

.fastcalc-slider::-webkit-slider-runnable-track {
    width: 100% !important;
    height: 8px !important;
    border-radius: 4px !important;
    background: transparent !important;
}

.fastcalc-slider::-moz-range-track {
    width: 100% !important;
    height: 8px !important;
    border-radius: 4px !important;
    background: transparent !important;
}

.fastcalc-slider::-webkit-slider-thumb {
    -webkit-appearance: none !important;
    appearance: none !important;
    width: 22px !important;
    height: 22px !important;
    border-radius: 50% !important;
    background: #ffffff !important;
    border: 3px solid #2563eb !important;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15) !important;
    cursor: pointer !important;
    margin-top: -7px !important; /* Center thumb vertically on 8px track */
    transition: transform 0.15s ease, border-color 0.15s ease !important;
}

.fastcalc-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #ffffff;
    border: 3px solid #2563eb;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.fastcalc-slider::-webkit-slider-thumb:hover {
    transform: scale(1.18);
    border-color: #1d4ed8;
}

.fastcalc-slider::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #ffffff;
    border: 3px solid #2563eb;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.fastcalc-divider {
    height: 1px;
    background: #e2e8f0;
    margin: 28px 0;
}

.fastcalc-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.fastcalc-summary-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.fastcalc-summary-label {
    font-size: 0.85rem;
    color: #64748b;
    font-weight: 500;
}

.fastcalc-summary-value {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.fastcalc-summary-value.text-dark {
    color: #1e293b;
}

.fastcalc-summary-value.text-success {
    color: #10b981;
}

.fastcalc-summary-value.text-accent {
    color: #2563eb;
}

.fastcalc-chart-box {
    margin-top: 20px;
    margin-bottom: 20px;
}

@media (max-width: 600px) {
    .fastcalc-card {
        padding: 20px;
    }
    .fastcalc-summary {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .fastcalc-summary-value {
        font-size: 1.25rem;
    }
/* SEO Article & FAQ High-Contrast Structured Layout */
.seo-article-section {
    margin-top: 45px;
    padding-top: 35px;
    border-top: 2px dashed #e2e8f0;
    text-align: left;
}

.seo-article-section h2 {
    font-size: 1.35rem;
    color: #0f172a !important;
    margin-top: 30px;
    margin-bottom: 18px;
    font-weight: 700;
    border-left: 4px solid var(--primary-color, #2563eb);
    padding: 8px 14px;
    background: #f8fafc;
    border-radius: 0 8px 8px 0;
}

.seo-article-section h3 {
    font-size: 1.1rem;
    color: #1e40af !important;
    margin-top: 24px;
    margin-bottom: 10px;
    font-weight: 600;
}

.seo-article-section p {
    font-size: 0.96rem;
    line-height: 1.7;
    color: #334155 !important;
    margin-bottom: 18px;
}

.faq-container {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    margin-bottom: 16px;
    background: #ffffff !important;
    padding: 18px 22px;
    border-radius: 10px;
    border: 1px solid #cbd5e1 !important;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
    transition: all 0.2s ease-in-out;
}

.faq-item:hover {
    border-color: #94a3b8 !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.faq-item h4,
.faq-item strong {
    display: flex;
    align-items: center;
    font-size: 1.02rem;
    color: #0f172a !important;
    margin-bottom: 10px;
    font-weight: 600;
}

.faq-item h4::before,
.faq-item strong::before {
    content: "FAQ";
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    color: #2563eb;
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    padding: 2px 8px;
    border-radius: 4px;
    margin-right: 10px;
    letter-spacing: 0.5px;
}

.faq-item p {
    font-size: 0.93rem;
    line-height: 1.6;
    color: #475569 !important;
    margin: 0;
    padding-left: 45px;
}

.calculator-disclaimer {
    font-size: 0.85rem;
    color: #64748b !important;
    font-style: italic;
    text-align: center;
    margin-top: 25px;
    margin-bottom: 25px;
    line-height: 1.5;
}

.seo-feature-box h2 {
    color: #0f172a !important;
    font-weight: 700 !important;
}

.seo-feature-box p {
    color: #334155 !important;
    font-size: 0.95rem !important;
    line-height: 1.6 !important;
}