/* ==========================================
   MAIN.CSS - SHARED GLOBAL STYLES
   ========================================== */

/* CSS VARIABLES FOR THEMING */
:root {
    --primary: #0066FF;
    --primary-dark: #0052CC;
    --accent: #00D4AA;
    --success: #22C55E;
    --warning: #F59E0B;
    --error: #EF4444;
    
    /* Light theme colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #F1F5F9;
    --text-primary: #1E293B;
    --text-secondary: #475569;
    --text-tertiary: #94A3B8;
    --border-color: #E2E8F0;
    --card-bg: #FFFFFF;
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --overlay-bg: rgba(255, 255, 255, 0.95);
}

/* Dark theme colors */
[data-theme="dark"] {
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-tertiary: #64748B;
    --border-color: #334155;
    --card-bg: #1E293B;
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --overlay-bg: rgba(15, 23, 42, 0.95);
}

/* GLOBAL RESET */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: all 0.3s ease;
    overflow-x: hidden;
    padding-top: 76px;
}

body::before {
    content: '';
    display: block;
    height: 76px;
    margin-top: -76px;
    visibility: hidden;
    pointer-events: none;
}

/* NEURAL NETWORK BACKGROUND */
.neural-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.15;
    pointer-events: none;
}

/* PRELOADER */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

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

.preloader-content {
    text-align: center;
}

.preloader-logo {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { 
        opacity: 0.8;
        transform: scale(1);
    }
    50% { 
        opacity: 1;
        transform: scale(1.05);
    }
}

.preloader-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.loading-dots {
    display: flex;
    justify-content: center;
    gap: 5px;
}

.loading-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    animation: loadingDots 1.5s infinite;
}

.loading-dot:nth-child(2) { animation-delay: 0.2s; }
.loading-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes loadingDots {
    0%, 60%, 100% {
        opacity: 0.3;
        transform: scale(1);
    }
    30% {
        opacity: 1;
        transform: scale(1.3);
    }
}

/* NAVIGATION - STANDARDIZED ACROSS ALL PAGES */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0;
    background: var(--overlay-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

#navbar.scrolled {
    box-shadow: 0 2px 20px var(--card-shadow);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
}

.logo svg {
    width: 45px;
    height: 45px;
    transition: transform 0.3s ease;
}

.nav-brand:hover .logo svg {
    transform: rotate(-10deg) scale(1.1);
}

.logo-text {
    font-family: 'Poppins', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.nav-center {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color 0.3s ease;
    padding: 5px 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.3s ease;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.theme-toggle {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.2rem;
}

.theme-toggle:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px) rotate(180deg);
    box-shadow: 0 5px 15px rgba(0, 102, 255, 0.3);
}

.theme-toggle:hover #themeIcon {
    color: white;
}

.nav-cta {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 102, 255, 0.3);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 0.95rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 102, 255, 0.3);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.btn-white {
    background: white;
    color: var(--primary);
    padding: 15px 35px;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

.btn-outline-white {
    background: transparent;
    color: white;
    padding: 15px 35px;
    border: 2px solid white;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* FOOTER - STANDARDIZED ACROSS ALL PAGES */
footer {
    padding: 80px 30px 30px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-brand {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
}

.footer-logo svg {
    width: 40px;
    height: 40px;
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 30px;
}

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

.social-link {
    width: 45px;
    height: 45px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link svg {
    transition: transform 0.3s ease;
}

.social-link:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 102, 255, 0.3);
}

.social-link:hover svg {
    transform: scale(1.1);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 15px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary);
    transform: translateX(5px);
    display: inline-block;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.footer-copyright {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    gap: 30px;
}

.footer-legal a {
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-legal a:hover {
    color: var(--primary);
}

/* RESPONSIVE BREAKPOINTS */
@media (max-width: 1200px) {
    .nav-container {
        padding: 20px;
    }
    
    .footer-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-center {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--overlay-bg);
        flex-direction: column;
        padding: 20px;
        border-top: 1px solid var(--border-color);
        backdrop-filter: blur(20px);
    }
    
    .nav-center.active {
        display: flex;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav-actions {
        gap: 15px;
    }
    
    .nav-cta {
        padding: 10px 20px;
        font-size: 0.85rem;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-legal {
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 15px 20px;
    }
    
    .logo-text {
        font-size: 1.4rem;
    }
    
    footer {
        padding: 60px 20px 20px;
    }
}

/* UTILITY CLASSES */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none !important; }
.visible { display: block !important; }

.fade-in {
    opacity: 0;
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.6s ease forwards;
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}