:root{
  --bg:#0c0f14;
  --panel:#10151f;
  --panel-2:#0c1220;
  --text:#eaf1ff;
  --muted:#9fb0c7;
  --primary:#6d7cff;
  --accent:#2fe1d6;
  --border:rgba(255,255,255,.08);
  --shadow:0 20px 60px rgba(0,0,0,.4);
  --danger:#ff546d;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color:var(--text);
  background:
    radial-gradient(1100px 800px at 85% -10%, rgba(109,124,255,.10), transparent),
    radial-gradient(1000px 700px at -15% 0%, rgba(47,225,214,.10), transparent),
    var(--bg);
}
a{color:var(--accent);text-decoration:none}
.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:10px;
  padding:12px 18px;background:rgba(12,15,20,.7);backdrop-filter: blur(10px);
  border-bottom:1px solid var(--border)}
.brand{font-weight:800;letter-spacing:.4px;color:#fff}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:12px;
  background:linear-gradient(90deg, rgba(109,124,255,.35), rgba(47,225,214,.18));
  border:1px solid var(--border); color:#fff; cursor:pointer; transition:transform .08s ease, box-shadow .2s;
  box-shadow: var(--shadow);}
.btn:hover{transform:translateY(-1px)}
.btn.ghost{background:#121826}
.btn.danger{background:linear-gradient(90deg, #ff546d, #ff7b98)}
.spacer{flex:1}
.container{max-width:760px;margin:0 auto;padding:10px 14px}
.feed{display:flex;flex-direction:column;gap:22px}
.card{position:relative;background:var(--panel);border:1px solid var(--border);border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}
.video-wrap{position:relative;height:100vh;background:#000}
video.post{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:#000}
.controls{position:absolute;left:12px;top:12px;display:flex;gap:8px;z-index:3}
.ctrl{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:12px;
  border:1px solid var(--border);background:rgba(16,21,31,.75);color:#fff;font-size:14px;cursor:pointer}
.overlay{position:absolute;left:14px;right:92px;bottom:14px;z-index:2;color:#fff;display:flex;flex-direction:column;gap:8px;text-shadow:0 2px 16px rgba(0,0,0,.7)}
.user-pill{display:inline-flex;align-items:center;gap:10px;background:rgba(255,255,255,.08);
  border:1px solid var(--border);padding:6px 10px;border-radius:999px;width:max-content}
.avatar{width:34px;height:34px;border-radius:999px;background:linear-gradient(135deg,var(--primary),var(--accent))}
.caption{max-width:680px;line-height:1.45}
.rail{position:absolute;right:12px;bottom:14px;z-index:2;display:flex;flex-direction:column;gap:10px;align-items:center}
.rail button{display:flex;align-items:center;justify-content:center;width:54px;height:54px;border-radius:16px;border:1px solid var(--border);
  background:rgba(16,21,31,.7);backdrop-filter: blur(8px);font-size:22px;color:#fff;cursor:pointer}
.count{font-size:12px;color:#d6e0f7;text-align:center}
.input{background:#0d1526;border:1px solid var(--border);color:#eaf1ff;padding:10px;border-radius:12px;width:100%}
.inline-form{display:flex;gap:8px;align-items:center}
.bottom-nav{position:sticky;bottom:0;z-index:40;display:flex;gap:10px;justify-content:space-around;align-items:center;
  padding:10px;background:rgba(12,15,20,.85);backdrop-filter: blur(10px);border-top:1px solid var(--border)}
.navbtn{display:flex;flex-direction:column;align-items:center;gap:4px;color:#cfe2ff;font-size:12px}
.navbtn-icon{width:36px;height:36px;border-radius:12px;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;background:#121826}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:18px;background:#11182a;border:1px solid var(--border);
  color:#fff;padding:10px 14px;border-radius:12px;display:none;z-index:60}
.toast.show{display:block}
@media (min-width:1024px){ .container{max-width:760px} }