/* ===== VARIABLES ===== */
:root {
    --primary: #0066cc;
    --primary-dark: #0052a3;
    --secondary: #1a1a1a;
    --accent: #ff6b35;
    --light: #f8f9fa;
    --gray: #666666;
    --dark: #333333;
    --success: #28a745;
    --sidebar-bg: #0f172a;
    --sidebar-text: #e2e8f0;
    --transition: all 0.3s ease;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    line-height: 1.6;
    color: var(--dark);
    background-color: white;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

h1, h2, h3, h4 {
    color: var(--secondary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

h1 {
    font-size: 3.2rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

h2:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary);
}

h3 {
    font-size: 1.8rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--gray);
    line-height: 1.7;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,102,204,0.2);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

/* ===== HEADER & NAVIGATION ===== */
header {
    background: white;
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #f0f0f0;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    color: var(--secondary);
}

.logo i {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 20px;
}

.nav-links a {
    text-decoration: none;
    color: var(--secondary);
    font-weight: 500;
    transition: var(--transition);
    font-size: 0.95rem;
    position: relative;
    padding: 5px 0;
}

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

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

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

.mobile-menu {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary);
}

/* ===== SCROLL PROGRESS ===== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--primary);
    z-index: 1001;
    transition: var(--transition);
}

/* ===== FOOTER ===== */
footer {
    background: var(--secondary);
    color: white;
    padding: 60px 0 25px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: var(--transition);
    font-size: 1.2rem;
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 25px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
}

/* ===== BACK TO TOP ===== */
.back-to-top {
    position: fixed;
    bottom: 25px;
    right: 25px;
    width: 55px;
    height: 55px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 100;
    box-shadow: 0 4px 15px rgba(0,102,204,0.3);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,102,204,0.4);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
        padding: 15px 0;
    }
    
    .nav-links {
        flex-direction: column;
        width: 100%;
        margin-top: 20px;
        display: none;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links li {
        margin: 10px 0;
    }
    
    .mobile-menu {
        display: block;
        position: absolute;
        top: 20px;
        right: 20px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
        text-align: center;
        align-items: center;
    }
    
    h1 {
        font-size: 2.3rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    section {
        padding: 60px 0;
    }
}
/* ===== UPDATED FOOTER STYLES ===== */
.footer-text h3 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.footer-text p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: var(--transition);
    padding: 8px;
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.social-links a img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: brightness(0) invert(1);
}