/* ============================================
   DEUTSCH MASTER - PREMIUM DESIGN SYSTEM
   ============================================ */

:root {
    /* Colors */
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #3B82F6;
    --secondary: #7C3AED;
    --secondary-dark: #6D28D9;
    --accent: #06B6D4;
    --dark: #0F172A;
    --dark-2: #1E293B;
    --dark-3: #334155;
    --light: #FFFFFF;
    --gray: #94A3B8;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    
    /* Glassmorphism */
    --glass-bg: rgba(15, 23, 42, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --glass-blur: blur(20px);
    
    /* Neumorphism */
    --neo-shadow: 8px 8px 16px rgba(0, 0, 0, 0.3),
                  -8px -8px 16px rgba(255, 255, 255, 0.05);
    --neo-shadow-inset: inset 4px 4px 8px rgba(0, 0, 0, 0.3),
                        inset -4px -4px 8px rgba(255, 255, 255, 0.05);
    
    /* Animations */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 50%;
}

/* Light Mode */
[data-theme="light"] {
    --dark: #F8FAFC;
    --dark-2: #F1F5F9;
    --dark-3: #E2E8F0;
    --light: #0F172A;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--dark);
    color: var(--light);
    overflow-x: hidden;
    transition: background var(--transition-smooth), color var(--transition-smooth);
}

/* Particle Background */
#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* Preloader */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s, visibility 0.5s;
}

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

.loader {
    text-align: center;
}

.loader-circle {
    width: 60px;
    height: 60px;
    border: 3px solid transparent;
    border-top-color: var(--primary);
    border-right-color: var(--secondary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

.loader-text {
    font-size: 1.2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

/* Glass Navigation */
.glass-nav {
    background: var(--glass-bg) !important;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    padding: 15px 0;
    transition: all var(--transition-smooth);
}

.glass-nav.scrolled {
    padding: 10px 0;
    background: rgba(15, 23, 42, 0.95) !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--light) !important;
    display: flex;
    align-items: center;
}

.brand-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.nav-link {
    color: var(--gray) !important;
    font-weight: 500;
    padding: 8px 16px !important;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--light) !important;
    background: rgba(255, 255, 255, 0.05);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-smooth);
}

.nav-link:hover::after {
    width: 60%;
}

/* User Menu */
.user-avatar {
    width: 35px;
    height: 35px;
    border-radius: var(--radius-full);
    border: 2px solid var(--primary);
    object-fit: cover;
}

.user-xp {
    font-size: 0.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-left: 8px;
}

.glass-dropdown {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    padding: 8px 0;
}

.glass-dropdown .dropdown-item {
    color: var(--light);
    padding: 10px 20px;
    transition: all var(--transition-fast);
}

.glass-dropdown .dropdown-item:hover {
    background: rgba(37, 99, 235, 0.2);
    color: var(--primary-light);
}

/* Buttons */
.btn {
    font-weight: 600;
    border-radius: var(--radius-md);
    padding: 10px 24px;
    transition: all var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.4);
}

.btn-glow {
    position: relative;
}

.btn-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-glow:hover::before {
    left: 100%;
}

.glass-btn {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    color: var(--light);
}

.glass-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--light);
}

.btn-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

/* Hero Section */
.hero-section {
    position: relative;
    z-index: 1;
    padding-top: 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--light);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradient-shift 3s ease infinite;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    display: block;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray);
    margin-top: 4px;
}

.star-rating {
    color: var(--warning);
    font-size: 0.875rem;
}

/* Hero Visual */
.hero-visual {
    position: relative;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.float-card {
    position: absolute;
    padding: 15px 25px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    animation: float 6s ease-in-out infinite;
}

.float-card.card-1 {
    top: 10%;
    right: 10%;
    animation-delay: 0s;
}

.float-card.card-2 {
    top: 40%;
    left: 5%;
    animation-delay: 2s;
}

.float-card.card-3 {
    bottom: 20%;
    right: 15%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.hero-image-wrapper {
    position: relative;
}

.orbit-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 500px;
    height: 500px;
    border: 2px solid var(--glass-border);
    border-radius: 50%;
    animation: orbit 20s linear infinite;
}

.orbit-ring::before {
    content: '';
    position: absolute;
    top: -5px;
    left: 50%;
    width: 15px;
    height: 15px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--primary);
}

@keyframes orbit {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero-image {
    width: 100%;
    animation: float-image 6s ease-in-out infinite;
    position: relative;
    z-index: 1;
}

@keyframes float-image {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-10px) rotate(-1deg); }
    75% { transform: translateY(10px) rotate(1deg); }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: fade-in-up 1s ease 2s forwards;
    opacity: 0;
}

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid var(--gray);
    border-radius: 15px;
    margin: 0 auto 8px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 25px; }
}

/* Features Section */
.features-section {
    position: relative;
    z-index: 1;
    padding: 100px 0;
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.2rem;
    color: var(--gray);
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
    padding: 30px;
    transition: all var(--transition-smooth);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
    border-color: var(--primary);
}

/* Feature Card */
.feature-card {
    text-align: center;
    height: 100%;
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    font-size: 2rem;
    color: var(--primary);
}

.neo-icon {
    background: var(--dark-2);
    box-shadow: var(--neo-shadow);
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.feature-progress {
    height: 4px;
    background: var(--dark-3);
    border-radius: 2px;
    overflow: hidden;
}

.feature-progress .progress-bar {
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
    animation: progress-glow 2s ease-in-out infinite;
}

@keyframes progress-glow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Footer */
.footer-section {
    position: relative;
    z-index: 1;
    background: var(--dark-2);
    border-top: 1px solid var(--glass-border);
    padding: 80px 0 30px;
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 15px;
}

.footer-section h6 {
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--light);
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: var(--gray);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--primary-light);
}

.footer-divider {
    border-color: var(--glass-border);
    margin: 30px 0;
}

.glass-input {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--light);
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.glass-input:focus {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
    color: var(--light);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.social-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--dark-3);
    color: var(--gray);
    text-decoration: none;
    transition: all var(--transition-smooth);
}

.social-icon:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

/* Responsive Design */
@media (max-width: 991px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-visual {
        margin-top: 50px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .glass-nav {
        padding: 10px 0;
    }
    
    .navbar-collapse {
        background: var(--glass-bg);
        backdrop-filter: var(--glass-blur);
        border-radius: var(--radius-lg);
        padding: 20px;
        margin-top: 10px;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .social-links {
        justify-content: center;
        margin-top: 20px;
    }
    
    .orbit-ring {
        width: 300px;
        height: 300px;
    }
}