/* Zaitsev Holding Group - Elite Private Equity Stylesheet */
/* World-Class Design Rivaling Top Wall Street Firms */

/* ==================== ELITE COLOR PALETTE ==================== */
:root {
    /* Heritage Colors - 100+ Year Legacy Feel */
    --deep-obsidian: #080808;
    --rich-charcoal: #121212;
    --midnight-black: #0D0D0D;
    --heritage-gray: #1C1C1C;
    --sophisticated-slate: #2A2A2A;
    
    /* Wealth Colors - Old Money Prestige */
    --antique-gold: #B8941F;
    --champagne-gold: #C4A05E;
    --warm-bronze: #A67C00;
    --gold-highlight: rgba(196, 160, 94, 0.12);
    --gold-border: rgba(196, 160, 94, 0.25);
    
    /* Modern Fintech Colors */
    --tech-slate: #3D4F5F;
    --fintech-blue: #4A6FA5;
    --cyber-gray: #8B9CB5;
    --sophisticated-blue: #6B7C93;
    
    /* Typography Colors */
    --ink-black: #0A0A0A;
    --premier-gray: #2D3748;
    --text-primary: #1A202C;
    --text-secondary: #4A5568;
    --text-muted: #718096;
    --text-elevated: #A0AEC0;
    
    /* Backgrounds */
    --bg-crisp: #FFFFFF;
    --bg-off-white: #F7F8FA;
    --bg-warm-gray: #F0F1F3;
    --bg-premium: #F8F9FB;
    
    /* Borders & Lines */
    --border-premium: #E2E8F0;
    --border-elite: #CBD5E0;
    --border-gold: rgba(184, 148, 31, 0.2);
    
    /* Typography */
    --font-premier: 'Cormorant Garamond', 'Times New Roman', serif;
    --font-sophisticated: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Transitions */
    --transition-luxury: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-elegant: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    
    /* Shadows - Ultra-Refined */
    --shadow-luxury: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-premium: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-elevated: 0 20px 60px rgba(0, 0, 0, 0.15);
    --shadow-subtle: 0 2px 12px rgba(0, 0, 0, 0.04);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    --space-xxl: 8rem;
}

/* ==================== RESET & BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sophisticated);
    background-color: var(--bg-crisp);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* ==================== WORLD-CLASS TYPOGRAPHY ==================== */

/* Premier Headings - Cormorant Garamond for Heritage */
h1, h2, h3 {
    font-family: var(--font-premier);
    font-weight: 400;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    color: var(--ink-black);
}

h1 {
    font-size: 4.5rem;
    font-weight: 300;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

h2 {
    font-size: 3rem;
    font-weight: 300;
    letter-spacing: -0.015em;
}

h3 {
    font-size: 2.25rem;
    font-weight: 400;
}

h4, h5, h6 {
    font-family: var(--font-sophisticated);
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

h4 {
    font-size: 1.5rem;
    font-weight: 600;
}

h5 {
    font-size: 1.25rem;
    font-weight: 500;
}

h6 {
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

/* Elegant Paragraphs */
p {
    margin-bottom: 1.75rem;
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.8;
    max-width: 70ch;
    font-weight: 400;
}

/* Links */
a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-elegant);
}

/* ==================== ELITE NAVIGATION ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to bottom, rgba(8, 8, 8, 0.99), rgba(18, 18, 18, 0.97));
    backdrop-filter: blur(20px);
    padding: 1.25rem 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-gold);
}

.nav-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    text-decoration: none;
    transition: var(--transition-elegant);
}

.nav-logo:hover {
    opacity: 0.9;
}

.nav-logo img {
    height: 45px;
    width: auto;
}

.nav-logo-text {
    color: var(--champagne-gold);
    font-family: var(--font-premier);
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.03em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 4rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-elevated);
    font-family: var(--font-sophisticated);
    font-weight: 400;
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 0.375rem;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--antique-gold), var(--champagne-gold));
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.nav-menu a:hover {
    color: var(--champagne-gold);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--champagne-gold);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: var(--transition-elegant);
}

/* ==================== SPECTACULAR HERO SECTION ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--deep-obsidian) 0%, var(--midnight-black) 50%, var(--rich-charcoal) 100%);
    padding: 8rem 3rem 5rem;
    position: relative;
    overflow: hidden;
}

/* Hero Background Effects */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 30%, rgba(184, 148, 31, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(74, 111, 165, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-gold), transparent);
}

.hero-content {
    max-width: 1100px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero h1 {
    color: var(--champagne-gold);
    margin-bottom: 2.5rem;
    line-height: 1.1;
    font-weight: 300;
}

.hero-tagline {
    display: inline-block;
    color: var(--text-elevated);
    font-family: var(--font-sophisticated);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 2rem;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border-gold);
    background: rgba(196, 160, 94, 0.05);
}

.hero p {
    color: var(--text-elevated);
    font-size: 1.4rem;
    margin-bottom: 3.5rem;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 300;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==================== LUXURY BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1.125rem 3rem;
    font-family: var(--font-sophisticated);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-decoration: none;
    transition: var(--transition-luxury);
    cursor: pointer;
    border-radius: 0;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--antique-gold) 0%, var(--champagne-gold) 100%);
    color: var(--deep-obsidian);
    border: 1px solid var(--antique-gold);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--champagne-gold) 0%, var(--warm-bronze) 100%);
    border-color: var(--warm-bronze);
    transform: translateY(-2px);
    box-shadow: var(--shadow-premium);
}

.btn-secondary {
    background: transparent;
    color: var(--champagne-gold);
    border: 1px solid var(--gold-border);
}

.btn-secondary:hover {
    background: rgba(196, 160, 94, 0.1);
    border-color: var(--champagne-gold);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-elevated);
    border: 1px solid rgba(160, 174, 192, 0.3);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--champagne-gold);
    border-color: var(--champagne-gold);
}

/* ==================== PREMIUM SECTIONS ==================== */
.section {
    padding: 8rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.section-tagline {
    display: inline-block;
    color: var(--antique-gold);
    font-family: var(--font-sophisticated);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.section-title {
    color: var(--ink-black);
    margin-bottom: 1.75rem;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.25rem;
    line-height: 1.7;
    max-width: 65ch;
    margin: 0 auto;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 3rem;
}

/* ==================== ELITE CARDS ==================== */
.card {
    background: var(--bg-crisp);
    border: 1px solid var(--border-premium);
    padding: 3rem;
    transition: var(--transition-luxury);
    box-shadow: var(--shadow-subtle);
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--antique-gold), var(--champagne-gold));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.card:hover {
    border-color: var(--border-gold);
    box-shadow: var(--shadow-premium);
    transform: translateY(-6px);
}

.card:hover::before {
    opacity: 1;
}

.card-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-premium);
}

.card-title {
    font-family: var(--font-premier);
    font-size: 2rem;
    font-weight: 400;
    color: var(--ink-black);
    margin-bottom: 0.5rem;
}

.card-description {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

.card-footer {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-premium);
}

/* ==================== ELEGANT DIVIDERS ==================== */
.divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin: 5rem auto;
    max-width: 200px;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-gold);
}

.divider-center {
    width: 60px;
    height: 1px;
    background: var(--antique-gold);
}

.divider-full {
    border-top: 1px solid var(--border-premium);
    margin: 6rem 0;
}

/* ==================== STATS SECTION ==================== */
.stats-section {
    background: var(--bg-premium);
    padding: 6rem 0;
    border-top: 1px solid var(--border-premium);
    border-bottom: 1px solid var(--border-premium);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
    text-align: center;
}

.stat-item {
    padding: 2rem;
}

.stat-number {
    font-family: var(--font-premier);
    font-size: 4rem;
    font-weight: 300;
    color: var(--antique-gold);
    line-height: 1;
    margin-bottom: 0.75rem;
}

.stat-label {
    font-family: var(--font-sophisticated);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
}

/* ==================== FOOTER ==================== */
.footer {
    background: var(--deep-obsidian);
    padding: 6rem 0 3rem;
    color: var(--text-elevated);
    border-top: 1px solid var(--border-gold);
}

.footer-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 3rem;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand h4 {
    color: var(--champagne-gold);
    font-family: var(--font-premier);
    font-size: 1.75rem;
    font-weight: 300;
    margin-bottom: 1.5rem;
}

.footer-brand p {
    color: rgba(160, 174, 192, 0.8);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.footer-section h4 {
    color: var(--champagne-gold);
    font-family: var(--font-sophisticated);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 2rem;
}

.footer-section a {
    color: rgba(160, 174, 192, 0.7);
    font-size: 0.9375rem;
    line-height: 2;
    display: block;
    transition: var(--transition-elegant);
}

.footer-section a:hover {
    color: var(--champagne-gold);
    padding-left: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 3rem;
    border-top: 1px solid rgba(232, 232, 232, 0.08);
    color: rgba(160, 174, 192, 0.5);
    font-size: 0.875rem;
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 1200px) {
    h1 { font-size: 3.75rem; }
    h2 { font-size: 2.5rem; }
    h3 { font-size: 2rem; }
    
    .nav-menu {
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 16px;
    }
    
    h1 { font-size: 2.75rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--deep-obsidian);
        flex-direction: column;
        padding: 3rem;
        gap: 2rem;
        border-top: 1px solid var(--border-gold);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero {
        padding: 7rem 2rem 4rem;
    }
    
    .hero h1 {
        font-size: 2.25rem;
    }
    
    .hero p {
        font-size: 1.125rem;
    }
    
    .section {
        padding: 5rem 0;
    }
    
    .container {
        padding: 0 2rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .card {
        padding: 2rem;
    }
}

/* ==================== UTILITY CLASSES ==================== */
.text-gold { color: var(--antique-gold); }
.text-charcoal { color: var(--text-secondary); }
.bg-warm { background-color: var(--bg-warm-gray); }
.bg-premium { background-color: var(--bg-premium); }
.bg-dark { background-color: var(--deep-obsidian); }

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mt-4 { margin-top: 4rem; }
.mt-5 { margin-top: 5rem; }

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }
.mb-4 { margin-bottom: 4rem; }
.mb-5 { margin-bottom: 5rem; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* ==================== CARD GRIDS ==================== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

/* ==================== TAGS ==================== */
.card-tags {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.tag {
    background: var(--bg-warm-gray);
    color: var(--sophisticated-blue);
    padding: 0.625rem 1.25rem;
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* ==================== TECH FEATURES ==================== */
.tech-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 4rem;
    margin-top: 4rem;
}

.tech-feature {
    text-align: center;
    padding: 3rem 2rem;
}

.tech-feature i {
    font-size: 3rem;
    color: var(--antique-gold);
    margin-bottom: 2rem;
}

.tech-feature h4 {
    margin-bottom: 1.5rem;
    color: var(--ink-black);
    font-size: 1.375rem;
}

.tech-feature p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

/* ==================== RESPONSIVE GRIDS ==================== */
@media (max-width: 768px) {
    .cards-grid,
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .tech-features {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .stat-number {
        font-size: 3rem;
    }
}