@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

/* --- Root Variables (Refined Color Palette) --- */
:root {
    --primary-color: #6366f1;    /* Modern Indigo */
    --secondary-color: #10b981;  /* Emerald Green */
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --light-text: #64748b;
    --header-bg: rgba(255, 255, 255, 0.9);
    --footer-bg: #0f172a;
    --border-color: #e2e8f0;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --code-bg: #1e1e1e;
}

/* --- Dark Mode Support --- */
body.dark-theme {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f1f5f9;
    --light-text: #94a3b8;
    --header-bg: rgba(30, 41, 59, 0.9);
    --border-color: #334155;
    --code-bg: #000000;
}

/* --- Reset & Global --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    transition: all 0.3s ease;
}

/* --- Layout Structure --- */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Header & Navigation --- */
.header {
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

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

.logo-img {
    height: 35px;
    display: block;
}

.nav {
    display: flex;
    gap: 25px;
}

.nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-actions button {
    background: var(--border-color);
    border: none;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
}

/* --- Main Content Area --- */
.main-content {
    min-height: 80vh; /* Khaalcha footer khali rahav mahanun */
    padding: 50px 0;
    width: 100%;
    max-width: 1100px; /* Container sarkhi width */
    margin: 0 auto;
}

h1 {
    font-size: clamp(1.8rem, 5vw, 2.5rem); /* Responsive font */
    color: var(--text-color);
    text-align: center;
    margin-bottom: 40px;
    font-weight: 700;
    line-height: 1.2;
}

h2 {
    font-size: 1.6rem;
    color: var(--primary-color);
    margin: 35px 0 15px;
}

h3 {
    font-size: 1.25rem;
    margin: 25px 0 10px;
}

p {
    margin-bottom: 20px;
    color: var(--light-text);
}

/* --- Java Code Block & Elements --- */
pre {
    background: var(--code-bg);
    color: #e2e8f0;
    padding: 20px;
    border-radius: 12px;
    overflow-x: auto;
    font-family: 'Consolas', monospace;
    font-size: 0.9rem;
    margin: 25px 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    border: 1px solid var(--border-color);
}

code {
    font-family: monospace;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    padding: 2px 6px;
    border-radius: 4px;
}

/* --- Tables --- */
.table-wrapper {
    overflow-x: auto; /* Mobile sathi table scroll */
    margin: 30px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--primary-color);
    color: white;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

/* --- Lists --- */
ul, ol {
    margin: 20px 0 20px 25px;
}

li {
    margin-bottom: 10px;
    padding-left: 5px;
}

/* --- Footer Styling (Center Aligned & Stacked) --- */
.footer {
    background: var(--footer-bg);
    color: #f8fafc;
    padding: 50px 0 30px;
    margin-top: 80px;
    width: 100%;
}

.footer-top {
    /* Grid ऐवजी Flex वापरून सगळं सेंटरला घेतलं आहे */
    display: flex;
    flex-direction: column; 
    align-items: center;    /* आडव्या बाजूने सेंटर */
    text-align: center;     /* मजकूर सेंटर */
    gap: 40px;              /* प्रत्येक कॉलममध्ये अंतर */
    margin-bottom: 40px;
}

.footer-col {
    width: 100%;
    max-width: 400px;       /* मजकूर जास्त पसरू नये म्हणून */
}

.footer-col h3, 
.footer-col h4 {
    color: #fff;
    margin-bottom: 15px;
    font-size: 1.4rem;
    position: relative;
    padding-bottom: 10px;
}

/* हेडलाईनच्या खाली छोटी बॉर्डर (Design साठी) */
.footer-col h3::after,
.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background: var(--primary-color);
}

.footer-col a {
    color: #94a3b8;
    text-decoration: none;
    display: block;         /* एका खाली एक दिसण्यासाठी */
    margin-bottom: 12px;
    transition: all 0.3s ease;
}

.footer-col a:hover {
    color: var(--primary-color);
    transform: translateY(-2px); /* थोडा वर सरकेल */
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid #1e293b;
    padding-top: 30px;
    color: #64748b;
    display: flex;
    flex-direction: column; /* कॉपीराइट मजकूर सुद्धा एका खाली एक */
    gap: 10px;
}

.footer-bottom small {
    word-break: break-all;  /* मोठी लिंक असेल तर कट होऊन खाली येईल */
    opacity: 0.7;
}

/* Mobile साठी सुटसुटीत पॅडिंग */
@media (max-width: 768px) {
    .footer {
        padding: 40px 20px;
    }
}
/* --- Responsive Menu (Mobile) --- */
@media (max-width: 768px) {
    #menu-btn { display: flex; }

    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--card-bg);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        border-bottom: 2px solid var(--primary-color);
    }

    .nav.active { display: flex; }

    .main-content {
        padding: 30px 15px;
    }
}