/* ========== RESET ========== */
*{box-sizing:border-box}html,body{margin:0;padding:0;font-family:Inter,system-ui,-apple-system,'Segoe UI',Roboto,Arial;color:#e6eef8}

/* ========== THEME VARIABLES ========== */
:root{
  --g1:#0d1b2a; 
  --g2:#101828;
  --g3:#061226;
  --accent:#4aa3ff;
  --muted:#9aa6b2;
  --card:rgba(255,255,255,0.03);
  --glass:rgba(255,255,255,0.04);
  --radius:12px;
  --page-pad:5%;
}
.main-nav a {
  color: inherit;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 8px;
  transition: background 0.3s;
  font-weight: 500;
}
.main-nav a:hover {
  background: rgba(255,255,255,0.05);
  color: var(--accent);
}
.menu-toggle {
  display: none;
  background: transparent;
  border: 0;
  color: inherit;
  font-size: 24px;
  cursor: pointer;
}
@media (max-width: 980px){
  .main-nav {
    position: fixed;
    top: 60px;
    right: 0;
    width: 250px;
    height: 100vh;
    background: var(--g3);
    box-shadow: -4px 0 20px rgba(0,0,0,0.2);
    transform: translateX(100%);
    transition: transform 0.3s ease-out;
    z-index: 50;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .main-nav.open {
    transform: translateX(0);
  }
  .menu-toggle {
    display: block;
  }
  .main-nav a {
    padding: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }
}
/* light mode overrides */
body.light{
  --g1:#6badf0;
  --g2:#b4d9f7;
  --g3:#57808f;
  --accent:#4310bb;
  --muted:#475569;
  --card:rgba(0,0,0,0.04);
  color:#0b1220;
  .font-btn {
    border-color: var(--muted);
    color: var(--muted);
  }
}

/* page bg gradient */
body{
  background: linear-gradient(145deg,var(--g1),var(--g2),var(--g3));
  transition: background .45s,color .35s;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}

/* ========== HEADER ========== */
.site-header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:16px var(--page-pad);
  background:linear-gradient(90deg,rgba(255,255,255,0.02),rgba(255,255,255,0.01));
  backdrop-filter:blur(6px);
  position:sticky;
  top:0;
  z-index:40;
}
.site-header.small{padding:10px calc(var(--page-pad) - 8px)}
.hdr-left .brand{
  font-size:20px;
  color:var(--accent);
  font-weight:700;
}
.hdr-left .tag{
  font-size:13px;
  color:var(--muted);
  margin-top:3px;
}

/* header right */
.hdr-right{
  display:flex;
  align-items:center;
  gap:12px;
}
.font-controls{
  display:flex;
  align-items:center;
  gap:5px;
  margin-right: 15px;
}
.font-btn{
  background:transparent;
  border:1px solid var(--muted);
  color:var(--muted);
  font-weight: bold;
  padding: 3px 6px;
  cursor:pointer;
  border-radius:4px;
  transition:background-color .2s,color .2s, border-color .2s;
  font-size: 14px;
}
.font-btn.active {
  background-color: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.font-btn:hover:not(.active){
  color: var(--accent);
  border-color: var(--accent);
}
.search-wrap{
  display:flex;
  align-items:center;
  background:var(--card);
  padding:6px;
  border-radius:999px;
  gap:8px;
  box-shadow:0 8px 24px rgba(9,30,66,0.08);
}
.search-wrap input{
  background:transparent;
  border:0;color:inherit;
  padding:10px 12px;
  width:260px;
  outline:none;
}
.search-wrap input::placeholder{color:var(--muted)}
.search-wrap button{
  background:transparent;
  border:0;color:inherit;
  cursor:pointer;
  font-size:16px;
}
.mode-btn{
  background:transparent;
  border:0;
  color:inherit;
  font-size:18px;
  cursor:pointer;
}

/* ========== HERO ========== */
.hero{
  position:relative;
  height:56vh;
  min-height:320px;
  display:flex;
  align-items:center;
  overflow:hidden;
}
.hero-video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:brightness(.45);
  z-index: 1;
}
.hero-overlay{
  position:relative;
  z-index:2;
  padding:28px;
  max-width:1200px;
  color:#e6f7ff;
}
.hero-overlay h1{
  font-size:36px;
  margin:0 0 8px;
  line-height: 1.2;
}
.hero-overlay h1 span{color:var(--accent)}
.hero-overlay p{
  color:var(--muted);
  margin-bottom:14px;
}
.hero-ctas{
  display:flex;
  gap:12px;
}

/* buttons */
.btn{
  padding:10px 14px;
  border-radius:10px;
  border:0;
  cursor:pointer;
}
.btn.primary{
  background:linear-gradient(90deg,var(--accent),#1f78d1);
  color:#fff;
  box-shadow:0 12px 36px rgba(74,163,255,0.12);
}
.btn.ghost{
  background:transparent;
  border:1px solid rgba(255,255,255,0.06);
  color:inherit;
}

/* ========== LAYOUT ========== */
.container{
  max-width:1200px;
  margin:20px auto;
  padding:0 var(--page-pad);
  display:grid;
  grid-template-columns:2fr 1fr;
  gap:26px;
  transition: font-size 0.3s, background 0.45s, color 0.35s;
}
.font-normal .container{
  font-size:16px;
}
.font-normal .container p,
.font-normal .container .muted,
.font-normal .latest-item p{
  line-height: 1.6;
}
.font-small .container{
  font-size:14px;
}
.font-small .container p,
.font-small .container .muted,
.font-small .latest-item p{
  line-height: 1.5;
}
.font-large .container{
  font-size:18px;
}
.font-large .container p,
.font-large .container .muted,
.font-large .latest-item p{
  line-height: 1.8;
}
.font-small h1, .font-small h2 {font-size: 90%;}
.font-large h1, .font-large h2 {font-size: 110%;}
/* section head */
.section-head{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:12px;
}
.section-head h2{
  color:#dff2ff;
  margin:0;
}
.filters .chip{
  background:transparent;
  border:1px solid rgba(255,255,255,0.03);
  padding:8px 10px;
  border-radius:999px;
  color:var(--muted);
  cursor:pointer;
  transition:transform .18s;
}
.filters .chip:hover{
  transform:translateY(-4px);
  box-shadow:0 12px 30px rgba(9,30,66,0.06);
}

/* ========== CARDS ========== */
.news-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:18px;
}
.card{
  background:linear-gradient(180deg,rgba(255,255,255,0.02),transparent);
  border-radius:12px;
  overflow:hidden;
  box-shadow:0 12px 36px rgba(9,30,66,0.12);
  transition:transform .22s,box-shadow .22s;
  cursor:pointer;
  display:flex;
  flex-direction:column;
}
.card img{
  width:100%;
  height:200px;
  object-fit:cover;
}
.card .body{
  padding:14px;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.card h4{
  margin:0;
  color:#dff2ff;
}
.card p{
  margin:0;
  color:var(--muted);
  font-size:14px
}
.card:hover{
  transform:translateY(-8px);
  box-shadow:0 30px 70px rgba(9,30,66,0.18);
}

/* sidebar */
.sidebar{
  display:flex;
  flex-direction:column;
  gap:18px;
}
.latest h3{
  color:#dff2ff;
  margin:0;
}
.latest-item{
  display:flex;
  gap:10px;
  align-items:center;
  padding:8px;
  border-radius:10px;
  background:linear-gradient(180deg,rgba(255,255,255,0.02),transparent);
}
.latest-item img{
  width:92px;
  height:70px;
  object-fit:cover;
  border-radius:8px;
}
.muted{
  color:var(--muted);
  font-size:14px;
}

/* detail */
.detail-wrap{
  max-width:900px;
  margin:28px auto;
  padding:0 20px 60px;
}
.article-card{
  padding:18px;
  border-radius:12px;
  background:linear-gradient(180deg,rgba(255,255,255,0.02),transparent);
}
.detail-img{
  width:100%;
  height:420px;
  object-fit:cover;
  border-radius:12px;
  margin-bottom:14px;
}
.detail-body p{
  line-height:1.8;
  color:var(--muted);
}

/* footer */
.footer{
  background: linear-gradient(180deg, #0b1a33, #060d1a);
  padding: 40px 20px;
  color: #f0f0f0;
  margin-top: 60px;
  border-top: 1px solid rgba(255,255,255,0.01);
}
.footer-container{
  text-align: center;
  max-width: 800px;
  margin: auto;
}
.footer h3 {
  margin-bottom: 20px;
  font-size: 1.7rem;
  font-weight: 600;
  color: #9bcaff;
}
.social-icons{
  display: flex;
  justify-content: center;
  gap: 25px;
  margin-bottom: 25px;
}
.social-icons img{
  width: 38px;
  height: 38px;
  cursor: pointer;
  transition: transform 0.3s ease, opacity 0.3s ease;
  filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.35));
}
.social-icons img:hover{
  transform: scale(1.1);
  opacity: 0.8;
}
.footer-credit{
  font-size: 0.9rem;
  color: #c7c7c7;
  margin-top: 10px;
}
.p{
  text-align:center;
  padding:18px;
  color:var(--muted);
  margin-top:30px;
}
/* responsive */
@media (max-width:980px){
  .container{grid-template-columns:1fr;padding:0 16px}
  .news-grid{grid-template-columns:1fr}
  .search-wrap input{width:160px}
  .hero-overlay h1{font-size:28px}
}
@media (max-width:520px){
  .search-wrap input{width:120px}
  .hero{height:320px}
  .hero-overlay h1{font-size:20px}
}
@media (max-width:400px){
  .social-icons img {width: 30px; height: 30px}
}
/* animations */
.fade-in{animation:fadeIn .55s both}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}