:root {
    --primary: #2563eb;
    --dark: #111827;
    --light: #f9fafb;
    --border: #e5e7eb;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--light);
    color: var(--dark);
    display: grid;
    grid-template-rows: auto 1fr auto;
    min-height: 100vh;
}

section{
margin:80px 0;
}

h1{
font-size:2.2rem;
margin-bottom:20px;
}

h2{
font-size:1.6rem;
margin-bottom:20px;
}

h3{
font-size:1.2rem;
margin-bottom:10px;
}


.container{
max-width:1100px;
margin:0 auto;
padding:40px 20px;
}


/* Header */
.site-header {
    background: white;
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}

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

.logo {
    font-weight: 600;
    font-size: 28px;
}

.nav a {
    margin-left: 16px;
    text-decoration: none;
    color: var(--dark);
    font-size: 14px;
}

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

.nav a.active {
    color: var(--primary);
    font-weight: 600;
    border-bottom: 2px solid var(--primary);
    padding-bottom: 2px;
}


/* Hero */
.hero{
    max-width:750px;
}

.hero p{
    font-size:1.1rem;
    color:#4b5563;
    line-height:1.6;
}


.hero h1 {
    font-size: 32px;
}

.btn{
    display:inline-block;
    margin-top:15px;
    padding:10px 18px;
    background:#2563eb;
    color:white;
    text-decoration:none;
    border-radius:6px;
    font-weight:500;
    transition:all .2s ease;
}

.btn:hover{
    background:#1d4ed8;
    transform:translateY(-1px);
}


/* Cards */
    .cards{
    display:grid;
    grid-template-columns:repeat(auto-fit, minmax(260px, 1fr));
    gap:20px;
    margin-top:20px;
}


.focus{
    margin: 60px 0 60px;
    text-align: center;
}

.focus h2{
    margin-bottom: 20px;
}

.focus ul{
    list-style: none;
    padding: 0;
    max-width: 600px;
    margin: 0 auto;
}

.focus li{
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    color: #374151;
}

.focus li,
.architecture li,
.tech-list li{
    margin-bottom:10px;
    line-height:1.5;
}


.focus li::before{
    content: "•";
    color: var(--primary);
    margin-right: 8px;
}

.projects{
margin:60px 0;
text-align:center;
}

.card{
    background:white;
    border:1px solid #e5e7eb;
    border-radius:10px;
    padding:22px;
    transition:all .2s ease;
}

.card:hover{
    transform:translateY(-4px);
    box-shadow:0 10px 25px rgba(0,0,0,0.08);
}


/* About Page */
.experience{
    margin:40px 0;
    max-width:800px;
}

.experience{
    margin:40px 0;
    max-width:800px;
}

.leadership{
    margin:40px 0;
}

/* Contact */
.contact-info{
    margin:40px 0;
    text-align:center;
}

/* Case Study */
.case-section{
    margin:60px 0;
    max-width:900px;
}

.architecture,
.tech-list{
    margin-top:20px;
    padding-left:20px;
}

.architecture li,
.tech-list li{
    margin-bottom:8px;
}

/* Footer */
.site-footer {
    background: white;
    border-top: 1px solid var(--border);
    padding: 16px 0;
    text-align: center;
    font-size: 13px;
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        margin-top: 8px;
    }
    .nav a {
        margin-left: 0;
        margin-right: 12px;
    }

    .container{
    padding:30px 16px;
    }

    h1{
    font-size:1.8rem;
    }

    h2{
    font-size:1.4rem;
    }
}