/*
 * Learn Hindi Tuts - Custom Styles
 * Author: Bolt
 * Year: 2025
 */

/* --- CSS Variables for Theming --- */
@import url('https://fonts.googleapis.com/css2?family=VT323&display=swap');
@font-face {
  font-family: 'oLaila';
  src: url("../fonts/Laila/Medium.ttf") format('truetype');
  font-style: normal;
}
:root {
    /* Dark Theme Defaults */
    --primary: #2196F3; /* Professional Blue (Material Blue 500) - Used only for buttons/accents, NOT text/links */
    --secondary: #38bdf8; /* Light Blue (kept for secondary accents if needed) */
    --accent: #f472b6; /* Pink (kept for specific highlights) */
    --background: #171717; /* Dark Grey */
    --background-sec:#3E3E3E;
    --surface: #262626; /* Slightly Lighter Dark Grey */
    --text: #FFFFFF; 
    --text-primary: #FFFFFF;
    --outline-hover-text: #FFFFFF; 
    --text-secondary: #A3A3A3; /* Light Grey */
    --border: #2F2F2F;
    --success: #10b981; /* Not used for main branding, but for alerts */
    --warning: #f59e0b;
    --error: #ef4444;

    --header-bg: var(--surface);
    --footer-bg: var(--surface);
    --card-bg: var(--surface);
    --code-bg: #1e1e1e; /* Slightly different for code blocks */
    --ad-bg: #333; /* A neutral background for ads */
    --ad-text: var(--text-secondary);
    --black-bg-always : #000000bd; 
    --black-bg2-always : #1a1a1a; 
    --op-bg : #5B5555;

    --shadow-color: rgba(0, 0, 0, 0.2);
    --border-radius: 0.75rem; /* 12px for rounded */
    --font-family-sans-serif: "oLaila", serif; /* Using Inter as a modern sans-serif */
    --font-family-monospace: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;

    /* Spacing - Adjusted for a more compact, professional feel */
    --spacing-xs: 0.2rem;   /* 4px */
    --spacing-sm: 0.4rem;   /* 8px */
    --spacing-md: 0.6rem;   /* 12px */
    --spacing-lg: 1rem;     /* 16px */
    --spacing-xl: 1.5rem;   /* 24px */
    --spacing-xxl: 2rem;    /* 32px */

    /* Helper for RGB values for rgba() */
    --primary-rgb: 33, 150, 243; /* #2196F3 */
    --secondary-rgb: 56, 189, 248; /* #38bdf8 */
    --accent-rgb: 244, 114, 182; /* #f472b6 */
    --text-rgb: 255, 255, 255; /* RGB for #FFFFFF */
}

/* Light Theme Overrides */
[data-theme="light"] {
    --primary: #1976D2; /* Slightly darker primary for light mode (Material Blue 700) */
    --secondary: #03A9F4;
    --accent: #E91E63;
    --background: #F8F9FA; 
    --background-sec:#EBEBEB;
    --surface: #FFFFFF;
    --text: #212529; 
    --outline-hover-text: #FFFFFF; 
    --text-secondary: #6C757D;
    --text-primary: #212529;
    --border: #DEE2E6;
    --success: #28A745;
    --warning: #FFC107;
    --error: #DC3545;

    --header-bg: var(--surface);
    --footer-bg: var(--surface);
    --card-bg: var(--surface);
    --code-bg: #f0f0f0;
    --ad-bg: #e9ecef;
    --ad-text: var(--text-secondary);
    --op-bg : #D6D4D4;

    --shadow-color: rgba(0, 0, 0, 0.1);

    --primary-rgb: 25, 118, 210; /* #1976D2 */
    --secondary-rgb: 3, 169, 244; /* #03A9F4 */
    --accent-rgb: 233, 30, 99; /* #E91E63 */
    --text-rgb: 33, 37, 41; /* RGB for #212529 */
}

/* --- Base Styles --- */

body {
    font-family: var(--font-family-sans-serif);
    background-color: var(--background);
    color: var(--text);
    transition: background-color 0.3s ease, color 0.3s ease;

    /* later */
    letter-spacing: 0.6px;
    font-size: 1rem;
    word-spacing: .1em;
    line-height: 1.9;
}
h1, h2, h3, h4, h5, h6 {
    color: var(--text); 
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

h1 { font-size: 1.7rem; line-height: 1.2; } 
h2 { font-size: 1.4rem; line-height: 1.25; }
h3 { font-size: 1.2rem; line-height: 1.3; } 
h4 { font-size: 1.05rem; line-height: 1.35; } 
h5 { font-size: 0.95rem; line-height: 1.4; } 
h6 { font-size: 0.85rem; line-height: 1.45; } 
.table{--bs-table-bg: inherit;}
p{
    margin-bottom: var(--spacing-lg);
    line-height: 2;
    color: var(--text);
    font-size: 1rem;
}

.lead {
    font-size: 1rem;
    line-height: 1.6;
}
#a_d_modal{
    font-size: 0.9rem;
}
a {
    color: var(--text);
    text-decoration: none;
    transition: color 0.2s ease;
}
.main_content a{color: var(--primary);}

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

/* Full page layout adjustment: remove default container-fluid padding for main content */
.main-content-area > .container-fluid {
    padding-left: 0;
    padding-right: 0;
}
/* Apply padding to content within sections */
.section-padded {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
}
@media (min-width: 992px) {
    .section-padded {
        padding-left: var(--spacing-xxl);
        padding-right: var(--spacing-xxl);
    }
}


/* --- Utility Classes --- */
.primary-color{color : var(--primary)}
.text-primary-color { color: var(--text-primary) !important; } 
.text-primary-rev { color: var(--surface) !important; } 
.color-white { color: var(--outline-hover-text) !important; } 
.text-secondary-color { color: var(--text-secondary) !important; }
.bg-surface { background-color: var(--surface) !important; }
.bg-background { background-color: var(--background) !important; }
.background-secondary{background-color: var(--background-sec);}
.bg-primary{background-color: var(--primary) !important;}
.border-color { border-color: var(--border) !important; }
.rounded-lg { border-radius: var(--border-radius) !important; }
.shadow-sm-custom { box-shadow: 0 0.125rem 0.25rem var(--shadow-color) !important; }
.shadow-md-custom { box-shadow: 0 0.25rem 0.75rem var(--shadow-color) !important; }
.cursor-pointer {cursor: pointer;}
/* --- Header --- */
.navbar {
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border);
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.navbar-brand {
    font-weight: 800;
    font-size: 1.2rem; /* Adjusted from 1.3rem for smaller website name */
    color: var(--text) !important; /* Navbar brand now strictly uses text color */
    display: flex;
    align-items: center;
}
.navbar-brand:hover {
    color: var(--text-secondary) !important; /* Subtle grey on hover */
}
.navbar-nav .nav-link {
    color: var(--text); /* Nav links now strictly use text color */
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease, color 0.2s ease;
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--text-secondary); /* Subtle grey on hover/active */
    background-color: rgba(var(--text-rgb), 0.1); /* Subtle background highlight */
}
.navbar-toggler {
    border-color: var(--border);
}
.navbar-toggler-icon {
    /* Toggler icon now uses text color (white for dark, black for light) */
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23FFFFFF' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
[data-theme="light"] .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23212529' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
.navbar .dropdown-menu {
    border: 1px solid var(--border);
    background-color: var(--surface);
}
.navbar .dropdown-item {
    color: var(--text); /* Dropdown items now strictly use text color */
    transition: background-color 0.2s ease, color 0.2s ease;
}
.navbar .dropdown-item:hover {
    background-color: rgba(var(--text-rgb), 0.1); /* Subtle background highlight */
    color: var(--text-secondary); /* Subtle grey on hover */
}
.navbar-nav .nav-link.show {
    color: var(--text);
}

.search-bar .form-control {
    border-radius: var(--border-radius);
    background-color: var(--background);
    border: 1px solid var(--border);
    color: var(--text);
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.search-bar .form-control::placeholder {
    color: var(--text-secondary);
}
.search-bar .btn {
    border-radius: var(--border-radius);
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--text);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}
.search-bar .btn:hover {
    background-color: var(--secondary);
    border-color: var(--secondary);
}

/* Theme Toggle */
.theme-switch {
    display: flex;
    align-items: center;
    cursor: pointer;
    margin-left: var(--spacing-md);
}
.theme-switch .form-check-input {
    width: 2.5rem;
    height: 1.25rem;
    margin-right: var(--spacing-sm);
    background-color: var(--surface);
    border-color: var(--border);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.theme-switch .form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}
.theme-switch i {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* --- Main Content Layout --- */
.main-content-area {
    padding-top: var(--spacing-xxl);
    padding-bottom: var(--spacing-xxl);
}
.sidebar {
    background-color: var(--surface);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    border: 1px solid var(--border);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.sidebar h4 {
    color: var(--text); /* Strictly uses text color */
    margin-bottom: var(--spacing-md);
}
.sidebar .list-group-item {
    background-color: transparent;
    border: none;
    padding: var(--spacing-sm) 0;
    color: var(--text); /* Sidebar links now strictly use text color */
    transition: color 0.2s ease;
}
.sidebar .list-group-item:hover {
    color: var(--text-secondary); /* Subtle grey on hover */
}
.sidebar .list-group-item.active {
    color: var(--text-secondary); /* Subtle grey for active state */
    font-weight: 600;
}
.sidebar .list-group-item span.badge {
    background-color: rgba(var(--text-rgb), 0.1); /* Badge background uses text color rgba */
    color: var(--text); /* Badge text uses text color */
    font-weight: 500;
}

/* --- Cards & Sections --- */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
}
.card:hover {
    box-shadow: 0 0.5rem 1.5rem var(--shadow-color);
}
.card-title {
    color: var(--text); /* Strictly uses text color */
    font-weight: 600;
    font-size: 1.05rem; /* Adjusted from 1.15rem */
    margin-bottom: var(--spacing-sm);
}
.card-text {
    color: var(--text-secondary);
    font-size: 0.85rem; /* Adjusted from 0.9rem */
    line-height: 1.6;
}
.card-img-top {
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
    height: 140px;
    object-fit: cover;
}
.course-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-right: var(--spacing-md);
    border-radius: var(--border-radius);
    background-color: var(--background);
    padding: var(--spacing-sm);
    border: 1px solid var(--border);
}
.course-card-small {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    background-color: var(--card-bg);
    transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.course-card-small:hover {
    box-shadow: 0 0.25rem 0.75rem var(--shadow-color);
    border-color: var(--text-secondary); /* Subtle border highlight on hover */
}
.course-card-small .card-title {
    font-size: 0.95rem; /* Adjusted from 1.05rem */
    margin-bottom: var(--spacing-xs);
}
.course-card-small .text-text-secondary {
    font-size: 0.75rem; /* Adjusted from 0.8rem */
}


.section-title {
    font-size: 1.6rem; /* Adjusted from 1.8rem */
    font-weight: 700;
    color: var(--text); /* Section titles now strictly use text color */
    margin-bottom: var(--spacing-xxl);
    text-align: center;
}
.section-subtitle {
    font-size: 1rem; /* Adjusted from 1.1rem */
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

/* --- Buttons --- */
.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    color: var(--outline-hover-text) !important;
}
.btn-primary:hover {
    background-color: var(--secondary);
    border-color: var(--secondary);
    transform: translateY(-2px);
}
.btn-outline-primary {
    color: var(--primary) !important;
    border-color: var(--primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.btn-outline-primary:hover {
    background-color: var(--primary);
    color: var(--outline-hover-text) !important;
    transform: translateY(-2px);
}

/* --- Code Blocks --- */
pre {
    background-color: var(--code-bg);
    color: var(--text);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    overflow-x: auto;
    font-family: var(--font-family-monospace);
    font-size: 1rem; /* Adjusted from 0.85rem */
    line-height: 1.5;
    border: 1px solid var(--border);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
code {
    font-family: var(--font-family-monospace);
    color: var(--accent); /* Inline code can still use accent for distinction */
    background-color: rgba(var(--accent-rgb), 0.1);
    padding: 0.2em 0.4em;
    border-radius: 0.3rem;
}
pre code {
    /* color: var(--text); */
    background-color: transparent;
    padding: 0;
    border-radius: 0;
}
.op_content , pre.op, pre.op1
{
  padding: .5rem !important;
  overflow-x: auto !important;
  overflow-y: auto !important;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: 10px;
  background-color: var(--ad-bg) !important;
  color: var(--text) !important;
  border-left: 2px solid var(--text-secondary);
}
.error{color: var(--error);}
.op_top_bar{display: none;}
div.show_output{
  border-radius: 10px;
  background-color: var(--ad-bg) !important;
  color: var(--text-secondary) !important;
}

.code_toolbar{display: none;}
.code_toolbar button{font-size: 10px; border-radius: 8px !important; background: lightgray;}
.copy_code_btn, .copy_code_btn:active, .copy_code_btn:visited, .copy_code_btn:hover,
.code_fullscreen_btn, .code_fullscreen_btn:active, .code_fullscreen_btn:hover,
.code_fullscreen_close_btn , .code_fullscreen_close_btn:active, .code_fullscreen_close_btn:hover,
.run_script, .run_script:active, .run_script:hover,
.run_php, .run_php:active, .run_php:visited, .run_php:hover
.run_nodejs, .run_nodejs:active, .run_nodejs:visited, .run_nodejs:hover
{
  cursor: pointer;
  display: inline-block;
  border-radius: 0px;
  border-right: 1px solid gainsboro;
  margin: 0px !important;
}
.run_script, .html_js_jquery_btn, .run_python_btn, .code_container_header{display: none !important;}
.caption{color : var(--text-primary)}
/*for code color*/
.keywordColor{color : #66cdff;}
.restColor{color : #e7e3e3;}
.restColorImp{color : #e7e3e3 !important;}
.stringColor{color:#ffa100;}
.attrbuteColor{color : #49b390;}
.attributValuecolor{color:#c1a85d;}
.tagColor{color:#797d7f;}
.numberColor{color:#ccae37;}
.commentColor{color:#8c8d8d;}
.bg-light{background-color: #faf8f8;}
.bg-dark1{background-color: var(--black-bg-always)}
.bg-dark2{background-color: var(--black-bg2-always)}
.color-dl{color:var(--color-dl)}
.color-dl:hover{color: var(--color-dl-hover); text-decoration: none;}
.delimiter span{font-size: 30px;}
/* --- Footer --- */
.footer {
    background-color: var(--footer-bg);
    border-top: 1px solid var(--border);
    padding-top: var(--spacing-xxl);
    padding-bottom: var(--spacing-xxl);
    color: var(--text-secondary);
    transition: background-color 0.3s ease, border-color 0.3s ease;
    font-size: 15px;
}
.footer a {
    color: var(--text-secondary); /* Footer links now strictly use text color */
}
.footer a:hover {
    color: var(--text-primary); /* Subtle grey on hover */
}

.footer .btn {
    font-size: 0.9rem;
    padding: var(--spacing-sm) var(--spacing-md);
}

/* --- Breadcrumbs --- */
.breadcrumb {
    background-color: transparent;
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-lg);
    font-size: 14px;
}
.breadcrumb-item a {
    color: var(--text);
}
.breadcrumb-item.active {
    color: var(--text-secondary);
}

/* --- Article Content Styling (for blog/course detail) --- */
.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    display: block;
}
.article-content ul, .article-content ol {
    margin-left: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}
.article-content ul li, .article-content ol li {
    margin-bottom: var(--spacing-sm);
    color: var(--text);
    font-size: 0.9rem; /* Adjusted from 0.95rem */
}
.article-content table {
    width: 100%;
    margin-bottom: var(--spacing-lg);
    border-collapse: collapse;
    border-radius: var(--border-radius);
    overflow: hidden;
}
.article-content table th, .article-content table td {
    border: 1px solid var(--border);
    padding: var(--spacing-md);
    text-align: left;
    color: var(--text);
    font-size: 0.85rem; /* Adjusted from 0.9rem */
}
.article-content table th {
    background-color: var(--surface);
    font-weight: 600;
    color: var(--text); /* Table headers now strictly use text color */
}
.article-content table tr:nth-child(even) {
    background-color: rgba(var(--text-rgb), 0.05); /* Subtle row background */
}

.article-content{
    & b {font-size: .9rem;}
}

/* --- Comments Section --- */
.comments-section {
    margin-top: var(--spacing-xxl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border);
}
.comment-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}
.comment-author {
    font-weight: 600;
    color: var(--text); /* Strictly uses text color */
    font-size: 0.95rem; /* Adjusted from 1rem */
}
.comment-date {
    font-size: 0.75rem; /* Adjusted from 0.8rem */
    color: var(--text-secondary);
}
.comment-text {
    color: var(--text);
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: 0.85rem; /* Adjusted from 0.9rem */
}
.comment-reply-btn {
    font-size: 0.8rem; /* Adjusted from 0.85rem */
    color: var(--text); /* Reply button link now strictly uses text color */
    cursor: pointer;
}
.comment-reply-btn:hover {
    color: var(--text-secondary); /* Subtle grey on hover */
    text-decoration: underline;
}
.comment-replies {
    margin-left: var(--spacing-xl);
    border-left: 2px solid var(--border);
    padding-left: var(--spacing-lg);
    margin-top: var(--spacing-md);
}
.form-control {
    background-color: var(--background);
    border-color: var(--border);
    color: var(--text);
    font-size: 0.85rem; /* Adjusted from 0.9rem */
}
.form-control::placeholder {
    color: var(--text-secondary);
}
.btn-primary {
    margin-top: var(--spacing-md);
}
#comment_section {
  max-height: 450px;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 8px;
}

/* accordian */
.accordion{
  background-color: var(--surface);
  color: var(--text);
}

.accordion-item{
  background-color: var(--surface);
  color: var(--text);
}

.accordion-button{
  background-color: var(--surface);
  color: var(--text);
}

.accordion-button:not(.collapsed){
  background-color: var(--surface);
  color: var(--text);
}
.accordion-button::after{
  background-image:none; 
  content:"⌄";
  font-size:18px;
  color: var(--text);
  display:flex;
  align-items:center;
  justify-content:center;
}

.accordion-button:not(.collapsed)::after{
  transform:rotate(180deg);
}

/* --- Responsive Adjustments --- */
@media (max-width: 991.98px) {
    .navbar-collapse {
        background-color: var(--header-bg);
        border: 1px solid var(--border);
        padding: var(--spacing-md);
        margin-top: var(--spacing-sm);
        border-radius: var(--border-radius);
        max-height: 400px;
        overflow-y: auto;
    }
    .navbar-nav .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
        margin-bottom: var(--spacing-sm);
    }
    .theme-switch {
        margin-left: 0;
        margin-top: var(--spacing-md);
    }
    .section-title {
        font-size: 1.4rem; /* Adjusted from 1.6rem */
    }
    h1 { font-size: 1.5rem; } /* Adjusted from 1.6rem */
    h2 { font-size: 1.2rem; } /* Adjusted from 1.3rem */
    h3 { font-size: 1.05rem; } /* Adjusted from 1.15rem */
    p { font-size: 0.85rem; } /* Adjusted from 0.9rem */

    .footer .flex-grow-1 {
        flex-basis: 48% !important;
    }
}

@media (max-width: 767.98px) {
  .px-sm-zero {
    padding-left: 0 !important;
    padding-right: 0 !important;
  }
  
  .px-sm-small {
    padding-left: 5px !important;
    padding-right: 5px !important;
  }
}


/* override bootstrap classes */
label:not(.error){ color: var(--text-primary) !important; }
label.error{color:  #dc3545; font-size: 14px;}
.input_error{color: #dc3545 !important; font-size: 12px; line-height: 1.4;}
.input-group-text{
    background: var(--ad-bg);
    color: var(--ad-text);
    border: none;
    border-radius: 0px;
}
.feedback-note{
    line-height: 18px;
    font-size: 12px;
}
.fs-12{font-size: 12px;}