/* --- style.css --- */

/* 1. Google Fonts Import (Isse fonts sabhi pages par work karenge) */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Poppins:wght@300;400;500;600;700&display=swap');

:root {
    /* Light Theme Variables */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #f8fafc;
    --accent-color: #3b82f6;
    --background-color: #f8f9fa;
    --surface-color: #ffffff;
    --text-main: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --hover-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --gradient-hero: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
}

[data-theme="dark"] {
    /* Dark Theme Variables */
    --primary-color: #3b82f6;
    --primary-dark: #60a5fa;
    --secondary-color: #1e293b;
    --accent-color: #60a5fa;
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --text-main: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --hover-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

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

body {
    font-family: 'Outfit', 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

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

h1, h2, h3 { color: var(--text-main); font-weight: 700; line-height: 1.2; }
h2 { text-align: center; font-size: 2.2rem; margin-bottom: 15px; }
.section-desc { text-align: center; color: var(--text-secondary); max-width: 600px; margin: 0 auto 50px auto; font-size: 1.1rem; }

a { text-decoration: none; color: inherit; transition: all 0.2s ease; }
ul { list-style: none; }

/* --- HEADER & NAV --- */
.header {
    background-color: rgba(var(--surface-color), 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0; 
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--surface-color);
}
.navbar { display: flex; justify-content: space-between; align-items: center; }

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo span { color: var(--primary-color); }
.logo svg { width: 30px; height: 30px; } 

.nav-group { display: flex; align-items: center; gap: 30px; }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a {
    color: var(--text-main); font-weight: 500; font-size: 1rem; position: relative;
}
.nav-links a:hover { color: var(--primary-color); }

/* Theme Toggle Button */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-main);
    transition: all 0.3s ease;
}
.theme-toggle:hover { background-color: var(--border-color); }
.theme-toggle svg { width: 18px; height: 18px; }

.hamburger-menu { display: none; cursor: pointer; flex-direction: column; gap: 6px; z-index: 1001; }
.hamburger-menu .bar { width: 25px; height: 2.5px; background-color: var(--text-main); border-radius: 5px; transition: all 0.3s ease; }

/* --- HERO SECTION --- */
.hero { 
    padding: 70px 0 30px 0; 
    background: var(--gradient-hero); 
    text-align: center;
    position: relative;
}
.hero-content { max-width: 800px; margin: 0 auto; }

.badge {
    display: inline-block;
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero h1 { font-size: 3.5rem; margin-bottom: 20px; letter-spacing: -1px; }
.hero h1 span { 
    background: linear-gradient(to right, var(--primary-color), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero .subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

/* Search Bar */
.search-container {
    position: relative;
    max-width: 500px;
    margin: 0 auto 30px auto;
}
.search-input {
    width: 100%;
    padding: 18px 25px 18px 55px;
    border-radius: 50px;
    border: 2px solid var(--border-color);
    background-color: var(--surface-color);
    font-size: 1.1rem;
    color: var(--text-main);
    outline: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}
.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.15);
}
.search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

.cta-button {
    display: inline-flex; align-items: center; justify-content: center;
    background-color: var(--primary-color); 
    color: #ffffff; 
    padding: 16px 32px; 
    font-size: 1.1rem; 
    font-weight: 600; 
    border-radius: 12px; 
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
    transition: all 0.3s ease;
}
.cta-button:hover { 
    background-color: var(--primary-dark); 
    transform: translateY(-2px); 
    box-shadow: 0 15px 30px rgba(37, 99, 235, 0.4); 
}

/* --- CATEGORIES --- */
.calculator-section { padding: 30px 0 80px 0; }

.category-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); 
    gap: 25px; 
}

.category-card { 
    background: var(--surface-color); 
    border: 1px solid var(--border-color); 
    border-radius: 16px; 
    padding: 30px; 
    text-align: center; 
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
}
.category-card:hover { 
    transform: translateY(-5px); 
    box-shadow: var(--hover-shadow); 
    border-color: var(--primary-color);
}

.card-icon { 
    width: 70px; 
    height: 70px; 
    background-color: rgba(37, 99, 235, 0.08); 
    border-radius: 50%; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    margin-bottom: 20px;
    color: var(--primary-color);
    transition: background-color 0.3s ease;
}
.category-card:hover .card-icon {
    background-color: var(--primary-color);
    color: white;
}

.card-icon svg { width: 35px; height: 35px; }
.category-card h3 { font-size: 1.25rem; margin-bottom: 10px; }
.category-card p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 20px; flex-grow: 1; }

.card-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 5px;
}
.category-card:hover .card-link { gap: 10px; }

/* --- FEATURES / WHY CHOOSE US --- */
.features-section { background-color: var(--surface-color); padding: 80px 0; border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; text-align: center; }
.feature-item h3 { margin: 15px 0 10px; font-size: 1.3rem; }
.feature-item p { color: var(--text-secondary); }
.feature-icon { font-size: 2.5rem; color: var(--accent-color); margin-bottom: 15px; }

/* --- FAQ SECTION --- */
.faq-section { padding: 60px 0 20px 0; max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--surface-color); border: 1px solid var(--border-color); border-radius: 12px; margin-bottom: 15px; overflow: hidden; }
.faq-question { padding: 20px; cursor: pointer; font-weight: 600; display: flex; justify-content: space-between; align-items: center; color: var(--text-main); }
.faq-question::after { content: '+'; font-size: 1.5rem; color: var(--primary-color); }
.faq-item.active .faq-question::after { content: '-'; }
.faq-answer { padding: 0 20px 20px; display: none; color: var(--text-secondary); }
.faq-item.active .faq-answer { display: block; animation: fadeIn 0.3s ease; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* --- ABOUT SECTION --- */
.about-section { padding: 20px 0 60px 0; text-align: center; }

/* --- FOOTER --- */
.footer { padding: 60px 0 30px 0; background-color: var(--surface-color); border-top: 1px solid var(--border-color); }
.footer-content { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 40px; margin-bottom: 40px; }
.footer-brand { max-width: 350px; }
.footer-brand p { color: var(--text-secondary); margin-top: 15px; font-size: 0.95rem; }
.footer-col h4 { margin-bottom: 20px; font-size: 1.1rem; color: var(--text-main); }
.footer-col ul li { margin-bottom: 12px; }
.footer-col a { color: var(--text-secondary); font-size: 0.95rem; }
.footer-col a:hover { color: var(--primary-color); }

/* COPYRIGHT CENTER ALIGNMENT */
.copyright-text { 
    text-align: center; 
    border-top: 1px solid var(--border-color); 
    padding-top: 30px; 
    color: var(--text-secondary); 
    font-size: 0.9rem;
    width: 100%;
    display: block;
}

/* --- RESPONSIVE --- */
@media (max-width: 992px) {
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .hero h1 { font-size: 2.8rem; }
    .features-grid { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 768px) {
    .navbar { position: relative; }
    .nav-group { gap: 15px; }
    .hamburger-menu { display: flex; }

    /* TITLE SIZE REDUCTION FOR MOBILE */
    .logo { font-size: 1.3rem; }
    .logo svg { width: 24px; height: 24px; }
    
    .nav-links {
        position: absolute; top: 100%; left: 0; right: 0; 
        flex-direction: column; background-color: var(--surface-color); 
        padding: 0; max-height: 0; overflow: hidden; 
        transition: max-height 0.4s ease;
        border-bottom: none;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    }
    .nav-links.active { max-height: 400px; padding: 20px 0; }
    .nav-links li { width: 100%; text-align: center; padding: 10px 0; }
    
    .hero h1 { font-size: 2.2rem; }
    .category-grid { grid-template-columns: 1fr; }
    
    .footer-content { flex-direction: column; text-align: center; }
    .footer-brand { margin: 0 auto; }
    
    .footer-brand .logo {
        justify-content: center;
        margin-bottom: 10px;
    }
}