/* ==========================================================================
   Kalpurush (Unicode Bangla) + Poppins (Latin)
   ========================================================================== */
@font-face {
    font-family: 'Kalpurush';
    src: url('../fonts/Kalpurush.woff2') format('woff2'),
         url('../fonts/Kalpurush.ttf') format('truetype');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
    unicode-range: U+0980-09FF, U+200C, U+200D;
}

body {
    font-family: 'Kalpurush', 'Poppins', sans-serif;
    text-rendering: optimizeLegibility;
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

body.lang-en {
    font-family: 'Poppins', 'Kalpurush', sans-serif;
}

.brand-logo { height: 40px; width: auto; display: block; object-fit: contain; }
.brand-logo-lg { height: 88px; width: auto; display: block; margin: 0 auto; object-fit: contain; }
.navbar-brand .brand-logo { height: 42px; }
.sidebar-brand .brand-logo { height: 44px; }

/* ==========================================================================
   Light & Dark Theme Variables
   ========================================================================== */
:root {
    /* Brand Colors */
    --primary-color: #4f46e5;
    --secondary-color: #9333ea;
}

/* Default Light Theme */
.light-theme {
    --bg-main: #f8fafc;
    --bg-alt: #f1f5f9;
    --text-main: #0f172a;
    --text-muted: #475569;
    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.05);
    --nav-bg-scrolled: rgba(255, 255, 255, 0.9);
    --nav-text: #334155;
    --nav-text-hover: #0f172a;
    --input-bg: #ffffff;
    --input-border: #cbd5e1;
    --hero-overlay: radial-gradient(circle at center, rgba(248, 250, 252, 0.3) 0%, rgba(248, 250, 252, 1) 90%);
}

/* Dark Theme */
.dark-theme {
    --bg-main: #0f172a;
    --bg-alt: #020617;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.05);
    --nav-bg-scrolled: rgba(15, 23, 42, 0.85);
    --nav-text: #cbd5e1;
    --nav-text-hover: #ffffff;
    --input-bg: rgba(255, 255, 255, 0.05);
    --input-border: rgba(255, 255, 255, 0.1);
    --hero-overlay: radial-gradient(circle at center, rgba(15, 23, 42, 0.5) 0%, rgba(15, 23, 42, 1) 90%);
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
}

.text-main {
    color: var(--text-main) !important;
}

.text-muted-custom {
    color: var(--text-muted) !important;
}

.section-bg {
    background-color: var(--bg-main) !important;
}

.section-bg-alt {
    background-color: var(--bg-alt) !important;
}

.footer-bg {
    background-color: var(--bg-alt);
    border-top: 1px solid var(--card-border);
}

/* ==========================================================================
   Typography & Utils
   ========================================================================== */
.text-primary-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-soft-primary {
    background-color: rgba(79, 70, 229, 0.1);
}

.py-6 {
    padding-top: 5rem;
    padding-bottom: 5rem;
}

/* ==========================================================================
   Navbar & Controls
   ========================================================================== */
.custom-navbar {
    padding: 1.2rem 0;
    transition: all 0.3s ease;
    background: transparent;
    z-index: 1030;
}

.custom-navbar.scrolled {
    background: var(--nav-bg-scrolled);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--card-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.nav-link {
    color: var(--nav-text) !important;
    font-weight: 500;
    font-size: 1.1rem;
    margin: 0 0.5rem;
    transition: color 0.3s ease;
}

body.lang-en .nav-link {
    font-size: 1rem; /* Adjust for english font */
}

.nav-link:hover, .nav-link.active {
    color: var(--nav-text-hover) !important;
}

.menu-icon {
    color: var(--text-main);
}

/* Toggles */
.theme-toggle-btn {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}
.theme-toggle-btn:hover {
    background: var(--primary-color);
    color: white;
}

.lang-toggle-btn {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: bold;
    border-radius: 20px;
    padding: 0.25rem 1rem;
    transition: all 0.3s ease;
}
.lang-toggle-btn:hover, .lang-toggle-btn.active-lang {
    background: var(--primary-color);
    color: white;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn-glow-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white !important;
    border: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

.btn-glow-primary:hover {
    box-shadow: 0 6px 25px rgba(79, 70, 229, 0.5);
    transform: translateY(-2px);
}

.btn-outline-custom {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
}
.btn-outline-custom:hover {
    background: var(--primary-color);
    color: white;
}

.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.hover-lift:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
    min-height: 100vh;
    padding-top: 80px; 
    overflow: hidden;
}

.hero-overlay {
    background: var(--hero-overlay);
    pointer-events: none;
    z-index: 0;
}

.badge-hero {
    background-color: var(--card-bg);
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

/* ==========================================================================
   Cards & Elements
   ========================================================================== */
.service-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.02);
}

.service-card:hover {
    border-color: rgba(79, 70, 229, 0.3);
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(79, 70, 229, 0.1);
}

.icon-box {
    width: 60px;
    height: 60px;
    background: rgba(79, 70, 229, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.bg-gradient-box {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.9), rgba(147, 51, 234, 0.9));
}

/* Steps */
.step-circle {
    width: 80px; 
    height: 80px; 
    border-radius: 50%;
    background: var(--card-bg);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}
.step-circle-active {
    background: var(--primary-color);
    color: white;
}
.step-line {
    border-top: 2px dashed var(--card-border); 
    width: 70%;
    z-index: 0;
}

/* ==========================================================================
   Forms & Inputs
   ========================================================================== */
.contact-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
}
.contact-info-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    transition: transform 0.3s ease;
}
.contact-info-item:hover {
    transform: translateX(10px);
    border-color: var(--primary-color);
}

.custom-input {
    background-color: var(--input-bg) !important;
    border: 1px solid var(--input-border) !important;
    color: var(--text-main) !important;
    padding: 0.8rem 1rem;
    border-radius: 8px;
}

.custom-input:focus {
    border-color: var(--primary-color) !important;
    box-shadow: 0 0 0 0.25rem rgba(79, 70, 229, 0.25) !important;
}

.custom-input::placeholder {
    color: #94a3b8;
}

/* ==========================================================================
   Accordion (FAQ)
   ========================================================================== */
.custom-accordion .accordion-item {
    border: 1px solid var(--card-border);
    background: var(--card-bg) !important;
}
.custom-accordion .accordion-button {
    background-color: var(--card-bg);
    color: var(--text-main);
    box-shadow: none;
}
.custom-accordion .accordion-button:not(.collapsed) {
    background-color: rgba(79, 70, 229, 0.05);
    color: var(--primary-color);
}
.custom-accordion .accordion-button:focus {
    box-shadow: none;
}
.dark-theme .custom-accordion .accordion-button::after {
    filter: invert(1);
}

/* ==========================================================================
   Modals
   ========================================================================== */
.custom-modal {
    background: var(--bg-main);
}
.dark-theme .custom-close {
    filter: invert(1);
}

/* ==========================================================================
   Social Icons
   ========================================================================== */
.social-icon {
    width: 45px;
    height: 45px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}
.social-icon:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

/* ==========================================================================
   Sidebar Collapse (Desktop)
   ========================================================================== */
@media (min-width: 992px) {
    .sidebar {
        transition: width 0.3s ease;
    }
    .main-content {
        transition: margin-left 0.3s ease;
    }
    
    .sidebar.collapsed {
        width: 80px !important;
    }
    .main-content.collapsed {
        margin-left: 80px !important;
    }
    
    /* Hide text when collapsed */
    .sidebar.collapsed .nav-link {
        font-size: 0;
        text-align: center;
        padding-left: 0 !important;
        padding-right: 0 !important;
    }
    .sidebar.collapsed .nav-link i {
        font-size: 1.25rem;
        margin-right: 0 !important;
    }
    
    .sidebar.collapsed .sidebar-brand h4 {
        font-size: 0;
    }
    .sidebar.collapsed .sidebar-brand h4::first-letter {
        font-size: 1.5rem;
    }
    
    .sidebar.collapsed .text-uppercase {
        display: none;
    }
    
    .sidebar.collapsed .nav-link.text-danger span {
        display: none;
    }
    .sidebar.collapsed .nav-link.text-danger i {
        margin-right: 0 !important;
    }
}