:root {
    --primary-color: #0052cc;
    --background-color: #f4f5f7;
    --card-background: #ffffff;
    --text-color: #172b4d;
    --text-light: #5e6c84;
    --border-color: #dfe1e6;
    --success-color: #00875a;
    --font-family: 'Inter', sans-serif;
    --header-height: 80px;
}

body.dark-mode {
    --primary-color: #4791ff;
    --background-color: #1d2125;
    --card-background: #282c34;
    --text-color: #d1d5db;
    --text-light: #9ca3af;
    --border-color: #4b5563;
    --success-color: #16a34a;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    padding-top: var(--header-height); /* Space for the fixed header */
}

.main-header {
    background-color: var(--card-background);
    padding: 0 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    transition: transform 0.3s ease-in-out;
}

.main-header.header--hidden {
    transform: translateY(-100%);
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem; 
}

.logo img {
    height: 40px; /* Controls the size of the logo */
}

.logo > span > span {
    color: var(--primary-color);
}

.main-nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.2s;
    white-space: nowrap;
}

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

.nav-link.active {
    color: var(--primary-color);
    font-weight: 600;
}

.nav-link.disabled {
    color: var(--border-color);
    cursor: not-allowed;
    pointer-events: none;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.hamburger-menu {
    display: none; /* Hidden on desktop */
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
}

.hamburger-menu .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-color);
    transition: all 0.3s ease-in-out;
}

.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100% - var(--header-height));
    background-color: var(--card-background);
    flex-direction: column;
    align-items: center;
    padding-top: 2rem;
    gap: 2rem;
    z-index: 99;
}

.mobile-nav.is-open {
    display: flex;
}

.main-content { padding: 2rem; max-width: 1200px; margin: 0 auto; }
.intro-text { text-align: center; margin-bottom: 2rem; }
.intro-text h1 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.intro-text p { font-size: 1.1rem; color: var(--text-light); max-width: 600px; margin: 0 auto; }

.calculator-container { display: flex; gap: 2rem; }
.input-column { flex: 1; max-width: 500px; }
.output-column { flex: 1.5; position: sticky; top: calc(var(--header-height) + 2rem); height: fit-content; }

.input-column-header { 
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion-section { background-color: var(--card-background); border: 1px solid var(--border-color); border-radius: 5px; margin-bottom: 1rem; overflow: hidden; }
.accordion-header { padding: 1rem; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.accordion-header h3 { font-size: 1.1rem; margin: 0; }
.accordion-content { padding: 0 1rem 1rem 1rem; }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-weight: 500; margin-bottom: 0.5rem; }
.form-group input, .form-group select, .form-group textarea { 
    width: 100%; 
    padding: 0.75rem; 
    border: 1px solid var(--border-color); 
    border-radius: 3px; 
    font-size: 1rem; 
    font-family: var(--font-family); 
    background-color: var(--card-background); 
    color: var(--text-color); 
}
.input-group { display: flex; gap: 0.5rem; }
.currency-group select { flex-basis: 100px; }
.form-group small { display: block; margin-top: 0.5rem; color: var(--text-light); font-size: 0.9rem; }
.suggested-value { color: var(--primary-color) !important; font-weight: 500; }

.results-card { background-color: var(--card-background); border: 1px solid var(--border-color); border-radius: 5px; padding: 1.5rem; margin-bottom: 1rem; }
.card-title { font-size: 1rem; color: var(--text-light); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 1rem; }
.main-result .price-display { font-size: 3.5rem; font-weight: 700; color: var(--success-color); line-height: 1; }
.main-result p { margin-top: 0.5rem; color: var(--text-light); }
.analysis-grid { display: grid; grid-template-columns: 1fr auto; gap: 0.5rem; font-size: 1.1rem; }
.analysis-value { font-weight: 600; text-align: right; }
.chart-container { position: relative; height: 250px; }

.main-footer { padding: 2rem; text-align: center; }
.newsletter-section { max-width: 500px; margin: 0 auto 2rem auto; padding: 2rem; background-color: var(--card-background); border: 1px solid var(--border-color); border-radius: 8px; }
.newsletter-section h3 { margin-bottom: 0.5rem; }
.newsletter-section p { color: var(--text-light); margin-bottom: 1.5rem; }
.newsletter-form { display: flex; gap: 0.5rem; }
.newsletter-form input { flex-grow: 1; padding: 0.75rem; border: 1px solid var(--border-color); border-radius: 3px; font-size: 1rem; background-color: var(--background-color); color: var(--text-color); }
.newsletter-form button { margin-top: 0; width: auto; }
.footer-links { margin-bottom: 1rem; }
.footer-links a { color: var(--text-light); text-decoration: none; margin: 0 0.5rem; }
.footer-links a:hover { color: var(--primary-color); }
.copyright { font-size: 0.9rem; color: var(--text-light); }

.mobile-sticky-bar { display: none; }

.btn { padding: 0.75rem 1.5rem; border: none; border-radius: 5px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: background-color 0.2s; }
.btn-primary { background-color: var(--primary-color); color: white; margin-top: 1rem; width: 100%; }
.btn-primary:hover { background-color: #0041a3; }
body.dark-mode .btn-primary:hover { background-color: #5c9eff; }
.btn-secondary { background-color: transparent; color: var(--text-light); border: 1px solid var(--border-color); }
.btn-secondary:hover { background-color: var(--background-color); }

.theme-switcher { display: flex; align-items: center; gap: 0.5rem; }
#dark-mode-toggle { appearance: none; width: 40px; height: 20px; background-color: #ccc; border-radius: 10px; position: relative; cursor: pointer; }
#dark-mode-toggle::before { content: ''; position: absolute; width: 16px; height: 16px; border-radius: 50%; background-color: white; top: 2px; left: 2px; transition: transform 0.3s; }
#dark-mode-toggle:checked { background-color: var(--primary-color); }
#dark-mode-toggle:checked::before { transform: translateX(20px); }

/* Share Modal Styles */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.6); display: flex; justify-content: center; align-items: center; z-index: 1000; }
.modal-content { background-color: var(--card-background); padding: 2rem; border-radius: 8px; width: 90%; max-width: 500px; position: relative; text-align: center; }
.close-btn { position: absolute; top: 10px; right: 15px; background: none; border: none; font-size: 2rem; color: var(--text-light); cursor: pointer; }
.modal-content h3 { margin-bottom: 0.5rem; }
.modal-content p { margin-bottom: 1.5rem; color: var(--text-light); }
.share-icons { display: flex; justify-content: center; gap: 1rem; margin-bottom: 1.5rem; }
.share-icon { display: flex; justify-content: center; align-items: center; width: 50px; height: 50px; border-radius: 50%; color: white; text-decoration: none; font-weight: bold; font-size: 1.2rem; }
.share-icon.facebook { background-color: #1877F2; }
.share-icon.twitter { background-color: #1DA1F2; }
.share-icon.linkedin { background-color: #0A66C2; }
.share-icon.reddit { background-color: #FF4500; }
.share-icon.whatsapp { background-color: #25D366; }
.share-icon.email { background-color: #7f8c8d; }
.copy-link-container { display: flex; }
#share-link-input { flex-grow: 1; padding: 0.5rem; border: 1px solid var(--border-color); border-radius: 3px 0 0 3px; background-color: var(--background-color); color: var(--text-color); }
#copy-link-btn { padding: 0.5rem 1rem; border: 1px solid var(--primary-color); background-color: var(--primary-color); color: white; border-radius: 0 3px 3px 0; cursor: pointer; }

.contact-form { text-align: left; }
.privacy-consent { display: flex; align-items: center; gap: 0.5rem; }
.privacy-consent input { width: auto; }

@media (max-width: 1100px) {
    .main-nav { display: none; }
    .hamburger-menu { display: block; }
    .header-right {
        justify-content: flex-end;
        flex-grow: 1;
    }
}

@media (max-width: 992px) {
    .calculator-container { flex-direction: column; }
    .input-column { max-width: 100%; }
    .output-column { position: static; }
}

@media (max-width: 768px) {
    /* --- General Mobile Layout --- */
    body { 
        padding-top: 60px; 
        --header-height: 60px;
        padding-bottom: 80px; 
    }
    .main-content { 
        padding: 1rem; 
    }

    /* --- Header Fixes --- */
    .main-header { 
        height: var(--header-height); 
        padding: 0 1rem; 
    }
    .logo { 
        font-size: 1.5rem; 
        flex-shrink: 1; 
        gap: 0.5rem; 
    }
    .logo img { 
        height: 32px; 
    }
    .header-right { 
        gap: 1rem; 
    }

    .theme-switcher label {
        display: none; 
    }

    /* --- Main Title Fixes --- */
    .intro-text h1 {
        font-size: 1.8rem; 
        margin-top: 0;     
    }

    /* --- Mobile Input Fix (Prevents Zoom) --- */
    .form-group input, .form-group select {
        font-size: 16px; 
    }

    /* --- Other Mobile Adjustments --- */
    .newsletter-form { 
        flex-direction: column; 
    }
    .newsletter-form button { 
        width: 100%; 
    }
    .mobile-sticky-bar { 
        display: flex; 
        position: fixed; 
        bottom: 0; 
        left: 0; 
        right: 0; 
        background-color: var(--card-background); 
        border-top: 1px solid var(--border-color); 
        padding: 0.75rem; 
        justify-content: space-around; 
        box-shadow: 0 -2px 10px rgba(0,0,0,0.1); 
        z-index: 90;
    }
    .sticky-item { 
        text-align: center; 
    }
    .sticky-item.main { 
        font-weight: 700; 
    }
    .sticky-label { 
        font-size: 0.8rem; 
        color: var(--text-light); 
    }
    .sticky-value { 
        font-size: 1.2rem; 
    }
    .sticky-item.main .sticky-value { 
        color: var(--success-color); 
        font-size: 1.4rem; 
    }
}

/* --- Privacy Modal Styles (Added in Update 40) --- */
.privacy-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

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

.privacy-modal {
    background-color: var(--card-background);
    color: var(--text-color);
    width: 90%;
    max-width: 500px;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    display: flex;
    flex-direction: column;
    max-height: 90vh;
    border: 1px solid var(--border-color);
}

.privacy-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.privacy-header h3 { margin: 0; font-size: 1.2rem; }

.privacy-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

.privacy-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.privacy-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.privacy-option:last-child { border-bottom: none; margin-bottom: 0; }

.option-text h4 { margin: 0 0 0.25rem 0; font-size: 1rem; }
.option-text p { margin: 0; font-size: 0.85rem; color: var(--text-light); }

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
    flex-shrink: 0;
}

.toggle-switch input { opacity: 0; width: 0; height: 0; }

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider { background-color: var(--success-color); }
input:disabled + .slider { background-color: var(--border-color); cursor: not-allowed; opacity: 0.6; }
input:checked + .slider:before { transform: translateX(26px); }

.privacy-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

@media (max-width: 480px) {
    .privacy-footer { flex-direction: column; }
    .privacy-footer button { width: 100%; }
}