/* =======================================
   Quantum Spintronics Laboratory (Q-SPIN LAB)
   Main Stylesheet
======================================= */

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

html{
    scroll-behavior:smooth;
}

body{

    font-family:'Inter',sans-serif;

    background:#f4f7fb;

    color:#222;

    line-height:1.8;

}

/* Container */

.container{

    width:90%;

    max-width:1200px;

    margin:auto;

}

/* Header */

header{

    background:#001b3a;

    color:white;

    position:sticky;

    top:0;

    z-index:999;

    box-shadow:0 5px 20px rgba(0,0,0,.15);

}

.nav-container{

    display:flex;

    justify-content:space-between;

    align-items:center;

    padding:18px 0;

}

.logo{

    display:flex;

    flex-direction:column;

}

.logo h2{

    font-size:30px;

    color:#00d4ff;

}

.logo span{

    font-size:13px;

    opacity:.85;

}

/* Navigation */

nav ul{

    display:flex;

    list-style:none;

    gap:25px;

}

nav a{

    color:white;

    text-decoration:none;

    font-weight:600;

    transition:.3s;

}

nav a:hover{

    color:#00d4ff;

}

nav a.active{

    color:#00d4ff;

}

/* Hero */

.hero{

    background:linear-gradient(135deg,#002147,#005b96);

    color:white;

    text-align:center;

    padding:120px 20px;

}

.hero h1{

    font-size:60px;

    margin-bottom:20px;

}

.hero h3{

    font-weight:400;

    margin-bottom:10px;

}

.hero p{

    max-width:900px;

    margin:30px auto;

    font-size:22px;

}

/* Button */

.button{

    display:inline-block;

    margin-top:20px;

    padding:14px 32px;

    background:#00d4ff;

    color:#001b3a;

    text-decoration:none;

    font-weight:700;

    border-radius:40px;

    transition:.3s;

}

.button:hover{

    transform:translateY(-3px);

    background:white;

}

/* Sections */

section{

    padding:70px 0;

}

.section-title{

    font-size:38px;

    margin-bottom:35px;

    color:#002147;

}

/* Cards */

.card{

    background:white;

    padding:35px;

    border-radius:12px;

    box-shadow:0 8px 25px rgba(0,0,0,.08);

    margin-bottom:30px;

    transition:.3s;

}

.card:hover{

    transform:translateY(-5px);

}

.card h3{

    color:#002147;

    margin-bottom:15px;

}

/* Grid */

.grid{

    display:grid;

    grid-template-columns:repeat(auto-fit,minmax(280px,1fr));

    gap:30px;

}

/* Stats */

.stats{

    background:#002147;

    color:white;

}

.stats-grid{

    display:grid;

    grid-template-columns:repeat(auto-fit,minmax(200px,1fr));

    gap:20px;

    text-align:center;

}

.stats h2{

    font-size:54px;

    color:#00d4ff;

}

.stats p{

    margin-top:10px;

    font-size:18px;

}

/* Footer */

footer{

    background:#00152d;

    color:white;

    text-align:center;

    padding:50px 20px;

}

footer h3{

    margin-bottom:20px;

    color:#00d4ff;

}

footer p{

    opacity:.9;

    margin:10px 0;

}

/* Tables */

table{

    width:100%;

    border-collapse:collapse;

}

th,td{

    border:1px solid #ddd;

    padding:12px;

}

th{

    background:#002147;

    color:white;

}

/* Lists */

ul{

    padding-left:20px;

}

/* Responsive */

@media(max-width:900px){

.hero h1{

font-size:42px;

}

.hero p{

font-size:18px;

}

.nav-container{

flex-direction:column;

gap:20px;

}

nav ul{

flex-wrap:wrap;

justify-content:center;

gap:15px;

}

.section-title{

font-size:30px;

}

}

/* Smooth Animation */

.card{

animation:fadeIn .8s ease;

}

@keyframes fadeIn{

from{

opacity:0;

transform:translateY(20px);

}

to{

opacity:1;

transform:translateY(0);

}

}