@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* Global CSS Variables */
:root {
    /* Colors */
    --primary-color: #0559CF;
    --primary-light: #A8CCFF;
    --primary-dark: #084aa7;
    --secondary-color: #0B81CA;
    --text-color: #333;
    --text-light: #666;
    --text-lighter: #999;
    --light-bg: #f0f8ff;
    --white: #fff;
    --black: #000;
    --danger: #dc3545;
    --danger-light: #ffecec;
    --gray-100: #f8f9fa;
    --gray-200: #f5f7fa;
    --gray-300: #e1e5eb;
    
    /* Shadows */
    --shadow-light: 0 3px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 5px 15px rgba(0, 0, 0, 0.15);
    --shadow-dark: 0 0 30px rgba(0, 0, 0, 0.2);
    --shadow-primary: 0 5px 15px rgba(5, 89, 207, 0.3);
    --shadow-menu: -5px 0 20px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: all 0.3s ease;
    --transition-medium: all 0.4s ease;
    --transition-slow: all 0.5s ease;
    
    /* Border Radius */
    --border-radius-sm: 5px;
    --border-radius-md: 10px;
    --border-radius-lg: 15px;
    --border-radius-xl: 20px;
    --border-radius-special: 0 10px;
    --border-radius-circle: 50%;
    
    /* Z-index Layers */
    --z-navbar: 200;
    --z-menu: 300;
    --z-popup: 250;
    --z-back-to-top: 99;
    --z-preloader: 9999;
}

/* Reset & Base Styles */
* {
    padding: 0;
    margin: 0;
    font-family: 'Poppins', sans-serif;
    scroll-behavior: smooth;
    box-sizing: border-box;
}

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

img {
    object-fit: cover;
    max-width: 100%;
    height: auto;
}

/* Navbar Styles */
nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    position: fixed;
    width: 100%;
    top: 0;
    background-color: var(--white);
    z-index: var(--z-navbar);
    height: 70px;
    transition: var(--transition-medium);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

nav.scrolled {
    height: 60px;
    box-shadow: var(--shadow-light);
}

/* Enhanced Logo Styling */
nav .nav-logo {
    position: relative;
    overflow: hidden;
    padding: 5px;
    border-radius: var(--border-radius-md);
}

nav .nav-logo img {
    width: 160px;
    cursor: pointer;
    transition: var(--transition-medium);
    transform-origin: center;
}

nav .nav-logo:hover img {
    transform: rotate(5deg) scale(1.08);
    filter: drop-shadow(0 5px 10px rgba(5, 89, 207, 0.4));
}

/* Navigation Links Styling */
nav .nav-links {
    display: flex;
    align-items: center;
    margin-right: 30px;
    gap: 8px;
    position: relative;
    z-index: calc(var(--z-navbar) + 10);
}

nav .nav-links a {
    font-size: 16px;
    margin-left: 20px;
    position: relative;
    font-weight: 500;
    padding: 5px 8px;
    border-radius: var(--border-radius-sm);
}

nav .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition-medium);
    border-radius: 2px;
}

nav .nav-links a:hover::after,
nav .nav-links a.active::after {
    width: 100%;
}

nav .nav-links a:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

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

/* Login Button Styling */
nav .nav-login {
    position: relative;
    z-index: calc(var(--z-navbar) + 10);
}

nav .nav-login a {
    padding: 8px 16px;
    cursor: pointer;
    border: 2px solid var(--primary-color);
    background-color: var(--white);
    border-radius: var(--border-radius-md);
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    box-shadow: 0 2px 8px rgba(5, 89, 207, 0.15);
}

nav .nav-login a i {
    margin-right: 8px;
    transition: var(--transition-fast);
}

nav .nav-login a:hover {
    color: var(--white);
    background-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-primary);
}

nav .nav-login a:hover i {
    transform: rotate(360deg);
}

/* Mobile Menu Icon */
nav .navbar-menu,
nav .menu-icon {
    display: none;
}

nav .menu-icon {
    font-size: 25px;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    z-index: calc(var(--z-navbar) + 10);
    color: var(--text-color);
    padding: 5px;
    border-radius: var(--border-radius-sm);
}

nav .menu-icon:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

/* Mobile Menu */
nav .navbar-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100%;
    background: var(--white);
    color: var(--text-color);
    transition: var(--transition-medium);
    padding: 20px;
    z-index: var(--z-menu);
    border-left: 1px solid rgba(0, 0, 0, 0.08);
    overflow-y: auto;
}

nav .navbar-menu.active {
    right: 0;
    box-shadow: var(--shadow-menu);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: 20px;
}

.mobile-menu-header .logo img {
    width: 130px;
    transition: var(--transition-fast);
}

.mobile-menu-header .logo img:hover {
    transform: scale(1.05);
}

nav .navbar-menu .close-btn {
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition-fast);
    color: var(--text-color);
    padding: 5px;
    border-radius: var(--border-radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    min-height: 40px;
}

nav .navbar-menu .close-btn:hover {
    color: var(--primary-color);
    background-color: var(--gray-100);
    transform: rotate(90deg);
}

nav .navbar-menu ul {
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding: 0;
    margin: 20px 0;
}

nav .navbar-menu ul li {
    list-style: none;
}

nav .navbar-menu ul li a {
    font-size: 16px;
    color: var(--text-color);
    padding: 8px 12px;
    display: flex;
    align-items: center;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

nav .navbar-menu ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

nav .navbar-menu ul li a:hover::after,
nav .navbar-menu ul li a.active::after {
    width: 100%;
}

nav .navbar-menu ul li a:hover {
    color: var(--primary-color);
    background-color: var(--gray-100);
    transform: translateX(5px);
}

nav .navbar-menu ul li a.active {
    color: var(--primary-color);
    font-weight: 600;
}

nav .navbar-menu ul li a i {
    margin-right: 10px;
    font-size: 15px;
    transition: var(--transition-fast);
    width: 20px;
    text-align: center;
}

nav .navbar-menu ul li a:hover i {
    transform: translateX(-3px);
}

/* Mobile Login Button */
nav .navbar-menu .nav-login {
    padding: 10px;
    font-size: 15px;
    color: var(--primary-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 25px;
    background-color: var(--white);
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius-md);
    transition: var(--transition-fast);
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(5, 89, 207, 0.15);
}

nav .navbar-menu .nav-login:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(5, 89, 207, 0.3);
}

nav .navbar-menu .nav-login i {
    margin-right: 10px;
    transition: var(--transition-fast);
}

nav .navbar-menu .nav-login:hover i {
    transform: rotate(360deg);
}

/* Responsive Design */
@media screen and (max-width: 1200px) {
    nav .nav-links a {
        margin-left: 15px;
        font-size: 14px;
    }
    
    nav .nav-login a {
        padding: 8px 15px;
        font-size: 14px;
    }
}

@media screen and (max-width: 990px) {
    nav .nav-links,
    nav .nav-login {
        display: none;
    }
    
    nav .menu-icon {
        display: block;
    }
    
    nav .navbar-menu {
        display: block;
    }
    
    nav {
        padding: 0 20px;
        height: 60px;
    }
    
    nav.scrolled {
        height: 55px;
    }
}

@media screen and (max-width: 768px) {
    nav {
        padding: 0 15px;
        height: 55px;
    }
    
    nav.scrolled {
        height: 50px;
    }
    
    nav .nav-logo img {
        width: 130px;
    }
}

@media screen and (max-width: 576px) {
    nav {
        padding: 0 15px;
        height: 50px;
    }
    
    nav.scrolled {
        height: 45px;
    }
    
    nav .nav-logo img {
        width: 120px;
    }
    
    nav .menu-icon {
        font-size: 22px;
    }
    
    nav .navbar-menu {
        width: 280px;
        padding: 15px;
    }
    
    .mobile-menu-header {
        padding-bottom: 12px;
        margin-bottom: 15px;
    }
    
    nav .navbar-menu ul {
        gap: 12px;
        margin: 15px 0;
    }
    
    nav .navbar-menu ul li a {
        font-size: 15px;
        padding: 8px 12px;
    }
    
    nav .navbar-menu .nav-login {
        padding: 10px;
        font-size: 14px;
        margin-top: 20px;
    }
}

@media screen and (max-width: 400px) {
    nav {
        padding: 0 10px;
        height: 45px;
    }
    
    nav.scrolled {
        height: 40px;
    }
    
    nav .nav-logo img {
        width: 100px;
    }
    
    nav .menu-icon {
        font-size: 20px;
    }
    
    nav .navbar-menu {
        width: 250px;
        padding: 12px;
    }
    
    .mobile-menu-header {
        padding-bottom: 10px;
        margin-bottom: 12px;
    }
    
    nav .navbar-menu ul li a {
        font-size: 14px;
        padding: 6px 10px;
    }
    
    nav .navbar-menu .nav-login {
        padding: 8px;
        font-size: 13px;
        margin-top: 15px;
    }
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: var(--border-radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: var(--z-back-to-top);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-medium);
    font-size: 18px;
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
    animation: bounceIn 0.6s ease;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-5px);
    box-shadow: var(--shadow-primary);
}

/* Preloader */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: var(--z-preloader);
    transition: var(--transition-slow);
}

.preloader.fade-out {
    opacity: 0;
    visibility: hidden;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--light-bg);
    border-top: 4px solid var(--primary-color);
    border-radius: var(--border-radius-circle);
    animation: spin 1s linear infinite;
    margin-bottom: 15px;
}

.preloader-text {
    color: var(--primary-color);
    font-size: 16px;
    font-weight: 600;
    animation: pulse 1.5s ease-in-out infinite;
    text-align: center;
    padding: 0 20px;
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.1); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); opacity: 1; }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Custom Scrollbar */
nav .navbar-menu::-webkit-scrollbar {
    width: 5px;
}

nav .navbar-menu::-webkit-scrollbar-track {
    background: var(--gray-100);
}

nav .navbar-menu::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

nav .navbar-menu::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Touch Optimization */
@media (hover: none) and (pointer: coarse) {
    nav .nav-links a,
    nav .nav-login a,
    nav .navbar-menu ul li a,
    nav .menu-icon,
    nav .navbar-menu .close-btn {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    nav .nav-links a,
    nav .navbar-menu ul li a {
        justify-content: flex-start;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    nav .nav-logo img,
    .mobile-menu-header .logo img {
        image-rendering: -webkit-optimize-contrast;
    }
}