/* FILE: assets/css/style.css */
/* DESCRIPTION: Main Global Style Sheet for SK Software Teach Pvt. Ltd. */
/* DESIGN SYSTEM: Modern SaaS, Glassmorphism, Dark Mode Support, Modern Typography */

:root {
    /* Theme Palette */
    --primary-color: #6C4DF6;
    --primary-hover: #583AD6;
    --secondary-color: #00C2FF;
    --secondary-hover: #00A3D9;
    --dark-bg: #08111F;
    --card-bg: #101B2D;
    --card-hover: #16243D;
    --text-white: #FFFFFF;
    --text-muted: #8E9BAE;
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(16, 27, 45, 0.65);
    --glass-border: rgba(255, 255, 255, 0.12);
    --gradient-primary: linear-gradient(135deg, #6C4DF6 0%, #00C2FF 100%);
    --gradient-dark: linear-gradient(180deg, #08111F 0%, #0B1628 100%);
    
    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Transitions & Shadows */
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --box-shadow-glow: 0 10px 30px -10px rgba(108, 77, 246, 0.35);
    --box-shadow-card: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: var(--font-body);
    background-color: var(--dark-bg);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4, h5, h6, .font-heading {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
}

a {
    transition: var(--transition-fast);
    text-decoration: none;
}

/* --- Preloader --- */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--dark-bg);
    z-index: 99999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader {
    text-align: center;
}

.loader-circle {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(108, 77, 246, 0.15);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px auto;
}

.loader-text {
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: 2px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
    font-size: 0.85rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* --- Utility Classes --- */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

.glass-navbar {
    background: rgba(8, 17, 31, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.card-custom {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.card-custom:hover {
    transform: translateY(-8px);
    background: var(--card-hover);
    border-color: rgba(108, 77, 246, 0.4);
    box-shadow: var(--box-shadow-glow);
}

/* --- Buttons --- */
.btn-primary {
    background: var(--gradient-primary);
    border: none;
    color: var(--text-white);
    font-weight: 600;
    padding: 12px 28px;
    transition: var(--transition-smooth);
}

.btn-primary:hover {
    background: var(--gradient-primary);
    filter: brightness(1.15);
    box-shadow: var(--box-shadow-glow);
    transform: translateY(-2px);
}

.btn-icon {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-white);
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.btn-icon:hover {
    background: rgba(108, 77, 246, 0.2);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* --- Header & Navigation --- */
.header-main {
    z-index: 1030;
    transition: var(--transition-smooth);
}

.navbar-brand .brand-logo {
    max-height: 42px;
}

.navbar-brand .brand-text {
    font-size: 1.4rem;
}

.nav-link {
    color: rgba(255, 255, 255, 0.75);
    padding: 10px 16px !important;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

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

.mega-menu-dropdown .mega-menu {
    width: 680px;
    padding: 24px;
    margin-top: 15px;
    border: 1px solid var(--glass-border);
}

.mega-title {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.mega-list a {
    color: var(--text-muted);
    display: block;
    padding: 6px 0;
    font-size: 0.9rem;
}

.mega-list a:hover {
    color: var(--secondary-color);
    padding-left: 6px;
}

.mega-promo {
    background: linear-gradient(135deg, rgba(108, 77, 246, 0.3) 0%, rgba(0, C2, 255, 0.15) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Custom Hamburger Icon */
.custom-toggler {
    border: none;
    padding: 0;
    width: 30px;
    height: 20px;
    position: relative;
    box-shadow: none !important;
}

.custom-toggler .toggler-icon {
    display: block;
    position: absolute;
    height: 2px;
    width: 100%;
    background: var(--text-white);
    border-radius: 2px;
    opacity: 1;
    left: 0;
    transform: rotate(0deg);
    transition: 0.25s ease-in-out;
}

.custom-toggler .top-bar { top: 0px; }
.custom-toggler .middle-bar { top: 9px; }
.custom-toggler .bottom-bar { top: 18px; }

.custom-toggler[aria-expanded="true"] .top-bar {
    top: 9px;
    transform: rotate(135deg);
}

.custom-toggler[aria-expanded="true"] .middle-bar {
    opacity: 0;
    left: -20px;
}

.custom-toggler[aria-expanded="true"] .bottom-bar {
    top: 9px;
    transform: rotate(-135deg);
}

/* --- Footer --- */
.footer-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

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

.social-btn {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    border-radius: 50%;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.social-btn:hover {
    background: var(--primary-color);
    color: var(--text-white);
    transform: translateY(-3px);
}

/* Back to Top & Floating WhatsApp */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    z-index: 990;
    display: none;
    align-items: center;
    justify-content: center;
}

.whatsapp-float {
    position: fixed;
    bottom: 85px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: #25D366;
    z-index: 990;
}

.whatsapp-float:hover {
    background-color: #20BA5A;
}

/* Custom Form Styles */
.glass-input-group {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
}

.glass-input-group input:focus {
    box-shadow: none;
    background: rgba(255, 255, 255, 0.08);
}