@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

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

:root {
    --bg-dark: #0D1117;
    --bg-medium: #161B22;
    --border-color: #30363D;
    --text-primary: #C9D1D9;
    --text-secondary: #8B949E;
    --accent-primary: #58A6FF;
    --accent-hover: #79C0FF;
    --success-color: #3FB950;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

header {
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 1rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    animation: slideDown 1s ease-out;
    height: 70px;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    height: 40px;
    width: 40px;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.logo:hover {
    transform: rotate(15deg) scale(1.1);
}

header h1 {
    font-weight: 700;
    font-size: 1.75rem;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 0.5rem;
}

nav ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    padding: 10px 20px;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
}

nav ul li a:hover {
    background-color: var(--bg-medium);
    color: var(--text-primary);
}

section {
    padding: 8rem 3rem;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

section:last-of-type {
    border-bottom: none;
}

#welcome {
    text-align: center;
    min-height: calc(100vh - 70px);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

section h2 {
    font-weight: 800;
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--text-primary);
    letter-spacing: -1px;
}

section > p {
    font-size: clamp(1.1rem, 2.5vw, 1.25rem);
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem;
    color: var(--text-secondary);
}

#welcome ul {
    list-style: none;
    max-width: 800px;
    margin: 2rem auto 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    text-align: left;
}

#welcome ul li {
    background: var(--bg-medium);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

#welcome ul li:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    color: var(--accent-hover);
}

#services ul {
    list-style: none;
    max-width: 1200px;
    margin: 2rem auto 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

#services ul li {
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

#services ul li:hover {
    transform: translateY(-10px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

#services ul li h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

#services ul li p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    flex-grow: 1;
}

#contact ul {
    list-style: none;
    max-width: 700px;
    margin: 2rem auto 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

#contact ul li a {
    display: block;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.2rem;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    background-color: var(--bg-medium);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

#contact ul li a:hover {
    transform: scale(1.05);
    color: white;
}

#contact ul li a[href*="t.me"]:hover {
    background-color: #229ED9;
    border-color: #229ED9;
}

#contact ul li a[href*="wa.me"]:hover {
    background-color: #25D366;
    border-color: #25D366;
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

/* Animation on scroll */
.reveal-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275), transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.reveal-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 0.8rem 1.5rem;
    }
    nav {
        display: none; /* For simplicity, hiding nav on mobile. A burger menu would be the next step. */
    }
    section {
        padding: 4rem 1.5rem;
    }
}