/* 
   Be Star U - Minimalist Design System
   Aesthetic: Apple-style, Clean, Premium
*/

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

:root {
    --bg-color: #ffffff;
    --secondary-bg: #f5f5f7;
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --accent-blue: #0066cc;
    --border-color: #d2d2d7;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: all 0.5s cubic-bezier(0.28, 0.11, 0.32, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.5;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 120px 0;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.08);
}

.nav-content {
    height: 48px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 400;
    opacity: 0.8;
    transition: var(--transition);
}

.nav-links a:hover {
    opacity: 1;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    text-align: center;
    padding-top: 120px;
    background: var(--bg-color);
}

.hero-content {
    max-width: 900px;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: clamp(3.5rem, 12vw, 6rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.6rem;
    font-weight: 500;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 3rem;
}

.hero-visual {
    width: 100%;
    max-width: 600px;
    margin-top: 2rem;
    animation: fadeInUp 1.2s ease-out;
}

.hero-visual img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

/* Buttons */
.cta-group {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.btn {
    padding: 0.8rem 1.6rem;
    border-radius: 980px;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
}

.btn-primary {
    background: var(--accent-blue);
    color: #fff;
}

.btn-primary:hover {
    background: #0077ed;
}

.btn-link {
    color: var(--accent-blue);
    display: flex;
    align-items: center;
    gap: 5px;
}

.btn-link:hover {
    text-decoration: underline;
}

/* About Section */
.about {
    background: var(--secondary-bg);
}

.about-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.about h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

.about p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.service-card {
    background: var(--secondary-bg);
    border-radius: 28px;
    padding: 3.5rem;
    text-align: center;
    transition: var(--transition);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.service-card img {
    width: 100%;
    max-width: 300px;
    height: auto;
    margin-bottom: 2.5rem;
    transition: transform 0.8s cubic-bezier(0.28, 0.11, 0.32, 1);
}

.service-card:hover img {
    transform: scale(1.05);
}

.service-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 300px;
}

/* Contact */
.contact {
    text-align: center;
}

.contact h2 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
}

.contact-email {
    font-size: 1.5rem;
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 500;
}

/* Footer */
footer {
    padding: 4rem 0;
    background: var(--secondary-bg);
    color: var(--text-secondary);
    font-size: 0.75rem;
    border-top: 1px solid var(--border-color);
}

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

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s cubic-bezier(0.28, 0.11, 0.32, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
    .hero h1 {
        font-size: 3.5rem;
    }
    .nav-links {
        display: none;
    }
}