/* CSS Reset & Variables */
:root {
    /* Default Light Mode */
    --bg-color: #f4f6f9;
    --card-bg: #ffffff;
    --text-color: #333333;
    --primary-color: #d35400;
    --secondary-color: #2c3e50;
    --accent-color: #c0392b;
    --success-color: #27ae60;
    --border-color: #ddd;
    --header-bg: #fff;
    --footer-bg: #ecf0f1;
    --input-bg: #f9f9f9;
    --heading-color: #2c3e50;
    --subtext-color: #666;
}

[data-theme="dark"] {
    /* Dark Mode Overrides */
    --bg-color: #1a1a1a;
    --card-bg: #2d2d2d;
    --text-color: #e0e0e0;
    --primary-color: #f39c12;
    /* Industrial Orange */
    --secondary-color: #34495e;
    /* Steel Blue */
    --accent-color: #e74c3c;
    /* Alert Red */
    --success-color: #2ecc71;
    --border-color: #444;
    --header-bg: #111;
    --footer-bg: #111;
    --input-bg: #222;
    --heading-color: #fff;
    --subtext-color: #bbb;
}

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

body {
    font-family: 'Hind', 'Roboto', sans-serif;
    /* Clean Font for Hindi/English */
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    /* Improved readability */
    transition: background-color 0.3s, color 0.3s;
}

p {
    margin-bottom: 15px;
}

ul,
ol {
    margin-left: 20px;
    margin-bottom: 20px;
}

li {
    margin-bottom: 8px;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s;
}

a:hover {
    color: var(--text-color);
}

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

/* Pre-footer Banner */
.pre-footer-banner {
    width: 100%;
    max-width: 1200px;
    margin: 40px auto;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.pre-footer-banner img {
    width: 100%;
    height: auto;
    display: block;
}

/* Header Logo Image */
.logo img {
    max-height: 40px;
    width: auto;
}

/* Header */
.main-header {
    background-color: var(--header-bg);
    padding: 20px 0;
    border-bottom: 2px solid var(--primary-color);
    transition: background-color 0.3s;
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-header h1 {
    font-size: 1.5rem;
    color: var(--heading-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo a {
    color: var(--heading-color);
}

.main-header nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
    align-items: center;
}

.main-header nav a {
    color: var(--text-color);
    font-weight: 500;
}

.main-header nav a:hover {
    color: var(--primary-color);
}

/* Dropdown Menu */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropbtn {
    cursor: pointer;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-bg);
    display: flex;
    align-items: center;
    gap: 5px;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--card-bg);
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.dropdown-content a {
    color: var(--text-color);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    border-bottom: 1px solid var(--border-color);
}

.dropdown-content a:last-child {
    border-bottom: none;
}

.dropdown-content a:hover {
    background-color: var(--input-bg);
    color: var(--primary-color);
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown:hover .dropbtn {
    background-color: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 12px;
    border-radius: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s;
}

.theme-toggle-btn:hover {
    background-color: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

/* Main Content */
.main-content {
    padding: 40px 0;
    min-height: 80vh;
}

/* Hero Section */
.hero-section {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    margin-bottom: 50px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.tool-card {
    background-color: var(--card-bg);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s, background-color 0.3s;
    text-align: center;
    border: 1px solid var(--border-color);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.tool-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.tool-card h3 {
    margin-bottom: 10px;
    color: var(--heading-color);
}

.tool-card p {
    font-size: 0.9rem;
    color: var(--subtext-color);
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 4px;
    font-weight: bold;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #d35400;
    color: #fff;
}

/* Slider Section */
.slider-block {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    transition: background-color 0.3s;
}

.slider-block h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
}

.slide-content {
    font-size: 1.2rem;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
}

/* Content Sections */
.content-section {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    margin-bottom: 30px;
    border-left: 5px solid var(--primary-color);
    transition: background-color 0.3s;
}

.content-section h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.content-section h3 {
    margin-top: 20px;
    margin-bottom: 10px;
    color: var(--heading-color);
}

.formula-box {
    background-color: var(--input-bg);
    padding: 15px;
    border-radius: 4px;
    font-family: monospace;
    margin: 10px 0;
    border: 1px solid var(--border-color);
    color: var(--success-color);
}

/* FAQ Section */
.faq-section {
    margin-top: 50px;
}

.faq-item {
    background-color: var(--card-bg);
    margin-bottom: 10px;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.faq-question {
    padding: 15px 20px;
    background-color: var(--input-bg);
    cursor: pointer;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-color);
}

.faq-question:hover {
    background-color: var(--border-color);
}

.faq-answer {
    padding: 20px;
    display: none;
    border-top: 1px solid var(--border-color);
    color: var(--text-color);
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

/* Calculators */
.calculator-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-color);
    font-size: 1rem;
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--card-bg);
}

/* Results */
.result-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    border: 2px solid var(--primary-color);
    margin-bottom: 30px;
    position: relative;
    max-width: 800px;
    margin: 0 auto 30px;
    color: var(--text-color);
}

.result-header {
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.result-value {
    font-size: 2.5rem;
    color: var(--primary-color);
    font-weight: bold;
    text-align: center;
    margin: 20px 0;
}

.result-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 20px;
    background-color: var(--input-bg);
    padding: 15px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.result-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
    flex-wrap: wrap;
}

.qr-code-box {
    text-align: center;
    margin-top: 20px;
    padding: 10px;
    background: #fff;
    display: inline-block;
    border: 1px solid #ddd;
}

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

.footer-links {
    margin-top: 20px;
}

.footer-links a {
    margin: 0 10px;
    color: var(--subtext-color);
}

/* SEO Examples Section */
.seo-examples {
    font-size: 0.9em;
    line-height: 1.6;
    color: var(--subtext-color);
    max-height: 300px;
    overflow-y: auto;
    background: var(--bg-color);
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

/* Utility Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
    text-align: left;
}

.table th,
.table td {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: var(--input-bg);
    color: var(--heading-color);
}

hr.dashed {
    border: none;
    border-top: 1px dashed var(--border-color);
    margin: 15px 0;
}

/* Responsive */
@media (max-width: 768px) {
    .main-header .container {
        flex-direction: column;
        gap: 15px;
    }

    .main-header nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-section {
        grid-template-columns: 1fr;
    }

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

    .result-details {
        grid-template-columns: 1fr;
    }
}

/* Scroll Back to Top Button */
#scrollToTopBtn {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 100;
    border: none;
    outline: none;
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
    padding: 15px;
    border-radius: 50%;
    font-size: 18px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    transition: all 0.3s;
    width: 60px;
    height: 60px;
    align-items: center;
    justify-content: center;
}

#scrollToTopBtn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-5px);
}

#scrollToTopBtn.visible {
    display: flex;
}