/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
    --primary-green: hsl(142, 71%, 45%);
    --primary-green-dark: hsl(142, 71%, 35%);
    --primary-green-light: hsl(142, 71%, 55%);
    --accent-gradient: linear-gradient(135deg, hsl(142, 71%, 45%), hsl(120, 61%, 50%));
    --dark-bg: hsl(220, 13%, 13%);
    --dark-card: hsl(220, 13%, 18%);
    --text-primary: hsl(0, 0%, 95%);
    --text-secondary: hsl(0, 0%, 75%);
    --text-muted: hsl(0, 0%, 60%);
    --border-color: hsla(0, 0%, 100%, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    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(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ============================================
   Header & Navigation
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(28, 31, 36, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

.logo:hover {
    transform: translateY(-2px);
}

.logo-icon {
    width: 45px;
    height: 45px;
    object-fit: contain;
    filter: drop-shadow(0 0 8px rgba(52, 211, 153, 0.4));
    transition: var(--transition);
}

.logo:hover .logo-icon {
    filter: drop-shadow(0 0 12px rgba(52, 211, 153, 0.6));
}

.logo-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

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

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 50%, hsla(142, 71%, 45%, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, hsla(120, 61%, 50%, 0.1) 0%, transparent 50%),
        linear-gradient(180deg, var(--dark-bg) 0%, hsl(220, 13%, 16%) 100%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease-out;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--accent-gradient);
    color: white;
    text-decoration: none;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    box-shadow: 0 8px 24px rgba(52, 211, 153, 0.3);
    transition: var(--transition);
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(52, 211, 153, 0.4);
}

.cta-button .arrow {
    transition: var(--transition);
}

.cta-button:hover .arrow {
    transform: translateX(5px);
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.scroll-line {
    width: 2px;
    height: 50px;
    background: linear-gradient(to bottom, var(--primary-green), transparent);
    animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
    0%, 100% { transform: translateY(0); opacity: 0; }
    50% { transform: translateY(15px); opacity: 1; }
}

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

/* ============================================
   About Section
   ============================================ */
.about {
    padding: 8rem 0;
    background: linear-gradient(180deg, hsl(220, 13%, 16%) 0%, var(--dark-bg) 100%);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    color: var(--primary-green);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.about-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-green);
}

.about-card:hover::before {
    opacity: 0.05;
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 12px rgba(52, 211, 153, 0.3));
}

.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    position: relative;
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    position: relative;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    padding: 8rem 0;
    background: var(--dark-bg);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact-description {
    color: var(--text-secondary);
    font-size: 1.15rem;
    margin-bottom: 3rem;
}

.contact-card {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3rem;
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-green);
}

.contact-icon {
    font-size: 3rem;
    filter: drop-shadow(0 0 12px rgba(52, 211, 153, 0.3));
}

.contact-details {
    text-align: left;
}

.contact-details h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-link {
    color: var(--primary-green);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
}

.contact-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-green);
    transition: width 0.3s ease;
}

.contact-link:hover {
    color: var(--primary-green-light);
}

.contact-link:hover::after {
    width: 100%;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--dark-card);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-text {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .nav {
        gap: 1.5rem;
    }

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

    .contact-card {
        flex-direction: column;
        text-align: center;
    }

    .contact-details {
        text-align: center;
    }

    .container {
        padding: 0 1.5rem;
    }
}

@media (max-width: 480px) {
    .nav {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.9rem;
    }

    .logo-text {
        font-size: 1.2rem;
    }
}