:root {
    --primary-bg: #0a0f1e;
    --surface-bg: #111827;
    --accent-gold: #d4af37;
    --accent-gold-hover: #f1c40f;
    --accent-emerald: #10b981;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --transition-smooth: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Background Blobs */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    filter: blur(80px);
}

.blob {
    position: absolute;
    width: 40vw;
    height: 40vw;
    border-radius: 50%;
    opacity: 0.15;
    animation: float 20s infinite alternate;
}

.blob-1 {
    background-color: var(--accent-gold);
    top: -10%;
    right: -10%;
    animation-delay: 0s;
}

.blob-2 {
    background-color: #1a2a4b;
    bottom: -10%;
    left: -10%;
    animation-delay: -5s;
}

.blob-3 {
    background-color: var(--accent-emerald);
    top: 40%;
    left: 30%;
    width: 30vw;
    height: 30vw;
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(100px, 50px) scale(1.1); }
}

/* Navigation */
nav {
    padding: 2rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 2px;
}

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

.language-switcher {
    display: flex;
    gap: 0.5rem;
    background: var(--glass-bg);
    padding: 0.3rem;
    border-radius: 50px;
    border: 1px solid var(--glass-border);
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.lang-btn.active {
    background: var(--accent-gold);
    color: var(--primary-bg);
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    padding: 4rem 0;
    min-height: 80vh;
}

.hero-content {
    flex: 1;
}

h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #fff, #9ca3af);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.5rem;
    color: var(--accent-gold);
    margin-bottom: 2rem;
    font-weight: 300;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.book-card {
    position: relative;
    width: 350px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
    transition: var(--transition-smooth);
    transform-style: preserve-3d;
    perspective: 1000px;
}

.book-card img {
    width: 100%;
    border-radius: 12px;
    transition: var(--transition-smooth);
}

.book-card:hover {
    transform: rotateY(-10deg) rotateX(5deg) scale(1.05);
}

/* Downloads Section */
.downloads {
    padding: 6rem 0;
    text-align: center;
}

.downloads h2 {
    font-size: 2.5rem;
    margin-bottom: 4rem;
    position: relative;
    display: inline-block;
}

.downloads h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--accent-gold);
    border-radius: 2px;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.glass {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    border-radius: 24px;
    padding: 3rem 2rem;
    transition: var(--transition-smooth);
}

.download-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.card-icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.card-icon.excel {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-emerald);
}

.card-icon.numbers {
    background: rgba(212, 175, 55, 0.1);
    color: var(--accent-gold);
}

.download-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.download-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition-smooth);
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-emerald) 0%, #059669 100%);
    color: white;
    box-shadow: 0 10px 20px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(16, 185, 129, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--accent-gold) 0%, #b8860b 100%);
    color: var(--primary-bg);
    box-shadow: 0 10px 20px rgba(212, 175, 55, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(212, 175, 55, 0.4);
}

.hover-lift:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Footer */
footer {
    padding: 4rem 0;
    border-top: 1px solid var(--glass-border);
    margin-top: 4rem;
    text-align: center;
    color: var(--text-secondary);
}

/* Animations */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease-out forwards;
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 1s ease-out forwards;
}

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

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

/* Mobile Responsive */
@media (max-width: 968px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 2rem;
    }
    
    h1 {
        font-size: 3rem;
    }
    
    .hero-image {
        order: -1;
    }
    
    .book-card {
        width: 280px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2.2rem;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
}