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

:root {
    --primary-bg: #000000;
    --secondary-bg: #111111;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --accent-color: #4a90e2;
    --spacing-xl: 120px;
    --spacing-lg: 80px;
    --spacing-md: 40px;
    --spacing-sm: 20px;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

header.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    position: relative;
}

.logo {
    flex-shrink: 0;
    z-index: 10;
}

.logo img {
    height: 50px;
    width: auto;
    transition: all 0.3s ease;
    cursor: pointer;
}

.logo img:hover {
    transform: scale(1.1);
    filter: drop-shadow(0 0 15px var(--accent-color));
}

nav {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-md);
}

nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    letter-spacing: 0.5px;
    position: relative;
    padding: 8px 0;
    transition: color 0.3s ease;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--text-primary);
    transition: width 0.3s ease;
}

nav a:hover {
    color: var(--text-primary);
}

nav a:hover::after {
    width: 100%;
}

/* Hero Section */
#hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: clamp(60px, 10vw, 120px);
    font-weight: 900;
    letter-spacing: -2px;
    margin-bottom: var(--spacing-sm);
}

.typing-container {
    font-size: clamp(40px, 7vw, 80px);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

#typed-text {
    border-bottom: 4px solid var(--text-primary);
    padding-bottom: 5px;
}

.cursor {
    font-weight: 300;
    animation: blink 0.8s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.cta-button {
    background-color: var(--text-primary);
    color: var(--primary-bg);
    border: none;
    padding: 20px 50px;
    font-size: 18px;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.cta-button:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 40px rgba(255, 255, 255, 0.3);
}

/* Content Sections */
.content-section {
    padding: var(--spacing-xl) 0;
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

.content-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.content-section.dark {
    background-color: var(--secondary-bg);
}

.section-title {
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
}

.section-description {
    font-size: clamp(18px, 2vw, 24px);
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 900px;
    font-weight: 300;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.content-item {
    padding: var(--spacing-md);
}

.content-item h3 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.5px;
}

.content-item p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    font-weight: 300;
}

/* Achievements Grid */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.achievement-card {
    background-color: var(--secondary-bg);
    padding: var(--spacing-md);
    border-radius: 8px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid transparent;
}

.achievement-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    border-color: rgba(255, 255, 255, 0.1);
}

.achievement-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.5px;
}

.achievement-card p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    font-weight: 300;
}

/* Responsive Design */
@media (max-width: 768px) {
    nav {
        position: static;
        transform: none;
        flex-direction: column;
        gap: var(--spacing-sm);
        margin-top: var(--spacing-sm);
    }

    header .container {
        flex-direction: column;
        align-items: center;
    }

    .logo img {
        height: 40px;
    }

    nav a {
        font-size: 14px;
    }

    .typing-container {
        min-height: 80px;
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .achievements-grid {
        grid-template-columns: 1fr;
    }

    :root {
        --spacing-xl: 80px;
        --spacing-lg: 60px;
        --spacing-md: 30px;
        --spacing-sm: 15px;
    }
}

@media (max-width: 480px) {
    .cta-button {
        padding: 15px 35px;
        font-size: 16px;
    }
}