:root {
    --stone-50: #fafaf9;
    --stone-100: #f5f5f4;
    --stone-200: #e7e5e4;
    --stone-300: #d6d3d1;
    --stone-400: #a8a29e;
    --stone-500: #78716c;
    --stone-600: #57534e;
    --stone-700: #44403c;
    --stone-800: #292524;
    --stone-900: #1c1917;
    --stone-950: #0c0a09;
    
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-400: #60a5fa;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-900: #1e3a8a;
    
    --orange-400: #fb923c;
    --orange-500: #f97316;
    
    --green-500: #22c55e;
    --green-600: #16a34a;
    
    --red-400: #f87171;
    --red-500: #ef4444;
    --red-600: #dc2626;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--stone-950);
    color: var(--stone-100);
    line-height: 1.7;
    overflow-x: hidden;
    font-feature-settings: 'kern' 1, 'liga' 1;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 32px;
    background: rgba(12, 10, 9, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(250, 250, 249, 0.08);
}

.nav-brand h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--stone-50);
    letter-spacing: -0.025em;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--stone-400);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    letter-spacing: -0.01em;
    transition: color 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--blue-500);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-links a:hover {
    color: var(--stone-50);
}

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

.nav-links a:focus {
    outline: 2px solid var(--blue-500);
    outline-offset: 4px;
    border-radius: 4px;
}

.btn:focus {
    outline: 2px solid var(--blue-500);
    outline-offset: 2px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 32px 80px;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.15), transparent),
        radial-gradient(ellipse 60% 80% at 50% 120%, rgba(249, 115, 22, 0.1), transparent);
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(1px 1px at 40px 60px, rgba(250, 250, 249, 0.15), transparent),
        radial-gradient(1px 1px at 120px 20px, rgba(250, 250, 249, 0.1), transparent),
        radial-gradient(1px 1px at 200px 100px, rgba(250, 250, 249, 0.08), transparent),
        radial-gradient(1px 1px at 300px 40px, rgba(250, 250, 249, 0.12), transparent);
    background-size: 400px 200px;
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: clamp(48px, 8vw, 84px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--stone-50) 0%, var(--stone-300) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content h2 {
    font-size: 22px;
    color: var(--stone-400);
    margin-bottom: 16px;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.hero-content p {
    font-size: 18px;
    color: var(--stone-400);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 15px;
    letter-spacing: -0.01em;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    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: var(--blue-600);
    color: white;
    box-shadow: 
        0 4px 14px 0 rgba(37, 99, 235, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    background: var(--blue-700);
    transform: translateY(-1px);
    box-shadow: 
        0 8px 25px 0 rgba(37, 99, 235, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

/* Sections */
section {
    padding: 100px 0;
}

section h2 {
    font-size: clamp(32px, 5vw, 48px);
    text-align: center;
    margin-bottom: 64px;
    color: var(--stone-50);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

/* About Section */
.about {
    background: linear-gradient(180deg, var(--stone-950) 0%, rgba(28, 25, 23, 0.8) 100%);
    border-top: 1px solid rgba(250, 250, 249, 0.05);
}

.about-content {
    display: grid;
    grid-template-columns: 1.8fr 1fr;
    gap: 64px;
    align-items: start;
}

.about-text p {
    font-size: 18px;
    color: var(--stone-300);
    margin-bottom: 28px;
    line-height: 1.7;
    font-weight: 400;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.goals-card {
    background: linear-gradient(135deg, rgba(250, 250, 249, 0.05) 0%, rgba(250, 250, 249, 0.02) 100%);
    padding: 32px;
    border-radius: 20px;
    border: 1px solid rgba(250, 250, 249, 0.08);
    text-align: center;
    backdrop-filter: blur(20px);
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.3),
        0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

.goal-icon {
    font-size: 40px;
    color: var(--blue-500);
    margin-bottom: 20px;
    opacity: 0.9;
}

.goals-card h3 {
    color: var(--stone-50);
    margin-bottom: 16px;
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.goals-card p {
    color: var(--stone-300);
    line-height: 1.6;
    font-size: 15px;
}

/* Interests Section */
.interests {
    background: var(--stone-950);
}

.interests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
}

.interest-card {
    background: linear-gradient(135deg, rgba(250, 250, 249, 0.03) 0%, rgba(250, 250, 249, 0.01) 100%);
    padding: 40px 32px;
    border-radius: 16px;
    border: 1px solid rgba(250, 250, 249, 0.06);
    text-align: left;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.interest-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.5), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.interest-card:hover {
    transform: translateY(-8px);
    border-color: rgba(59, 130, 246, 0.2);
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.4),
        0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

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

.interest-icon {
    font-size: 32px;
    color: var(--blue-500);
    margin-bottom: 20px;
    opacity: 0.9;
}

.interest-card h3 {
    color: var(--stone-50);
    margin-bottom: 16px;
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.interest-card p {
    color: var(--stone-300);
    line-height: 1.6;
    font-size: 15px;
}

/* Experience Section */
.experience {
    background: linear-gradient(180deg, rgba(28, 25, 23, 0.8) 0%, var(--stone-950) 100%);
    border-top: 1px solid rgba(250, 250, 249, 0.05);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    gap: 32px;
    margin-bottom: 60px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 32px;
    top: 80px;
    bottom: -30px;
    width: 2px;
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.5) 0%, rgba(59, 130, 246, 0.1) 100%);
}

.timeline-item:last-child::before {
    display: none;
}

.timeline-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-700) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
    box-shadow: 
        0 8px 20px rgba(37, 99, 235, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    font-size: 20px;
}

.timeline-content {
    flex: 1;
    padding-top: 8px;
}

.timeline-content h3 {
    color: var(--stone-50);
    margin-bottom: 8px;
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.timeline-date {
    color: var(--orange-400);
    font-weight: 600;
    margin-bottom: 16px;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timeline-content p {
    color: var(--stone-300);
    line-height: 1.7;
    font-size: 16px;
}

/* Footer */
.footer {
    background: var(--stone-950);
    text-align: center;
    padding: 60px 32px;
    border-top: 1px solid rgba(250, 250, 249, 0.08);
}

.footer .footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.footer p {
    color: var(--stone-400);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}

.footer-note {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(29, 78, 216, 0.03) 100%);
    border: 1px solid rgba(250, 250, 249, 0.08);
    border-radius: 16px;
    padding: 32px;
    backdrop-filter: blur(20px);
}

.footer-note p {
    color: var(--stone-300);
    font-size: 15px;
    font-weight: 500;
    line-height: 1.7;
    font-style: italic;
    margin: 0;
    text-align: left;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .interests-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav {
        padding: 20px 24px;
    }
    
    .nav-links {
        gap: 24px;
    }
    
    .hero {
        padding: 100px 24px 60px;
    }
    
    .container {
        padding: 0 24px;
    }
    
    section {
        padding: 80px 0;
    }
    
    section h2 {
        margin-bottom: 48px;
    }
    
    .interests-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .interest-card {
        padding: 32px 24px;
    }
    
    .timeline-item {
        gap: 20px;
    }
    
    .timeline-icon {
        width: 56px;
        height: 56px;
        font-size: 18px;
    }
    
    .timeline-item::before {
        left: 28px;
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: 80px 20px 40px;
    }
    
    .container {
        padding: 0 20px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .timeline-item {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
    
    .timeline-item::before {
        display: none;
    }
    
    .timeline-content {
        padding-top: 0;
    }
}